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Air Transport Services Group, Inc. - Annual Report: 2021 (Form 10-K)


UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2021
    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from ________ to ________

Commission file number 000-50368
________________________________________________________________
Air Transport Services Group, Inc.
(Exact name of registrant as specified in its charter)
________________________________________________________________
Delaware26-1631624
(State of Incorporation) (I.R.S. Employer Identification No.)
145 Hunter Drive, Wilmington, OH 45177
(Address of principal executive offices)
937-382-5591
(Registrant’s telephone number, including area code)
 ________________________________________________________________
Securities registered pursuant to Section 12(b) of the Exchange Act:
Title of each class  Trading SymbolName of each exchange on which registered
Common Stock, par value $0.01 per share  ATSGNASDAQ Stock Market LLC
Securities registered pursuant to Section 12(g) of the Exchange Act: None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes No  
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes No
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes No
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulations S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes No
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer
  
Accelerated filerSmaller reporting company
Non-accelerated filerEmerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes No  
The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, as of the last business day of the registrant’s most recently completed second fiscal quarter: $1,157,662,938.
As of March 1, 2022, there were 74,222,011 shares of the registrant’s common stock outstanding.
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the Proxy Statement for the Annual Meeting of Stockholders scheduled to be held May 25, 2022 are incorporated by reference into Parts II and III.



FORWARD LOOKING STATEMENTS
This annual report on Form 10-K, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in Item 7, contains forward-looking statements, within the meaning of the Private Securities Litigation Reform Act of 1995, that involve risks and uncertainties. Forward-looking statements provide current expectations of future events based on certain assumptions and includes any statement that does not directly relate to any historical or current fact. Forward-looking statements can also be identified by words such as “future,” “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “predicts,” “will,” “would,” “could,” “can,” “may,” and similar terms. Forward-looking statements are not guarantees of future performance and the Company’s actual results may differ significantly from the results discussed in the forward-looking statements. Factors that might cause such differences include, but are not limited to, those discussed in “Risk Factors” in Item 1A. The Company assumes no obligation to revise or update any forward-looking statements for any reason, except as required by law.







AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
2021 FORM 10-K ANNUAL REPORT
TABLE OF CONTENTS
    Page
PART I
Item 1.  
Item 1A.  
Item 1B.  
Item 2.  
Item 3.  
Item 4.  
PART II
Item 5.  
Item 6.  
Item 7.  
Item 7A.  
Item 8.  
Item 9.  
Item 9A.  
Item 9B.  
Item 9C.
PART III
Item 10.  
Item 11.  
Item 12.  
Item 13.  
Item 14.  
PART IV
Item 15.  
Item 16.





PART I

ITEM 1. BUSINESS
Company Overview
Founded in 1980, Air Transport Services Group, Inc. is a leading provider of aircraft leasing and air cargo transportation and related services. We lease converted freighter aircraft to customers throughout North America, Europe, Asia and Africa. Our total in service fleet is comprised of 117 Boeing aircraft as of December 31, 2021. To support the needs of our leasing customers, and the aviation and logistics industries at large, we offer a broad array of complementary solutions ranging from flight and ground operations to aircraft maintenance and overhaul services. When the context requires, we may use the terms “Company,” "we," "our" and “ATSG” in this report to refer to the business of Air Transport Services Group, Inc. and its subsidiaries on a consolidated basis.
Strategy
Our primary business segment is aircraft leasing. We acquire used medium wide-body and narrow-body passenger aircraft, manage their conversion into a freighter configuration leveraging our experience as an airline and lease the converted freighters to customers under long-term contracts. The aircraft we target for conversion are ideal for express and e-commerce driven regional air networks. As a result, our aircraft can be deployed into regional markets more economically than larger capacity aircraft, newly built aircraft or other competing alternatives.
We distinguish ourselves from, and gain an advantage over, our competitors by offering a breadth of integrated, complementary aviation- and logistics-related services. Our broad range of ancillary services includes aircraft maintenance and modifications, engine leases and sort and gateway operations.
Our business development and marketing efforts leverage the entire portfolio of our capabilities to create a customized bundled solution to meet our customers' needs. Our ability to offer our customers differentiated services, including aircraft leasing, airline express operations, line and heavy maintenance, and ground handling services makes us unique from other providers in our industry.
Services
We have two reportable segments: Cargo Aircraft Management Inc. ("CAM"), which includes the leasing of aircraft and aircraft engines, and ACMI Services, which includes the cargo and passenger aircraft flight operations of our three airlines. Our other business operations, which primarily provide support services to the transportation industry, do not constitute reportable segments.
CAM
We own and lease aircraft through our subsidiary, CAM. We acquire used passenger aircraft, typically 15-20 years old, and cause them to be converted to a freighter aircraft configuration. Following conversion, we lease those aircraft externally under long-term contracts to a customer base that includes Amazon.com Services, LLC (“ASI”), DHL Network Operations (USA), Inc. and its affiliates (“DHL”), and other airlines as well as internally to our own airline subsidiaries.
At December 31, 2021, we owned 107 Boeing aircraft that were in revenue service. We also owned twelve Boeing 767-300 aircraft and one Airbus 321-200 aircraft either undergoing or awaiting induction into the freighter conversion process. A complete list of the Company's aircraft is included in Item 2, Properties.
We are the world's largest owner of converted Boeing 767 freighter aircraft. Our freighter fleet is composed primarily of Boeing 767 aircraft, which are desirable in regional air networks because of their reliability, cubic cargo capacity and durable performance. Each of the Boeing 767 aircraft we acquire and convert to freighter configuration is expected to have an economic life of at least 20 years. The demand for this aircraft type remains strong and it will remain our primary mid-sized freighter aircraft for the foreseeable future. We have agreements with two aircraft conversion providers, Israel Aerospace Industries ("IAI") and The Boeing Company ("Boeing"), to convert 39 additional Boeing aircraft over the next three years.
Through a joint venture with Precision Aircraft Solutions, LLC, we have developed a design for the conversion of Airbus A321 passenger aircraft into a freighter configuration and in 2021 were granted a Supplemental Type Certificate (“STC”) for such design (An STC is granted by the FAA and represents an ownership right, similar to an
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intellectual property right, which authorizes the alteration of an airframe, engine or component.). The converted Airbus A321 freighter is well suited for air-express service and e-commerce fulfillment over shorter routes with smaller payloads than the Boeing 767. The Airbus A321 can operate with more fuel efficiency than the comparable freighter aircraft variants of the Boeing 737 and Boeing 757. We have begun acquiring A321 aircraft for conversion to grow our fleet and further support our ability to meet the growing demand worldwide for narrow-body freighter aircraft.
We have also entered into an agreement with Elbe Flugzeugwerke (“EFW”) to secure the right to convert 29 Airbus A330 passenger aircraft to a freighter configuration with EFW. The first aircraft induction is expected to occur in mid-2023. The Airbus A330 aircraft can provide capabilities similar to the Boeing 767 for medium wide-body airlift. The pending addition of this aircraft type to our fleet has already began to open new streams of customer interest and demand internationally.
Under a typical lease arrangement, the customer maintains the aircraft in serviceable condition at its own cost. At the end of the lease term, the customer is typically required to return the aircraft in approximately the same maintenance condition that existed at the inception of the lease, as measured by airframe and engine time and cycles since the last scheduled maintenance event. CAM examines the credit worthiness of potential customers, their short and long-term growth prospects, their financial condition and backing, the experience of their management, and the impact of governmental regulations when determining the lease rate that is offered to the customer. In addition, CAM monitors the customer’s business and financial status throughout the term of the lease.
ACMI Services
ACMI Services consists of the operations of our three airline subsidiaries: ABX Air, Inc. (“ABX”), Air Transport International, Inc. (“ATI”), and Omni Air International, LLC (“OAI”). Each of these airlines is independently certificated by the United States Department of Transportation ("DOT") and the Federal Aviation Administration ("FAA").
A typical operating agreement for airline services requires us to supply a combination of aircraft, crew, maintenance and/or insurance for specified transportation operations. These services are commonly referred to as ACMI, CMI or charter services depending on the selection of services contracted by the customer. The customer bears the responsibility for capacity utilization and unit pricing in all cases.
ACMI - The airline provides the aircraft, flight crews, aircraft maintenance and aircraft hull and liability insurance while the customer is typically responsible for substantially all other aircraft operating expenses, including fuel, landing fees, parking fees and ground and cargo handling expenses.
CMI - The customer is responsible for providing the aircraft, in addition to the fuel and other operating expenses. The airline provides the flight crews, aircraft hull and liability insurance and typically aircraft line maintenance as needed between network flights.
Charter - The airline is responsible for providing full service, including fuel, aircraft, flight crews, maintenance, aircraft hull and liability insurance, landing fees, parking fees, catering, passenger handling fees, ground and cargo handling expenses and other operating expenses for an all-inclusive price.
The majority of the aircraft operated by our airlines are owned by CAM. Those aircraft are either leased directly to CAM's customer or leased to one of our airlines. A summary of our airlines are below:
ABX
ABX operates 767 aircraft exclusively in freighter configuration. ABX specializes in providing aircraft operations to customers in the e-commerce and express delivery markets, with DHL as its largest customer.
ATI
ATI operates Boeing 767 freighter aircraft and Boeing 757 “combi” aircraft, which are capable of simultaneously carrying passengers and cargo containers on the main flight deck. ATI operates its fleet of Boeing 767 primarily for the express package industry and freight forwarders, with ASI as its largest customer. It operates its fleet of Boeing 757 “combi” aircraft primarily for the United States Department of Defense ("DoD").

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OAI
In November 2018, we acquired OAI, a passenger airline, along with its related entities ("Omni"). OAI operates Boeing 767 and Boeing 777 passenger aircraft. OAI carries passengers worldwide for a variety of private sector customers and government services agencies. It provides tailored passenger and government charter services, airline startup and route development services.
ABX, ATI and OAI are each participants in the Civil Reserve Air Fleet (“CRAF”), a National Emergency Preparedness Program designed to augment the airlift capability of the DoD and meet the national security interests and contingency requirements of the U.S. Transportation Command (“USTC”). The combined efforts of our airlines make us the nation’s largest provider of passenger charter service to DoD and other governmental agencies.
Support Services
We provide a wide range of air transportation related services to our customers including aircraft maintenance and modification, ground support and crew training.
Aircraft Maintenance and Modification
Our aircraft maintenance and modification services, which are provided primarily by our subsidiaries Airborne Maintenance and Engineering Services, Inc. (“AMES”) and Pemco World Air Services, Inc. ("Pemco"), provide airframe modification and heavy maintenance, component repairs, engineering services and aircraft line maintenance. Another subsidiary, AMES Material Services, Inc., resells and brokers aircraft parts. AMES and Pemco are certified by the Federal Aviation Administration (“FAA”) under Part 145 of the Federal Aviation Regulations. Pemco performs passenger-to-freighter and passenger-to-combi conversions for certain Boeing series aircraft and has begun performing passenger-to-freighter conversions for Airbus A321 aircraft. Both AMES and Pemco own many STCs and similar approvals issued by the FAA which are marketed to its customers.
Ground Support
Through the Company's subsidiary, LGSTX Services Inc. ("LGSTX"), we provide labor and management for cargo load transfer and sorting; the design, installation and maintenance of material handling equipment; the leasing and maintenance of ground support equipment; and general faclities maintenance. LGSTX also resells aviation fuel at the airpark in Wilmington, Ohio.
Crew Training
Our support services also involve the training of flight crews, which we offer through our subsidiary, Airborne Training Services, Inc. ("ATS"). ATS is certificated under Part 142 of the Federal Aviation Regulations to offer flight crew training to customers. ATS also offers Boeing 757 and Boeing 767 flight simulators which can be rented by customers for use in conjunction with their flight training programs.
Major Customers
We have long-standing, strategic customer relationships with ASI, the DoD, and DHL, described below.
Amazon
We have been providing aircraft, flight operations, cargo handling and logistics support services to ASI, a subsidiary of Amazon.com, Inc. ("Amazon"), since September 2015. On March 8, 2016, we entered into an Air Transportation Services Agreement (as amended, the “ATSA”) with ASI pursuant to which we lease Boeing 767 freighter aircraft to ASI through our subsidiary, CAM, operate the aircraft via our airline subsidiaries and are responsible for complying with FAA airworthiness directives, the cost of Boeing 767 airframe maintenance and certain engine maintenance events for the aircraft leased to ASI that we operate. We also provide ground handling services through our subsidiaries. Under the ATSA, we operate aircraft based on pre-defined fees scaled for the number of aircraft hours flown, aircraft scheduled and flight crews provided to ASI for its network. The operating term of the ATSA runs through March of 2026 and is thereafter subject to renewal provisions. Revenues from our commercial arrangements with ASI comprised approximately 35% of our consolidated revenues for 2021. As of December 31, 2021, we were leasing 42 of CAM's Boeing 767 aircraft to ASI under multi-year contracts. We operate all these aircraft and four more ASI-provided aircraft under the CMI provisions of the ATSA.
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In conjunction with the execution of the ATSA and its amendments, the Company and ASI entered into an Investment Agreement (the 2016 Investment Agreement) and a Stockholders' Agreement on March 8, 2016 and a second Investment Agreement on December 20, 2018 (the 2018 Investment Agreement). Pursuant to these Investment Agreements, the Company issued warrants to Amazon in conjunction with aircraft leases. For additional information about the warrants issued under the 2016 and 2018 Investment Agreements, see Note C to the Consolidated Financial Statements.
U.S. Department of Defense
We have been providing services to the DoD since the 1990’s. The DoD comprised 26% of our consolidated revenues for 2021. Our business with the DoD and other government agencies expanded significantly as a result of our November 2018 acquisition of OAI.
Our participation in CRAF allows our airlines to bid for military charter operations for passenger and cargo transportation. Our airlines provide charter operations to the Air Mobility Command ("AMC") through contracts awarded by the U.S. Transportation Command, both of which are organized under the DoD.
The USTC secures airlift capacity through fixed awards, which are awarded annually, and through bids for "expansion routes" which are awarded on a quarterly, monthly and as-needed basis. Under the contracts, we are responsible for all operating expenses including fuel, landing and ground handling expenses. We receive reimbursements from the USTC each month if the price of fuel paid by us for the flights exceeds a previously set peg price. If the price of fuel paid by us is less than the peg price, then we pay the difference to the USTC. Airlines may participate in CRAF either independently, or through teaming arrangements with other airlines. Our airlines are members of the Patriot Team of CRAF airlines. We pay a commission to the Patriot Team, based on certain revenues we receive under USTC contracts.
ATI contracts with the USTC to operate its unique fleet of four Boeing 757 "combi" aircraft, which are capable of simultaneously carrying passengers and cargo containers on the main flight deck. ATI has been operating combi aircraft for the DoD since 1993. The USTC contracted with ATI to provide combi aircraft operations through September 2022. OAI has been operating aircraft for the DoD since 1995. Contracts with the USTC are typically for a one-year period; however, the current passenger international charter contract has a two-year term with option periods, at the election of the USTC, through September 2024.
DHL
We have provided aircraft services to DHL under multi-year contracts since August 2003. DHL accounted for 12% of our consolidated revenues for 2021. As of December 31, 2021, we were leasing 12 of our Boeing 767 aircraft to DHL under multi-year contracts. We operate eight of these aircraft for DHL under a separate CMI agreement with DHL, along with two DHL-supplied aircraft. We operate and maintain the aircraft based on pre-defined fees scaled for the number of aircraft hours flown, aircraft scheduled and flight crews provided to DHL for its network. Under the pricing structure of the DHL CMI agreement, we are responsible for complying with FAA airworthiness directives, the cost of Boeing 767 airframe maintenance and certain engine maintenance events for the aircraft leased to DHL that we operate. We also provide ground equipment and maintenance services to DHL in the U.S. In February 2022, DHL agreed to a six-year extension of the DHL CMI agreement through April 2028.
Competitive Conditions
Competition for aircraft lease placements is generally affected by aircraft type, aircraft availability and lease rates. The aircraft in our fleet provide cost-effective air transportation for medium range requirements. We target our leases to cargo airlines and delivery companies seeking medium widebody airlift. Competitors in the aircraft leasing industry include GE Capital Aviation Services and Altavair Aviation Leasing, among others.
The primary competitive factors in the air transportation industry are operating costs, fuel efficiency, geographic coverage, aircraft range, aircraft reliability and capacity. The cost of airline operations is significantly impacted by the cost of flight crewmembers, which can vary among airlines depending on their collective bargaining agreements. Competitors in the air transportation industry include Amerijet International, Inc., Atlas Air, Inc., Kalitta Air LLC, Northern Air Cargo, LLC, National Air Cargo Group, Inc., and Western Global Airlines, LLC. Of these, Atlas Air, Inc. and National Air Cargo Group, Inc., (operating as National Airlines) also operate passenger aircraft. Cargo airlines also compete for cargo volumes with passenger airlines that have substantial belly cargo capacity.
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The aircraft maintenance industry is labor intensive and typically competes based on cost, capabilities and reputation for quality. U.S. airlines may contract for aircraft maintenance with maintenance and repair organizations ("MROs") in other countries or geographies with a lower labor wage base, making the industry highly cost competitive. Other aircraft MROs include AAR Corp and Hong Kong Aircraft Engineering Co.
Demand for air cargo transportation services correlates closely with general economic conditions and the level of commercial activity in a geographic area. Stronger general economic conditions and growth in a region typically increases the need for air transportation. E-commerce growth is a strong indicator of growth in the express and network flying businesses which we enable with our assets and services. Historically, the cargo industry has experienced higher volumes during the fourth calendar quarter of each year due to increased shipments during the holiday season. Generally, time-critical delivery needs, such as just-in-time inventory management, increase the demand for air cargo delivery, while higher costs of aviation fuel generally reduces the demand for air delivery services. When aviation fuel prices increase, shippers will consider using ground transportation if the delivery time allows.
Human Capital
Description
As of December 31, 2021, our workforce was composed of 5,280 full-time and part-time employees. We employed approximately 1,090 flight crewmembers, 360 flight attendants, 205 flight support personnel, 1,915 aircraft maintenance managers and technicians, 1,175 employees for ground equipment and logistics services, 50 employees for sales and marketing and 485 employees for administrative functions. In addition to full-time and part-time employees, we often employ contractors and temporary employees to assist in aircraft line maintenance and package sortation during peak operational times. On December 31, 2020, the Company had approximately 5,305 full-time and part-time employees. Over 99% of our workforce is based in the United States.
The Company’s flight crewmembers and flight attendants are unionized employees. The table below summarizes the representation of the Company’s flight crewmembers at December 31, 2021.
Airline  Labor Agreement Unit  Contract
Amendable
Date
  Percentage of
the Company’s
Employees
ABX  International Brotherhood of Teamsters  1/1/2027  5.2%
ATI  Air Line Pilots Association  3/21/2021  9.3%
OmniInternational Brotherhood of Teamsters4/1/20216.1%
ATI  Association of Flight Attendants  11/14/2023  0.6%
OmniAssociation of Flight Attendants12/1/20216.2%
Under the Railway Labor Act (“RLA”), as amended, crewmember labor agreements do not expire, so the existing contract remains in effect throughout any negotiation process. If required, mediation under the RLA is conducted by the National Mediation Board, which has the sole discretion as to how long mediation can last and when it will end. In addition to direct negotiations and mediation, the RLA includes a provision for potential arbitration of unresolved issues and a 30-day “cooling-off” period before either party can resort to self-help, including, but not limited to, a work stoppage.
Objectives
Our employees are critical to the on-going success of the Company. Our approach to managing human capital includes the following: maintaining the health and safety of our employees; attracting and retaining skilled individuals; continuously improving the skills of our workforce; promoting inclusive and engaging work environments; and compensating and treating all employees fairly. We believe that every person deserves an equally respectful work environment regardless of race, ethnicity, capability, age, gender, or sexual orientation. We work to maintain a culture of inclusion for all employees.
To attract and retain skilled employees, we offer competitive compensation and benefits, including medical care, paid time off, retirement savings, mental health counseling and other employee benefits. Further, we are committed
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to training and supporting our employees' continuous development of professional, technical and management skills. We develop technical training programs which facilitate the licensure and certification of flight crews, aviation mechanics and other skilled jobs. We partner with third parties to assist employees in developing leadership skills and valuing diversity in our workforce. During 2021, our voluntary employee resignation rate increased from 11% to approximately 20%. We attribute the increase to the challenging impact that the COVID-19 pandemic has had on the workforce and labor markets.
The health and safety of our employees is paramount. Our airline operations rely on flight crews, aircraft maintenance technicians, flight support personnel and aircraft loading personnel. We rely on a skilled workforce to perform aircraft maintenance. Similarly, we staff personnel near airports to sort customer packages, load aircraft and maintain related equipment. We have taken precautions to prevent, detect and limit the spread of the COVID-19 virus in the workplace. We have added extra precautions and redundancies related to crew reserves, employee travel protocols, sanitation and other measures. We have encouraged our employees to take precautions and have given our employees the opportunity to get vaccinated.
The Company has received funds to protect employees' jobs by offsetting payroll expenses under the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), the Consolidated Appropriations Act, 2021 (the "PSP Extension Law"), and the American Rescue Plan Act of 2021 (the "American Rescue Plan"). Under the CARES Act, OAI and ATI agreed on behalf of themselves and ABX, to refrain from conducting involuntary furloughs or reducing employee rates of pay or benefits through September 30, 2020, and OAI subsequently agreed, as a condition of receiving funds under the PSP Extension Law and thereafter under the American Rescue Plan, to refrain from conducting involuntary furloughs or reducing employee rates of pay or benefits through March 31, 2021 and September 31, 2021 respectively.
Flight crewmembers are required to be licensed in accordance with Federal Aviation Regulations (“FARs”), with specific ratings for the aircraft type to be flown, and to be medically certified as physically fit to operate aircraft. Licenses and medical certifications are subject to recurrent requirements as set forth in the FARs, to include recurrent training and minimum amounts of recent flying experience.
The FAA requires initial and recurrent training for most flight and maintenance personnel. Quality control inspectors must also be licensed and qualified to perform maintenance inspections on Company operated and maintained aircraft. The majority of our aircraft mechanics have one or more FAA licenses. Our subsidiaries pay for all of the required recurrent training and provide training for their ground service personnel as well. Their training programs have received all required FAA approvals. Similarly, our flight dispatchers and flight followers receive FAA approved training on the airlines' requirements and specific aircraft.
Information Systems
We are dependent on technology to conduct our daily operations including data processing, communications and regulatory compliance. We rely on critical computerized systems for aircraft maintenance records, flight planning, crew scheduling, employee training, financial records, cyber-security and other processes. We utilize information systems to maintain records about the maintenance status and history of each major aircraft component, as required by FAA regulations. Using our information systems, we track aircraft maintenance schedules and also control inventories and maintenance tasks, including the work directives of personnel performing those tasks. We rely on information systems to track crewmember flight and duty times, and crewmember training status. The Company’s flight operations systems coordinate flight schedules and crew schedules.
We invest significant time and financial resources to acquire, develop and maintain information systems to facilitate our operations. Our information technology infrastructure includes security measures, backup procedures and redundancy capabilities. We rely increasingly on software applications, hosted technologies, data transmissions and cybersecurity safe-guards provided by or in conjunction with third parties. To remain competitive, we must continue to deploy new technologies while controlling costs and maintaining regulatory compliance and security safeguards.

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Executive Officers
The following table sets forth information about the Company’s executive officers. The executive officers serve at the pleasure of the Company’s Board of Directors:
NameAgeInformation
Richard F. Corrado62 
President and Chief Executive Officer, Air Transport Services Group, Inc., since May 2020 and President of Air Transport Services Group, Inc. since September 2019.
Chief Operating Officer, Air Transport Services Group, Inc., from September 2017 to September 2019. Chief Executive Officer of Cargo Aircraft Management, Inc. since March 2020. President of Cargo Aircraft Management Inc., from April 2010 to January 2020. Chief Executive Officer of Airborne Global Solutions, Inc. since May 2020. President of Airborne Global Solutions, Inc. from July 2010 to January 2020. Mr. Corrado was Chief Commercial Officer, Air Transport Services Group, Inc., from April 2010 to September 2017.
Before joining Air Transport Services Group, Inc., Mr. Corrado was President of Transform Consulting Group from July 2006 through March 2010 and Chief Operating Officer of AFMS Logistics Management from February 2008 through March 2010. He was Executive Vice President of Air Services and Business Development for DHL Express from September 2003 through June of 2006; and Senior Vice President of Marketing for Airborne Express from August 2000 through August 2003.
Quint O. Turner59 
Chief Financial Officer, Air Transport Services Group, Inc., since February 2008 and Chief Financial Officer, ABX Air, Inc. since December 2004.
 
Mr. Turner was Vice President of Administration of ABX Air, Inc. from February 2002 to December 2004. Mr. Turner was Corporate Director of Financial Planning and Accounting of ABX Air, Inc. from 1997 to 2002. Prior to 1997, Mr. Turner held positions of Manager of Planning and Director of Financial Planning of ABX Air, Inc. Mr. Turner joined ABX Air, Inc. in 1988.
Edward J. Koharik51 Chief Operating Officer, Air Transport Services Group, Inc., since September 2019. Before joining ATSG, Mr. Koharik served as Vice President of FlightSafety International, a global provider of flight training for commercial, business and military aviation professionals and flight simulation equipment, from January 2019 to September 2019. He was the General Manager and Executive Director of FlightSafety International Visual Systems from 2015 to 2018. He served as the Enterprise Readiness Center Chief for the U.S. Transportation Command from 2011 to 2015.
W. Joseph Payne58 Chief Legal Officer & Secretary, Air Transport Services Group, Inc., since May 2016; Senior Vice President, Corporate General Counsel and Secretary, Air Transport Services Group, Inc., since February 2008; and Vice President, General Counsel and Secretary, ABX Air, Inc. since January 2004.
 
Mr. Payne was Corporate Secretary/Counsel of ABX Air, Inc. from January 1999 to January 2004, and Assistant Corporate Secretary from July 1996 to January 1999. Mr. Payne joined ABX Air, Inc. in April 1995.
Michael L. Berger60 
Chief Commercial Officer, Air Transport Services Group, Inc., since March 2018 and President of Airborne Global Solutions, Inc. since May 2018. Before joining ATSG, Mr. Berger was Chief Commercial Officer for Dicom Transportation Group of Canada from March 2017 through February 2018. Mr. Berger was Global Head of Sales for TNT Express based in Amsterdam from September 2014 through February 2017.
Mr. Berger joined Airborne Express in 1986 and worked 28 years for Airborne Express and its successor, DHL Express, where he held many roles including Head of Sales for the United States.
The executive officers of the Company are appointed annually at the Board of Directors meeting held in conjunction with the annual meeting of stockholders and serve at the pleasure of the Board of Directors. There are no family relationships between any directors or executive officers of the Company.
Regulation
Our subsidiaries’ airline operations are primarily regulated by the DOT, the FAA, and the TSA. Those operations must comply with numerous economic, safety, security and environmental laws, ordinances and regulations. In addition, they must comply with various other federal, state, local and foreign laws and regulations.
Environment
The U.S. Environmental Protection Agency ("EPA") is authorized to regulate aircraft emissions and has historically implemented emissions control standards adopted by the International Civil Aviation Organization ("ICAO"). In 2016, the EPA issued a finding on greenhouse gas ("GHG") emissions from aircraft and its relationship to air pollution. This finding is a regulatory prerequisite to the EPA’s adoption of a new certification standard for aircraft emissions. In January 2021, the EPA issued a final rule regarding GHG emissions standards for new aircraft engines consistent with ICAO standards that were adopted in 2017. The EPA final rule does not apply to engines on aircraft that are already in service, as is also the case with the ICAO standards. However, President Biden's Administration has stated that it plans to review the EPA emissions standards issued by the prior Administration and, further, the EPA standards have been challenged by several states and environmental organizations. We cannot predict the results of the Biden Administration's review or the outcome of legal challenges to the EPA's final rules. Our subsidiaries’ aircraft meet all currently applicable requirements for engine emission levels.
Under the Clean Air Act, individual states or the EPA may also adopt regulations requiring reductions in emissions for one or more localities based on the measured air quality at such localities. These regulations may seek to limit or restrict emissions by restricting the use of emission-producing ground service equipment or aircraft auxiliary power units. Further, the U.S. Congress has, in the past, considered legislation that would regulate GHG emissions, and some form of federal climate change legislation is possible in the future.
In addition, the European Commission has approved the extension of the European Union Emissions Trading Scheme ("ETS") for GHG emissions to the airline industry. Currently, under the European Union’s ETS, all ABX, ATI and OAI flights that are wholly within the European Union are covered by the ETS requirements, and each year our airlines are required to submit emission allowances in an amount equal to the carbon dioxide emissions from such flights. If the airline's flight activity during the year produces carbon emissions exceeding the number of carbon emissions allowances that it had been awarded, the airline must acquire allowances from other airlines in the open market. Our airlines operate intra-EU flights from time to time and management believes that such flights are operated in compliance with ETS requirements.
Similarly, in 2016, the ICAO passed a resolution adopting the Carbon Offsetting and Reduction Scheme for International Aviation (“CORSIA”), which is a global, market-based emissions offset program to encourage carbon-neutral growth beyond 2020. A pilot phase began in 2021 in which countries may voluntarily participate, followed by a first phase of the program beginning in 2024 that is also voluntary, and full mandatory participation is scheduled to begin in 2027. The United States has agreed to participate in the two voluntary phases. ICAO continues to develop details regarding implementation, but compliance with CORSIA will increase our operating costs.
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The U.S. has also re-entered the Paris climate accord, an agreement among 196 countries to reduce GHG emissions, and the effect of the re-entry by the U.S. on future U.S. policy regarding GHG emissions, on CORSIA and on other GHG regulation is uncertain.
The federal government generally regulates aircraft engine noise at its source. However, local airport operators may, under certain circumstances, regulate airport operations based on aircraft noise considerations. The Airport Noise and Capacity Act of 1990 provides that, in the case of Stage 3 aircraft (all of our operating aircraft satisfy Stage 3 noise compliance requirements), an airport operator must obtain the carriers’ consent to, or the government’s approval of, the rule prior to its adoption. We believe the operation of our airline subsidiaries’ aircraft either complies with or is exempt from compliance with currently applicable local airport rules. However, some airport authorities have adopted local noise regulations, and, to the extent more stringent aircraft operating regulations are adopted on a widespread basis, our airline subsidiaries may be required to spend substantial funds, make schedule changes or take other actions to comply with such local rules.
Department of Transportation
The DOT maintains authority over certain aspects of domestic and international air transportation serving the United States, such as consumer protection, accommodation of passengers with disabilities, requiring a minimum level of insurance and the requirement that a company be “fit” to hold a certificate to engage in air transportation. In addition, the DOT continues to regulate many aspects of international aviation, including the award of certain international routes. The DOT has issued to ABX a Domestic All-Cargo Air Service Certificate for air cargo transportation between all points within the U.S., the District of Columbia, Puerto Rico, and the U.S. Virgin Islands. The DOT has issued to ATI certificate authority to engage in scheduled interstate air transportation, which is currently limited to all-cargo operations. ATI's DOT certificate authority also authorizes it to engage in interstate and foreign charter air transportation of persons, property and mail.  Additionally, the DOT has issued to ABX and ATI Certificates of Public Convenience and Necessity authorizing each of them to engage in scheduled foreign air transportation of cargo and mail between the U.S. and all current and future U.S. open-skies partner countries, which currently consists of approximately 130 foreign countries.  ABX and ATI also hold exemption authorities issued by the DOT to conduct scheduled all-cargo operations between the U.S. and certain foreign countries with which the U.S. does not have a liberal ("open-skies") air transportation agreement. The DOT has issued to OAI a Certificate of Public Convenience and Necessity for Interstate Charter Air Transportation and a Certificate of Public Convenience and Necessity for Foreign Charter Air Transportation that authorizes it to engage in interstate and foreign charter air transportation of persons, property and mail. In 2019, the DOT also issued OAI exemption authority to engage in scheduled foreign air transportation of property and mail between the U.S. and all existing and future countries with an open-skies air service agreement with the U.S.
By maintaining these certificates, the Company, through ABX and ATI, can and currently does conduct all-cargo charter operations worldwide subject to the receipt of any necessary foreign government approvals. Further, the certificates issued to ATI and OAI authorize the air carriers to conduct passenger charter operations worldwide subject to the receipt of any necessary foreign government approvals. Periodically, the DOT re-examines a company’s managerial competence, financial resources and plans, compliance disposition and citizenship in order to determine whether the carrier remains fit, willing and able to engage in the transportation services it is authorized to provide.
The DOT has the authority to impose civil penalties, or to modify, suspend or revoke our certificates and exemption authorities for cause, including failure to comply with federal laws or DOT regulations. A corporation or a limited liability company structured like a corporation holding the above-referenced certificates and exemption authorities must continuously qualify as a citizen of the United States, which, pursuant to federal law, requires that (1) it be organized under the laws of the U.S. or a state, territory or possession thereof, (2) that its president and at least two-thirds of its Board of Directors and other managing officers be U.S. citizens, (3) that no more than 25% of its voting interest be owned or controlled by non-U.S. citizens, and (4) that it not otherwise be subject to foreign control. We believe our airline subsidiaries possess all necessary DOT-issued certificates and authorities to conduct their current operations and that each continues to qualify as a citizen of the United States.

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Federal Aviation Administration
The FAA regulates aircraft safety and flight operations generally, including equipment, ground facilities, maintenance, flight dispatch, training, communications, the carriage of hazardous materials and other matters affecting air safety. The FAA issues operating certificates and detailed "operations specifications" to carriers that possess the technical competence to safely conduct air carrier operations. In addition, the FAA issues certificates of airworthiness to each aircraft that meets the requirements for aircraft design and maintenance. ABX, ATI and OAI believe they hold all airworthiness and other FAA certificates and authorities required for the conduct of their business and the operation of their aircraft. The FAA has the power to suspend, modify or revoke such certificates for cause and to impose civil penalties for any failure to comply with federal laws or FAA regulations.
The FAA has the authority to issue regulations, airworthiness directives and other mandatory orders relating to, among other things, the inspection, maintenance and modification of aircraft and the replacement of aircraft structures, components and parts, based on industry safety findings, the age of the aircraft and other factors. If the FAA were to determine that the aircraft structures or components are not adequate, it could order our airline subsidiaries and other operators to take certain actions, including but not limited to, grounding aircraft, reducing cargo loads, strengthening any structure or component found to be inadequate, or making other modifications to the aircraft. New mandatory directives could also be issued requiring the Company’s airline subsidiaries to inspect and replace aircraft components based on their age or condition. As a routine matter, the FAA issues airworthiness directives applicable to the aircraft operated by our airline subsidiaries, and our airlines comply, sometimes at considerable cost, as part of their aircraft maintenance program.
In addition to the FAA practice of issuing regulations and airworthiness directives as conditions warrant, the FAA has adopted new regulations to address issues involving aging, but still economically viable, aircraft on a more systematic basis. FAA regulations mandate that aircraft manufacturers establish aircraft limits of validity and service action requirements based on the number of aircraft flight cycles (a cycle being one takeoff and one landing) and flight hours before widespread fatigue damage might occur. Service action requirements include inspections and modifications to preclude development of significant fatigue damage in specific aircraft structural areas. The Boeing Company has provided its recommendations of the limits of validity to the FAA, and the FAA has now approved the limits for the Boeing 757, 767 and 777 model aircraft. Consequently, after the limit of validity is reached for a particular model aircraft, air carriers will be unable to continue to operate the aircraft without the FAA first granting an extension of time to the operator. There can be no assurance that the FAA would extend the deadline, if an extension were to be requested. At this point, we do not foresee a situation in which we would seek an extension from the FAA for an aircraft.
The FAA requires each of our airline subsidiaries to implement a drug and alcohol testing program with respect to all employees performing safety sensitive functions and, unless already subject to testing, contractor employees that engage in safety sensitive functions. We believe that each of the Company's airlines complies with these regulations.
Transportation Security Administration
The TSA, an administration within the Department of Homeland Security, is responsible for the screening of passengers and their baggage. TSA rules also require airlines to adopt and comply with standard aircraft operator security programs, including the manner in which cargo must be screened prior to being loaded on aircraft. We believe that our airline subsidiaries comply with all applicable aircraft, passenger and cargo security requirements. The TSA has adopted cargo security-related rules that have imposed additional burdens on our airlines and our customers. The TSA also requires each airline to perform criminal history background checks on all employees. In addition, we may be required to reimburse the TSA for the cost of security services it may provide to the Company’s airline subsidiaries in the future. The TSA holds (and has exercised) authority to issue regulations, including in cases of emergency the authority to do so without advance notice, including issuance of a grounding order as occurred on September 11, 2001. TSA's enforcement powers are similar to the DOT's and FAA's described above.

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International Regulations
When operating in other countries, our airlines are subject to aviation agreements between the U.S. and the respective countries or, in the absence of such an agreement, the airlines' operating rights are governed by principles of reciprocity. International aviation agreements are periodically subject to renegotiation, and changes in U.S. or foreign governments could result in the alteration or termination of the agreements affecting our international operations. Commercial arrangements such as ACMI agreements between our airlines and our customers in other countries, may require the approval of foreign governmental authorities. Foreign authorities may limit or restrict the use of our aircraft in certain countries. Also, foreign government authorities often require licensing and business registration before beginning operations. Foreign laws, rules, regulations and licensing requirements governing air transportation are generally similar, in principle, to the regulatory scheme of the United States as described above, although in some cases foreign requirements are comparatively less onerous and in others, more onerous. Such authorities have enforcement powers generally similar to those of the U.S. agencies described above.
Data Protection
There has recently been increased regulatory and enforcement focus on data protection in the U.S. (at both the state and federal level) and in other countries. For example, the European Union ("E.U.") General Data Protection Regulation ("GDPR"), which became effective in May 2018, greatly increases the jurisdictional reach of E.U. law and increases the requirements related to the protection of personal data, including individual notice and opt-out preferences and public disclosure of significant data breaches. Additionally, violations of the GDPR can result in significant fines. Other governments have enacted or are enacting similar data protection laws, and are considering data localization laws that would govern the use of data outside of their respective jurisdictions.
Other Regulations
Various regulatory authorities have jurisdiction over significant aspects of our business, and it is possible that new laws or regulations or changes in existing laws or regulations or the interpretations thereof could have a material adverse effect on our operations. In addition to the above, other laws and regulations to which we are subject, and the agencies responsible for compliance with such laws and regulations, include the following:
 
The labor relations of our airline subsidiaries are generally regulated under the Railway Labor Act, which vests in the National Mediation Board certain regulatory powers with respect to disputes between airlines and labor unions arising under collective bargaining agreements; 
The Federal Communications Commission regulates our airline subsidiaries’ use of radio facilities pursuant to the Federal Communications Act of 1934, as amended; 
U.S. Customs and Border Protection issues landing rights, inspects passengers entering the United States, and inspects cargo imported to the U.S. from our subsidiaries’ international operations, and those operations are subject to similar regulatory requirements in foreign jurisdictions;
The U.S. Centers for Disease Control and Prevention has authority to impose requirements related to the mitigation of communicable diseases such as requiring masking on aircraft, negative test results, collection of passenger data for contact tracing, quarantine requirements;
The Company and its subsidiaries must comply with U.S. Citizenship and Immigration Services regulations regarding the eligibility of our employees to work in the U.S., and the entry of passengers to the U.S.; 
The Company and its subsidiaries must comply with wage, work conditions and other regulations of the Department of Labor regarding our employees; and
The Office of Foreign Assets Control ("OFAC") of the U.S. Department of the Treasury and other government agencies administer and enforce economic and trade sanctions based on U.S. foreign policy, which may limit our business activities in and for certain areas.  

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Available Information
For more more information concerning Company's sustainability initiatives, please refer to our website, www.atsginc.com. The information contained on our website is not a part of this annual report on Form 10-K.
Our filings with the Securities and Exchange Commission ("SEC"), including annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to these reports, are available free of charge from our website at www.atsginc.com as soon as reasonably practicable after filing with the SEC. The SEC maintains an Internet site that contains reports, proxy and information statements and other information regarding Air Transport Services Group, Inc. at www.sec.gov.

ITEM 1A. RISK FACTORS
The risks described below could adversely affect our financial condition or results of operations. The risks below are not the only risks that the Company faces. Additional risks that are currently unknown to us or that we currently consider immaterial or unlikely could also adversely affect the Company.
Regulatory and Compliance Risk
Failure to maintain the operating certificates and authorities of our airlines would adversely affect our business.
Our airline subsidiaries have the necessary authority to conduct flight operations pursuant to the economic authority issued by the DOT and the safety based authority issued by the FAA. The continued effectiveness of such authority is subject to their compliance with applicable statutes and DOT, FAA and TSA rules and regulations, including any new rules and regulations that may be adopted in the future. The loss of such authority by an airline subsidiary could cause a default of covenants in our Senior Credit Agreement and would materially and adversely affect its airline operations, effectively eliminating the airline's ability to continue to provide air transportation services.
Failure to comply with the provisions of payroll support programs could result in the Company being required to repay government funds and also being subject to other remedies.
Two of the Company's airline subsidiaries, OAI and ATI, were granted government funds totaling $75.8 million pursuant to separate payroll support program agreements under the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) and OAI was thereafter granted additional government funds totaling $37.4 million (this grant was subsequently increased by $5.6 million) and $40.0 million pursuant to payroll support program agreements under each of the Consolidated Appropriations Act, 2021 (the “PSP Extension Law”) and the American Rescue Plan Act of 2021 (the "American Rescue Plan"), respectively. The grant of government funds to OAI and ATI under the CARES Act, PSP Extension Law and the American Rescue Plan totaled $158.8 million.
In conjunction with the payroll support program agreements entered into under the CARES Act, OAI and ATI agreed on behalf of themselves and ABX to refrain from conducting involuntary furloughs or reducing employee rates of pay or benefits through September 30, 2020. Thereafter, OAI agreed as a condition of grants under the PSP Extension Law and the American Rescue Plan to refrain from conducting involuntary furloughs or reducing employee rates of pay or benefits through March 31, 2021 and September 30, 2021, respectively. Under the CARES Act, the airlines agreed to limit, on behalf of themselves and certain of their affiliates, executive compensation through March 24, 2022; maintain certain air transportation service through March 1, 2022 as may be required by the U.S. Department of Transportation pursuant to its authority under the CARES Act; and maintain certain internal controls and records relating to the funds and comply with certain reporting requirements. OAI further agreed as a condition of receiving grants under the PSP Extension Law and thereafter the American Rescue Plan Act, to limit executive compensation through October 1, 2022, and April 1, 2023, respectively. In addition, the Company may not pay dividends or repurchase its shares through September 30, 2022.
If we were found to be noncompliant with the payroll support program agreements under the CARES Act, the PSP Extension Law or the American Rescue Plan, the Company may be required to repay the government funds and may also be subject to other penalties.

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Our business could be negatively impacted by adverse audit findings by the U.S. Government.
Our DoD contracts are subject to audit by government agencies, including with respect to performance, costs, internal controls and compliance with applicable laws and regulations. If an audit uncovers improprieties, we may be subject to civil or criminal penalties, including termination of such contracts, forfeiture of profits, fines and suspension from doing business with the DoD. In addition, the DOT, FAA, TSA and other government agencies can initiate announced or unannounced investigations of our subsidiary air carriers, repair stations and other entities to determine if they are continuously conducting their operations in accordance with all applicable laws, rules and regulations. If an investigation uncovered a failure to comply, we may be subject to civil or criminal penalties.
Our participation in the CRAF Program could adversely restrict our commercial business in times of national emergency.
All three of our airlines participate in the CRAF Program, which permits the DoD to utilize the airlines’ aircraft pledged to the Program during national emergencies when the need for military airlift exceeds the capability of military aircraft. In the event of such an emergency, our airline subsidiaries could incur the loss of use of such aircraft under commercial arrangements, which could have an adverse impact on our operating results.
Proposed rules from the DOT, FAA and TSA could increase the Company's operating costs and reduce customer utilization of airfreight.
FAA rules for Flightcrew Member Duty and Rest Requirements (FMDRR) for passenger airline operations became effective in January 2014. The rules apply to our operation of passenger and combi aircraft for the DoD and other customers and impact the required amount and timing of rest periods for pilots between work assignments and modified duty and rest requirements based on the time of day, number of scheduled segments, flight types, time zones and other factors. Failure to remain in compliance with these rules may subject us to fines or other enforcement action.
There are separate crew rest requirements applicable to all-cargo aircraft of the type operated by the Company. The FAA has rejected, as have the courts, an attempt to apply the passenger airline crew rest rules to all-cargo operations. If such rest requirements and restrictions were imposed on our cargo operations, these rules could have a significant impact on the costs incurred by our airlines. The airlines would attempt to pass such additional costs through to their customers in the form of price increases. Customers, as a result, may seek to reduce their utilization of aircraft in favor of less expensive transportation alternatives.
The National Mediation Board could determine that two or more of the Company's airline subsidiaries constitute a single transportation system.
During 2017, the National Mediation Board ("NMB") ruled that ABX and ATI do not constitute a single transportation system for the purposes of collective bargaining. The NMB could reconsider whether the airlines constitute a single transportation system and require that the ABX and ATI crewmembers, or that the ABX, ATI and OAI crewmembers, be represented by the same union. A single transportation system determination by the NMB could give rise to complex contractual issues, including integrating the airlines' seniority lists, and materially impact the dynamics with respect to future collective bargaining agreement ("CBA") negotiations. While it is unlikely that the NMB would reconsider or find that ABX and ATI, or that ABX, ATI and OAI, constitute a single transportation system, the case-by-case analysis used by the NMB makes such predictions uncertain. Such a finding could have material adverse consequences to the Company.
We may be impacted by government requirements associated with transacting business in foreign jurisdictions and trade policies.
The U.S. and other governments have imposed trade and economic sanctions in certain geopolitical areas and on certain organizations and individuals. The U.S. Departments of Justice, Commerce and Treasury, as well as other government agencies have a broad range of civil and criminal penalties they may seek to impose for violations of the Foreign Corrupt Practices Act (“FCPA”) or other regulations, including sanctions administered by the OFAC. In addition, the DOT, FAA and TSA may at times limit the ability of our airline subsidiaries to conduct flight operations in certain areas of the world. Under such laws and regulations, we may be obliged to limit our business activities, incur additional costs for compliance programs and may be subject to enforcement actions or penalties for noncompliance. In recent years, the U.S. government has increased its oversight and enforcement activities with respect to these laws and the relevant agencies may continue to increase these activities.
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Any trade agreements that may be entered into are subject to a number of uncertainties, including the imposition of new tariffs or adjustments and changes to the products covered by existing tariffs. The impact of new laws, regulations and policies that affect global trade cannot be predicted.
Penalties, fines and sanctions levied by governmental agencies or the costs of complying with government regulations could negatively affect our results of operations.
The operations of the Company’s subsidiaries are subject to complex aviation, transportation, security, environmental, labor, employment and other laws and regulations. These laws and regulations generally require our subsidiaries to maintain and comply with terms of a wide variety of certificates, permits, licenses and other approvals. Their inability to maintain required certificates, permits or licenses, or to comply with applicable laws, ordinances or regulations could result in substantial fines or, in the case of DOT and FAA requirements, possible suspension or revocation of their authority to conduct operations.
The costs of maintaining our aircraft in compliance with government regulations could negatively affect our results of operations and require further investment in our aircraft fleet.
Manufacturer Service Bulletins, FAA regulations and FAA Airworthiness Directives issued under its “Aging Aircraft” program cause our airlines, as operators of older aircraft, to be subject to additional inspections and modifications to address problems of corrosion and structural fatigue at specified times. The FAA may issue airworthiness directives that could require significant costly inspections and major modifications to such aircraft. The FAA may issue airworthiness directives that could limit the usability of certain aircraft types.
In addition, FAA regulations require that aircraft manufacturers establish limits on aircraft flight cycles to address issues involving aging, but still economically viable, aircraft, as described in Item 1 of this report, under "Federal Aviation Administration." These regulations may increase our maintenance costs and eventually limit the use of our aircraft. See Item 2 of this report, "Properties," for a description of the company's aircraft, including year of manufacture.
The FAA and ICAO are in the process of developing programs to modernize air traffic control and management systems. The FAA's program, Next Generation Air Transportation Systems, is an integrated system that requires updating aircraft navigation and communication equipment. The FAA has mandated the replacement of current ground based radar systems with more accurate satellite based systems on our aircraft. The ICAO began phasing in similar requirements for aircraft operating in Europe during 2015. These programs may increase our costs and limit the use of our aircraft. Aircraft not equipped with advanced communication systems may be restricted to certain airspace.
The Company may be negatively affected by global climate change or by legal, regulatory or market responses to such climate change.
The Company is subject to the regulations of the EPA and state and local governments regarding air quality and other matters. In part, because of the highly industrialized nature of many of the locations where the Company operates, there can be no assurance that we have discovered all environmental contamination or other matters for which the Company may have or share responsibility.
Concern over climate change, including the impact of global warming, has led to significant federal, state and international legislative and regulatory efforts to limit greenhouse gas ("GHG") emissions. The European Commission has mandated the extension of the European Union Emissions Trading Scheme ("ETS") for GHG emissions to the airline industry. Under the European Union ETS, all ABX, ATI and OAI flights that are wholly within the European Union are now covered by the ETS requirements, and each year we are required to submit emission allowances in an amount equal to the carbon dioxide emissions from such flights. If we exceed the airlines' emission allowances, we will be required to purchase additional emission allowances on the open market.
Similarly, in 2016, the International Civil Aviation Organization (“ICAO”) passed a resolution adopting the Carbon Offsetting and Reduction Scheme for International Aviation (“CORSIA”), which is a global, market-based emissions offset program to encourage carbon-neutral growth beyond 2020. A pilot phase began in 2021, in which countries may voluntarily participate, followed by a first phase of the program beginning in 2024 that is also voluntary, and full mandatory participation is scheduled to begin in 2027. The United States has agreed to participate in the two voluntary phases. ICAO continues to develop details regarding implementation, but compliance with CORSIA will increase our operating costs.
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The U.S. Congress and certain states have also considered legislation regulating GHG emissions. In addition, even in the absence of such legislation, the EPA has sought to regulate GHG emissions, especially aircraft engine emissions. In July 2016, the EPA issued a finding that aircraft engine emissions cause or contribute to air pollution that may reasonably be anticipated to endanger public health. This finding is a regulatory prerequisite to the EPA’s adoption of a new certificate standard for aircraft emissions. In January 2021, the EPA issued a final rule regarding GHG emissions standards for new aircraft engines consistent with ICAO standards that were adopted in 2017. The EPA final rule does not apply to engines on aircraft that are already in service, as is also the case with the ICAO standards. However, President Biden's Administration has stated that it plans to review the EPA emissions standards issued by the prior Administration and, further, the EPA standards have been challenged by several states and environmental organizations. We cannot predict the results of the Biden Administration's review or the outcome of legal challenges to the EPA's final rules. The U.S. also recently re-entered the Paris climate accord, an agreement among 196 countries to reduce GHG emissions, and the effect of the U.S. re-entering the Paris climate accord on future U.S. policy regarding GHG emissions, on CORSIA and on other GHG regulations is uncertain. The extent to which the U.S. and other countries implement the agreement could have an adverse impact on our Company.
The cost to comply with new and potential environmental laws and regulations could be substantial for the Company. These costs could include an increase in the cost of fuel and capital costs associated with updating aircraft, among other things. We cannot predict the effect on the Company’s cost structure or operating results of complying with future environmental laws and regulations in the U.S. and in foreign jurisdictions until the timing, scope and extent of such laws and regulations becomes better known. Further, even without such legislation or regulation, increased awareness and adverse publicity in the global marketplace about greenhouse gas emitted by companies in the airline and transportation industries could harm our reputation and reduce demand for our services.
We are required to safeguard proprietary information and sensitive or confidential data, including personal information of customers, employees and others.
To conduct our operations, we regularly move data across national borders, and consequently we are subject to a variety of continuously evolving and developing laws and regulations in the United States and abroad regarding privacy, data protection and security. The scope of the laws that may be applicable to us is often uncertain and may be conflicting, particularly with respect to foreign laws. GDPR, which greatly increases the jurisdictional reach of European Union law and adds a broad array of requirements for handling personal data, including the public disclosure of significant data breaches, became effective in May 2018. Other countries and states have enacted or are enacting privacy and data localization laws that require data to stay within their borders. All of these evolving compliance and operational requirements impose significant costs that are likely to increase over time.
Operational Risk
Our operating results will continue to be impacted by the coronavirus pandemic.
The COVID-19 pandemic has had an adverse impact on our operations and financial results and is expected to continue to affect our operations and financial results. The extent of the impact that the coronavirus pandemic will have on our future operations and financial results will depend on future developments, including: the duration, spread, severity and any recurrence of the COVID-19 virus; vaccination rates, the effectiveness of vaccines, the duration and scope of government orders and local restrictions; and the extent of the continued impact of the pandemic on overall economic conditions.
We expect that our operating results will continue to be negatively impacted by the coronavirus pandemic at least during 2022. Since February of 2020, the DoD has reduced normal personnel movements while most of our other passenger service customers suspended or reduced their operations and demand for commercial passenger charters significantly declined. The economic downturn resulting from the coronavirus pandemic also has a detrimental impact on the demand for other types of services including aircraft maintenance services.
Most recently, on September 9, 2021, President Biden issued an Executive Order (EO) requiring federal contractors, which includes ABX, ATI and OAI, to require their employees to be vaccinated against COVID-19 by a certain date. The validity of the EO has been challenged by some federal contractors, and it has been stayed in some jurisdictions by lower federal courts at this time. While many of the Company’s employees are vaccinated against COVID-19 as of this date, were the EO to be allowed by the courts to take effect, this would pose new cost and employee relations issues for the Company and could impact operations.
Our airline operations rely on flight crews, aircraft maintenance technicians, flight support personnel and aircraft loading personnel. Maintaining the health of our employees during the pandemic is essential for us to
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operate safely and maintain customers' networks. We have added extra precautions and redundancies related to crew reserves, employee travel protocols, sanitation and other measures. However, flight delays and the additional costs associated with such precautions and redundancies could become significant. We rely on a skilled workforce to perform scheduled aircraft maintenance. We staff personnel near airports to sort customer packages, load aircraft and maintain related equipment. A coronavirus outbreak at one of our maintenance facilities, or at customer sorting centers could result in workforce shortages and facility closures.
Inflation may outpace customer rate increases.
General inflation in the United States in late 2021 spiked to levels not experienced in recent decades. Although a large portion of our operating costs are contractual with escalation clauses, a portion of our costs are subject to inflationary pressures. Salaries, wages and contract labor rates of individuals may come under inflationary pressures to keep up with market demands. We have, and may continue to experience increased costs to retain and attract employees. Additionally our parts, materials and shipping costs may increase. While our customer contracts may have price escalation clauses, continued inflationary pressure on our cost may be more than the price increases we can charge to our customers. Elevated inflation rates for a prolonged period of time, without the ability to increase our prices at a similar rate, may negatively impact our financial results.
Our costs incurred in providing airline services could be more than the contractual revenues generated.
Each airline develops business proposals for the performance of ACMI, CMI, charter and other services for its customers, crew productivity and maintenance expenses. Projections contain key assumptions, including maintenance costs, flight hours, aircraft reliability, crewmember productivity and crewmember compensation and benefits. We may overestimate revenues, the level of crewmember productivity, and/or underestimate the actual costs of providing services when preparing business proposals. If actual costs are higher than projected or aircraft reliability is less than expected, future operating results may be negatively impacted.
The concentration of aircraft types and engines in the Company's airlines could adversely affect our operating and financial results.
Our combined aircraft fleet is currently concentrated in three aircraft types. If any of these aircraft types encounter technical difficulties that result in significant FAA airworthiness directives or grounding, our ability to lease the aircraft would be adversely impacted, as would our airlines' operations.
The cost of aircraft repairs and unexpected delays in the time required to complete aircraft maintenance could negatively affect our operating results.
Our airlines provide flight services throughout the world, sometimes operating in remote regions. Our aircraft may experience maintenance events in locations that do not have the necessary repair capabilities or are difficult to reach. As a result, we may incur additional expenses and lose billable revenues that we would have otherwise earned. Under certain customer agreements, we are required to provide a spare aircraft while scheduled maintenance is completed. If delays occur in the completion of aircraft maintenance, we may incur additional expense to provide airlift capacity and forgo revenues.
Our operating results could be adversely impacted by negotiations regarding collective bargaining agreements ("CBAs") with flight crewmember representatives.
The flight crewmembers for each of the Company's airlines are unionized. ABX and OAI's crewmembers are represented by the International Brotherhood of Teamsters ("IBT") while ATI's crewmembers are represented by the Air Line Pilots Association ("ALPA"). During the negotiation of CBA amendments, the airline and the union are each required to maintain the status quo of the CBA; neither the airline nor the union may engage in a lock-out, strike or other self-help until such time as they are released from further negotiations by the mediator for the National Mediation Board, and after the conclusion of a mandatory 30-day “cooling off” period. It is rare for mediators to declare an impasse and release the parties. Instead, the NMB prefers to require the parties to remain in negotiations until such time as they come to an agreement. Despite this process, it's possible for disruptions in customer service to occur from time to time, resulting in increased costs for the airline and monetary penalties under certain customer agreements if monthly reliability thresholds are not achieved. Further, if we do not maintain minimum reliability thresholds over an extended period of time, we could be found in default of one or more customer agreements.
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Contract negotiations with a union could result in reduced flexibility for scheduling crewmembers and higher operating costs for the airlines, making the Company's airlines less competitive. If amendments to a CBA increases our costs and we cannot recover such increases, our operating results would be negatively impacted. In such event, it may be necessary for us to terminate customer contracts or curtail planned growth.
The rate of aircraft deployments may impact the Company’s operating results and financial condition.
Our future operating results and financial condition will depend in part on our subsidiaries’ ability to successfully deploy aircraft in support of customers' operations while generating a positive return on investment. Our success will depend, in part, on our customers' ability to secure additional cargo volumes, in both U.S. and international markets. Deploying aircraft in international markets can pose additional risks, costs and regulatory requirements which could result in periods of delayed deployments. Deploying an aircraft into service typically requires various approvals from the FAA. Aircraft deployments could be delayed if such FAA approvals are delayed.
We may fail to meet the scheduled delivery date for aircraft required by customer agreements.
If CAM cannot meet the agreed delivery schedule for an aircraft lease, the customer may have the right to cancel the aircraft lease, thus delaying revenues until the aircraft can be completed and re-marketed successfully and exposing CAM to potential liability to the original customer.
Our airline operating agreements include on-time reliability requirements which can impact the Company's operating results and financial condition.
Certain of our airline operating agreements contain monthly incentive payments for reaching specific on-time reliability thresholds. Additionally, such airline operating agreements contain monetary penalties for aircraft reliability below certain thresholds. As a result, our operating revenues may vary from period to period depending on the achievement of monthly incentives or the imposition of penalties. Further, an airline could be found in default of an agreement if it does not maintain minimum thresholds over an extended period of time. If our airlines are placed in default due to the failure to maintain reliability thresholds, the customer may elect to terminate all or part of the services we provide under certain customer agreements after a cure period.
If ABX fails to maintain aircraft reliability above a minimum threshold under the restated CMI agreement with DHL for two consecutive calendar months or three months in a rolling twelve-month period, we would be in default of the restated CMI agreement with DHL. In that event, DHL may elect to terminate the restated CMI agreement, unless we maintain the minimum reliability threshold during a 60-day cure period. If DHL terminates the CMI agreement due to an ABX event of default, we would be subject to a monetary penalty payable to DHL.
If our airlines fail to maintain aircraft reliability above a minimum threshold under the ATSA with ASI for either a specified number of consecutive calendar months or a specified number of calendar months (whether or not consecutive) in a specified trailing period, we could be held in default. In that event, ASI may elect to terminate the ATSA and pursue those rights and remedies available to it at law or in equity.
If OAI fails to maintain reliability above a minimum threshold under its contract with the DoD with respect to the flight segments flown during a given month, we could be held in default. In that event, the DoD may elect to terminate the contract. In addition, missions that experience carrier controllable delays are subject to monetary penalties. Depending on the delay interval, the compensation paid to OAI for the performance of the services can be reduced by a specified percentage amount.
Customers and Market Risk
The COVID-19 pandemic may have a long term impact on the demand for aviation services and our operating results.
Due to the COVID-19 pandemic, passenger air travel has declined sharply and many passenger airlines have temporarily removed a significant portion of their aircraft from service. The demand for passenger air travel could remain low for an extended period of time and accordingly. If the COVID-19 pandemic persists or reemerges, our expectations of related operating cash flows could significantly decline. If such circumstances occur or appear likely to occur, we may need to impair the carrying value of certain recorded assets. If the coronavirus pandemic persists, we may need to terminate or furlough airline employees.

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A limited number of key customers are critical to our business and the loss of one or more of such customers could materially adversely affect our business, results of operations and financial condition.
Our business is dependent on a limited number of key customers. There is a risk that any one of our key customers may not renew their contracts with us on favorable terms or at all, perhaps due to reasons beyond our control. As discussed in the risk factor below, certain key customers have the ability to terminate their agreements in advance of the expiration date.
The actual demand for Boeing 777, 767, 757 and Airbus A321 aircraft may be less than we anticipate. Customers may develop preferences for the Airbus A300-600 and A330 aircraft or other mid-size aircraft types, instead of the Boeing 777, 767 and 757 aircraft that are in our fleet. The actual lease rates for aircraft available for lease may be less than we projected, or new leases may start later than we expect. Further, other airlines and lessors may be willing to offer aircraft to the market under terms more favorable to lessees.
Under the terms of our airline operating and aircraft lease agreements, customers may be able to terminate the agreements prior to their expiration date.
Customers can typically terminate for convenience one or more of the aircraft we operate for them under an airline operating agreement at any time during the term, subject to a 60-day notice period and paying the Company a fee. Additionally, the lease agreements may contain provisions for terminating an aircraft lease for convenience, including a notice period and paying a lump sum amount to the Company.
ASI may terminate the ATSA in its entirety after providing 180 days of advance notice and paying to the Company a termination fee which reduces over the term of the agreement.
DHL may terminate the CMI agreement in its entirety after providing 180 days of advance notice and paying a termination fee which amortizes down during the term of the agreement.
The DoD may not renew our contracts or may reduce the number of routes that we expect to operate.
Our contracts with the DoD are typically for one year and are not required to be renewed. The DoD may terminate the contracts for convenience or in the event we were to fail to satisfy reliability requirements or for other reasons. The number and frequency of routes is sensitive to changes in military priorities and U.S. defense budgets.
The majority of OAI's business currently consists of flights chartered by the DoD for the transportation of DoD personnel and a significant amount of ATI's revenue is derived from flights for the DoD. A downturn in the DoD's need for such services could adversely affect our operating results.
Lessees of our aircraft may fail to make contractual payments or fail to maintain the aircraft as required.
Our financial results depend in part on our lease customers' ability to make lease payments and maintain the related aircraft. Our customers' ability to make payments could be adversely impacted by changes to their financial liquidity, competitiveness, economic conditions and other factors. A default of an aircraft lease by a customer could negatively impact our operating results and cash flows and result in the repossession of the aircraft.
While we often require leasing customers to pay monthly maintenance deposits, customers are normally responsible for maintaining our aircraft during the lease term. Failure of a customer to perform required maintenance and maintain the appropriate records during the lease term could result in higher maintenance costs, a decrease in the value of the aircraft, a lengthy delay in or even our inability to redeploy the aircraft in a subsequent lease, any of which could have an adverse effect on our results of operations and financial condition.
The economic conditions in the U.S. and in other markets may negatively impact the demand for the Company’s aircraft and services.
Air transportation volumes are strongly correlated to general economic conditions, including the price of aviation fuel. An economic downturn could reduce the demand for delivery services offered by DHL, ASI and other delivery businesses, in particular expedited shipping services utilizing aircraft, as well as the demand for the chartered passenger flights OAI operates. Further, during an economic slowdown, cargo customers generally prefer to use ground-based or marine transportation services instead of more expensive air transportation services. Accordingly, an economic downturn could reduce the demand for airlift and aircraft leases.
Additionally, if the price of aviation fuel rises significantly, the demand for aircraft and air transportation services may decline. During periods of downward economic trends and rising fuel costs, freight forwarders and
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integrated delivery businesses are more likely to defer market expansion plans. When the cost of air transportation increases, the demand for passenger transportation may decline.
On occasion, declines in demand may stem from other uncontrollable factors such as geopolitical tensions or conflicts, trade embargoes or tariffs, and human health crises. We may experience delays in the deployment of available aircraft with customers under lease, ACMI or charter arrangements and our revenues may be adversely affected.
Customer demand for aircraft maintenance facilities could negatively impact our financial results.
We lease and operate a 310,000 square foot, three-hangar aircraft maintenance facility and a 100,000 square foot component repair shop in Wilmington, Ohio. Additionally, we lease and operate a 311,500 square foot, two-hangar aircraft maintenance complex in Tampa, Florida. Accordingly, a large portion of the operating costs for our aircraft maintenance and conversion business are fixed. As a result, we need to retain existing aircraft maintenance business levels to maintain a profitable operation. The actual level of revenues may not be sufficient to cover our operating costs. Additionally, revenues from aircraft maintenance can vary among periods due to the timing of scheduled maintenance events and the completion level of work during a period.
Strategic investments in other businesses may not result in the desired benefits.
We enter into joint venture and other business acquisition and investment agreements from time to time with the expectation that such investments will result in various benefits including revenue growth through geographic diversification and product diversification, improved cash flows and better operating efficiencies. Achieving the anticipated benefits from such agreements is subject to a number of challenges and uncertainties. The expected benefits may be only partially realized or not at all, or may take longer to realize than expected, which could adversely impact our financial condition and results of operations. We may make additional capital contributions to these businesses.
Risk Related to Business Interruptions and Cybersecurity Incidents
Our operating results have been and will continue to be impacted by the COVID-19 pandemic
Some of our employees and employees of suppliers and service providers have tested positive for, or have been suspected of having, COVID-19. Additional instances of actual or perceived risk of infection among our employees, or our suppliers' or service providers’ employees, could further negatively impact our operations. We rely on a skilled workforce to perform aircraft maintenance. Similarly, we staff personnel near airports to sort customer packages, load aircraft and maintain related equipment. In addition to our own employees, we rely on services from suppliers and customers to operate efficiently and safely. Measures restricting the ability of airport personnel or flight crews to work may result in flights reductions. Our operations could be negatively affected if our own personnel or those of our suppliers and customers are quarantined or sickened as a result of exposure to COVID-19, or if they are subject to governmental curfews or “shelter in place” health orders. A COVID-19 outbreak at certain maintenance facilities, customer sorting centers or airports could result in workforce shortages or closures causing reduced revenues and higher expenses.
In addition to workforce shortages, the COVID-19 pandemic may result in parts shortages, maintenance delays, shortages of transportation and hotel accommodations for flight crews, any of which could result in reduced revenues and additional expenses. Similarly, the effects of the COVID-19 pandemic could result in the slower completion of aircraft freighter conversions which in turn would disrupt our aircraft leasing operations. Our customer base for aircraft maintenance revenues includes passenger airlines. Our operating results have been and may continue to be adversely impacted by the COVID-19 pandemic as passenger airlines reduce their needs for scheduled heavy airframe maintenance.
The Company's operating results could be negatively impacted by disruptions of its information technology and communication systems and data breaches.
Our businesses depend heavily on information technology, computerized systems and data transmissions to operate effectively. We continue to expand our reliance on third party providers for technical support, management,and hosting of systems. The Company's systems and technologies, or those of third parties on which we rely, could fail or become unreliable due to equipment failures, software viruses, ransomware attacks, malware attacks, cyberattacks, natural disasters, power failures, telecommunication outages, or other causes. Hackers,
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foreign governments, cyber-terrorists and cyber-criminals, acting individually or in coordinated groups, may launch distributed denial of service attacks or other coordinated attacks that may cause service outages, gain inappropriate or block legitimate access to systems or information, or result in other interruptions to our business. In addition, the foregoing breaches in security could expose us and our customers, or the individuals affected, to a risk of loss, disclosure or misuse of proprietary information and sensitive or confidential data, including personal information of customers, employees and others. Certain disruptions could prevent our airlines from flying as scheduled, possibly for an extended period of time, which could have a negative impact on our financial results and operating reliability. A cybersecurity attack or system outage could limit our ability to conduct some operations or result in the complete shutdown of all of our operations. A cybersecurity attack impacting onboard or other flight systems could result in an accident or operational disruptions, which could adversely affect our reputation, regulatory oversight and financial position.
We continually monitor the risks of disruption, take preventative measures, develop backup plans and maintain redundancy capabilities. The measures we use may not prevent the causes of disruptions we could experience or help us recover failed systems quickly.
We depend on and interact with the information technology networks and systems of third parties for some aspects of our business operations, including our customers and service providers, such as cloud service providers. These third parties may have access to information we maintain about our company, operations, customers, employees and vendors, or operating systems that are critical to or can significantly impact our business operations. Like us, these third parties are subject to risks imposed by data breaches and IT systems disruptions like those described above, and other events or actions that could damage, disrupt or close down their networks or systems. Security processes, protocols and standards that we have implemented and contractual provisions requiring security measures that we may have sought to impose on such third parties may not be sufficient or effective at preventing such events. These events could result in unauthorized access to, or disruptions or denials of access to, misuse or disclosure of, information or systems that are important to our business, including proprietary information, sensitive or confidential data, and other information about our operations, customers, employees and suppliers, including personal information. Any of these events that impact our information technology networks or systems, or those of customers, service providers or other third parties, could result in disruptions in our operations, the loss of existing or potential customers, damage to our brand and reputation, regulatory scrutiny, and litigation and potential liability for us.
Our systems are subject to evolving cyber security threats. Our exposure to cyber risk also increases as we expand the number of airports and locations within our operations, as well as the number of employees working from remote locations. The costs of maintaining safeguards, recovery capabilities and preventive measures may continue to rise. Further, the costs of recovering or replacing a failed system could be very expensive.
Among other consequences, our customers’ confidence in our ability to protect data and systems and to provide services consistent with their expectations could be negatively impacted, further disrupting our operations. Similarly, an actual or alleged failure to comply with applicable U.S. or foreign data protection regulations or other data protection standards may expose us to litigation, fines, sanctions or other penalties. As regulations and expectations evolve, we may incur significant costs to upgrade and bring our systems and processes into compliance.
Severe weather or other natural or man-made disasters and epidemics could adversely affect our business.
Severe weather conditions and other natural or man-made disasters, including storms, floods, fires or earthquakes, epidemics or pandemics, conflicts or unrest, or terrorist attacks, may result in decreased revenues, as our customers reduce their transportation needs, or increased costs to operate our business, which could have a material adverse effect on our results of operations for a quarter or year. Any such event affecting one of our major facilities could result in a significant interruption in or disruption of our business.
Third-Party Reliance Risk
We rely on third parties to modify aircraft and provide aircraft and engine maintenance.
We rely on third party aircraft modification service providers and aircraft and engine maintenance service providers that have expertise or resources that we do not have. Third party service providers may seek to impose price increases that could negatively affect our competitiveness in the airline markets. An unexpected termination or delay involving service providers could have a material adverse effect on our operations and financial results. A delay in an aircraft modification could adversely impact our revenues and our ability to place the aircraft in the
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market. We must manage third party service providers to meet schedules and turn-times and to control costs in order to remain competitive to our customers.
We rely on a limited number of engine maintenance providers for our engines that power our fleet of Boeing 767 aircraft. If our providers do not complete the refurbishment of our engines within the contractual turn-times or if an unplanned replacement of a maintenance provider is required due to the deterioration of their performance or some other reason, our operations and financial results may be adversely impacted.
Financial Risk
Our Senior Credit Agreement and our Senior Notes include covenants that could limit our operating and financial flexibility.
The Senior Credit Agreement contains covenants including, among other requirements, limitations on certain additional indebtedness and guarantees of indebtedness.  The Senior Credit Agreement is collateralized by certain of the Company's Boeing 777, 767 and 757 aircraft.  Under the terms of the Senior Credit Agreement, the Company is required to maintain aircraft collateral coverage equal to 125% of the outstanding balance of the revolving credit facility.  Our Senior Notes and related Indenture also include a number of restrictions and covenants including limitations on our ability to incur additional indebtedness, grant liens, make investments, repurchase or redeem capital stock, pay dividends, enter into transactions with affiliates, merge with other entities or transfer or sell assets.  The covenants under the Senior Notes, which are generally no more restrictive than those set forth in the Senior Credit Agreement, are subject to exceptions and qualifications as described in the Indenture. Complying with these covenants in the Senior Credit Agreement and the Senior Notes may impair our ability to finance our operations or capital needs or to take advantage of other business opportunities. Our ability to comply with these covenants will depend on our future performance, which may be affected by events beyond our control. Our failure to comply with these covenants would represent an event of default. An event of default under the Senior Credit Agreement or the Senior Notes could result in all indebtedness thereunder being declared due and payable immediately.
Operating results may be affected by fluctuations in interest rates.
We enter into interest rate derivative instruments from time to time in conjunction with our debt levels. We typically do not designate the derivative instruments as hedges for accounting purposes. Future fluctuations in LIBOR (and its pending replacement) will result in the recording of gains and losses on interest rate derivatives that the Company holds.
Under the Senior Credit Agreement, interest rates are adjusted monthly based on the prevailing LIBOR rates and may be adjusted at any time for prime rates and a ratio of the Company's outstanding debt level to earnings before interest, taxes, depreciation and amortization expenses ("EBITDA"). At the Company's current debt-to-EBITDA ratio, the revolving credit facility bears variable interest rates of 1.11% per annum. Additional debt or lower EBITDA may result in higher interest rates on the variable rate portion of the Company's debt.
The Company sponsors defined benefit pension plans and post-retirement healthcare plans for certain eligible employees. The Company's related pension expense, the plans' funded status and funding requirements are sensitive to changes in interest rates. The plans' funded status and annual pension expense are recalculated at the beginning of each calendar year using the fair value of plan assets and market-based interest rates at that point in time, as well as assumptions for asset returns and other actuarial assumptions. Future fluctuations in interest rates, including the impact on asset returns, could result in the recording of additional expense and require additional contributions for pension and other post-retirement healthcare plans.
The costs of insurance coverage or changes to our reserves for self-insured claims could affect our operating results and cash flows.
The Company is self-insured for certain claims related to workers’ compensation, aircraft, automobile, general liability and employee healthcare. We record a liability for reported claims and an estimate for incurred claims that have not yet been reported. Accruals for these claims are estimated utilizing historical paid claims data and recent claims trends. Changes in claim severity and frequency could negatively impact our results of operations and cash flows.
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The Company's future earnings and earnings per share, as reported under generally accepted accounting principles, will be impacted by the Amazon stock warrants.
The Amazon warrants are subject to fair value measurements during periods that they are outstanding. Accordingly, future fluctuations in the fair value of the warrants are expected to adversely impact the Company's reported earnings measures from time to time. See Note C in the accompanying consolidated financial statements of this report for further information about warrants.
If Amazon exercises its right to acquire shares of our common stock pursuant to the outstanding warrants held by it, such exercise will dilute the ownership interests of our then-existing stockholders and could adversely affect the market price of our common stock.
If Amazon exercises its right to acquire shares of our common stock pursuant to the warrants, it will dilute the ownership interests of our then-existing stockholders and reduce our earnings per share. In addition, any sales in the public market of any common stock issuable upon the exercise of the warrants by Amazon could adversely affect prevailing market prices of our common stock.
Changes in the fair value of certain financial instruments could impact the financial results of the Company.
Certain financial instruments are subject to fair value measurements at the end of each reporting period. Accordingly, future fluctuations in their fair value may adversely impact the Company's reported earnings. See Note D in the accompanying consolidated financial statements of this report for further information about the fair value of our financial instruments.
The ability to use net operating loss carryforwards to offset future taxable income for U.S. federal income tax purposes may be further limited.
Limitations imposed on our ability to use net operating losses (“NOLs”) to offset future taxable income could cause U.S. federal income taxes to be paid earlier than otherwise would be paid if such limitations were not in effect and reduce the benefit of those NOLs. Similar rules and limitations may apply for state income tax purposes.
Changes in the ownership of the Company on the part of significant shareholders could limit our ability to use NOLs to offset future taxable income. In general, under Section 382 of the Internal Revenue Code of 1986, as amended (the “Code”), a corporation that undergoes an “ownership change” is subject to limitations on its ability to utilize its pre-change NOLs to offset future taxable income. In general, an ownership change occurs if the aggregate stock ownership of significant stockholders increases by more than 50 percentage points over such stockholders’ lowest percentage ownership during the testing period (generally three years).
The convertible note hedge transactions and the warrant transactions that we entered into in September 2017 may affect the value of our common stock.
In connection with the pricing of our 1.125% senior convertible notes due 2024 (the "Convertible Notes") and the exercise by the initial purchasers of their option to purchase additional Convertible Notes, we entered into privately-negotiated convertible note hedge transactions with the hedge counterparties. The convertible note hedge transactions cover, subject to customary anti-dilution adjustments, the number of shares of common stock that initially underlie the Convertible Notes. We also entered into separate, privately-negotiated warrant transactions with the hedge counterparties relating to the same number of shares of our common stock that initially underlie the Convertible Notes, subject to customary anti-dilution adjustments.
The hedge counterparties and/or their affiliates may modify their hedge positions with respect to the Convertible Note hedge transactions and the warrant transactions from time to time. They may do so by purchasing and/or selling shares of our common stock and/or other securities of ours, including the Convertible Notes in privately-negotiated transactions and/or open-market transactions or by entering into and/or unwinding various over-the-counter derivative transactions with respect to our common stock. The hedge counterparties are likely to modify their hedge positions during any observation period for the Convertible Notes.
The effect, if any, of these activities on the market price of our common stock will depend on a variety of factors, including market conditions, and cannot be determined at this time. Any of these activities could, however, adversely affect the market price of our common stock. In addition, the hedge counterparties and/or their affiliates may choose to engage in, or to discontinue engaging in, any of these transactions with or without notice at any time, and their decisions will be at their sole discretion and not within our control.
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We are subject to counterparty risk with respect to the Convertible Note hedge transactions. The hedge counterparties are financial institutions, and we will be subject to the risk that they might default under the Convertible Note hedge transactions. Our exposure to the credit risk of the hedge counterparties is unsecured by any collateral. Global economic conditions have from time to time resulted in failure or financial difficulties for many financial institutions. If a hedge counterparty becomes subject to insolvency proceedings, we will become an unsecured creditor in those proceedings with a claim equal to our exposure at that time under our transactions with that hedge counterparty. Our exposure will depend on many factors but, generally, the increase in our exposure will be correlated to the increase in the market price and volatility of our common stock. In addition, upon a default by a hedge counterparty, we may suffer adverse tax consequences and more dilution than we currently anticipate with respect to our common stock. We can provide no assurances as to the financial stability or viability of any hedge counterparty.
Conversion of the Convertible Notes or exercise of the warrants may dilute the ownership interest of stockholders. Any sales in the public market of the common stock issuable upon such conversion of the Convertible Notes or such exercise of the warrants could adversely affect prevailing market prices of our common stock. In addition, the existence of the Convertible Notes may encourage short selling by market participants because the conversion of the Convertible Notes could depress the price of our common stock.
We may need to reduce the carrying value of the Company’s assets.
The Company owns a significant amount of aircraft, aircraft parts and related equipment. Additionally, the balance sheet reflects assets for income tax carryforwards and other deferred tax assets. The removal of aircraft from service or continual losses from aircraft operations could require us to evaluate the recoverability of the carrying value of those aircraft, related parts and equipment and record an impairment charge through earnings to reduce the carrying value.
We have recorded goodwill and other intangible assets related to acquisitions and equity investments. If we are unable to achieve the projected levels of operating results, it may be necessary to record an impairment charge to reduce the carrying value of goodwill, equity investments and related intangible assets. Similarly, if we were to lose a key customer or one of our airlines were to lose its authority to operate, it could be necessary to record an impairment charge.
If the Company incurs operating losses or our estimates of expected future earnings indicate a decline, it may be necessary to reassess the need for a valuation allowance for some or all of the Company’s net deferred tax assets.

ITEM 1B. UNRESOLVED STAFF COMMENTS
None.

ITEM 2. PROPERTIES
We lease portions of an air park in Wilmington, Ohio, under lease agreements with a regional port authority, the terms of which expire in June 2026 and June 2036 with options to extend. The leases include corporate offices, 310,000 square feet of maintenance hangars and a 100,000 square foot component repair shop at the air park. We also have the non-exclusive right to use the Wilmington airport, which includes one active runway, taxiways and ramp space. We also lease and operate a 311,500 square foot, two hangar aircraft maintenance complex at the Tampa International Airport in Florida. We lease approximately 82,500 square feet of office and warehouse space at the Tulsa International Airport in Oklahoma. We lease a facility having approximately 335,000 square feet in Chicago, Illinois and another facility having approximately 100,000 square feet in Orlando, Florida for our USPS mailing handling contracts. In addition, we lease smaller maintenance stations, offices and ramp space at certain airport and regional locations, typically on a short-term basis. Further, we lease warehousing space inside or near certain U.S. airports to support our customers' parcel handling requirements.

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As of December 31, 2021, our in-service aircraft fleet consisted of 107 owned aircraft and ten aircraft leased from external companies. The majority of these aircraft were formerly passenger aircraft that have been modified for cargo operations. These cargo aircraft are generally described as being mid-size or having medium wide-body cargo capabilities. The cargo aircraft carry gross payloads ranging from approximately 47,900 to 129,000 pounds. These cargo aircraft are well suited for intra-continental flights and medium range inter-continental flights. The table below shows the combined fleet of aircraft in service condition.
 In-service Aircraft as of December 31, 2021
Aircraft TypeTotalOwnedOperating LeaseYear of
Manufacture
Gross Payload
(Lbs.)
Still Air Range
(Nautical Miles)
767-200 SF (1)333121982 - 198785,000 - 100,0001,700 - 5,300
767-200 Passenger321200163,000 - 73,0006,500 - 7,600
767-300 SF (1)656141988 - 1999121,000 - 129,0003,200 - 7,100
767-300 Passenger9631993 - 200285,000 - 99,7006,300 - 7,200
777-200 Passenger332004 - 2007119,500 - 123,9008,700 - 9,500
757-200 Combi (2)441989 - 199258,0002,600 - 4,300
Total in-service11710710
____________________
(1)These aircraft are configured for standard cargo containers loaded through large standard main deck cargo doors.
(2)These aircraft are configured as “combi” aircraft capable of simultaneously carrying passengers and cargo containers on the main deck.
CAM also owns twelve Boeing 767-300 aircraft and one Airbus A321-200 aircraft which were undergoing or preparing to undergo modification to a standard freighter configuration and are expected to be completed in 2022 or 2023.
We believe that our existing facilities and aircraft fleet are appropriate for our current operations. As described in Note H to the accompanying financial statements of this report, we plan to invest in additional aircraft to meet our growth plans. We may make additional investments in aircraft and facilities if we identify favorable opportunities in the markets that we serve.

ITEM 3. LEGAL PROCEEDINGS
We are currently a party to legal proceedings in various federal and state jurisdictions arising out of the operation of the Company's business. The amount of alleged liability, if any, from these proceedings cannot be determined with certainty; however, we believe that the Company's ultimate liability, if any, arising from the pending legal proceedings, as well as from asserted legal claims and known potential legal claims which are probable of assertion, taking into account established accruals for estimated liabilities, should not be material to our financial condition or results of operations.

ITEM 4. MINE SAFETY DISCLOSURES
Not applicable

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PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS, AND ISSUER PURCHASES OF EQUITY SECURITIES
Market Information
The Company's common stock is publicly traded on the NASDAQ Global Select Market under the symbol ATSG. The closing price of ATSG’s common stock was $30.61 on March 1, 2022.
Holders
On March 1, 2022, there were approximately 1,282 stockholders of record of ATSG’s common stock.
Dividends
We currently do not pay a dividend. Future dividends, if any, and the timing of declaration of any such dividends, will be at the discretion of the Board and will depend upon many factors including, but not limited to, certain restrictions that we have on our ability to pay dividends. We are restricted from paying dividends on our common stock in excess of $100.0 million during any calendar year under the provisions of the Senior Credit Agreement. Additionally, the Senior Notes and related Indenture generally restrict our ability to pay dividends on or make distributions in respect of capital stock or make certain other restricted payments or investments, subject to certain exceptions therein including, upon the satisfaction of certain conditions, the making of permitted dividends up to $100.0 million during any calendar year and other additional permitted dividends, investments and other restricted payments not to exceed the amounts set forth therein. We have also agreed to not issue dividends on our shares through September 30, 2022, in connection with our receipt of funding under the CARES Act, the PSP Extension Law and the American Rescue Plan.
Securities authorized for issuance under equity compensation plans
For the response to this Item, see Item 12 of this report.
Purchases of equity securities by the issuer and affiliated purchasers
The Senior Credit Agreement limits the amount of common stock the Company can repurchase to $100.0 million during any calendar year, provided the Company's total debt to EBITDA ratio is under 3.50 times on a trailing twelve-month basis, after giving effect to the repurchase.
On August 5, 2014, the Board of Directors authorized the Company to repurchase up to $50.0 million of outstanding common stock. In May 2016, the Board amended the Company's common stock repurchase program increasing the amount that management may repurchase from $50.0 million to $100.0 million of outstanding common stock. In February 2018, the Board increased the authorization from $100.0 million to $150.0 million (less amounts previously repurchased). The Board's authorization does not require the Company to repurchase a specific number of shares or establish a time frame for any repurchase and the Board may terminate the repurchase program at any time. Repurchases may be made from time to time in the open market or in privately negotiated transactions. There is no expiration date for the repurchase program. There were no repurchases made during the fourth quarter of 2021. As of December 31, 2021, the Company had repurchased 6,592,349 shares and the maximum dollar value of shares that could then be purchased under the program was $61.3 million.
The share repurchase program has been suspended until the CARES Act, PSP Extension Law and American Rescue Plan restrictions on the repurchase of shares have lapsed. For more information, see Note H of the accompanying consolidated financial statements in this report.
On March 5, 2021, Amazon exercised warrants for 865,548 shares of the Company's common stock through a cashless exercise by forfeiting 480,047 warrants from the 2016 Investment Agreement as payment. For the cashless exchange, ATSG shares were valued at $27.27 per share, its volume-weighted average price for the previous 30 trading days immediately preceding March 5, 2021. Also on March 5, 2021, Amazon notified the Company of its intent to exercise warrants from the 2016 Investment agreement for 13,562,897 shares of the Company's common stock by paying $132.0 million of cash to the Company. This exercise was contingent upon the approval of the United States Department of Transportation, and the expiration or termination of any applicable waiting period pursuant to the Hart-Scott-Rodino Antitrust Improvements Act of 1976. After receiving all required regulatory
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approvals and clearances, Amazon remitted the funds to the Company on May 7, 2021 and the Company issued the corresponding shares of common stock, completing the warrant exercise. These funds were used to pay down the balance of the Company's revolving credit facility. The shares were issued to Amazon without registration under the Securities Act of 1933, as amended (the “1933 Act”), pursuant to exemptions from registration under Section 4(2) of the 1933 Act and Regulation D promulgated by the Securities and Exchange Commission under the 1933 Act.

Performance Graph
The graph below compares the cumulative total stockholder return on a $100 investment in ATSG’s common stock with the cumulative total return of a $100 investment in the NASDAQ Composite Index and the cumulative total return of a $100 investment in the NASDAQ Transportation Index for the period beginning on December 31, 2016 and ending on December 31, 2021.
atsg-20211231_g1.jpg
 12/31/201612/31/201712/31/201812/31/201912/31/202012/31/2021
Air Transport Services Group, Inc.  100.00 144.99 142.92 146.99 196.37 184.09 
NASDAQ Composite Index100.00 129.64 125.96 172.17 249.51 304.85 
NASDAQ Transportation Index100.00 123.35 110.84 133.75 137.58 165.72 
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ITEM 6. SELECTED FINANCIAL DATA

Part II, Item 6, is no longer required as the Company has adopted certain provisions within the amendments to Regulation S-K that eliminated Item 301.


ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
The following Management’s Discussion and Analysis has been prepared with reference to the historical financial condition and results of operations of Air Transport Services Group, Inc., and its subsidiaries. It should be read in conjunction with the accompanying consolidated financial statements and related notes included in Item 8 of this report as well as Business Development described in Item 1 and Risk Factors in Item 1A of this report.

OVERVIEW
We lease aircraft and provide airline operations, aircraft modification and maintenance services, ground services, and other support services to the air transportation and logistics industries. Through the Company's subsidiaries, we offer a range of complementary services to delivery companies, freight forwarders, e-commerce operators, airlines and government customers. Our principal subsidiaries include our aircraft leasing company (CAM) and three independently certificated airlines, (ABX, ATI and OAI).
We have two reportable segments:
CAM offers aircraft leasing and related services to external customers and also leases aircraft internally to the Company's airlines. CAM acquires passenger aircraft and manages the modification of the aircraft into freighters. The follow-on aircraft leases normally cover a term of five to ten years. CAM currently leases Boeing 767, 757 and 777 aircraft and aircraft engines.
ACMI Services includes the cargo and passenger transportation operations of our three airlines. Our airlines operate under contracts to provide a combination of aircraft, crews, maintenance, insurance and aviation fuel. Our customers are typically responsible for supplying the necessary aviation fuel and cargo handling services and reimbursing our airline for other operating expenses such as landing fees, ramp expenses, certain aircraft maintenance expenses and fuel procured directly by the airline. Aircraft charter agreements, including those for the U.S. Department of Defense, usually require the airline to provide full service, including fuel and other operating expenses for a fixed, all-inclusive price.
Our other business operations, which primarily provide support services to the transportation industry, include providing aircraft maintenance and modification services to customers, cargo load transfer and sorting services as well as related equipment maintenance services. These operations do not constitute reportable segments.
At December 31, 2021, we owned 107 Boeing aircraft that were in revenue service. We also owned twelve Boeing 767-300 aircraft and one Airbus 321-200 aircraft either already undergoing or awaiting induction into the freighter conversion process at December 31, 2021. In addition to these aircraft, we leased four passenger aircraft from third parties and operated six freighter aircraft provided by customers.
Our highlights for 2021 include 1) taking redelivery of 12 CAM-owned Boeing 767-300 newly converted freighter aircraft and leasing all of them to external customers under long term leases; 2) adding four more customer-provided aircraft to the fleet that we operate for our customers under CMI agreements, bringing that total to 56 freighter aircraft; 3) inducting our initial Airbus 321 passenger aircraft into the freighter conversion process at our hangar facility in Tampa, Florida; 4) diversifying our ability to deliver converted Boeing 767-300 freighter aircraft by reserving aircraft conversion slots with Boeing; 5) offering our aircraft leasing customers additional solutions for aircraft engines; and 6) securing freighter modification slots with EFW for 20 Airbus A330 aircraft.
Due to the strong demand for medium widebody and narrow body freighters and as part of our continued growth strategy to expand and diversify our fleet, we have secured aircraft conversion slots over the next few years. We continue to partner with IAI and have forged new conversion relationships with Boeing and EFW, as well as gained the ability to perform our own conversions of the Airbus A321 aircraft through our joint venture arrangement.

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COVID-19
Our passenger flight operations have been and will continue to be impacted by the COVID-19 pandemic primarily as a result of certain international airport closures, flight cancellations and increased expenses. Our airlines have received federal government funding pursuant to payroll support programs as described in Note H of the accompanying financial statements. Vendors that convert our aircraft into freighters have experienced supply chain disruptions resulting in the delay of aircraft conversions. While the pandemic has made network operations more difficult to maintain, it has not had a significant adverse financial impact on our airline operations for customers' freight networks. We have not experienced a wide-spread outbreak at any of our employee locations.
A COVID-19 outbreak among our flight crews, at one of our maintenance facilities, at a critical vendor, at a customer sorting center, at an aircraft modification facility or at an airport could result in additional workforce shortages, facility closures, delayed aircraft deployments and additional flight cancellations. Additionally, the threat of COVID-19's continued spread, regulatory requirements and government restrictions could result in critical supply chain disruptions, a reduced workforce, reduced availability of contractors, scarcity of critical parts and delayed deliveries of parts and equipment. In such event, flight delays, additional revenue disruptions and additional costs would result.
Customers
Our largest customers are ASI, which is a subsidiary of Amazon, the DoD and DHL.
Revenues from our commercial arrangements with ASI comprised approximately 35%, 30% and 23% of our consolidated revenues during the years ended December 31, 2021, 2020 and 2019, respectively. As of December 31, 2021, we leased 42 Boeing 767 freighter aircraft to ASI with lease expirations between 2023 and 2031 and we operate those aircraft for ASI. The aircraft lease terms typically range from 5 to 10 years. We operate four other Boeing 767 aircraft provided by ASI. We also provide ground services and aircraft maintenance services to ASI.
The DoD comprised 26%, 31% and 34% of our consolidated revenues during the years ended December 31, 2021, 2020 and 2019, respectively, derived from operating passenger and combi charter flights.
As of December 31, 2021, we leased 12 Boeing 767 freighter aircraft to DHL comprised of four Boeing 767-200 aircraft and eight Boeing 767-300 aircraft, with expirations between 2022 and 2028. Eight of the 12 Boeing 767 aircraft were being operated by the Company's airlines for DHL. Additionally we operated two Boeing 767 aircraft that were provided by DHL. DHL comprised 12%, 12% and 14% of our consolidated revenues during the years ended December 31, 2021, 2020 and 2019, respectively.
In May 2021, CAM reached an agreement with DHL to lease four more Boeing 767-300 converted freighters to DHL, each for a term of seven years. One of these leases began in the third quarter of 2021 and the remaining three aircraft leases are expected to begin in 2022. In February 2022, ATSG and DHL agreed to a six-year extension of its dry leases for five Boeing 767 freighters as well as an extension of the CMI agreement for ABX to operate aircraft through April 2028. The CMI agreement was expanded to include two additional 767 freighters.

RESULTS OF OPERATIONS
Revenue and Earnings Summary
External customer revenues from continuing operations increased by $163.7 million, or 10%, to $1,734.3 million during 2021 compared to 2020. Customer revenues increased in 2021 for contracted airline services, charter flights, aircraft leasing and aviation fuel sales, compared to the previous year periods. Beginning in late February 2020, our revenues were disrupted due to the COVID-19 pandemic. The DoD and other customers began canceling scheduled passenger flights as a result of the pandemic. The decline in revenues from these cancellations was offset by an increase in flying for our customers' package delivery networks and charter flight operations during 2020. Revenues for 2019 were $1,452.2 million.

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The consolidated net earnings from continuing operations were $229.0 million for 2021 compared to $25.1 million for 2020 and $60.0 million for 2019. The pre-tax earnings from continuing operations were $301.2 million for 2021 compared to $41.4 million for 2020 and $71.6 million for 2019. Earnings were affected by the following specific events and certain adjustments that do not directly reflect our underlying operations among the years presented.
On a pre-tax basis, earnings included net gains of $30.0 million and net losses of $100.8 million and $12.3 million for the years ended December 31, 2021, 2020 and 2019, respectively, for the re-measurement of financial instruments, including warrant obligations granted to Amazon.
Pre-tax earnings were also reduced by $23.1 million, $20.7 million and $17.2 million for the years ended December 31, 2021, 2020 and 2019, respectively, for the amortization of customer incentives given to Amazon in the form of warrants.
Pre-tax earnings from continuing operations included gains of $17.8 million and $12.0 million and expenses of $9.4 million for the years ended December 31, 2021, 2020 and 2019, respectively, for settlement charges, curtailments and other non-service components of retiree benefit plans.
Pre-tax earnings included losses of $2.6 million, $13.6 million and $17.4 million for the years ended December 31, 2021, 2020 and 2019, respectively, for the Company's share of development costs for a joint venture and the partial sale of an airline investment.
Pre-tax earnings for the year ended December 31, 2021, included a charge of $6.5 million to write off debt issuance costs in conjunction with the repayment of term loans.
Pre-tax earnings for the year ended December 31, 2020, were decreased by an impairment charge of $39.1 million for our four Boeing 757 freighter aircraft and related assets.
During the years ended December 31, 2021 and 2020, the Company recognized $111.7 million and $47.2 million of government grants from the CARES Act, PSP Extension Law and the American Rescue Plan.
Pre-tax earnings for 2019 also included expense of $0.4 million, respectively, for acquisition fees incurred during the Company's acquisition of Omni.
After removing the effects of these items, adjusted pre-tax earnings from continuing operations, a non-GAAP measure (a definition and reconciliation of adjusted pre-tax earnings from continuing operations follows), were $173.9 million for 2021 compared to $156.2 million for 2020 and $128.3 million for 2019.
Adjusted pre-tax earnings from continuing operations for 2021 improved by 11.3% and 21.8% for 2021 and 2020, respectively, driven by increased revenues primarily from CAM and the ACMI Services segments. While improved, our results in 2021 and 2020, particularly for DoD and commercial passenger flying, were detrimentally impacted by the COVID-19 pandemic.

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A summary of our revenues and pre-tax earnings and adjusted pre-tax earnings from continuing operations is shown below (in thousands):
 Years Ending December 31
 202120202019
Revenues from Continuing Operations:
CAM
Aircraft leasing and related services$390,327 $327,170 $301,984 
Lease incentive amortization(20,040)(18,509)(16,708)
Total CAM370,287 308,661 285,276 
ACMI Services1,185,128 1,147,279 1,078,288 
Other Activities375,571 334,300 314,014 
Total Revenues1,930,986 1,790,240 1,677,578 
Eliminate internal revenues(196,704)(219,665)(225,395)
Customer Revenues$1,734,282 $1,570,575 $1,452,183 
Pre-Tax Earnings from Continuing Operations:
CAM, inclusive of interest expense$106,161 $77,424 $68,643 
ACMI Services, inclusive of government grants and interest expense158,733 114,128 32,055 
Other Activities112 (5,933)13,422 
Net unallocated interest expense(2,525)(2,825)(3,024)
Impairment of aircraft and related assets— (39,075)— 
Net financial instrument re-measurement (loss) gain29,979 (100,771)(12,302)
Transaction fees— — (373)
Other non-service components of retiree benefits costs, net17,827 12,032 (9,404)
Write off of debt issuance costs(6,505)— — 
Loss from non-consolidated affiliate(2,577)(13,587)(17,445)
Pre-Tax Earnings from Continuing Operations301,205 41,393 71,572 
Add other non-service components of retiree benefit costs, net(17,827)(12,032)9,404 
Less government grants(111,673)(47,231)— 
Add impairment of aircraft and related assets— 39,075 — 
Add debt issuance costs6,505 — — 
Add charges for non-consolidated affiliates2,577 13,587 17,445 
Add lease incentive amortization23,094 20,671 17,178 
Add transaction fees— — 373 
Add net loss (gain) on financial instruments(29,979)100,771 12,302 
Adjusted Pre-Tax Earnings from Continuing Operations$173,902 $156,234 $128,274 
Adjusted pre-tax earnings from continuing operations, a non-GAAP measure, is pre-tax earnings excluding the following: (i) settlement charges and other non-service components of retiree benefit costs; (ii) gains and losses for the fair value re-measurement of financial instruments including warrants issued to Amazon; (iii) customer incentive amortization; (iv) the transaction fees related to the acquisition of Omni; (v) the start-up costs of a non-consolidated joint venture; (vi) the sale of an airline investment; and (vii) impairment charges for aircraft and related assets. We exclude these items from adjusted pre-tax earnings because they are distinctly different in their predictability or not closely related to our on-going operating activities. We also excluded the recognition of government grants from adjusted earnings to improve comparability between periods. Management uses adjusted pre-tax earnings to compare the performance of core operating results between periods. Presenting this measure provides investors with a comparative metric of fundamental operations while highlighting changes to certain items among periods.
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Adjusted pre-tax earnings should not be considered in isolation or as a substitute for analysis of the Company's results as reported under GAAP.
The Company's earnings were impacted by the fair value re-measurement of the Amazon warrants classified in liabilities at the end of each reporting period, customer incentive amortization and the related income tax effects. The fair value of the warrants issued or issuable to Amazon were recorded as a customer incentive asset and are amortized against revenues over the duration of the aircraft leases. Our accounting for the warrants issued to Amazon has been determined in accordance with the financial reporting guidance for financial instruments. For additional information about the warrants issued to Amazon, see the accompanying notes to the financial statements included in this report.
Aircraft Fleet Summary
Our fleet of cargo and passenger aircraft is summarized in the following table as of December 31, 2021, 2020 and 2019. Our CAM-owned operating aircraft fleet has increased by 13 aircraft since the end of 2019, driven by customer demand for the Boeing 767-300 converted freighter. Our freighters, converted from passenger aircraft, utilize standard shipping containers and can be deployed into regional cargo markets more economically than larger capacity aircraft, newly built freighters or other competing alternatives. At December 31, 2021, the Company owned twelve Boeing 767-300 aircraft and one Airbus A321-200 aircraft that were either already undergoing or awaiting induction into the freighter conversion process.
Aircraft fleet activity during 2021 is summarized below:
CAM completed the modification of eight Boeing 767-300 freighter aircraft purchased in the previous year and completed the modification of three Boeing 767-300 freighter aircraft purchased in 2021. CAM began to lease all eleven of these aircraft to external customers under multi-year leases. ATI operates eight of these aircraft for a customer.
OAI returned one Boeing 767-300 passenger aircraft to CAM. CAM converted this passenger aircraft into a standard freighter configuration. This aircraft was leased to an external customer under a multi-year lease.
ATI returned three Boeing 767-300 freighter aircraft to CAM. CAM leased all three of these aircraft to an external customer under a multi-year lease. ATI operates these aircraft for the customer.
External customers returned five Boeing 767-200 freighter aircraft to CAM. Three of these aircraft were leased to other external customers under multi-year leases. One of the aircraft is being prepped for lease to another external customer later in 2021. The fifth aircraft was retired.
CAM purchased fifteen Boeing 767-300 passenger aircraft for the purpose of converting the passenger aircraft into a standard freighter configuration. Three of these aircraft were leased to customers as noted above. The remainder of these aircraft are expected to be leased to external customers during 2022 and 2023.
CAM purchased one Airbus A321-200 passenger aircraft for the purpose of converting the passenger aircraft into a standard freighter configuration. This aircraft is expected to be leased to an external customer during 2022.
ATI returned the last Boeing 757-200 freighter aircraft to CAM and the aircraft was retired and sold.
ATI began to operate two customer-provided Boeing 767-300 freighter aircraft and ABX began to operate two customer-provided Boeing 767-200 freighter aircraft.
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202120202019
 ACMI
Services
CAMTotalACMI
Services
CAMTotalACMI
Services
CAMTotal
In-service aircraft
Aircraft owned
Boeing 767-200 Freighter26 31 28 33 26 33 
Boeing 767-200 Passenger— — — 
Boeing 767-300 Freighter59 61 45 50 35 40 
Boeing 767-300 Passenger— — — 
Boeing 777-200 Passenger— — — 
Boeing 757-200 Freighter— — — — — 
Boeing 757-200 Combi— — — 
Boeing 737-400 Freighter— — — — — — — 
Total22 85 107 27 73 100 32 62 94 
Operating lease
Boeing 767-200 Passenger— — — 
Boeing 767-300 Passenger— — — 
Boeing 767-200 Freighter— — — — — — — 
Boeing 767-300 Freighter— — — 
Total10 — 10 — — 
Other aircraft
Owned Boeing 767-300 under modification— 12 12 — — 
Owned Airbus A321-200 under modification— — — — — — — 
Owned Boeing 767 available or staging for lease— — — — — 
As of December 31, 2021, ABX, ATI and OAI were leasing 22 in-service aircraft internally from CAM for use in ACMI Services. Of CAM's 26 externally leased Boeing 767-200 freighter aircraft, 12 were leased to ASI and operated by ABX or ATI, one was leased to DHL and operated by ABX, three were leased to DHL and were being operated by a DHL-affiliated airline and ten were leased to other external customers. Of the 59 externally leased Boeing 767-300 freighter aircraft, 30 were leased to ASI and operated by ABX or ATI, seven were leased to DHL and operated by ABX, one was leased to DHL and is being operated by a DHL-affiliated airline and 21 were leased to other external customers. The carrying values of the total in-service fleet as of December 31, 2021, 2020 and 2019 were $1,693.0 million, $1,535.3 million and $1,387.6 million, respectively.
2021 and 2020
CAM
As of December 31, 2021 and 2020, CAM had 85 and 73 aircraft under lease to external customers, respectively. CAM's revenues grew by $61.6 million during 2021 compared to 2020, primarily as a result of additional aircraft leases. Revenues from external customers totaled $273.3 million and $205.0 million for 2021 and 2020, respectively. CAM's revenues from the Company's airlines totaled $97.0 million during 2021, compared to $103.6 million for 2020. CAM's aircraft leasing and related services revenues, which exclude customer lease incentive amortization, increased $63.2 million in 2021 compared to 2020, as a result of new aircraft leases in 2021. During 2021, CAM added 12 Boeing 767-300 freighter aircraft to its portfolio and placed 15 Boeing 767-300 aircraft with external customers under long-term leases.
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In October of 2021, CAM began to offer engine power coverage to lessees of CAM's General Electric powered Boeing 767-200 aircraft. Under this service, CAM is responsible for providing and maintaining engines for its lease customers as needed through a pool of engines. Revenues from external customers increased $6.5 million during 2021 for this service. This also resulted in additional depreciation expense of $2.1 million before the effects of income taxes during 2021. From these new commercial agreements, we expect CAM's revenues and earnings to continue to increase dependent upon multiple factors including the cycles operated, the number of maintenance overhauls and the severity of unscheduled maintenance events.
CAM's pre-tax earnings, inclusive of internally allocated interest expense, were $106.2 million and $77.4 million during 2021 and 2020, respectively. Increased pre-tax earnings reflect the 15 aircraft placed into service in 2021 and a $1.1 million decrease in internally allocated interest expense due to lower company-wide interest expense, offset by a $31.7 million increase in depreciation expense driven by the addition of 12 Boeing aircraft in 2021 compared to 2020.
In addition to the 12 Boeing 767-300 aircraft and one Airbus A321-200 aircraft which were in the modification process at December 31, 2021, CAM has agreements to purchase eleven more Boeing 767-300 aircraft and two more Airbus A321-200 aircraft during 2022 and 2023. CAM's operating results will depend on its continuing ability to convert passenger aircraft into freighters within planned costs and within the time frames required by customers. We expect to lease to external customers at least nine newly modified Boeing 767-300 freighters, two newly modified Airbus A321-200 freighters and re-deploy one Boeing 767-200 freighter during 2022. CAM's future operating results will also depend on the timing and lease rates under which aircraft are redeployed when leases expire. During 2022, three Boeing 767-200 aircraft are expected to be returned from lease.
ACMI Services
Total revenues from ACMI Services increased $37.8 million during 2021 compared with 2020 to $1,185.1 million. Improved revenues for 2021 were driven by nine more freighter aircraft in operations and a 12% increase in customer block hours during 2021. Increased revenues for 2021 included additional aircraft operations for ASI and DHL, while block hours flown for the DoD declined compared to 2020. As of December 31, 2021 and 2020, ACMI Services included 82 and 73 in-service aircraft, respectively.
Revenues were negatively impacted by the COVID-19 pandemic. In late February 2020, the DoD began canceling combi aircraft flights and in March of 2020, commercial customers began canceling scheduled passenger flights as a result of the pandemic. During 2020, the DoD and other governmental agencies contracted for flights to return people to the United States who were stranded abroad as a result of the pandemic, which partially mitigated the impact of the pandemic during 2020. As a result, combined block hours flown for the DoD, contracted commercial passenger and combi flights declined 10% for the year ended December 31, 2021, compared to December 31, 2020. The decline in revenues from passenger and combi aircraft operations were offset by increased flying for customer cargo operations, particularly e-commerce networks. Customer block hours for freighter aircraft increased 19% in 2021 compared to 2020, driven primarily by the growth of e-commerce in the U.S.
ACMI Services had pre-tax earnings of $158.7 million during 2021, compared to $114.1 million for 2020 inclusive of internally allocated interest expense and the recognition of pandemic-related government grants of $111.7 million and $47.2 million for the years ended December 31, 2021 and 2020, respectively. Earnings for 2021 were negatively impacted by less passenger flying and higher expenses for passenger operations during 2021 compared to 2020. Internally allocated interest expense decreased to $18.1 million for 2021 compared to $20.5 million for 2020.
Maintaining profitability in ACMI Services will depend on a number of factors, including the impact of the COVID-19 pandemic, customer flight schedules, crewmember productivity and pay, employee benefits, aircraft maintenance schedules and the number of aircraft we operate. Recruiting, training and retaining employees and contractors is an important factor to our success. If we experience a distribution or shortage of qualified employees, ACMI Services' financial results could be detrimentally impacted. We expect our operating revenues from passenger and combi flights to rebound from pandemic low points. During 2022, we expect DHL to lease at least two additional Boeing 767-300 freighter aircraft from CAM and contract the operation of those aircraft through our existing DHL CMI agreement. During 2022, we anticipate operating up to five additional customer-provided aircraft under operating agreements.

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Other Activities
We provide other support services to our ACMI Services customers and other airlines by leveraging our knowledge and capabilities developed for our own operations over the years. Through our FAA certificated maintenance and repair subsidiaries, we sell aircraft parts and provide aircraft maintenance and modification services. We also provide mail sorting, parcel handling and logistical support to USPS facilities and similar services to certain ASI hub and gateway locations in the U.S. We provide maintenance for ground equipment, facilities and material handling equipment and we resell aviation fuel in Wilmington, Ohio. Additionally, we provide flight training services.
External customer revenues from all other activities increased $57.6 million in 2021 compared to 2020, due to broad increases across most maintenance and ground services offerings. Additionally, the sale of aviation fuel to customers at the Wilmington, Ohio air hub increased in 2021. Revenues from ground services increased due to the addition, since mid-2020, of a third operating contract for USPS mail sorting.
Pre-tax earnings from other activities increased by $6.0 million to a pretax gain of $0.1 million in 2021. The improved earnings comparison for 2021 reflects start-up costs for the USPS facilities which we started to operate in 2020, as well as the increased revenues.
Expenses from Continuing Operations
Salaries, wages and benefits expense increased $72.3 million or 14% during 2021 compared to 2020. While the number of total employees is similar among the two years, headcount for flight crews and flight operations personnel increased while the number of sorters decreased. Additionally, labor rates for aircraft maintenance technicians and freight sorters increased over 2020 and may continue to increase.
Depreciation and amortization expense increased $30.4 million during 2021 compared to 2020. The increase reflects incremental depreciation for twelve Boeing 767-300 aircraft and additional aircraft engines added to the operating fleet since the beginning of 2021, as well as capitalized heavy maintenance and navigation technology upgrades. We expect depreciation expense to increase during future periods in conjunction with our fleet expansion, engine programs and capital spending plans.
Maintenance, materials and repairs expense decreased by $6.0 million during 2021 compared to 2020. Decreased maintenance expense for 2021 was driven by lower costs for engine repairs at our airlines offset by increased flight operations for our customers' express cargo networks and increased heavy maintenance. The aircraft maintenance and material expenses can vary among periods due to the number of maintenance events and the scope of airframe checks that are performed. Maintenance expense for 2021 included $27.8 million for an engine power-by-the-cycle agreement that expired in September of 2021. We have negotiated time and material agreements with engine maintenance providers to replace the expired agreement.
Fuel expense increased by $25.2 million during 2021 compared to 2020. Fuel expense includes the cost of fuel to operate DoD charters, fuel used to position aircraft for service and for maintenance purposes, as well as the cost of fuel sales. Fuel expense increased during 2021 compared to 2020 due primarily to increases in the price per gallon of aviation fuel compared to the previous year. Aviation fuel rates increased over 40% per gallon for the comparative periods.
Contracted ground and aviation services expense includes navigational services, aircraft and cargo handling services, baggage handling services and other airport services. Contracted ground and aviation services increased $12.2 million during 2021 compared to 2020. The increases were driven by additional ground equipment installation projects for customers and higher fees for airport services compared to the previous year.
Travel expense increased by $9.2 million during 2021 compared to 2020. The increase in travel expense reflects an increase in employee travel to support higher block hours flown for customers, which increased 12% compared to 2020.
Landing and ramp expense, which includes the cost of deicing chemicals, increased by $1.8 million during 2021 compared to 2020, driven by increased block hours for our customers' express cargo networks.
Rent expense increased by $4.4 million during 2021 compared to 2020 due to an additional passenger aircraft and facility rents for the two USPS facilities started in mid-2020.
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Insurance expense increased by $2.7 million during 2021 compared to 2020. Aircraft fleet insurance has increased due to additional aircraft operations and higher insurance rates during 2021 compared to 2020.
Other operating expenses increased by $0.2 million during 2021 compared to 2020. Other operating expenses include professional fees, employee training, utilities, commission expense to our CRAF team for DoD revenues and other expenses.
Operating results included a pre-tax expense credit of $111.7 million and $47.2 million during 2021 and 2020, respectively, to recognize grants received from the U.S. government under the CARES Act, PSP Extension Law and the American Rescue Plan. For additional information about these grants, see Note H of the unaudited condensed consolidated financial statements included in this report.
Non Operating Income, Adjustments and Expenses
Interest expense decreased by $4.1 million during 2021 compared to 2020. Interest expense during 2021 decreased compared to the previous year due to lower interest rates on our borrowings under the Senior Credit Agreement and lower average debt balances outstanding during the year. During the second quarter of 2021, the Company recorded a pre-tax charge of $6.5 million to write-off the unamortized debt issuance costs of the Company's term loans which were repaid in full during April 2021.
The Company recorded unrealized pre-tax gains on financial instrument re-measurements of $30.0 million during the year ended December 31, 2021, compared to pre-tax losses of $100.8 million for 2020. The gains and losses include the results of re-valuing, as of December 31, 2021 and 2020, the fair value of the stock warrants granted to Amazon. Generally, the warrant values increase or decrease with corresponding increases or decreases in the ATSG share price during the measurement period. Additionally, the value of certain warrants depends partially on the probability that warrants will vest upon the execution of aircraft leases. Increases in the probability of a warrants vesting results in higher liabilities and losses. Re-measurement gains for 2021 reflect a 6% decrease in the traded price of ATSG shares.
Non service components of retiree benefits were a net loss of $17.8 million for 2021 compared to $12.0 million for 2020. The non service component gain and losses of retiree benefits are determined by actuaries and include the amortization of unrecognized gain and loss stemming from changes in assumptions regarding discount rates, expected investment returns and other retirement plan assumptions. Non service components of retiree benefits can vary significantly from one year to the next based on investment results and changes in discount rates used to account for defined benefit retirement plans.
Income tax expense from earnings from continuing operations increased $55.9 million for 2021 compared to 2020. Income taxes for 2020 included deferred income tax effects for the gains and losses from warrant re-measurements and the amortization of the customer incentive while 2021 did not. The income tax effects of the warrant re-measurements and the amortization of the customer incentive are different than the book tax expenses and benefits required by generally accepted accounting principles because for tax purposes, the warrants are valued at a different time and under a different valuation method. The recognition of discrete tax items, such as the conversion of employee stock awards, the issuance of stock warrants and other items also have an impact on the effective rate during a period. The effective tax rate, before including the warrant revaluations and incentive amortization, was 24% for 2021 compared to 22% for the year ended December 31, 2020. The higher effective income tax rate for 2021 reflects increases in the apportionment of taxable income in state jurisdictions with higher tax rates compared to 2020, and an increase in deferred tax valuation allowance for capital losses on a Company investment.
The effective rate for 2022 will be impacted by a number of factors, including the apportionment of income among taxing jurisdictions and stock compensation limitations. We estimate that the Company's effective tax rate for 2022, before applying the deductibility of the stock warrant re-measurement and related incentive amortization and the benefit of the stock compensation, will be approximately 24%.
As of December 31, 2021, the Company had operating loss carryforwards for U.S. federal income tax purposes of approximately $413.9 million which do not expire but the use of which is limited to 80% of taxable income in any given year. We expect to utilize the loss carryforwards to offset federal income tax liabilities in the future. As a result, we do not expect to pay federal income taxes until 2024 or later. The Company may, however, be required to pay certain federal minimum taxes and certain state and local income taxes before then. The Company's taxable income earned from international flights is primarily sourced to the United States under international aviation
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agreements and treaties. When we operate in countries without such agreements, the Company could incur additional foreign income taxes.
Discontinued Operations
The financial results of discontinued operations primarily reflect pension, workers' compensation cost adjustments and other benefits for former employees previously associated with ABX's former hub operations pursuant to which ABX performed package sorting services for DHL. Pre-tax gains related to the former sorting operations were $3.2 million for 2021 compared to $9.1 million for 2020. Pre-tax earnings during 2021 and 2020 were a result of reductions in self-insurance reserves for former employee claims and pension credits.

2020 compared to 2019
CAM
As of December 31, 2020 and 2019, CAM had 73 and 62 aircraft under lease to external customers, respectively. CAM's revenues grew by $23.4 million during 2020 compared to 2019, primarily as a result of additional aircraft leases. Revenues from external customers totaled $205.0 million and $168.1 million for 2020 and 2019, respectively. CAM's revenues from the Company's airlines totaled $103.6 million during 2020, compared to $117.2 million for 2019. CAM's aircraft leasing and related services revenues, which exclude customer lease incentive amortization, increased $25.2 million in 2020 compared to 2019 as a result of new aircraft leases in 2020. During 2020, CAM added 11 Boeing 767-300 aircraft to its portfolio and placed 11 Boeing 767-300 aircraft with external customers under long-term leases.
CAM's pre-tax earnings, inclusive of internally allocated interest expense, were $77.4 million and $68.6 million during 2020 and 2019, respectively. Increased pre-tax earnings reflect the eleven aircraft placed into service in 2020, offset by a $1.0 million increase in internally allocated interest expense due to higher debt levels and a $13.5 million increase in depreciation expense driven by the addition of eleven Boeing aircraft in 2020 compared to 2019.
ACMI Services
Total revenues from ACMI Services increased $69.0 million during 2020 compared with 2019 to $1,147.3 million. Improved revenues were driven by a 14% increase in customer block hours during 2020. Increased revenues for 2020 included additional aircraft operations for ASI and DHL, while block hours flown for the DoD declined.
Revenues for the year ending December 31, 2020, were impacted by the COVID-19 pandemic. In late February 2020, the DoD began canceling combi aircraft flights and in March, commercial customers began canceling scheduled passenger flights as a result of the pandemic. Combined block hours flown for contracted commercial passenger and combi flights declined 39% for the year ended December 31, 2020, compared to December 31, 2019, due to the pandemic. The decline in revenues from these cancellations was mitigated by increased flying for customer e-commerce networks and passenger charter flights for the DoD and other governmental agencies, including flights to return people to the United States who were stranded abroad as a result of the pandemic. Operations during the year ending December 31, 2020 also included additional transoceanic flights to replace cargo capacity normally serviced in the belly-hold of passenger aircraft.
As of December 31, 2020, ACMI Services included 73 in-service aircraft, including 12 passenger aircraft, 4 combi aircraft and 11 freighter aircraft leased internally from CAM, 4 passenger aircraft leased from an external lessor, eight CAM-owned freighter aircraft which are under lease to DHL and operated by ABX under the DHL CMI agreement, 31 CAM-owned freighter aircraft which are under lease to ASI and operated by ATI and ABX under the ASI ATSA, two freighter aircraft from an external lessor under lease to ASI and operated by ATI under the ASI ATSA, and another CAM-owned freighter leased to a customer and operated by ATI.
ACMI Services had pre-tax earnings of $66.9 million during 2020, compared to $32.1 million during 2019 inclusive of internally allocated interest expense. Improved pre-tax results in 2020 compared to 2019 were a result of expanded revenues from ASI and DHL and ad hoc passenger charters. During 2020, we began to operate five more CAM-owned Boeing 767-300 aircraft under the ASI ATSA. ACMI Services benefited from reduced travel costs including lower airfares during 2020 compared to 2019. Internally allocated interest expense decreased to $20.5 million for 2020 compared to $25.0 million for 2019.

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Other Activities
External customer revenues from all other activities increased $12.3 million in 2020 compared to 2019 primarily due to more aviation fuel sales as customer operations at the Wilmington, Ohio, air hub expanded. Revenues from ground services increased due to the addition, since mid-2020, of operating contracts for two new USPS mail facilities as well as increased volumes at two ASI package gateways that we service. Ground services revenues during 2020 included reductions from equipment and facility maintenance revenues compared to 2019 as customers chose to in-source some of these services. Revenues from aircraft maintenance and part sales declined during 2020 as passenger airlines reduced their need for services during the pandemic. The pre-tax earnings from other activities decreased by $19.4 million to a pre-tax loss of $5.9 million in 2020. Reduced earnings for 2020 are a result of reductions in revenues from higher margin ground maintenance and aircraft maintenance services. Additionally, we incurred start-up costs for two USPS mail facility contracts we were awarded during 2020. These reductions were partially offset by additional aviation fuel sales which earn a lower margin.
Expenses from Continuing Operations
Salaries, wages and benefits expense increased $85.4 million, or 20% during 2020 compared to 2019, driven by higher employee headcounts for flight operations, maintenance operations and package sorting services. The total headcount increased 20% as of December 31, 2020, compared to December 31, 2019. The increases during 2020 include additional flight crewmembers, aircraft maintenance technicians and other personnel to support increased block hours.
Depreciation and amortization expense increased $20.5 million during 2020 compared to 2019. The increase reflects incremental depreciation for eleven Boeing 767-300 aircraft and additional aircraft engines added to the operating fleet since the beginning of 2020, as well as capitalized heavy maintenance and navigation technology upgrades. We expect depreciation expense to increase during future periods in conjunction with our fleet expansion and capital spending plans.
Maintenance, materials and repairs expense increased by $9.2 million during 2020 compared to 2019. Increased maintenance expense for 2020 was driven by increased flight hours and higher costs for unscheduled engine repairs at our airlines. The aircraft maintenance and material expenses can vary among periods due to the number of maintenance events and the scope of airframe checks that are performed.
Fuel expense decreased by $6.7 million during 2020 compared to 2019. Fuel expense includes the cost of fuel to operate DoD charters, fuel used to position aircraft for service and for maintenance purposes, as well as the cost of fuel sales. Fuel expense decreased during 2020 compared to 2019 due to lower prices for aviation fuel during the pandemic.
Contracted ground and aviation services expense includes navigational services, aircraft and cargo handling services, baggage handling services and other airport services. Contracted ground and aviation services decreased $0.5 million during 2020 compared to 2019. Since mid-2019, certain customers chose to in-source some ground services that we had been performing on their behalf.
Travel expense decreased by $13.6 million during 2020 compared to 2019. The decrease in travel expense was due to less employee travel and the lower costs of air travel during the pandemic.
Landing and ramp expense, which includes the cost of deicing chemicals, increased by $1.3 million during 2020 compared to 2019, driven by increased block hours and network locations.
Rent expense increased by $3.3 million during 2020 compared to 2019 due to an additional aircraft partially offset by lower facility rents during 2020.
Insurance expense increased by $2.6 million during 2020 compared to 2019. Aircraft fleet insurance has increased due to additional aircraft operations and higher insurance rates during 2020 compared to 2019.
Other operating expenses decreased by $4.0 million during 2020 compared to 2019. Other operating expenses include professional fees, employee training, utilities, commission expense to our CRAF team for DoD revenues and other expenses.
Asset impairment charges were recorded during the second quarter of 2020 in conjunction with management's decision to retire four Boeing 757 freighter aircraft. Three of the 757 airframes have been removed from service and
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are available for sale. One remains in service through the first quarter of 2021. Impairment charges totaling $39.1 million were recorded, primarily reflecting the fair value of these assets as well as other surplus engines and parts.
Operating results included a pre-tax contra expense of $47.2 million during 2020 to recognize grants received from the U.S. government under the CARES Act.

Non Operating Income, Adjustments and Expenses
Interest expense decreased by $3.8 million during 2020 compared to 2019. Interest expense during 2020 decreased compared to the previous year due to lower interest rates on our borrowings under the Senior Credit Agreement and lower debt balances outstanding during the year.
The Company recorded unrealized pre-tax losses on financial instrument re-measurements of $100.8 million during the year ended December 31, 2020, compared to $12.3 million for 2019. The gains and losses include the results of re-valuing, as of December 31, 2020 and 2019, the fair value of the stock warrants granted to Amazon. Generally, the warrant value increases or decreases with corresponding increases or decreases in the ATSG share price during the measurement period. Warrant losses for 2020 reflect a 34% increase in the traded price of ATSG shares. Additionally, the value of certain warrants depend partially on the probability that warrants will vest upon the execution of aircraft leases. Increases in the traded value of ATSG shares and increases in the probability of vested warrants each result in an increase to the warrant value and resulted in warrant losses recorded to financial instruments for 2020.
Non service components of retiree benefits were a net loss of $12.0 million for 2020 compared to a net gain of $9.4 million for 2019. The non service component gain and losses of retiree benefits are actuarially determined and include the amortization of unrecognized gain and loss stemming from changes in assumptions regarding discount rates, expected investment returns and other retirement plan assumptions. Non service components of retiree benefits can vary significantly from one year to the next based on investment results and changes in discount rates used to account for defined benefit retirement plans.
Income tax expense from earnings from continuing operations increased $4.7 million for 2020 compared to 2019. Income taxes included deferred income tax effects for the gains and losses from warrant re-measurements and the amortization of the customer incentive. The income tax effects of the warrant re-measurements and the amortization of the customer incentive are different than the book expenses and benefits required by generally accepted accounting principles because for tax purposes, the warrants are valued at a different time and under a different valuation method. The recognition of discrete tax items, such as the conversion of employee stock awards, the issuance of stock warrants and other items have an impact on the effective rate during a period. The effective tax rate, before including the warrant revaluations and incentive amortization, was 22% for 2020 compared to 19% for the year ended December 31, 2019. Income tax expense for 2019 reflects a tax benefit of $4.9 million to re-measure deferred state income taxes using lower blended state tax rates than previously estimated.
Discontinued Operations
The financial results of discontinued operations primarily reflect pension, workers' compensation cost adjustments and other benefits for former employees previously associated with ABX's former hub operations pursuant to which ABX performed package sorting services for DHL. Pre-tax gains related to the former sorting operations were $9.1 million for 2020 compared to $1.6 million for 2019. Pre-tax earnings during 2020 and 2019 were a result of reductions in self-insurance reserves for former employee claims and pension credits.

LIQUIDITY AND CAPITAL RESOURCES
Cash Flows
Net cash generated from operating activities totaled $583.6 million, $512.3 million and $396.9 million in 2021, 2020 and 2019, respectively. Improved cash flows generated from operating activities during 2021 and 2020 included additional aircraft leases to customers and increased operating levels of the ACMI Services segment. Operating cash flows for 2021 and 2020 include the receipt of $83.0 million and $75.8 million of grant funds from the CARES Act, PSP Extension Law and the American Rescue Plan, respectively. Cash outlays for pension contributions were $1.7 million, $10.8 million and $5.4 million in 2021, 2020 and 2019, respectively.
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Capital spending levels were primarily the result of aircraft modification costs and the acquisition of aircraft for freighter modification. Cash payments for capital expenditures were $504.7 million, $510.4 million and $453.5 million in 2021, 2020 and 2019, respectively. Capital expenditures in 2021 included $321.6 million for the acquisition of 15 Boeing 767-300 aircraft, one Airbus A321-200 aircraft and freighter modification costs; $171.6 million for required heavy maintenance; and $11.5 million for other equipment. Capital expenditures in 2020 included $353.4 million for the acquisition of eleven Boeing 767-300 aircraft and freighter modification costs; $76.0 million for required heavy maintenance; and $81.0 million for other equipment, including purchases of aircraft engines and rotables. Capital expenditures in 2019 included $328.0 million for the acquisition of eleven Boeing 767-300 aircraft and freighter modification costs; $76.1 million for required heavy maintenance; and $49.4 million for other equipment, including the purchases of aircraft engines and rotables.
Cash proceeds of $19.4 million, $24.6 million and $10.8 million were received in 2021, 2020 and 2019, respectively, for the sale of aircraft engines and airframes.
During 2021, 2020 and 2019, we spent $2.2 million, $13.3 million and $24.4 million, respectively, for acquisitions and investments in other businesses. During 2021, 2020 and 2019, we contributed $2.5 million, $13.3 million and $12.3 million, respectively, for entry and subsequent contributions into a joint-venture with Precision Aircraft Solutions, LLC, to develop a passenger-to-freighter conversion program for Airbus A321-200 aircraft. In 2019, we acquired a group of companies that had been under common control referred to as TriFactor, a material handling systems integrator.
Net cash used in financing activities was $66.3 million and $19.6 million in 2021 and 2020, respectively, and net cash provided by financing activities was $57.0 million in 2019. Financing activities in 2021 included $132 million remitted by Amazon on May 7, 2021, to exercise warrants for the Company's common stock, as described in Note C of the accompanying financial statements. During 2021, we made debt principal payments of $1,900.3 million which included payments of $619.1 million to repay the entire balance of all term loans and payments of $1,280.6 million to the revolving credit facility. Our financing activities during 2021 included a debt offering of a $200 million add-on to our senior unsecured notes (the "Senior Notes"). During 2021, we drew $1,500.6 million from the revolving credit facility. The proceeds from the senior notes add-on of $207.4 million, the funds received from Amazon and draws on the revolving credit facility resulted in the retirement of the term loans and a larger outstanding balance under the revolving credit agreement. During 2020, we drew $180.0 million from the revolving credit facility. Our financing activities during 2020 included a debt offering of $500 million in senior unsecured notes which included net proceeds of $500.0 million used to pay down the revolving credit facility in 2020. Our borrowing activities were necessary to purchase and modify aircraft for deployment into air cargo markets.
Commitments
The table below summarizes the Company's contractual obligations and commercial commitments (in thousands) as of December 31, 2021.
 Payments Due By Year
Contractual ObligationsTotal20222023 and 20242025 and 20262027 and after
Debt obligations, including interest payments$1,558,386 $40,950 $340,283 $433,096 $744,057 
Facility leases26,977 8,964 12,584 5,387 42 
Aircraft and modification obligations391,832 223,322 168,510 — — 
Aircraft and other leases38,955 11,060 18,678 9,217 — 
Total contractual cash obligations$2,016,150 $284,296 $540,055 $447,700 $744,099 
Debt
See Note F of the accompanying financial statements in this report for additional information about the Company's timing of expected and future principal payments. The Company also has future obligations for interest payments associated with its debt. As of December 31, 2021, future interest payments associated with its debt were $40.3 million in 2022, $40.3 million in 2023, $39.9 million in 2024, $37.4 million in 2025, $34.4 million in 2026, and $36.7 million thereafter. Additional debt or lower EBITDA may result in higher interest rates.
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Leases
The Company enters into leases for property, aircraft, engines and other types of equipment in the normal course of business. See Note H to the Consolidated Financial Statements for further detail.
Aircraft purchase and modifications
We expect to increase the size of CAM's fleet in 2022 and beyond through the purchase and modification of additional aircraft. The modification primarily consists of the installation of a standard cargo door and loading system. The Company outsources a significant portion of the aircraft freighter modification process to non-affiliated third parties. In addition to the purchase commitments, we are required to make cash deposits for conversion slots. As of December 31, 2021, the Company has 26 conversion slots for which we have identified aircraft.
Other Commitments
Since August 3, 2017, the Company has been part of a joint-venture with Precision Aircraft Solutions, LLC, to develop a passenger-to-freighter conversion program for Airbus A321-200 aircraft. Approval of a supplemental type certificate from the FAA was granted in 2021 while European certificates are in process. We expect to make contributions equal to the Company's 49% ownership percentage to the joint-venture as may be needed for inventory and other working capital needs during 2022.
The Company provides defined benefit pension plans to certain employee groups. The table above does not include cash contributions for pension funding, due to the absence of scheduled maturities. The timing of pension and post-retirement healthcare payments cannot be reasonably determined, except for $1.7 million expected to be funded in 2022. For additional information about the Company's pension obligations, see Note I of the accompanying financial statements in this report.
Liquidity
At December 31, 2021, the Company had $69.5 million of cash balances and $424.7 million available from the unused portion of the revolving credit facility under its Senior Credit Agreement as described in Note F of the accompanying financial statements. We expect our operations to continue to generate significant net cash in-flows after deducting required spending for heavy maintenance and other sustaining capital expenditures. To expand our fleet we estimate that capital expenditures for aircraft purchases and freighter modifications will total $390 million for 2022. We believe that the Company's current cash balance, forecasted cash flows provided from its customer leases and operating agreements, combined with its Senior Credit Agreement, will be sufficient to fund the expansion and maintenance of our fleet while meeting our contractual obligations, other commitments and working capital requirements for at least the next twelve months.
Continued global disruptions in the supplies chains and labor shortages may delay aircraft modification projects, pushing contractual obligations into later periods and could decrease the projected amount of capital expenditures.

CRITICAL ACCOUNTING ESTIMATES
“Management’s Discussion and Analysis of Financial Condition and Results of Operations,” as well as certain disclosures included elsewhere in this report, are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of these financial statements requires us to select appropriate accounting policies and make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures of contingencies. In certain cases, there are alternative policies or estimation techniques which could be selected. On an ongoing basis, we evaluate our selection of policies and the estimation techniques we use, including those related to revenue recognition, post-retirement liabilities, bad debts, self-insurance reserves, valuation of spare parts inventory, useful lives, salvage values and impairment of property and equipment, income taxes, contingencies and litigation. We base our estimates on historical experience, current conditions and on various other assumptions that are believed to be reasonable under the circumstances. Those factors form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources, as well as for identifying and assessing our accounting treatment with respect to commitments and contingencies. Actual results may differ from these estimates under different assumptions or conditions. We believe the following significant and critical
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accounting policies involve the more significant judgments and estimates used in preparing the consolidated financial statements.
Goodwill and Intangible Assets
We assess in the fourth quarter of each year whether the Company’s goodwill acquired in acquisitions is impaired in accordance with the Financial Accounting Standards Board Accounting Standards Codification (“FASB ASC”) Topic 350-20 Intangibles—Goodwill and Other. Additional assessments may be performed on an interim basis whenever events or changes in circumstances indicate an impairment may have occurred. Indefinite-lived intangible assets are not amortized but are assessed for impairment annually, or more frequently if impairment indicators occur. Finite-lived intangible assets are amortized over their estimated useful economic lives and are periodically reviewed for impairment.
The goodwill impairment test requires significant judgment, including the determination of the fair value of each reporting unit that has goodwill. We estimate the fair value using a market approach and an income approach utilizing discounted cash flows applied to a market-derived rate of return. The market approach utilizes market multiples from comparable publicly traded companies. The market multiples include revenues and EBITDA (earnings before interest, taxes, depreciation and amortization). We derive cash flow assumptions from many factors including recent market trends, expected revenues, cost structure, aircraft maintenance schedules and long-term strategic plans for the deployment of aircraft. Key assumptions under the discounted cash flow models include projections for the number of aircraft in service, capital expenditures, long term growth rates, operating cash flows and market-derived discount rates.
The performance of the goodwill impairment test is the comparison of the fair value of the reporting unit to its respective carrying value. If the carrying value of a reporting unit is less than its fair value no impairment exists. If the carrying value of a reporting unit is higher than its fair value an impairment loss is recorded for the difference and charged to operations. See additional information about the goodwill impairment tests in Note B of the accompanying consolidated financial statements.
Based on our analysis, the individual fair values of each reporting unit having goodwill exceeded their respective carrying values as of December 31, 2021. We have used the assistance of an independent business valuation firm in estimating an expected market rate of return, and in the development of a market approach for CAM and OAI separately, using multiples of EBITDA and revenues from comparable publicly traded companies. Our key assumptions used for CAM's goodwill testing include uncertainties, including the level of demand for cargo aircraft by shippers, the DoD and freight forwarders and CAM's ability to lease aircraft and the lease rates that will be realized. The demand for customer airlift is projected based on input from customers, management's interface with customer planning personnel and aircraft utilization trends. Our key assumptions used for OAI's goodwill testing include the number of aircraft that OAI will operate, the amount of revenues that the aircraft will generate, the number of flight crews and the cost of needed flight crews. We are assuming that demand for commercial passenger flying will resume to pre-pandemic levels in 2023. Our key assumptions used for Pemco's and TriFactor's goodwill testing includes the level of revenues that customers will seek and the cost of labor, parts and contract resources expected to be utilized. Certain events or changes in circumstances could negatively impact our key assumptions. Customer preferences may be impacted by changes in aviation fuel prices. Key customers, including ASI, DHL and the DoD may decide that they do not need as many aircraft as projected or may find alternative providers.
Self-Insurance
We self-insure certain claims related to workers’ compensation, aircraft, automobile, general liability and employee healthcare. We record a liability for reported claims and an estimate for incurred claims that have not yet been reported. Accruals for these claims are estimated utilizing historical paid claims data and recent claims trends. Changes in claim severity and frequency could result in actual claims being materially different than the costs provided for in our results of operations. We maintain excess claims coverage with common insurance carriers to mitigate our exposure to large claim losses.
Contingencies
We are involved in legal matters that have a degree of uncertainty associated with them. We continually assess the likely outcomes of these matters and the adequacy of amounts, if any, provided for these matters. There can be no assurance that the ultimate outcome of these matters will not differ materially from our assessment of them. There also can be no assurance that we know all matters that may be brought against us at any point in time.
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Income Taxes
We account for income taxes under the provisions of FASB ASC Topic 740-10 Income Taxes. The objectives of accounting for income taxes are to recognize the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in the Company’s financial statements or tax returns. Judgment is required in assessing the future tax consequences of events that have been recognized in the Company’s financial statements or tax returns. Fluctuations in the actual outcome of expected future tax consequences could materially impact the Company’s financial position or its results of operations.
The Company has significant deferred tax assets including net operating loss carryforwards (“NOL CFs”) for federal income tax purposes. Based upon projections of taxable income, we determined that it was more likely than not that the NOL CFs will be realized. Accordingly, we do not have an allowance against these deferred tax assets at this time.
We recognize the impact of a tax position if that position is more likely than not of being sustained on audit, based on the technical merits of the position.
Stock Warrants
The Company’s accounting for warrants issued to Amazon is determined in accordance with the financial reporting guidance for equity-based payments to non-employees and for financial instruments. The warrants issued to Amazon are recorded as a lease incentive asset using their fair value at the time that ASI has met its lease performance obligation. The lease incentive is amortized against revenues over the duration of related aircraft leases. The unexercised warrants are classified in liabilities and re-measured to fair value at the end of each reporting period, resulting in a non-operating gain or loss.
Post-retirement Obligations
The Company sponsors qualified defined benefit pension plans for ABX’s flight crewmembers and other eligible employees. The Company also sponsors non-qualified, unfunded excess plans that provide benefits to executive management and crewmembers that are in addition to amounts permitted to be paid through our qualified plans under provisions of the tax laws. Employees are no longer accruing benefits under any of the defined benefit pension plans. The Company also sponsors unfunded post-retirement healthcare plans for ABX’s flight crewmembers.
The accounting and valuation for these post-retirement obligations are determined by prescribed accounting and actuarial methods that consider a number of assumptions and estimates. The selection of appropriate assumptions and estimates is significant due to the long time period over which benefits will be accrued and paid. The long term nature of these benefit payouts increases the sensitivity of certain estimates on our post-retirement costs. In actuarially valuing our pension obligations and determining related expense amounts, key assumptions include discount rates, expected long term investment returns, retirement ages and mortality. Actual results and future changes in these assumptions could result in future costs that are materially different than those recorded in our annual results of operations.
Our actuarial valuation includes an assumed long term rate of return on pension plan assets of 5.65%. Our assumed rate of return is based on a targeted long term investment allocation of 30% equity securities, 65% fixed income securities and 5% cash. The actual asset allocation at December 31, 2021, was 28% equities, 69% fixed income and 3% cash. The pension trust includes less than $0.1 million of investments (less than 1% of the plans' assets) whose fair values have been estimated in the absence of readily determinable fair values. Such investments include private equity, hedge fund investments and real estate funds. Management’s estimates are based on information provided by the fund managers or general partners of those funds.
In evaluating our assumptions regarding expected long term investment returns on plan assets, we consider a number of factors, including our historical plan returns in connection with our asset allocation policies, assistance from investment consultants hired to provide oversight over our actively managed investment portfolio, and long term inflation assumptions. The selection of the expected return rate materially affects our pension costs. Our expected long term rate of return was 5.65% after analyzing expected returns on investment vehicles and considering our long term asset allocation expectations. Fluctuations in long-term interest rates can have an impact on the actual rate of return. If we were to lower our long term rate of return assumption by a hypothetical 100 basis points, expense in 2021 would be increased by approximately $8.3 million. We use a market value of assets as of the measurement date for determining pension expense.
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In selecting the interest rate to discount estimated future benefit payments that have been earned to date to their net present value (defined as the projected benefit obligation), we match the plan’s benefit payment streams to high-quality bonds of similar maturities. The selection of the discount rate not only affects the reported funded status information as of December 31 (as shown in Note I to the accompanying consolidated financial statements in this report), but also affects the succeeding year’s pension and post-retirement healthcare expense. The discount rates selected for December 31, 2021, based on the method described above, were 2.9% for crewmembers and 3.0% for non-crewmembers. If we were to lower our discount rates by a hypothetical 50 basis points, pension expense in 2021 would be increased by approximately $13.2 million.
Our mortality assumptions at December 31, 2021, reflect the most recent projections released by the Actuaries Retirement Plans Experience Committee, a committee within the Society of Actuaries, a professional association in North America. The assumed future increase in salaries and wages is not a significant estimate in determining pension costs because each defined benefit pension plan was frozen during 2009 with respect to additional benefit accruals.
The following table illustrates the sensitivity of the aforementioned assumptions on our pension expense, pension obligation and accumulated other comprehensive income (in thousands):
 Effect of change
  December 31, 2021
Change in assumption2021
Pension
expense
Pension obligationAccumulated
other
comprehensive
income (pre-tax)
100 basis point decrease in rate of return$8,312 $— $— 
50 basis point decrease in discount rate13,175 (51,249)51,249 
Aggregate effect of all the above changes21,487 (51,249)51,249 

New Accounting Pronouncements
For information regarding recently issued accounting pronouncements and the expected impact on our annual statements, see Note A "SUMMARY OF FINANCIAL STATEMENT PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES" in the accompanying notes to Consolidated Financial Statements included in Part II, Item 8 of this Form 10-K.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
The Company is exposed to market risk for changes in interest rates.
The Company has entered into interest rate swap instruments. As a result, future fluctuations in LIBOR interest rates will result in the recording of unrealized gains and losses on interest rate derivatives held by the Company. The combined notional values were $258.1 million as of December 31, 2021. See Note G in the accompanying consolidated financial statements in this report for a discussion of our accounting treatment for these hedging transactions.
As of December 31, 2021, the Company has $928.8 million of fixed interest rate debt and $360.0 million of variable interest rate debt outstanding. Variable interest rate debt exposes us to differences in future cash flows resulting from changes in market interest rates. Variable interest rate risk can be quantified by estimating the change in annual cash flows resulting from a hypothetical 20% increase in interest rates. A hypothetical 20% increase or decrease in interest rates would have resulted in a change in interest expense of approximately $1.0 million for the year ended December 31, 2021.
The convertible debt and Senior Notes issued at fixed interest rates are exposed to fluctuations in fair value resulting from changes in market interest rates. Fixed interest rate risk can be quantified by estimating the change in fair value of our long term convertible debt and Senior Note through a hypothetical 20% increase in interest rates. As of December 31, 2021, a 20% increase in interest rates would have decreased the book value of our fixed interest rate convertible debt and Senior Notes by approximately $35.0 million.
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The Company is exposed to concentration of credit risk primarily through cash deposits, cash equivalents, marketable securities and derivatives. As part of its risk management process, the Company monitors and evaluates the credit standing of the financial institutions with which it does business. The financial institutions with which it does business are generally highly rated. The Company is exposed to counterparty risk, which is the loss it could incur if a counterparty to a derivative contract defaulted.
As of December 31, 2021, the Company's liabilities reflected stock warrants issued to Amazon. The fair value of the stock warrants obligation is re-measured at the end of each reporting period and marked to market. The fair value of the stock warrants is dependent on a number of factors which change, including the Company's common stock price, the volatility of the Company’s common stock and the risk-free interest rate. See Note D in the accompanying consolidated financial statements in this report for further information about the fair value of the stock warrants.
The Company sponsors defined benefit pension plans and post-retirement healthcare plans for certain eligible employees. The Company's related pension expense, plans' funded status, and funding requirements are sensitive to changes in interest rates. The funded status of the plans and the annual pension expense is recalculated at the beginning of each calendar year using the fair value of plan assets, market-based interest rates at that point in time, as well as assumptions for asset returns and other actuarial assumptions. Higher interest rates could result in a lower fair value of plan assets and increased pension expense in the following years. At December 31, 2021, ABX's defined benefit pension plans had total investment assets of $850.2 million under investment management. See Note I in the accompanying consolidated financial statements in this report for further discussion of these assets.
The Company is exposed to market risk for changes in the price of jet fuel. The risk associated with jet fuel, however, is largely mitigated by reimbursement through the agreements with the Company's customers.
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ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
Index to Consolidated Financial Statements
 
 Page


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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Air Transport Services Group, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Air Transport Services Group, Inc. and subsidiaries (the "Company") as of December 31, 2021 and 2020, the related consolidated statements of operations, comprehensive income, cash flows, and stockholders' equity, for each of the three years in the period ended December 31, 2021, and the related notes and the schedule listed in the Index at Item 15(a)(2) (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021, in conformity with accounting principles generally accepted in the United States of America.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated March 1, 2022, expressed an unqualified opinion on the Company's internal control over financial reporting.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Critical Audit Matter
The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.
Stock warrants - Remeasurement and Reclassification - Refer to Note C to the Financial Statements
Critical Audit Matter Description
In conjunction with a lease incentive agreement entered into with a customer on December 20, 2018, the Company conditionally granted to the customer warrants to purchase Company common stock, which vest as additional aircraft leases are executed. In May 2020, the customer agreed to lease 12 additional aircraft from the Company. The first of these leases began in the second quarter of 2020 with the remaining 11 delivered in 2021. Pursuant to the 2018 Investment Agreement, as a result of leasing 12 aircraft, the customer was issued warrants for 7.0 million common shares, all of which have vested.
Stock warrant liabilities are remeasured and reclassified to paid-in-capital once all the vesting conditions are satisfied for a single unit of account (a “warrant tranche”), and the total notional amount of the warrants becomes fixed and exercisable for that warrant tranche. In December 2021, upon execution of the twelfth and final aircraft lease of the May 2020 commitment, warrants for 7.0 million shares were remeasured, and their fair value of $82.4 million was reclassified from balance sheet liabilities to paid-in-capital.
We identified the remeasurement and reclassification of stock warrant liabilities to paid-in-capital as a critical audit matter because (1) the remeasurement was material to the financial statements, and (2) it involved a high degree of
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auditor judgment and an increased extent of effort to audit and evaluate the significant inputs and valuation methodology used, including the need to involve fair value specialists.
How the Critical Audit Matter Was Addressed in the Audit
Our audit procedures related to the remeasurement and reclassification of stock warrant liabilities to paid-in-capital included:
We tested the effectiveness of management’s controls over the valuation of the stock warrant liabilities remeasurement and reclassification, which included a control over the significant inputs.
We evaluated each warrant tranche to test that vesting conditions were satisfied prior to reclassification to paid-in-capital.
We assessed the consistency by which management has applied assumptions to the significant inputs.
With the assistance of our fair value specialists, we evaluated the reasonableness of (1) the valuation methodology, which included testing the mathematical accuracy of the calculation; (2) the expected volatility, which included developing an independent estimate and comparing that to the expected volatility selected by management; and (3) the risk-free interest rate, which included testing the mathematical accuracy of management's risk-free interest rate assumptions.
/s/ Deloitte & Touche LLP
Cincinnati, Ohio
March 1, 2022

We have served as the Company's auditor since 2002.
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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(In thousands, except share data)
 December 31,December 31,
 20212020
ASSETS
CURRENT ASSETS:
Cash, cash equivalents and restricted cash$69,496 $39,719 
Accounts receivable, net of allowance of $742 in 2021 and $997 in 2020205,399 153,511 
Inventory49,204 40,410 
Prepaid supplies and other28,742 39,096 
TOTAL CURRENT ASSETS352,841 272,736 
Property and equipment, net2,129,934 1,939,776 
Customer incentive102,913 126,007 
Goodwill and acquired intangibles505,125 516,290 
Operating lease assets62,644 68,824 
Other assets113,878 78,112 
TOTAL ASSETS$3,267,335 $3,001,745 
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable$174,237 $141,425 
Accrued salaries, wages and benefits56,652 56,506 
Accrued expenses14,950 19,005 
Current portion of debt obligations628 13,746 
Current portion of lease obligations18,783 17,784 
Unearned revenue and grants47,381 53,522 
TOTAL CURRENT LIABILITIES312,631 301,988 
Long term debt1,298,735 1,465,331 
Stock warrant obligations915 103,474 
Post-retirement obligations21,337 35,099 
Long term lease obligations44,387 51,128 
Other liabilities49,662 47,963 
Deferred income taxes217,291 141,265 
TOTAL LIABILITIES1,944,958 2,146,248 
Commitments and contingencies (Note H)
STOCKHOLDERS’ EQUITY:
Preferred stock, 20,000,000 shares authorized, including 75,000 Series A Junior Participating Preferred Stock— — 
Common stock, par value $0.01 per share; 150,000,000 shares authorized; 74,142,183 and 59,560,036 shares issued and outstanding in 2021 and 2020, respectively741 596 
Additional paid-in capital1,074,286 855,547 
Retained earnings309,430 78,010 
Accumulated other comprehensive loss(62,080)(78,656)
TOTAL STOCKHOLDERS’ EQUITY1,322,377 855,497 
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY$3,267,335 $3,001,745 
See notes to consolidated financial statements.
47


AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share data)
 Year Ended December 31
 202120202019
REVENUES$1,734,282 $1,570,575 $1,452,183 
OPERATING EXPENSES
Salaries, wages and benefits591,280 518,961 433,518 
Depreciation and amortization308,448 278,067 257,532 
Maintenance, materials and repairs173,364 179,315 170,151 
Fuel173,600 148,383 155,033 
Contracted ground and aviation services75,724 63,564 64,076 
Travel86,601 77,382 90,993 
Landing and ramp14,244 12,468 11,184 
Rent23,695 19,299 16,006 
Insurance12,588 9,903 7,342 
Other operating expenses65,179 64,999 68,978 
Government grants(111,673)(47,231)— 
Impairment of aircraft and related assets— 39,075 — 
Transaction fees— — 373 
1,413,050 1,364,185 1,275,186 
OPERATING INCOME321,232 206,390 176,997 
OTHER INCOME (EXPENSE)
Interest income39 222 370 
Non-service component of retiree benefit (costs) gains17,827 12,032 (9,404)
Debt issuance costs(6,505)— — 
Net gain (loss) on financial instruments29,979 (100,771)(12,302)
Loss from non-consolidated affiliate(2,577)(13,587)(17,445)
Interest expense(58,790)(62,893)(66,644)
(20,027)(164,997)(105,425)
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES301,205 41,393 71,572 
INCOME TAX EXPENSE(72,225)(16,314)(11,589)
EARNINGS FROM CONTINUING OPERATIONS228,980 25,079 59,983 
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES2,440 7,036 1,219 
NET EARNINGS$231,420 $32,115 $61,202 
BASIC EARNINGS PER SHARE
Continuing operations$3.33 $0.42 $1.02 
Discontinued operations0.03 0.12 0.02 
TOTAL BASIC EARNINGS PER SHARE$3.36 $0.54 $1.04 
DILUTED EARNINGS PER SHARE
Continuing operations$2.80 0.42 $0.78 
Discontinued operations0.03 0.12 0.01 
TOTAL DILUTED EARNINGS PER SHARE$2.83 0.54 $0.79 
WEIGHTED AVERAGE SHARES
Basic68,853 59,128 58,899 
Diluted76,216 59,931 69,348 

See notes to consolidated financial statements.
48


AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(In thousands)
Years Ended December 31
202120202019
NET EARNINGS$231,420 $32,115 $61,202 
OTHER COMPREHENSIVE INCOME (LOSS):
Defined Benefit Pension16,262 (16,941)27,890 
Defined Benefit Post-Retirement320 153 139 
Foreign Currency Translation(6)(2)1,467 
TOTAL COMPREHENSIVE INCOME, net of tax$247,996 $15,325 $90,698 

See notes to consolidated financial statements.

49


AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)
Years Ended December 31
 202120202019
OPERATING ACTIVITIES:
Net earnings from continuing operations$228,980 $25,079 $59,983 
Net earnings from discontinued operations2,440 7,036 1,219 
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization341,849 310,317 285,353 
Pension and post-retirement7,244 3,888 15,700 
Deferred income taxes70,544 18,492 10,478 
Amortization of stock-based compensation7,386 7,477 7,002 
Loss from non-consolidated affiliates2,577 13,587 17,445 
Net (gain) loss on financial instruments(29,979)100,771 12,302 
Debt issuance costs6,505 — — 
Impairment of aircraft and related assets— 39,075 — 
Changes in assets and liabilities:
Accounts receivable(51,888)9,359 (14,551)
Inventory and prepaid supplies(3,123)(27,825)(6,493)
Accounts payable30,388 5,584 3,340 
Unearned revenue(7,011)36,922 1,446 
Accrued expenses, salaries, wages, benefits and other liabilities10,059 (5,226)13,390 
Pension and post-retirement balances(26,884)(28,198)(12,132)
Other(5,530)(4,036)2,456 
NET CASH PROVIDED BY OPERATING ACTIVITIES583,557 512,302 396,938 
INVESTING ACTIVITIES:
Expenditures for property and equipment(504,748)(510,417)(453,502)
Proceeds from property and equipment19,427 24,583 10,804 
Acquisitions and investments in businesses, net of cash acquired (2,155)(13,333)(24,360)
NET CASH (USED IN) INVESTING ACTIVITIES(487,476)(499,167)(467,058)
FINANCING ACTIVITIES:
Principal payments on long term obligations(1,900,311)(689,380)(39,500)
Proceeds from revolving credit facilities1,500,600 180,000 100,018 
Payments for financing costs(3,099)(7,507)(1,081)
Proceeds from bond issuance207,400 500,000 — 
Proceeds from issuance of warrants131,967 — — 
Withholding taxes paid for conversion of employee stock awards(2,861)(2,730)(2,438)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES(66,304)(19,617)56,999 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS29,777 (6,482)(13,121)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR39,719 46,201 59,322 
CASH AND CASH EQUIVALENTS AT END OF YEAR$69,496 $39,719 $46,201 
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized$43,696 $41,343 $57,546 
Federal and state income taxes paid$3,431 $1,139 $1,294 
SUPPLEMENTAL NON-CASH INFORMATION:
Accrued expenditures for property and equipment$43,479 $37,880 $38,396 
See notes to consolidated financial statements.
50


AIR TRANSPORT SERVICES GROUP, INC.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY
(In thousands, except share data)
 Common StockAdditional
Paid-in
Capital
Accumulated Earnings (Deficit)Accumulated
Other
Comprehensive
Income (Loss)
Total
 NumberAmount
BALANCE AT DECEMBER 31, 201859,134,173 $591 $471,158 $56,051 $(91,362)$436,438 
Stock-based compensation plans
Grant of restricted stock151,300 (2)— 
Issuance of common shares, net of withholdings46,958 — (2,438)(2,438)
Forfeited restricted stock(3,000)— — — 
Cumulative effect in change in accounting principle(71,358)(71,358)
Amortization of stock awards and restricted stock7,002 7,002 
Total comprehensive income61,202 29,496 90,698 
BALANCE AT DECEMBER 31, 201959,329,431 $593 $475,720 $45,895 $(61,866)$460,342 
Stock-based compensation plans
Grant of restricted stock201,400 (2)— 
Issuance of common shares, net of withholdings31,005 (2,731)(2,730)
Forfeited restricted stock(1,800)— — — 
Reclassification of warrant liability375,083 375,083 
Amortization of stock awards and restricted stock7,477 7,477 
Total comprehensive income (loss)32,115 (16,790)15,325 
BALANCE AT DECEMBER 31, 202059,560,036 $596 $855,547 $78,010 $(78,656)$855,497 
Stock-based compensation plans
Grant of restricted stock121,339 (1)— 
Issuance of common shares, net of withholdings35,163 — (2,861)(2,861)
Forfeited restricted stock(2,800)— — — 
Conversion of warrants14,428,445 144 131,823 131,967 
Reclassification of warrant liability82,392 82,392 
Amortization of stock awards and restricted stock7,386 7,386 
Total comprehensive income231,420 16,576 247,996 
BALANCE AT DECEMBER 31, 202174,142,183 $741 $1,074,286 $309,430 $(62,080)$1,322,377 

See notes to consolidated financial statements.

51


AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE A—SUMMARY OF FINANCIAL STATEMENT PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations
Air Transport Services Group, Inc. is a holding company whose subsidiaries lease aircraft and provide contracted airline operations as well as other support services mainly to the air transportation, e-commerce and package delivery industries.
The Company's leasing subsidiary, Cargo Aircraft Management, Inc. (“CAM”), leases aircraft to each of the Company's airlines as well as to non-affiliated airlines and other lessees. The Company's airlines, ABX Air, Inc. (“ABX”), Air Transport International, Inc. (“ATI”) and Omni Air International, LLC ("OAI" ) each have the authority, through their separate U.S. Department of Transportation ("DOT") and Federal Aviation Administration ("FAA") certificates, to transport cargo worldwide. The Company provides a combination of aircraft, crews, maintenance and insurance services for a customer's transportation network through customer "CMI" and "ACMI" agreements and through charter contracts in which aircraft fuel is also included.
In addition to its aircraft leasing and airline services, the Company offers a range of complementary services to delivery companies, freight forwarders, airlines and government customers. These include aircraft maintenance and modification services, aircraft parts, equipment maintenance services and load transfer and package sorting services for customers.
Basis of Presentation
The accompanying consolidated financial statements include the accounts of Air Transport Services Group, Inc. and its wholly-owned subsidiaries. Inter-company balances and transactions are eliminated. The consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP").
Investments in affiliates in which the Company has significant influence but does not exercise control are accounted for using the equity method of accounting. Under the equity method, the Company’s share of the nonconsolidated affiliate's income or loss is recognized in the consolidated statement of earnings and cumulative post-acquisition changes in the investment are adjusted against the carrying amount of the investment. Investments in affiliates in which the Company does not exercise control or have significant influence are reflected at cost less impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.
Use of Estimates
The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in the consolidated financial statements. Estimates and assumptions are used to record allowances for uncollectible amounts, self-insurance reserves, spare parts inventory, depreciation and impairments of property, equipment, goodwill and intangibles, stock warrants and other financial instruments, post-retirement obligations, income taxes, contingencies and litigation. Changes in estimates and assumptions may have a material impact on the consolidated financial statements.

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COVID-19 Uncertainties
Beginning in late 2019, an outbreak of a coronavirus, COVID-19, was identified and has since spread globally, becoming a pandemic. The pandemic has had an impact on the Company's operations and financial results. Beginning in late February 2020, revenues were disrupted when customers cancelled scheduled passenger flights and aircraft maintenance services and the Company began to incur additional costs, including expenses to protect employees. Additionally, the Company experienced disruptions to operations, such as shortages of personnel, shortages of parts, maintenance delays, shortages of transportation and hotel accommodations for flight crews, facility closures and other issues. Currently, the pandemic has not had a significant adverse financial impact on the Company's leasing operations or its airline operations for customers' freight networks.
Cash and Cash Equivalents
The Company classifies short-term, highly liquid investments with maturities of three months or less at the time of purchase as cash and cash equivalents. These investments, consisting of money market funds, are recorded at cost, which approximates fair value. Substantially all deposits of the Company’s cash are held in accounts that exceed federally insured limits. The Company deposits cash in common financial institutions which management believes are financially sound.
Cash includes restricted cash of $5.9 million as of December 31, 2021 and $0.4 million as of December 31, 2020. Restricted cash consists of customers’ deposits held in an escrow account as required by DOT regulations. The cash is restricted to the extent of customers’ deposits on flights not yet flown. Restricted cash is released from escrow upon completion of specific flights, which are scheduled to occur within the twelve months.
Accounts Receivable and Allowance for Uncollectible Accounts
The Company's accounts receivable is primarily due from its significant customers (see Note C), other airlines, delivery companies and freight forwarders. The Company estimates expected credit losses over the lifetime of the customer receivables that are not past due. The Company also performs a quarterly evaluation of the accounts receivable and the allowance for uncollectible accounts by reviewing specific customers' recent payment history, growth prospects, financial condition and other factors that may impact a customer's ability to pay. The Company establishes allowances for amounts that are not expected to be received. Account balances are written off against the allowances when the Company ceases collection efforts.
Inventory
The Company’s inventory is comprised primarily of expendable aircraft parts and supplies used for aircraft maintenance. Inventory is generally charged to expense when issued for use on a Company aircraft. The Company values its inventory of aircraft parts and supplies at weighted-average cost and maintains a related obsolescence reserve. The Company records an obsolescence reserve on a base stock of inventory. The Company monitors the usage rates of inventory parts and segregates parts that are technologically outdated or no longer used in its fleet types. Slow moving and segregated items are actively marketed and written down to their estimated net realizable values based on market conditions.
Management analyzes the inventory reserve for reasonableness at the end of each quarter. That analysis includes consideration of the expected fleet life, amounts expected to be on hand at the end of a fleet life, and recent events and conditions that may impact the usability or value of inventory. Events or conditions that may impact the expected life, usability or net realizable value of inventory include additional aircraft maintenance directives from the FAA, changes in DOT regulations, new environmental laws and technological advances.
Goodwill and Intangible Assets
The Company assesses, during the fourth quarter of each year, the carrying value of goodwill. The assessment requires an estimation of fair value of each reporting unit that has goodwill. The goodwill impairment test requires a comparison of the fair value of the reporting unit to its respective carrying value. If the carrying value of a reporting unit is less than its fair value no impairment exists. If the carrying amount of a reporting unit is higher than its fair value an impairment loss is recorded for the difference and charged to operations.
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The Company assesses, during the fourth quarter of each year, whether it is more likely than not that an indefinite-lived intangible asset is impaired by considering all relevant events and circumstances that could affect the significant inputs used to determine the fair value of the indefinite-lived intangible asset.
The Company also conducts impairment assessments of goodwill, indefinite-lived intangible assets and finite-lived intangible assets whenever events or changes in circumstance indicate an impairment may have occurred. Finite-lived intangible assets are amortized over their estimated useful economic lives.
Property and Equipment
Property and equipment held for use is stated at cost, net of any impairment recorded. The Company accounts for planned major airframe and engine maintenance costs using the built-in overhaul method for the aircraft it owns, except the costs of airframe maintenance for Boeing 767-200 aircraft operated by ABX which are expensed as they are incurred. Under the built-in overhaul method, costs of planned airframe maintenance and engine overhauls are capitalized and depreciated by the Company's airlines over the expected period until the next scheduled major maintenance event is required. Major, non-scheduled airframe and engine maintenance costs that extend the life of the asset are also capitalized. The capitalized costs of airframe maintenance and engine overhauls for aircraft leased to customers, are depreciated over the life of the lease with consideration for the customer's return obligations.
Scheduled maintenance for the aircraft engines, including Boeing 777 and Boeing 757 aircraft, are typically contracted to service providers on a time and material basis and the costs of those engine overhauls are capitalized and amortized over the life of the overhaul. Certain engines that power the Boeing 767 aircraft are maintained under "power by the cycle" agreements with engine maintenance providers. Under these agreements, the engines are maintained by the service provider for a fixed fee per cycle. As a result, the cost of maintenance for these engines is generally expensed as flights occur and the initial engine overhaul value is depreciated over the life of the engine. In September of 2021, a power by the cycle maintenance agreement for many of the Company's Boeing 767-200 engines expired. As a result, the Company began to depreciate the remaining carrying value of these engine overhauls over the time remaining until the next overhaul. This resulted in additional depreciation expense of $2.1 million before the effects income taxes during 2021.
Property and equipment is depreciated over an asset's estimated useful life, or if related to a lease, over the lesser of the asset’s useful life or lease term. Assets are typically depreciated on a straight-line basis except for certain engines which are depreciated based on their usage levels during the period.
Depreciable lives are summarized as follows:
Boeing 777, 767 and 757 aircraft and flight equipment7 to 18 years
Ground equipment2 to 10 years
Leasehold improvements, facilities and office equipment3 to 25 years
The Company periodically evaluates the useful lives, salvage values and fair values of property and equipment. Acceleration of depreciation expense or the recording of significant impairment losses could result from changes in the estimated useful lives of assets due to a number of reasons, such as excess aircraft capacity or changes in regulations governing the use of aircraft.
The cost and accumulated depreciation of disposed property and equipment and expired major maintenance are removed from the accounts with any related gain or loss reflected in earnings from operations.
For aircraft leased from external lessors, the Company may be required to make periodic payments to the lessor under certain aircraft leases for future maintenance events such as engine overhauls and major airframe maintenance. Such payments are recorded as deposits until drawn for qualifying maintenance costs. The maintenance costs are expensed or capitalized in accordance with the airline's accounting policy for major airframe and engine maintenance. The Company evaluates at the balance sheet date, whether it is probable that an amount on deposit will be returned by the lessor to reimburse the costs of the maintenance activities. When it is less than probable that a deposit will be returned, it is recognized as additional maintenance expense. 
Aircraft and other long-lived assets are tested for impairment when circumstances indicate the carrying value of the assets may not be recoverable. To conduct impairment testing, the Company groups assets and liabilities at the lowest level for which identifiable cash flows are largely independent of cash flows of other assets and liabilities.
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For assets that are to be held and used, impairment is recognized when the estimated undiscounted cash flows associated with the asset group are less than the carrying value. If impairment exists, an adjustment is recorded to write the assets down to fair value, and a loss is recorded as the difference between the carrying value and fair value. Fair values are determined considering quoted market values, discounted cash flows or internal and external appraisals, as applicable. For assets held for sale, impairment is recognized when the fair value less the cost to sell the asset is less than the carrying value.
Capitalized Interest
Interest costs incurred while aircraft are being modified are capitalized as an additional cost of the aircraft. Capitalized interest was $3.5 million, $2.8 million and $3.7 million for the years ended December 31, 2021, 2020 and 2019, respectively.
Discontinued Operations
A business component whose operations are discontinued is reported as discontinued operations if the cash flows of the component have been eliminated from the ongoing operations of the Company and represents a strategic shift that had a major impact on the Company. The results of discontinued operations are aggregated and presented separately in the consolidated statements of operations.
Self-Insurance
The Company is self-insured for certain workers’ compensation, employee healthcare, automobile, aircraft, and general liability claims. The Company maintains excess claim coverage with common insurance carriers to mitigate its exposure to large claim losses. The Company records a liability for reported claims and an estimate for incurred claims that have not yet been reported. Accruals for these claims are estimated utilizing historical paid claims data and recent claims trends. Other liabilities included $6.1 million and $9.3 million at December 31, 2021 and December 31, 2020, respectively, for self-insured reserves. Changes in claim severity and frequency could result in actual claims being materially different than the costs accrued.
Pension and Post-Retirement Benefits
The funded status of any of the Company's defined benefit pension or post-retirement health care plans is the difference between the fair value of plan assets and the accumulated benefit obligations to plan participants. The over funded or underfunded status of a plan is reflected in the consolidated balance sheet as an asset for over funded plans, or as a liability for underfunded plans.
The funded status is ordinarily re-measured annually at year end using the fair value of plans assets, market based discount rates and actuarial assumptions. Changes in the funded status of the plans as a result of re-measuring plan assets and benefit obligations, are recorded to accumulated comprehensive loss and amortized into expense using a corridor approach. The Company's corridor approach amortizes into earnings variances in plan assets and benefit obligations that are a result of the previous measurement assumptions when the net deferred variances exceed 10% of the greater of the market value of plan assets or the benefit obligation at the beginning of the year. The amount in excess of the corridor is amortized over the average remaining service period to retirement date of active plan participants. Cost adjustments for plan amendments are also deferred and amortized over the expected working life or the life expectancy of plan participants. Irrevocable settlement transactions that relieve the Company from responsibilities of providing retiree benefits and significantly eliminate the Company's related risk may result in recognition of gains or losses from accumulated other comprehensive loss. The plan's investment returns, interest expense, settlements and other non-service cost components of retiree benefits are reported in other income and expense included in earnings before income taxes.
Customer Security and Maintenance Deposits
The Company's customer leases typically obligate the lessee to maintain the Company's aircraft in compliance with regulatory standards for flight and aircraft maintenance. The Company may require an aircraft lessee to pay a security deposit or provide a letter of credit until the expiration of the lease. Additionally, the Company's leases may require a lessee to make monthly payments toward future expenditures for scheduled heavy maintenance events.
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The Company records security and maintenance deposits in other liabilities. If a lease requires monthly maintenance payments, the Company is typically required to reimburse the lessee for costs they incur for scheduled heavy maintenance events after completion of the work and receipt of qualifying documentation. Reimbursements to the lessee are recorded against the previously paid maintenance deposits.
Income Taxes
Income taxes have been computed using the asset and liability method, under which deferred income taxes are provided for the temporary differences between the financial reporting basis and the tax basis of the Company’s assets and liabilities. Deferred taxes are measured using provisions of currently enacted tax laws. A valuation allowance against net deferred tax assets is recorded when it is more likely than not that such assets will not be fully realized. Tax credits are accounted for as a reduction of income taxes in the year in which the credit originates. All deferred income taxes are classified as noncurrent in the statement of financial position.
The Company recognizes the benefit of a tax position taken on a tax return, if that position is more likely than not of being sustained on audit, based on the technical merits of the position. An uncertain income tax position is not recognized if it has less than a 50% likelihood of being sustained. The Company recognizes interest and penalties accrued related to uncertain tax positions in operating expense.
Purchase of Common Stock
The Company's Board of Directors has authorized management to repurchase outstanding common stock of the Company from time to time on the open market or in privately negotiated transactions. The authorization does not require the Company to repurchase a specific number of shares and the Company may terminate the repurchase program at any time. Upon the retirement of common stock repurchased, the excess purchase price over the par value for retired shares of common stock is recorded to additional paid-in-capital.
As described in Note H, the Company is prohibited from repurchasing its common shares through September 30, 2022.
Stock Warrants
The Company’s accounting for warrants issued to a lessee is determined in accordance with the financial reporting guidance for equity-based payments to non-employees and for financial instruments. The warrants issued to a lessee are recorded as a lease incentive asset using their fair value at the time of issuance. The lease incentive is amortized against revenues over the duration of related aircraft leases. The unexercised warrants that are classified in liabilities are re-measured to fair value at the end of each reporting period, resulting in a non-operating gain or loss.
Comprehensive Income
Comprehensive income includes net earnings and other comprehensive income or loss. Other comprehensive income or loss results from certain changes in the Company’s liabilities for pension and other post-retirement benefits, gains and losses associated with interest rate hedging instruments and fluctuations in currency exchange rates related to the foreign affiliate.
Fair Value Information
Assets or liabilities that are required to be measured at fair value are reported using the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. FASB ASC Topic 820-10 Fair Value Measurements and Disclosures establishes three levels of input that may be used to measure fair value:
 
Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. 
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Level 2: Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. 
Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include items where the determination of fair value requires significant management judgment or estimation.
Revenue Recognition
Aircraft and engine lease revenues are recognized as operating lease revenues on a straight-line basis over the term of the applicable lease agreements. Customer payments for leased aircraft and equipment are typically paid monthly in advance.
Revenues from contracts with customers are recognized under Accounting Standards Codification “Revenue from Contracts with Customers (Topic 606) ("ASC 606") to depict the transfer of goods or services to a customer at an amount that reflects the consideration the Company expects to receive in exchange for those goods or services. ACMI Services revenues are generated from airline service agreements and are typically based on hours or miles flown, the amount of aircraft operated and crew resources provided during a month. ACMI Services revenues are usually recognized over time using the invoice practical expedient based on the number of hours or miles operated and the number of crews and aircraft required for scheduled flights during the period. Certain agreements include provisions for incentive payments based upon on-time reliability. These incentives are measured on a monthly basis and recorded to revenue in the corresponding month earned. Under CMI agreements, the Company's airlines have an obligation to provide integrated services including flight crews, aircraft maintenance and insurance for the customer's cargo network. Under ACMI agreements, the Company's airlines are also obligated to provide aircraft. Under CMI and ACMI agreements, customers are generally responsible for aviation fuel, landing fees, navigation fees and certain other flight expenses. When functioning as the customers' agent for arranging such services, the Company records amounts reimbursable from the customer as revenues net of the related expenses as the costs are incurred. Under charter agreements, the Company's airline is obligated to provide full services for one or more flights having specific origins and destinations. Under charter agreements in which the Company's airline is responsible for fuel, airport fees and all flight services, the related costs are recorded in operating expenses. Any sales commissions paid for charter agreements are generally expensed when incurred because the amortization period is less than one year. There are no customer rewards programs associated with services offered by the Company nor does the Company sell passenger tickets or issue freight bills. Customers for ACMI Services are invoiced monthly or more frequently.
The Company's revenues for customer contracts for airframe maintenance and aircraft modification services that do not have an alternative use and for which the Company has an enforceable right to payment are generally recognized over time based on the percentage of costs completed. Services for airframe maintenance and aircraft modifications typically have project durations lasting a few weeks to several months. Other revenues for aircraft part sales, component repairs and line service are recognized at a point in time typically when the parts are delivered to the customer and the services are completed. For airframe maintenance, aircraft modifications and aircraft component repairs, contracts include assurance warranties that are not sold separately.
The Company records revenue based on the estimated transaction price for its airframe maintenance and aircraft modification contracts using the costs to costs input method. For such services, the Company estimates the earnings on a contract as the difference between the expected revenue and estimated costs to complete a contract and recognizes revenues and earnings based on the proportion of costs incurred compared to the total estimated costs. Unexpected or abnormal costs that are not reflected in the price of a contract are excluded from calculations of progress toward contract obligations. The Company's estimates consider the timing and extent of the services, including the amount and rates of labor, materials and other resources required to perform the services. These production costs are specifically planned and monitored for regulatory compliance. The expenditure of these costs closely reflect the progress made toward completion of an airframe maintenance and aircraft modification project. The Company recognizes adjustments in estimated earnings on a contract under the cumulative catch-up method in which the impact of the adjustment on estimated earnings of a contract is recognized in the period the adjustment is identified.
In 2021, the Company began to offer engine power coverage under separate customer contracts with certain lessees of CAM's General Electric powered Boeing 767-200 aircraft. Under this service, the Company is
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responsible for providing and maintaining engines to its lease customers as needed through a pool of engines. Revenues generated from engine power coverage contracts are recognized over time using the invoice practical expedient as engines are operated. Additionally, the Company acts as an agent for certain performance obligations for engine maintenance contracts with customers and recognizes the net amount of consideration retained. The transaction price for certain engine maintenance contracts are estimated and adjusted based upon expected engine cycles over the term of the contract and the estimated value of parts required for future services.
The Company's ground services revenues include load transfer and sorting services, facility and equipment maintenance services. These revenues are recognized as the services are performed for the customer over time. Revenues from related facility and equipment maintenance services are recognized over time and at a point in time depending on the nature of the customer contracts.
For customers that are not a governmental agency or department, the Company generally receives partial payment in advance of services, otherwise customer balances are typically paid within 30 to 60 days of service.
Accounting Standards Updates
Effective January 1, 2019, the Company adopted the FASB's ASU No. 2016-02, “Leases (Topic 842)” which superseded previous lease guidance ASC 840, Leases. Topic 842 is a new lease model that requires a company to recognize right-of-use (“ROU”) assets and lease liabilities on the balance sheet. The Company adopted the standard using the modified retrospective approach that does not require the restatement of prior year financial statements. The adoption of Topic 842 did not have a material impact on the Company’s consolidated statement of operations and consolidated statement of cash flows. The adoption of Topic 842 resulted in the recognition of ROU assets and corresponding lease liabilities as of January 1, 2019 in the amount of $52.6 million for leases classified as operating leases. Topic 842 also applies to the Company's aircraft lease revenues, however, the adoption of Topic 842 did not have a significant impact on the Company's accounting for its customer lease agreements.
The Company adopted the package of practical expedients and transition provisions available for expired or existing contracts, which allowed the Company to carryforward its historical assessments of 1) whether contracts are or contain leases, 2) lease classification, and 3) initial direct costs. Additionally, for real estate leases, the Company adopted the practical expedient that allows lessees to treat the lease and non-lease components of leases as a single lease component. The Company also elected the hindsight practical expedient to determine the reasonably certain lease term for existing leases. Further, the Company elected the short-term lease exception policy, permitting it to exclude the recognition requirements for leases with terms of 12 months or less. See Note I for additional information about leases.
In February 2018, the FASB issued ASU No. 2018-02 “Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income" ("ASU 2018-02"). ASU 2018-02 amends ASC 220, Income Statement - Reporting Comprehensive Income, to allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from U.S. federal tax legislation known as the Tax Cuts and Jobs Act. ASU 2018-02 is effective for years beginning after December 15, 2018 and interim periods within those fiscal years. The Company elected to retain stranded tax effects in accumulated other comprehensive income.
In June 2018, the FASB issued ASU No. 2018-07 “Improvements to Non-employee Share-based Payment Accounting" ("ASU 2018-07"). ASU 2018-07 amends ASC 718, "Compensation - Stock Compensation" ("ASC 718"), with the intent of simplifying the accounting for share-based payments granted to non-employees for goods and services and aligning the accounting for share-based payments granted to non-employees with the accounting for share-based payments granted to employees. The Company adopted ASU 2018-07 on January 1, 2019 using the modified retrospective approach as required. ASU 2018-07 replaced ASC 505-50, "Equity-Based Payments to Nonemployees" ("ASC 505-50") which was previously applied by the Company for warrants granted to Amazon.com, Inc. ("Amazon") as customer incentives. As a result of ASU 2018-07, the Company applied accounting guidance for financial instruments to the unvested warrants conditionally granted to Amazon in conjunction with an investment agreement reached with Amazon on December 22, 2018. Applying ASU 2018-07 as of January 1, 2019, through the modified retrospective approach, resulted in the recognition of $176.9 million for unvested warrant liabilities, $100.1 million for customer incentive assets and cumulative-effect adjustments of $71.4 million, net of tax, to reduce retained earnings for customer incentives that were not probable of being realized. The adoption of ASU 2018-07 on January 1, 2019 did not have an impact on the accounting for vested warrants.
The Company adopted "Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments" ("ASU 2016-13") on January 1, 2020. Under ASU 2016-13, an entity is required to utilize an
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“expected credit loss model” on certain financial instruments, including trade receivables. This model requires an entity to estimate expected credit losses over the lifetime of the financial asset including trade receivables that are not past due. Operating lease receivables are not within the scope of Topic 326. The Company's adoption of ASU 2016-13 did not have a material impact on the consolidated financial statements or related disclosures.
In August 2020, the FASB issued ASU No. 2020-06, "Accounting for Convertible Instruments and Contracts in an Entity's Own Equity" ("ASU 2020-06"). This new standard removes the separation models for convertible debt with cash conversion or beneficial conversion features. It eliminates the "treasury stock" method for convertible instruments and requires application of the “if-converted” method for certain agreements. The Company adopted ASU 2020-06 on January 1, 2022 using the modified retrospective approach which is expected to result in the following adjustments:
(in thousands)December 31, 2021Adoption of ASU 2020-06January 1, 2022
Balance Sheet line item:
Net deferred tax asset— $5,527 $5,527 
Convertible notes$(231,646)$(24,215)$(255,861)
Additional paid-in capital$(1,074,286)$39,559 $(1,034,727)
Retained earnings$(309,430)$(20,871)$(330,301)
After adopting ASU 2020-06, the Company's Convertible Notes due 2024 will be reflected entirely as a liability as the embedded conversion feature is no longer separately presented within stockholders' equity, which will also eliminate the non-cash discount. Accordingly, the Company expects that earnings will no longer reflect the discount amortization expense which was $6.4 million of interest expense, net of income taxes during 2021. After giving effect for the adoption, the effective interest rate on the Convertible Senior Notes is 1.5%.
ASU 2020-06 requires the application of the more dilutive if-converted method when calculating the impact of the Convertible Notes on earnings per diluted share. The adoption of ASU 2020-06 does not change the treatment of shares to be delivered by the convertible note hedges (see Note F) purchased by the Company that are designed to offset the shares issued to settle its Convertible Notes, which are anti-dilutive and not reflected in earning per diluted share. Accordingly, although the new guidance will not impact the Company's past or future net cash flows, we anticipate that the adoption will result in a reduction in reported earnings per diluted share.

NOTE B—GOODWILL, INTANGIBLES AND EQUITY INVESTMENTS
On November 9, 2018, the Company acquired OAI, its aircraft fleet and related companies, collectively referred to as "Omni." The purchase price was allocated to tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The excess purchase price over the estimated fair value of net assets acquired was recorded as goodwill. Identified intangible assets included OAI's certificated authority granted by the FAA to operate as an airline and OAI's long term customer relationships.
On February 1, 2019, the Company acquired a group of companies under common control, referred to as TriFactor. TriFactor resells material handling equipment and provides engineering design solutions for warehousing, retail distribution and e-commerce operations. Revenues and operating expenses include the activities of TriFactor for periods since its acquisition by the Company. The excess purchase price over the estimated fair value of net assets acquired was recorded as goodwill. The acquisition of TriFactor did not have a significant impact on the Company's financial statements or results of operations.

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As of December 31, 2021, 2020 and 2019, the goodwill amounts for reporting units that have goodwill were separately tested for impairment. To perform the goodwill impairment test, the Company determined the fair value of the reporting units using industry market multiples and discounted cash flows utilizing a market-derived cost of capital (level 3 fair value inputs). The goodwill amounts were not impaired. The carrying amounts of goodwill are as follows (in thousands):
CAMACMI ServicesAll OtherTotal
Carrying value as of December 31, 2019$153,290 $234,571 $8,113 $395,974 
Carrying value as of December 31, 2020$153,290 $234,571 $8,113 $395,974 
Carrying value as of December 31, 2021$153,290 $234,571 $8,113 $395,974 
The Company's acquired intangible assets are as follows (in thousands):
AirlineAmortizing
CertificatesIntangiblesTotal
Carrying value as of December 31, 2019$9,000 $122,680 $131,680 
Amortization— (11,364)(11,364)
Carrying value as of December 31, 2020$9,000 $111,316 $120,316 
Amortization— (11,165)(11,165)
Carrying value as of December 31, 2021$9,000 $100,151 $109,151 
The airline certificates have an indefinite life and therefore are not amortized. The Company amortizes finite-lived intangible assets, including customer relationship and STC intangibles, over 5 to 18 remaining years. The Company recorded intangible amortization expense of $11.2 million, $11.4 million and $11.4 million for the years ending December 31, 2021, 2020 and 2019, respectively. Estimated amortization expense for the next five years is $12.5 million, $10.2 million, $10.2 million, $9.4 million and $4.5 million.
Stock warrants issued to a lessee (see Note C) as an incentive are recorded as a lease incentive asset using their fair value at the time that the lessee has met its performance obligations and amortized against revenues over the duration of related aircraft leases. The Company's lease incentive granted to the lessee was as follows (in thousands):
Lease
Incentive
Carrying value as of December 31, 2019$146,678 
Amortization(20,671)
Carrying value as of December 31, 2020$126,007 
Amortization(23,094)
Carrying value as of December 31, 2021$102,913 
The lease incentive began to amortize in April 2016 with the commencement of certain aircraft leases. As of December 31, 2021, based on the warrants granted to date, the Company expects to record amortization, as a reduction to the lease revenue, of $23.3 million, $18.7 million, $15.7 million, $15.8 million and $12.8 million for each of the next five years ending December 31, 2026.
In January 2014, the Company acquired a 25 percent equity interest in West Atlantic AB of Gothenburg, Sweden ("West"). West, through its two airlines, West Atlantic UK and West Atlantic Sweden, operates a fleet of aircraft on behalf of European regional mail carriers and express logistics providers. In April 2019, West issued additional shares to a new investor in conjunction with a capital investment and purchase agreement which reduced the Company's ownership to approximately 10% and reduced the Company's influence over West. In 2020, the Company sold its remaining interest to the same investor.
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On August 3, 2017 the Company entered into a joint-venture agreement with Precision Aircraft Solutions, LLC, to develop a passenger-to-freighter conversion program for Airbus A321-200 aircraft. The Company anticipates approval of a supplemental type certificate from the FAA in 2021. The Company expects to make contributions equal to its 49% ownership percentage of the program's total costs over the next two years. During the 2021, 2020 and 2019 years, the Company contributed $2.5 million, $13.3 million and $12.3 million to the joint venture, respectively. The Company accounts for its investment in the aircraft conversion joint venture under the equity method of accounting, in which the carrying value of each investment is reduced for the Company's share of the non-consolidated affiliates operating results.
The carrying value of West and the joint venture totaled $10.3 million and $10.7 million at December 31, 2021 and 2020, respectively, and are reflected in “Other Assets” in the Company’s consolidated balance sheets. The Company monitors its investments in affiliates for indicators of other-than-temporary declines in value on an ongoing basis in accordance with GAAP. If the Company determines that an other-than-temporary decline in value has occurred, it recognizes an impairment loss, which is measured as the difference between the recorded carrying value and the fair value of the investment. The fair value is generally determined using an income approach based on discounted cash flows or using negotiated transaction values.

NOTE C—SIGNIFICANT CUSTOMERS
Three customers each account for a significant portion of the Company's consolidated revenues. The percentage of the Company's revenues for the Company's three largest customers, for the years ended December 31, 2021, 2020 and 2019 are as follows:
Year Ended December 31,
202120202019
CustomerPercentage of Revenue
U.S. Department of Defense ("DoD")26%31%34%
Amazon 35%30%23%
DHL 12%12%14%
The accounts receivable from the Company's three largest customers as of December 31, 2021 and 2020 are as follows (in thousands):
Year Ending December 31,
20212020
CustomerAccounts Receivable
DoD$57,998 $32,625 
Amazon68,429 55,997 
DHL9,111 10,471 
DoD
The Company is a provider of cargo and passenger airlift services to the DoD. The DoD awards flights to U.S. certificated airlines through annual contracts and through temporary "expansion" routes.
DHL
The Company has had long-term contracts with DHL Network Operations (USA), Inc. and its affiliates ("DHL") since August 2003. The Company leases Boeing 767 aircraft to DHL under both long-term and short-term lease agreements. Under a separate crew, maintenance and insurance (“CMI”) agreement, the Company operates Boeing 767 aircraft that DHL leases from the Company. Pricing for services provided through the CMI agreement is based on pre-defined fees, scaled for the number of aircraft operated and the number of flight crews provided to DHL for its U.S. network. The Company provides DHL with scheduled maintenance services for aircraft that DHL
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leases. The Company also provides additional air cargo transportation services for DHL through ACMI agreements in which the Company provides the aircraft, crews, maintenance and insurance under a single contract. As of December 31, 2021, the Company leased 12 Boeing 767 freighter aircraft to DHL comprised of four Boeing 767-200 aircraft and eight Boeing 767-300 aircraft, with expirations between 2022 and 2028. In February 2022, the Company and DHL agreed to a six-year extension of its dry leases for five Boeing 767 freighters as well as an extension of the CMI agreements to operate aircraft through April 2028.
Amazon
The Company has been providing freighter aircraft, airline operations and services for cargo handling and logistical support for Amazon.com Services, LLC ("ASI"), successor to Amazon.com Services, Inc., a subsidiary of Amazon.com, Inc. ("Amazon") since September 2015. On March 8, 2016, the Company entered into an Air Transportation Services Agreement (the “ATSA”) with ASI, pursuant to which CAM leases Boeing 767 freighter aircraft to ASI. The ATSA also provides for the operation of aircraft by the Company’s airline subsidiaries, and the management of ground services by the Company's subsidiary LGSTX Services, Inc. ("LGSTX"). As of December 31, 2021, the Company leased 42 Boeing 767 freighter aircraft to ASI with lease expirations between 2023 and 2031.
Amazon Investment Agreement
In conjunction with the execution of the ATSA, the Company and Amazon entered into an Investment Agreement and a Stockholders Agreement on March 8, 2016. The Investment Agreement called for the Company to issue warrants in three tranches granting Amazon the right to acquire up to 19.9% of the Company’s outstanding common shares as described below. The first tranche of warrants, issued upon the execution of the Investment Agreement and all of which are now fully vested, granted Amazon the right to purchase approximately 12.81 million ATSG common shares, with the first 7.69 million common shares vesting upon issuance on March 8, 2016, and the remaining 5.12 million common shares vesting as the Company delivered additional aircraft leased under the ATSA. The second tranche of warrants, which were issued and vested on March 8, 2018, granted Amazon the right to purchase approximately 1.59 million ATSG common shares. The third tranche of warrants vested on September 8, 2020, and granted Amazon the right to purchase an additional 0.5 million ATSG common shares to bring Amazon’s ownership, after the exercise in full of the three tranches of warrants, to 19.9% of the Company’s pre-transaction outstanding common shares measured on a GAAP-diluted basis, adjusted for share issuances and repurchases by the Company following the date of the 2016 Investment Agreement and after giving effect to the warrants granted. The exercise price of the 14.9 million warrants issued under the 2016 Investment Agreement was $9.73 per share, which represents the closing price of ATSG’s common shares on February 9, 2016. Each of the three tranches of warrants were exercisable in accordance with their terms through March 8, 2021 (subject to extension if regulatory approvals, exemptions, authorizations, consents or clearances have not been obtained by such date).
On March 5, 2021, Amazon exercised warrants from the 2016 Investment Agreement for 865,548 shares of the Company's common stock through a cashless exercise by forfeiting 480,047 warrants from the 2016 Investment Agreement as payment. For the cashless exchange, ATSG shares were valued at $27.27 per share, its volume-weighted average price for the previous 30 trading days immediately preceding March 5, 2021. Also on March 5, 2021, Amazon notified the Company of its intent to exercise warrants from the 2016 Investment agreement for 13,562,897 shares of the Company's common stock by paying $132.0 million of cash to the Company. This exercise was contingent upon the approval of the United States Department of Transportation, and the expiration or termination of any applicable waiting period pursuant to the Hart-Scott-Rodino Antitrust Improvements Act of 1976. After receiving all required regulatory approvals and clearances, Amazon remitted the funds to the Company on May 7, 2021, and the Company issued the corresponding shares of common stock, completing the warrant exercise.
On December 22, 2018, the Company announced agreements with Amazon to 1) lease and operate ten additional Boeing 767-300 aircraft for ASI, 2) extend the term of the 12 Boeing 767-200 aircraft currently leased to ASI by two years to 2023 with an option for three more years, 3) extend the term of the eight Boeing 767-300 aircraft currently leased to ASI by three years to 2026 and 2027 with an option for three more years, and 4) extend the ATSA by five years through March 2026, with an option to extend for an additional three years. The Company leased all ten of the 767-300 aircraft in 2020. In conjunction with the commitment for ten additional 767 aircraft leases, extensions of twenty existing Boeing 767 aircraft leases and the ATSA described above, Amazon and the Company entered into another Investment Agreement on December 20, 2018. Pursuant to the 2018 Investment
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Agreement, Amazon was issued warrants for 14.8 million common shares. This group of warrants will expire if not exercised within seven years from their issuance date, in December of 2025 (subject to extension if regulatory approvals, exemptions, authorizations, consents or clearances have not been obtained by such date). The warrants have an exercise price of $21.53 per share.
On May 29, 2020, ASI agreed to lease twelve more Boeing 767-300 aircraft from the Company. The first of these leases began in the second quarter of 2020 with the remaining eleven delivered in 2021. All twelve of these aircraft leases were for ten-year terms. Pursuant to the 2018 Investment Agreement, as a result of leasing 12 aircraft, Amazon was issued warrants for 7.0 million common shares, all of which have vested. These warrants will expire if not exercised by December 20, 2025 (subject to extension if regulatory approvals, exemptions, authorizations, consents or clearances have not been obtained by such date). The exercise price of these warrants is $20.40 per share.
Issued and outstanding warrants are summarized below as of December 31, 2021:
Common Shares in millions
Exercise priceVestedNon-VestedExpiration
2018 Investment Agreement$21.5314.80.0December 20, 2025
2018 Investment Agreement$20.407.00.0December 20, 2025
Additionally, Amazon can earn incremental warrants rights up to 2.9 million common shares under the 2018 Investment Agreement by leasing up to five more cargo aircraft from the Company before January 2026. Incremental warrants granted for ASI’s commitment to any such future aircraft leases will have an exercise price based on the volume-weighted average price of the Company's shares during the 30 trading days immediately preceding the contractual commitment for each lease.
For all outstanding warrants vested, Amazon may select a cashless conversion option. Assuming ATSG's stock price at the time of conversion is above the warrant exercise price, Amazon would receive fewer shares in exchange for any warrants exercised under the cashless option by surrendering the number of shares with a market value equal to the exercise price.
The Company’s accounting for the warrants has been determined in accordance with the financial reporting guidance for financial instruments. Warrants classified as liabilities are marked to fair value at the end of each reporting period. The value of warrants is recorded as a customer incentive asset if it is probable of vesting at the time of grant and further changes in the fair value of warrant obligations are recorded to earnings. Upon a warrant vesting event, the customer incentive asset is amortized as a reduction of revenue over the duration of the related revenue contract.
In accordance with the 2016 Investment Agreement, on September 8, 2020, the final number of shares issuable under the third tranche of warrants was determined to be 0.5 million common shares. As a result, under U.S. GAAP, the value of the entire warrant grant under the 2016 Investment Agreement was remeasured on September 8, 2020, and their fair value of $221 million was reclassified from balance sheet liabilities to paid-in-capital. In October 2020, upon the execution of the 10th and final aircraft lease of the December 2018 commitment, warrants for 14.8 million shares were remeasured on October 1, 2020, and their fair value of $154 million was reclassified from balance sheet liabilities to paid-in-capital. In December 2021, upon execution of the 12th and final aircraft lease of the May 2020 commitment, warrants for 7.0 million shares were remeasured on December 7, 2021, and their fair value of $82.4 million was reclassified from balance sheet liabilities to paid-in-capital.
As of December 31, 2021, the Company's liabilities reflected warrants from the 2018 Amazon agreements having a fair value of $0.9 million. As of December 31, 2020, the Company's liabilities reflected warrants from the 2018 Amazon agreements having a fair value of $103.5 million. During the years ended December 31, 2021, 2020 and 2019, the re-measurements of warrants to fair value resulted in net non-operating gains of $20.2 million and losses of $95.5 million and $2.3 million before the effect of income taxes, respectively.
The Company's earnings in future periods will be impacted by the re-measurements of warrant fair value, amortizations of the lease incentive asset and the related income tax effects. For income tax calculations, the value and timing of related tax deductions will differ from the guidance described above for financial reporting.

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NOTE D—FAIR VALUE MEASUREMENTS
The Company’s money market funds and interest rate swaps are reported on the Company’s consolidated balance sheets at fair values based on market values from comparable transactions. The fair value of the Company’s money market funds, convertible note, convertible note hedges and interest rate swaps are based on observable inputs (Level 2) from comparable market transactions.
The fair value of the stock warrant obligations resulting from aircraft leased to ASI were determined using a Black-Scholes pricing model which considers various assumptions, including the Company’s common stock price, the volatility of the Company’s common stock, the expected dividend yield, exercise price and the risk-free interest rate (Level 2 inputs). The fair value of the stock warrant obligations for unvested stock warrants, conditionally granted to Amazon for the execution of incremental, future aircraft leases, include additional assumptions including the expected exercise prices and the probabilities that future leases will occur (Level 3 inputs).
The following table reflects assets and liabilities that are measured at fair value on a recurring basis (in thousands):
As of December 31, 2021Fair Value Measurement UsingTotal
 Level 1Level 2Level 3
Assets
Cash equivalents—money market$— $30,042 $— $30,042 
Total Assets$— $30,042 $— $30,042 
Liabilities
Interest rate swap$— $(3,603)$— $(3,603)
Stock warrant obligations— — (915)(915)
Total Liabilities$— $(3,603)$(915)$(4,518)

As of December 31, 2020Fair Value Measurement UsingTotal
 Level 1Level 2Level 3
Assets
Cash equivalents—money market$— $20,389 $— $20,389 
Interest rate swap— — — — 
Total Assets$— $20,389 $— $20,389 
Liabilities
Interest rate swap$— $(13,414)$— $(13,414)
Stock warrant obligations— (9,058)(94,416)(103,474)
Total Liabilities$— $(22,472)$(94,416)$(116,888)
At December 31, 2020, vested stock warrants from the 2018 Amazon agreements having an exercise price of $20.40 were valued at $15.49 each, using a risk-free interest rate of 0.4% and a stock volatility of 40.0%, based on the time period corresponding with the expiration period of the warrants. At December 31, 2021 and 2020, unvested stock warrants from the 2018 Amazon agreement were valued using additional assumptions for an expected grant date, expected exercise price, the risk free rate to the expected grant date and the probabilities that future leases will occur.
As a result of lower market interest rates compared to the stated interest rates of the Company’s fixed rate debt obligations, the fair value of the Company’s debt obligations, based on Level 2 observable inputs, was approximately $37.1 million more than the carrying value, which was $1,299.4 million at December 31, 2021. As of December 31, 2020, the fair value of the Company’s debt obligations was approximately $70.8 million less than the carrying value, which was $1,479.1 million. The non-financial assets, including goodwill, intangible assets and property and equipment are measured at fair value on a non-recurring basis.

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NOTE E—PROPERTY AND EQUIPMENT
The Company's property and equipment consists primarily of cargo aircraft, aircraft engines and other flight equipment. Property and equipment, to be held and used, is summarized as follows (in thousands):
 
 December 31,
2021
December 31,
2020
Flight equipment$3,301,113 $2,856,142 
Ground equipment64,641 65,857 
Leasehold improvements, facilities and office equipment38,769 36,193 
Aircraft modifications and projects in progress206,917 231,451 
3,611,440 3,189,643 
Accumulated depreciation(1,481,506)(1,249,867)
Property and equipment, net$2,129,934 $1,939,776 
CAM owned aircraft with a carrying value of $1,404.4 million and $1,097.6 million that were under lease to external customers as of December 31, 2021 and 2020, respectively.
During the second quarter of 2020, the Company decided to retire its four Boeing 757 freighter aircraft as a result of customer preferences for other aircraft types. Three of the Boeing 757 freighter airframes have been removed from service and are available for sale. One remained in service through January 2021. The Pratt and Whitney engines that power these aircraft remain in use for lease to external customers. Separating the Boeing 757 freighters and engines while marketing the airframes, triggered a fair value assessment. As a result, an impairment charge totaling $39.1 million was recorded primarily to reflect the market value of these assets as well as other surplus engines and parts. Fair values were determined using Level 3 inputs based primarily on independent appraisals and recent market transactions as well as the Company’s assessment of existing market conditions based on industry knowledge.

NOTE F—DEBT OBLIGATIONS
Debt obligations consisted of the following (in thousands):
 December 31,December 31,
 20212020
Unsubordinated term loans$— $612,169 
Revolving credit facility360,000 140,000 
Senior notes697,162 493,376 
Convertible notes231,646 222,391 
Other financing arrangements10,555 11,141 
Total debt obligations1,299,363 1,479,077 
Less: current portion(628)(13,746)
Total long term obligations, net$1,298,735 $1,465,331 
The Company utilizes a syndicated credit agreement ("Senior Credit Agreement") which includes the ability to execute term loans and a revolving credit facility. Prior to its amendment on April 6, 2021, the Senior Credit Agreement had a maturity date of November 2024 provided certain liquidity measures are maintained during 2024, an incremental accordion capacity based on debt ratios and a maximum revolver capacity of $600.0 million. The interest rate is a pricing premium added to LIBOR based upon the Company's debt to its earnings before interest, taxes, depreciation and amortization expenses ("EBITDA") as defined under the Senior Credit Agreement.
On April 6, 2021, the Company amended the Senior Credit Agreement ("Amended Credit Agreement"). The Amended Credit Agreement: (i) temporarily increased the aggregate amount of the revolving credit facility from $600.0 million to $1 billion, and subsequently decreased the aggregate amount to $800.0 million on April 13, 2021,
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(ii) permitted increases of the revolving credit facility commitments and/or new tranches of term loans in an aggregate principal amount equal to the sum of $400 million plus the principal amount of indebtedness that could be incurred at the time of the increase that would not cause the Secured Leverage Ratio (as defined in the Amended Credit Agreement) to exceed 3.25 to 1.00 on a pro forma basis, (iii) modified the maturity date of the agreement from November 30, 2024, to April 6, 2026, with such extension of the maturity date being subject to (1) at the election of the Lenders, five one-year extensions and (2) an earlier springing maturity date of July 12, 2024, if, on such date, (a) more than $75,000,000 in aggregate principal amount of the Company's 1.125% senior convertible notes due 2024 remain outstanding and (b) the Company has less than $375,000,000 of liquidity at such time, (iv) removed the Collateral to Total Exposure Ratio (as defined in the agreements) as a financial covenant, and (v) prepaid the entire outstanding balance of all term loans at the time of the amendment.
On January 28, 2020, the Company, through a subsidiary, completed a debt offering of $500.0 million in senior unsecured notes (the “Senior Notes”). The Senior Notes were sold only to qualified institutional buyers in the United States pursuant to Rule 144A under the Securities Act of 1933, as amended (the “1933 Act”), and certain investors pursuant to Regulation S under the Securities Act. The Senior Notes are senior unsecured obligations that bear interest at a fixed rate of 4.75% per year, payable semiannually in arrears on February 1 and August 1 of each year, beginning on August 1, 2020. The Senior Notes will mature on February 1, 2028. The Senior Notes contain customary events of default and certain covenants which are generally no more restrictive than those set forth in the Senior Credit Agreement. The net proceeds of $495.0 million from the Senior Notes were used to pay down the revolving credit facility. The Senior Notes do not require principal payments until maturity but prepayments are allowed without penalty beginning February 1, 2025.
As of December 31, 2021, the unused revolving credit facility available to the Company at the trailing twelve-month EBITDA level was $424.7 million, and additional permitted indebtedness under the Senior Credit Agreement subject to compliance with other covenants, was limited to $250.0 million.
On April 13, 2021, the Company, through a subsidiary, completed its offering of $200.0 million of additional notes ("Additional Notes") under the existing Senior Notes. The Additional Notes are fully fungible with the Senior Notes, treated as a single class for all purposes under the indenture governing the existing notes with the same terms as those of the existing notes (other than issue date and issue price). The proceeds of $205.5 million, net of scheduled interest payable, were used, in conjunction with draws from the revolving credit facility to repay the unsubordinated term loans. Upon retirement of the unsubordinated term loans, the company expensed debt issuance costs of $6.5 million related to the unsubordinated term loans.
The balance of the Senior Notes is net of debt issuance costs of $7.8 million and $6.6 million as of December 31, 2021 and 2020, respectively. The balance of the unsubordinated term loans was net of debt issuance costs of $7.0 million as of December 31, 2020. Under the terms of the Senior Credit Agreement, interest rates are adjusted at least quarterly based on the Company's EBITDA, its outstanding debt level and prevailing LIBOR or prime rates. At the Company's debt-to-EBITDA ratio as December 31, 2021, the LIBOR based financing for the revolving credit facility bear variable interest rates of 1.11%, respectively.
The Senior Credit Agreement is collateralized by certain of the Company's Boeing 777, 767 and 757 aircraft. Under the terms of the Senior Credit Agreement, the Company is required to maintain certain collateral coverage ratios set forth in the Senior Credit Agreement. The Senior Credit agreement limits the amount of dividends the Company can pay and the amount of common stock it can repurchase to $100.0 million during any calendar year, provided the Company's total debt to EBITDA ratio is under 3.50 times and the secured debt to EBITDA ratio is under 3.0 times, after giving effect to the dividend or repurchase. The Senior Credit Agreement contains covenants, including a maximum permitted total EBITDA to debt ratio, a fixed charge covenant ratio requirement, limitations on certain additional indebtedness, and on guarantees of indebtedness. The Senior Credit Agreement stipulates events of default, including unspecified events that may have material adverse effects on the Company. If an event of default occurs, the Company may be forced to repay, renegotiate or replace the Senior Credit Agreement.
In September 2017, the Company issued $258.8 million aggregate principal amount of 1.125% Convertible Senior Notes due 2024 ("Convertible Notes") in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities Act. The Convertible Notes bear interest at a rate of 1.125% per year payable semi-annually in arrears on April 15 and October 15 each year, beginning April 15, 2018. The Convertible Notes mature on October 15, 2024, unless repurchased or converted in accordance with their terms prior to such date. The Convertible Notes are unsecured indebtedness, subordinated to the Company's existing and future secured indebtedness and other liabilities, including trade payables. Conversion of the Convertible Notes can only occur
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upon satisfaction of certain conditions and during certain periods, beginning any calendar quarter commencing after December 31, 2017 and thereafter, until the close of business on the second scheduled trading day immediately preceding the maturity date. Upon the occurrence of certain fundamental changes, holders of the Convertible Notes can require the Company to repurchase their notes at the cash repurchase price equal to the principal amount of the notes, plus any accrued and unpaid interest.
The Convertible Notes may be settled in cash, the Company’s common shares or a combination of cash and the Company’s common shares, at the Company’s election. The initial conversion rate is 31.3475 common shares per $1,000 principal amount of Convertible Notes (equivalent to an initial conversion price of approximately $31.90 per common share). If a “make-whole fundamental change” (as defined in the offering circular with the Convertible Notes) occurs, the Company will, in certain circumstances, increase the conversion rate for a specified period of time.
In conjunction with the Convertible Notes, the Company purchased convertible note hedges under privately negotiated transactions for $56.1 million, having the same number of the Company's common shares, 8.1 million shares and same strike price of $31.90, that underlie the Convertible Notes. The convertible note hedges are expected to reduce the potential equity dilution with respect to the Company's common stock, and/or offset any cash payments in excess of the principal amount due, as the case may be, upon conversion of the Convertible Notes. The Company's current intent and policy is to settle all Note conversions through a combination settlement which satisfies the principal amount of the Convertible Notes outstanding with cash.
The conversion feature of the Convertible Notes required bifurcation from the principal amount under the applicable accounting guidance. Settlement provisions of the Convertible Notes and the convertible note hedges required cash settlement of these instruments until the Company's shareholders increased the number of authorized shares of common stock to cover the full number of shares underlying the Convertible Notes. As a result, the conversion feature of the Convertible Notes and the convertible note hedges were initially accounted for as liabilities and assets, respectively, and marked to market at the end of each period. The fair value of the note conversion obligation at issuance was $57.4 million.
On May 10, 2018, the Company's shareholders increased the number of authorized shares of common stock to cover the full number of shares underlying the Convertible Notes. The Company reevaluated the Convertible Notes and convertible note hedges under the applicable accounting guidance including ASC 815, "Derivatives and Hedging," and determined that the instruments, which meet the definition of derivative and are indexed to the Company's own stock, should be classified in shareholder's equity. On May 10, 2018, the fair value of the conversion feature of the Convertible Notes and the convertible note hedges of $51.3 million and $50.6 million, respectively, were reclassified to paid-in capital and are no longer remeasured to fair value.
The net proceeds from the issuance of the Convertible Notes was approximately $252.3 million, after deducting initial issuance costs. These unamortized issuance costs and discount are being amortized to interest expense through October 2024, using an effective interest rate of approximately 5.15%. The carrying value of the Company's convertible debt is shown below.
December 31,December 31,
20212020
Principal value, Convertible Senior Notes, due 2024258,750 258,750 
Unamortized issuance costs(2,889)(3,894)
Unamortized discount(24,215)(32,465)
Convertible debt231,646 222,391 
In conjunction with the offering of the Convertible Notes, the Company also sold warrants to the convertible note hedge counterparties in separate, privately negotiated warrant transactions at a higher strike price and for the same number of the Company’s common shares, subject to customary anti-dilution adjustments. The amount received for these warrants and recorded in Stockholders' Equity in the Company’s consolidated balance sheets was $38.5 million. These warrants could result in 8.1 million additional shares of the Company's common stock, if the Company's traded market price exceeds the strike price which is $41.35 per share and is subject to certain adjustments under the terms of the warrant transactions. The warrants could have a dilutive effect on the
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computation of earnings per share to the extent that the average traded market price of the Company's common shares for a reporting periods exceed the strike price.
The scheduled cash principal payments for the Company's debt obligations, as of December 31, 2021, for the next five years are as follows (in thousands):
Principal
Payments
2022$628 
2023639 
2024259,400 
2025661 
2026360,672 
2027 and beyond707,305 
Total principal cash payments1,329,305 
Less: unamortized issuance costs, premiums and discounts(29,942)
Total debt obligations$1,299,363 

NOTE G—DERIVATIVE INSTRUMENTS
The Company maintains derivative instruments for protection from fluctuating interest rates. The table below provides information about the Company’s interest rate swaps (in thousands):
  December 31, 2021December 31, 2020
Expiration DateStated
Interest
Rate
Notional
Amount
Market
Value
(Liability)
Notional
Amount
Market
Value
(Liability)
May 5, 20211.090 %— — 13,125 (41)
May 30, 20211.703 %— — 13,125 (80)
December 31, 20212.706 %— — 138,750 (3,551)
March 31, 20221.900 %50,000 (221)50,000 (1,116)
March 31, 20221.950 %75,000 (341)75,000 (1,722)
March 31, 20232.425 %133,125 (3,041)140,625 (6,904)
The outstanding interest rate swaps are not designated as hedges for accounting purposes. The effects of future fluctuations in LIBOR interest rates on derivatives held by the Company will result in the recording of unrealized gains and losses into the statement of operations. The Company recorded a net gain on derivatives of $9.8 million and net losses of $5.3 million and $10.0 million for the years ending December 31, 2021, 2020 and 2019, respectively. The liability for outstanding derivatives is recorded in other liabilities and in accrued expenses.

NOTE H—COMMITMENTS AND CONTINGENCIES
Payroll Support Programs
During 2020, two of the Company's airline subsidiaries, OAI and ATI, received government funds totaling $75.8 million pursuant to payroll support program agreements under the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”). In February 2021, OAI was approved for $37.4 million of additional non-repayable government funds pursuant to a payroll support program agreement under the Consolidated Appropriations Act, 2021 (the “PSP Extension Law”). This grant was subsequently increased by $5.6 million. Further, in April 2021,
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OAI was approved for $40.0 million of additional non-repayable government funds pursuant to a payroll support program agreement under the American Rescue Plan Act of 2021 (the "American Rescue Plan").
The three programs are structured in a substantially similar manner. These grants are not required to be repaid if the Company complies with the provisions of the payroll support program agreements under CARES Act, the PSP Extension Law and the American Rescue Plan. The grants are recognized over the periods in which the Company recognizes the related expenses for which the grants are intended to compensate. The Company recognizes the grants as contra-expense during the periods in which passenger flight operations and combi flight operations levels are expected to be negatively impacted by the pandemic. During the year ended December 31, 2021 and 2020, the Company recognized $111.7 million and $47.2 million of the grants, respectively. The Company recognized all of the CARES Act funds by the end of 2021.
In conjunction with the payroll support program agreements under the CARES Act, OAI and ATI agreed on behalf of themselves and ABX to refrain from conducting involuntary furloughs or reducing employee rates of pay or benefits through September 30, 2020. Thereafter, OAI agreed as a condition of receiving grants under the PSP Extension Law and the American Rescue Plan to refrain from conducting involuntary furloughs or reducing employee rates of pay or benefits through March 31, 2021, and September 30, 2021, respectively. Under the CARES Act, OAI and ATI agreed to limit, on behalf of themselves and certain affiliates, executive compensation through March 24, 2022; maintain certain air transportation service through March 1, 2022 as may be required by the U.S. Department of Transportation pursuant to its authority under the CARES Act; and maintain certain internal controls and records relating to the funds and comply with certain reporting requirements. OAI further agreed as a condition of receiving grants under the PSP Extension Law and thereafter the American Rescue Plan, to limit executive compensation through October 1, 2022 and April 1, 2023, respectively. In addition, the Company may not pay dividends or repurchase its shares through September 30, 2022.
Lease Commitments
The Company leases property, aircraft, aircraft engines and other types of equipment under operating leases. The Company's airlines operate six freighter aircraft provided by customers and four passenger aircraft leased from external companies. Property leases include hangars, warehouses, offices and other space at certain airports with fixed rent payments and lease terms ranging from one month to six years. The Company is obligated to pay the lessor for maintenance, real estate taxes, insurance and other operating expenses on certain property leases. These expenses are variable and are not included in the measurement of the lease asset or lease liability. These expenses are recognized as variable lease expense when incurred and are not material. Equipment leases include ground support and industrial equipment as well as computer hardware with fixed rent payments and terms of one month to five years.
The Company records the initial right-to-use asset and lease liability at the present value of lease payments scheduled during the lease term. For the years ended December 31, 2021 and 2020, non-cash transactions to recognize right-to-use assets and corresponding liabilities for new leases were $14.7 million and $46.5 million, respectively. Unless the rate implicit in the lease is readily determinable, the Company discounts the lease payments using an estimated incremental borrowing rate at the time of lease commencement. The Company estimates the incremental borrowing rate based on the information available at the lease commencement date, including the rate the Company could borrow for a similar amount, over a similar lease term with similar collateral. The Company's weighted-average discount rate for operating leases at December 31, 2021 and 2020 was 2.4% and 2.9%, respectively. Leases often include rental escalation clauses, renewal options and/or termination options that are factored into the determination of lease payments when appropriate. Although not material, the amount of such options is reflected below in the maturity of operating lease liabilities table. Lease expense is recognized on a straight-line basis over the lease term. Our weighted-average remaining lease term is 3.8 years and 4.5 years as of December 31, 2021 and 2020, respectively.

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For the year ended December 31, 2021 and 2020, cash payments against operating lease liabilities were $20.5 million and $17.3 million, respectively. As of December 31, 2021, the maturities of operating lease liabilities are as follows (in thousands):
Operating Leases
2022$20,024 
202317,382 
202413,880 
202510,126 
20264,478 
2027 and beyond42 
Total undiscounted cash payments65,932 
Less: amount representing interest(2,762)
Present value of future minimum lease payments63,170 
Less: current obligations under leases18,783 
Long-term lease obligation$44,387 

Purchase Commitments
The Company has agreements with vendors for the conversion of Boeing 767-300, Airbus A321 and Airbus A330 passenger aircraft into a standard configured freighter aircraft. The conversions primarily consist of the installation of a standard cargo door and loading system. As of December 31, 2021, the Company owned twelve Boeing 767-300 aircraft and one Airbus A321-200 aircraft that were in or awaiting the modification process. As of December 31, 2021, the Company has agreements to purchase eleven more Boeing 767-300 passenger aircraft and two Airbus A321-200 passenger aircraft through 2024. As of December 31, 2021, the Company's commitments to acquire and convert aircraft totaled $391.8 million.
Guarantees and Indemnifications
Certain leases and agreements of the Company contain guarantees and indemnification obligations to the lessor, or one or more other parties that are considered reasonable and customary (e.g. use, tax and environmental indemnifications), the terms of which range in duration and are often limited. Such indemnification obligations may continue after expiration of the respective lease or agreement.
Other
In addition to the foregoing matters, the Company is also a party to legal proceedings in various federal and state jurisdictions from time to time arising out of the operation of the Company's business. The amount of alleged liability, if any, from these proceedings cannot be determined with certainty; however, the Company believes that its ultimate liability, if any, arising from pending legal proceedings, as well as from asserted legal claims and known potential legal claims which are probable of assertion, taking into account established accruals for estimated liabilities, should not be material to our financial condition or results of operations.

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Employees Under Collective Bargaining Agreements
As of December 31, 2021, the flight crewmember employees of ABX, ATI and Omni and flight attendant employees of ATI and Omni were represented by the labor unions listed below:
AirlineLabor Agreement UnitPercentage of
the Company’s
Employees
ABXInternational Brotherhood of Teamsters5.2%
ATIAir Line Pilots Association9.3%
OAIInternational Brotherhood of Teamsters6.1%
ATIAssociation of Flight Attendants0.6%
OAIAssociation of Flight Attendants6.2%

NOTE I—PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS
Defined Benefit and Post-retirement Healthcare Plans
ABX sponsors a qualified defined benefit pension plan for ABX crewmembers and a qualified defined benefit pension plan for a major portion of its other ABX employees that meet minimum eligibility requirements. ABX also sponsors non-qualified defined benefit pension plans for certain employees. These non-qualified plans are unfunded. Employees are no longer accruing benefits under any of the defined benefit pension plans. ABX also sponsors a post-retirement healthcare plan for its ABX crewmembers, which is unfunded. Benefits for covered individuals terminate upon reaching age 65 under the post-retirement healthcare plans.
The accounting and valuation for these post-retirement obligations are determined by prescribed accounting and actuarial methods that consider a number of assumptions and estimates. The selection of appropriate assumptions and estimates is significant due to the long time period over which benefits will be accrued and paid. The long term nature of these benefit payouts increases the sensitivity of certain estimates of our post-retirement obligations. The assumptions considered most sensitive in actuarially valuing ABX’s pension obligations and determining related expense amounts are discount rates and expected long term investment returns on plan assets. Additionally, other assumptions concerning retirement ages, mortality and employee turnover also affect the valuations. Actual results and future changes in these assumptions could result in future costs significantly higher than those recorded in our results of operations.
ABX measures plan assets and benefit obligations as of December 31 of each year. Information regarding ABX’s sponsored defined benefit pension plans and post-retirement healthcare plans follow below. The accumulated benefit obligation reflects pension benefit obligations based on the actual earnings and service to-date of current employees.

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Funded Status  (in thousands):
 Pension PlansPost-retirement
Healthcare Plans
 2021202020212020
Accumulated benefit obligation$839,267 $873,826 $3,142 $3,484 
Change in benefit obligation
Obligation as of January 1$873,826 $779,031 $3,484 $3,707 
Service cost— — 95 139 
Interest cost22,387 27,880 42 91 
Plan transfers3,125 2,895 — — 
Benefits paid(36,109)(34,218)(250)(362)
Curtailments and settlement— (2,435)— (17)
Actuarial (gain) loss(23,962)100,673 (229)(74)
Obligation as of December 31$839,267 $873,826 $3,142 $3,484 
Change in plan assets
Fair value as of January 1$843,895 $746,763 $— $— 
Actual gain (loss) on plan assets37,626 120,057 — — 
Plan transfers3,125 2,895 — — 
Employer contributions1,658 10,833 250 362 
Benefits paid(36,109)(34,218)(250)(362)
Settlement payments$— $(2,435)$— $— 
Fair value as of December 31$850,195 $843,895 $— $— 
Funded status
Overfunded plans, net asset$30,867 $3,447 $— $— 
Underfunded plans
Current liabilities$(1,345)$(1,348)$(399)$(415)
Non-current liabilities$(18,594)$(32,030)$(2,743)$(3,069)

Components of Net Periodic Benefit Cost
ABX’s net periodic benefit costs for its defined benefit pension plans and post-retirement healthcare plans for the years ended December 31, 2021, 2020 and 2019, are as follows (in thousands):
 Pension PlansPost-Retirement Healthcare Plan
 202120202019202120202019
Service cost$— $— $— $95 $139 107 
Interest cost22,387 27,880 31,299 42 91 148 
Expected return on plan assets(47,502)(44,673)(37,907)— — — 
Curtailments and settlements— (424)— — (17)— 
Amortization of prior service cost— — — — — — 
Amortization of net (gain) loss7,058 3,763 15,528 186 124 172 
Net periodic benefit cost (income)$(18,057)$(13,454)$8,920 $323 $337 $427 


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Unrecognized Net Periodic Benefit Expense
The pre-tax amounts in accumulated other comprehensive loss that have not yet been recognized as components of net periodic benefit expense at December 31 are as follows (in thousands):
 Pension PlansPost-Retirement
Healthcare Plans
 2021202020212020
Unrecognized prior service cost$— $— $— $— 
Unrecognized net actuarial loss90,675 111,820 418 833 
Accumulated other comprehensive loss$90,675 $111,820 $418 $833 
The amounts of unrecognized net actuarial loss recorded in accumulated other comprehensive loss that is expected to be recognized as components of net periodic benefit expense during 2022 is $1.3 million and less than $0.1 million for the pension plans and the post-retirement healthcare plans, respectively.
Assumptions
Assumptions used in determining the funded status of ABX’s pension plans at December 31 were as follows:
 
 Pension Plans
 202120202019
Discount rate - crewmembers2.90%2.55%3.65%
Discount rate - non-crewmembers3.00%2.75%3.70%
Expected return on plan assets5.65%5.75%6.10%
Net periodic benefit cost was based on the discount rate assumptions at the end of the previous year.
The discount rate used to determine post-retirement healthcare obligations was 2.00%, 1.30% and 4.10% for pilots at December 31, 2021, 2020 and 2019, respectively. Post-retirement healthcare plan obligations have not been funded. The Company's retiree healthcare contributions have been fixed for each participant, accordingly, healthcare cost trend rates do not affect the post-retirement healthcare obligations.

Plan Assets
The weighted-average asset allocations by asset category are as shown below:
 
 Composition of Plan Assets
as of December 31
Asset category20212020
Cash%%
Equity securities28 %30 %
Fixed income securities69 %69 %
100 %100 %
ABX uses an investment management firm to advise it in developing and executing an investment policy. The portfolio is managed with consideration for diversification, quality and marketability. The investment policy permits the following ranges of asset allocation: equities – 15% to 35%; fixed income securities – 60% to 80%; cash – 0% to 10%. Except for U.S. Treasuries, no more than 10% of the fixed income portfolio and no more than 5% of the equity portfolio can be invested in securities of any single issuer.
The overall expected long term rate of return was developed using various market assumptions in conjunction with the plans’ targeted asset allocation. The assumptions were based on historical market returns.

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Cash Flows
In 2021 and 2020, the Company made contributions to its defined benefit plans of $1.7 million and $10.8 million, respectively. The Company estimates that its contributions in 2022 will be approximately $1.3 million for its defined benefit pension plans and $0.4 million for its post-retirement healthcare plans.
The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid out of the respective plans as follows (in thousands):
 Pension
Benefits
Post-retirement
Healthcare
Benefits
2022$40,186 $399 
202343,474 481 
202445,838 489 
202547,906 483 
202648,747 425 
Years 2027 to 2031246,110 1,134 
Fair Value Measurements
The pension plan assets are stated at fair value. The following is a description of the valuation methodologies used for the investments measured at fair value, including the general classification of such instruments pursuant to the valuation hierarchy.
Common Trust Funds—Common trust funds are composed of shares or units in non-publicly traded funds whereby the underlying assets in these funds (cash, cash equivalents, fixed income securities and equity securities) are publicly traded on exchanges and price quotes for the assets held by these funds are readily available. Holdings of common trust funds are classified as Level 2 investments.
Corporate Stock—This investment category consists of common and preferred stock issued by domestic and international corporations that are regularly traded on exchanges and price quotes for these shares are readily available. These investments are classified as Level 1 investments.
Mutual Funds—Investments in this category include shares in registered mutual funds, unit trust and commingled funds. These funds consist of domestic equity, international equity and fixed income strategies. Investments in this category that are publicly traded on an exchange and have a share price published at the close of each business day are classified as Level 1 investments and holdings in the other mutual funds are classified as Level 2 investments.
Fixed Income Investments—Securities in this category consist of U.S. Government or Agency securities, state and local government securities, corporate fixed income securities or pooled fixed income securities. Securities in this category that are valued utilizing published prices at the close of each business day are classified as Level 1 investments. Those investments valued by bid data prices provided by independent pricing sources are classified as Level 2 investments.


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The pension plan assets measured at fair value on a recurring basis were as follows (in thousands):
As of December 31, 2021Fair Value Measurement UsingTotal
 Level 1Level 2
Plan assets
Common trust funds$— $29,451 $29,451 
Corporate stock— — — 
Mutual funds— 236,647 236,647 
Fixed income investments— 584,094 584,094 
Benefit Plan Assets$— $850,192 $850,192 
Investments measured at net asset value ("NAV")
Total benefit plan assets$850,195 
As of December 31, 2020Fair Value Measurement UsingTotal
 Level 1Level 2
Plan assets
Common trust funds$— $5,055 $5,055 
Corporate stock19,852 501 20,353 
Mutual funds— 237,063 237,063 
Fixed income investments545 580,476 581,021 
Benefit Plan Assets$20,397 $823,095 $843,492 
Investments measured at net asset value ("NAV")403 
Total benefit plan assets$843,895 
Investments that were measured at NAV per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. These investments include hedge funds, private equity and real estate funds. Management’s estimates are based on information provided by the fund managers or general partners of those funds.
Hedge Funds and Private Equity—These investments are not readily tradable and have valuations that are not based on readily observable data inputs. The fair value of these assets is estimated based on information provided by the fund managers or the general partners. These assets have been valued using NAV as a practical expedient.
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The following table presents investments measured at fair value based on NAV per share as a practical expedient:
 Fair ValueRedemption FrequencyRedemption Notice PeriodUnfunded Commitments
As of December 31, 2021
Hedge Funds & Private Equity$(1) (2)90 days$— 
Real Estate— (3)90 days— 
Total investments measured at NAV$$— 
As of December 31, 2020
Hedge Funds & Private Equity$403 (1) (2)90 days$— 
Real Estate— (3)90 days— 
Total investments measured at NAV$403 $— 

(1) Quarterly - hedge funds
(2) None - private equity
(3) Monthly

Defined Contribution Plans
The Company sponsors defined contribution capital accumulation plans (401k) that are funded by both voluntary employee salary deferrals and by employer contributions. Expenses for defined contribution retirement plans were $19.5 million, $15.4 million and $12.6 million for the years ended December 31, 2021, 2020 and 2019, respectively.

NOTE J—INCOME TAXES
The Company's deferred income taxes reflect the value of its net operating loss carryforwards and the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and their amounts used for income tax calculations.
At December 31, 2021, the Company had cumulative net operating loss carryforwards (“NOL CFs”) for federal income tax purposes of approximately $413.9 million, which do not expire but whose use may be limited to 80% of taxable income in any given year. The deferred tax asset balance includes $4.7 million net of a $0.3 million valuation allowance related to state NOL CFs, which have remaining lives ranging from one to twenty years. These NOL CFs are attributable to excess tax deductions related primarily to the accelerated tax depreciation of fixed assets, the timing of amortization related to Amazon warrants and cash contributions for its benefit plans. At December 31, 2021 and 2020, the Company determined that, based upon projections of taxable income, it was more likely than not that the Federal NOL CF’s will be utilized, accordingly, no allowance against these deferred tax assets was recorded. The Company had alternative minimum tax credits of $3.1 million which were recovered in 2020.
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The significant components of the deferred income tax assets and liabilities as of December 31, 2021 and 2020 are as follows (in thousands):
 December 31
 20212020
Deferred tax assets:
Net operating loss carryforward and federal credits$93,294 $71,762 
Operating lease obligation13,266 14,472 
Warrants32,075 33,940 
Post-retirement employee benefits— 7,140 
Employee benefits other than post-retirement6,919 8,545 
Inventory reserve2,714 2,288 
Deferred revenue10,918 12,608 
Other8,789 9,366 
Deferred tax assets167,975 160,121 
Deferred tax liabilities:
Accelerated depreciation(327,321)(257,765)
Post-retirement employee benefits(1,330)— 
Partnership items(6,014)(6,044)
Operating lease assets(13,029)(14,264)
Goodwill and intangible assets(14,553)(9,877)
State taxes(19,158)(11,143)
Valuation allowance against deferred tax assets(3,861)(2,293)
Deferred tax liabilities(385,266)(301,386)
Net deferred tax (liability)$(217,291)$(141,265)
The following summarizes the Company’s income tax provisions (benefits) (in thousands):
 Years Ended December 31
 202120202019
Current taxes:
Federal$— $(1,332)$1,332 
Foreign— — 
State2,402 1,235 138 
Deferred taxes:
Federal65,027 19,701 14,155 
Foreign— — — 
State4,795 (1,209)(3,677)
Change in federal statutory tax rates— — — 
Total deferred tax expense69,822 18,492 10,478 
Total income tax expense (benefit) from continuing operations$72,224 $16,314 $11,589 
Income tax expense (benefit) from discontinued operations$722 $2,081 $360 
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The reconciliation of income tax from continuing operations computed at the U.S. statutory federal income tax rates to effective income tax rates is as follows:
 Years Ended December 31
 202120202019
Statutory federal tax rate21.0 %21.0 %21.0 %
Foreign income taxes— %— %— %
State income taxes, net of federal tax benefit1.8 %5.1 %1.4 %
Tax effect of non-deductible warrant expense— %16.6 %(2.9)%
Tax effect of other non-deductible expenses0.5 %3.2 %1.7 %
Change to state statutory tax rates— %(5.4)%(5.4)%
Other0.7 %(1.1)%0.4 %
Effective income tax rate24.0 %39.4 %16.2 %
The income tax deductibility of the warrant expense is less than the expense required by GAAP because for tax purposes, the warrants are valued at a different time and under a different valuation method.
The reconciliation of income tax from discontinued operations computed at the U.S. statutory federal income tax rates to effective income tax rates is as follows:
 Years Ended December 31
 202120202019
Statutory federal tax rate21.0 %21.0 %21.0 %
State income taxes, net of federal tax benefit1.8 %1.8 %1.8 %
Change in federal statutory tax rates— %— %— %
Effective income tax rate22.8 %22.8 %22.8 %
The Company files income tax returns in the U.S. Federal jurisdiction and various international, state and local jurisdictions. The returns may be subject to audit by the Internal Revenue Service (“IRS”) and other jurisdictional authorities. International returns consist primarily of disclosure returns where the Company is covered by the sourcing rules of U.S. international treaties. The Company recognizes the impact of an uncertain income tax position in the financial statements if that position is more likely than not of being sustained on audit, based on the technical merits of the position. At December 31, 2021, 2020 and 2019, the Company's unrecognized tax benefits were $0.0 million, $0.0 million and $0.0 million respectively. Accrued interest and penalties on tax positions are recorded as a component of interest expense. Interest and penalties expense was immaterial for 2021, 2020 and 2019.
The Company began to file, effective in 2008, federal tax returns under a common parent of the consolidated group that includes ABX and all the wholly-owned subsidiaries. The returns for 2020, 2019 and 2018 related to the consolidated group remain open to examination. The consolidated federal tax returns prior to 2018 remain open to federal examination only to the extent of net operating loss carryforwards carried over from or utilized in those years. Pemco and Omni filed returns on their own behalf prior to their acquisition by the Company. State and local returns filed for 2005 through 2020 are generally also open to examination by their respective jurisdictions, either in full or limited to net operating losses. The Company files tax returns with the Republic of Ireland for its leasing operations based in Ireland.

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NOTE K—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Accumulated other comprehensive income (loss) includes the following items by components for the years ended December 31, 2021, 2020 and 2019 (in thousands):
Defined Benefit PensionDefined Benefit Post-RetirementForeign Currency TranslationTotal
Balance as of January 1, 2019(89,042)(841)(1,479)(91,362)
Other comprehensive income (loss) before reclassifications:
Actuarial gain (loss) for retiree liabilities20,793 — 20,800 
Foreign currency translation adjustment— — (18)(18)
Amounts reclassified from accumulated other comprehensive income:
Foreign currency loss— — 2,253 2,253 
Actuarial costs (reclassified to salaries, wages and benefits)15,528 172 — 15,700 
Income Tax (Expense) or Benefit(8,431)(40)(768)(9,239)
Other comprehensive income (loss), net of tax27,890 139 1,467 29,496 
Balance as of December 31, 2019(61,152)(702)(12)(61,866)
Other comprehensive income (loss) before reclassifications:
Actuarial gain (loss) for retiree liabilities(25,712)74 — (25,638)
Foreign currency translation adjustment— — (2)(2)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)3,763 124 — 3,887 
Income Tax (Expense) or Benefit5,008 (45)— 4,963 
Other comprehensive income (loss), net of tax(16,941)153 (2)(16,790)
Balance as of December 31, 2020(78,093)(549)(14)(78,656)
Other comprehensive income (loss) before reclassifications:
Actuarial gain (loss) for retiree liabilities14,087 228 14,315 
Foreign currency translation adjustment(6)(6)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)7,056 188 7,244 
Income Tax (Expense) or Benefit(4,881)(96)(4,977)
Other comprehensive income (loss), net of tax16,262 320 (6)16,576 
Balance as of December 31, 2021(61,831)(229)(20)(62,080)

NOTE L—STOCK-BASED COMPENSATION
The Company's Board of Directors has granted stock incentive awards to certain employees and board members pursuant to a long term incentive plan which was approved by the Company's stockholders in May 2005 and in May 2015. Employees have been awarded non-vested stock units with performance conditions, non-vested stock units with market conditions and non-vested restricted stock. The restrictions on the non-vested restricted stock awards lapse at the end of a specified service period, which is typically three years from the date of grant. Restrictions could lapse sooner upon a business combination, death, disability or after an employee qualifies for retirement. The non-vested stock units will be converted into a number of shares of Company stock depending on performance and market conditions at the end of a specified service period, lasting approximately three years. The performance condition awards will be converted into a number of shares of Company stock based on the Company's average
79


return on invested capital during the service period. Similarly, the market condition awards will be converted into a number of shares depending on the appreciation of the Company's stock compared to the NASDAQ Transportation Index. Board members have been granted time-based awards that vest after a period of twelve months. The Company expects to settle all of the stock unit awards by issuing new shares of stock. The table below summarizes award activity.
 Year Ended December 31
 202120202019
 Number of
Awards
Weighted
average
grant-date
fair value
Number of
Awards
Weighted
average
grant-date
fair value
Number of
Awards
Weighted
average
grant-date
fair value
Outstanding at beginning of period1,085,023 $17.14 963,832 $17.67 969,928 $15.89 
Granted273,845 26.65 437,054 18.85 302,596 23.22 
Converted(316,430)22.76 (278,163)21.34 (291,064)17.14 
Expired(58,650)24.79 (34,100)19.40 (7,900)23.78 
Forfeited(5,600)23.31 (3,600)21.62 (9,728)23.37 
Outstanding at end of period978,188 $17.49 1,085,023 $17.14 963,832 $17.67 
Vested414,949 $11.43 460,685 $13.00 476,389 $11.11 
The average grant-date fair value of each performance condition award, non-vested restricted stock award and time-based award granted by the Company was $26.69, $18.39 and $22.80 for 2021, 2020 and 2019, respectively, the fair value of the Company’s stock on the date of grant. The average grant-date fair value of each market condition award granted was $26.50, $20.41 and $24.75 for 2021, 2020 and 2019, respectively. The market condition awards were valued using a Monte Carlo simulation technique based on volatility over three years for the awards granted in 2021, 2020 and 2019 using daily stock prices and using the following variables:
202120202019
Risk-free interest rate0.3%0.7%2.5%
Volatility39.7%35.0%35.6%
For the years ended December 31, 2021, 2020 and 2019, the Company recorded expense of $7.4 million, $7.5 million and $7.0 million, respectively, for stock incentive awards. At December 31, 2021, there was $6.7 million of unrecognized expense related to the stock incentive awards that is expected to be recognized over a weighted-average period of 1.5 years. As of December 31, 2021, none of the awards were convertible, 357,499 units of the Board members' time-based awards had vested and none of the outstanding shares of the restricted stock had vested. These awards could result in a maximum number of 1,245,713 additional outstanding shares of the Company’s common stock depending on service, performance and market results through December 31, 2023.



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NOTE M—COMMON STOCK AND EARNINGS PER SHARE
Earnings per Share
The calculation of basic and diluted earnings per common share are as follows (in thousands, except per share amounts):
December 31
 202120202019
Numerator:
Earnings from continuing operations - basic$228,980 $25,079 $59,983 
Gain from stock warrants revaluation, net of tax(15,564)— (6,219)
Earnings from continuing operations - diluted$213,416 $25,079 $53,764 
Denominator:
Weighted-average shares outstanding for basic earnings per share68,853 59,128 58,899 
Common equivalent shares:
Effect of stock-based compensation awards and warrants7,363 803 10,449 
Weighted-average shares outstanding assuming dilution76,216 59,931 69,348 
Basic earnings per share from continuing operations$3.33 $0.42 $1.02 
Diluted earnings per share from continuing operations$2.80 0.42 $0.78 
Basic weighted average shares outstanding for purposes of basic earnings per share are less than the shares outstanding due to 283,139 shares, 365,100 shares and 317,600 shares of restricted stock for 2021, 2020 and 2019, respectively, which are accounted for as part of diluted weighted average shares outstanding in diluted earnings per share.
The determination of diluted earnings per share requires the exclusion of the fair value re-measurement of the stock warrants recorded as a liability (see Note C), if such warrants have an anti-dilutive effect on earnings per share. The dilutive effect of the weighted-average diluted shares outstanding is calculated using the treasury method for periods in which equivalent shares have a dilutive effect on earnings per share. Under this method, the number of diluted shares is determined by dividing the assumed proceeds of the warrants recorded as a liability by the average stock price during the period and comparing that amount with the number of corresponding warrants outstanding.


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NOTE N—SEGMENT AND REVENUE INFORMATION
The Company operates in two reportable segments. The CAM segment consists of the Company's aircraft and engine leasing operations. The ACMI Services segment consists of the Company's airline operations, including CMI agreements as well as ACMI, charter service and passenger service agreements that the Company has with its customers. The Company's aircraft maintenance services, aircraft modification services, ground services and other support services, are not large enough to constitute reportable segments and are combined in All other. Intersegment revenues are valued at arms-length market rates.
The Company's segment information from continuing operations is presented below (in thousands):
 Year Ended December 31
 202120202019
Total revenues:
CAM$370,287 $308,661 $285,276 
ACMI Services1,185,128 1,147,279 1,078,288 
All other375,571 334,300 314,014 
Eliminate inter-segment revenues(196,704)(219,665)(225,395)
Total$1,734,282 $1,570,575 $1,452,183 
Customer revenues:
CAM$273,288 $205,047 $168,106 
ACMI Services1,185,113 1,147,252 1,078,143 
All other275,881 218,276 205,934 
Total$1,734,282 $1,570,575 $1,452,183 
The Company's external customer revenues from other activities for the years ending December 31, 2021, 2020 and 2019 are presented below (in thousands):
Year Ended December 31,
202120202019
Aircraft maintenance, modifications and part sales$127,378 $114,425 $117,772 
Ground services99,133 73,949 69,596 
Other, including aviation fuel sales49,370 29,902 18,566 
Total customer revenues$275,881 $218,276 $205,934 
The Company recognized $3.0 million of non lease revenue that was reported in deferred revenue at the beginning of the year, compared to $2.8 million in 2020. Current deferred revenue of $8.3 million and $3.0 million as of December 31, 2021 and 2020, respectively, for contracts with customers is derived from other activities as described above. Revenue related to deferred revenue will be recognized based on percentage of completion. Customers are required to pay deposits and may be required to make milestone payments for these services resulting in deferred revenue. Long-term contract assets were $0.8 million as of December 31, 2021 compared to $0.0 million as of December 31, 2020. Cash will be collected over the term of the multi-year agreement based on number cycles per period while revenue is recognized as parts are provided for engine maintenance services. This may result in a contract asset or liability based on the timing of engine maintenance services.
CAM's leases do not contain residual guarantees. Approximately 13% of CAM's leases to external customers contain purchase options at projected market values. As of December 31, 2021, minimum future payments from external customers for leased aircraft and equipment were scheduled to be $250.8 million, $206.3 million, $156.3 million, $146.4 million and $128.3 million, respectively, for the next 5 years ending December 31, 2026 and $311.3 million thereafter. CAM's external customer revenues for non-lease activities were $18.6 million and $6.2 million during 2021 and 2020 respectively for engine services and the sale of spare engine parts. ACMI Services external
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customer revenues included approximately $13.2 million, $13.2 million and $9.5 million for the years ended December 31, 2021, 2020 and 2019, respectively, for the rental income of specific aircraft included in the consideration paid by customers under certain contracts.
The Company had revenues of approximately $701.9 million, $699.2 million and $716.9 million for 2021, 2020 and 2019, respectively, derived primarily from aircraft leases in foreign countries, routes with flights departing from or arriving in foreign countries or aircraft maintenance and modification services performed in foreign countries. All revenues from the CMI agreement with DHL and the ATSA agreement with ASI are attributed to U.S. operations. As of December 31, 2021 and 2020, the Company had 21 and 22 aircraft, respectively, deployed outside of the United States.
The Company's other segment information from continuing operations is presented below (in thousands):
 Year Ended December 31,
 202120202019
Depreciation and amortization expense:
CAM$203,675 $172,003 $158,470 
ACMI Services101,541 101,748 96,191 
All other3,232 4,316 2,871 
Total$308,448 $278,067 $257,532 
Interest expense
CAM38,160 39,304 38,300 
ACMI Services18,066 20,542 24,950 
Segment earnings (loss):
CAM$106,161 $77,424 $68,643 
ACMI Services158,733 114,128 32,055 
     All other112 (5,933)13,422 
Net unallocated interest expense(2,525)(2,825)(3,024)
Impairment of aircraft and related assets— (39,075)— 
Net gain (loss) on financial instruments29,979 (100,771)(12,302)
Transaction fees— — (373)
Debt issuance costs(6,505)— — 
Other non-service components of retiree benefit costs, net17,827 12,032 (9,404)
Loss from non-consolidated affiliate(2,577)(13,587)(17,445)
Pre-tax earnings from continuing operations$301,205 $41,393 $71,572 
The Company's assets are presented below by segment (in thousands). Cash and cash equivalents are reflected in Assets - All other.
December 31
 202120202019
Assets:
CAM$2,218,012 $2,037,628 $1,857,687 
ACMI Services872,311 811,516 830,620 
All other177,012 152,601 131,871 
Total$3,267,335 $3,001,745 $2,820,178 
During 2021, the Company had capital expenditures for property and equipment of $86.5 million and $415.8 million for the ACMI Services and CAM, respectively.
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NOTE O—DISCONTINUED OPERATIONS
The Company's results of discontinued operations consist primarily of changes in liabilities related to benefits for former employees previously associated with ABX's former hub operation for DHL. The Company may incur expenses and cash outlays in the future related to pension obligations, self-insurance reserves for medical expenses and wage loss for former employees. For the years ending December 31, 2021 and 2020, the Company had liabilities of $3.8 million and $7.2 million, respectively, for employee compensation and benefits. During 2021, 2020 and 2019, pre-tax earnings from discontinued operations were $3.2 million, $9.1 million and $1.6 million, respectively.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
None.

ITEM 9A. CONTROLS AND PROCEDURES
(a) Evaluation of Disclosure Controls and Procedures
As of December 31, 2021, the Company carried out an evaluation, under the supervision and with the participation of the Company's Chief Executive Officer and Chief Financial Officer of the effectiveness of the design and operation of the Company's disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")). Based upon the evaluation, the Company's Chief Executive Officer and Chief Financial Officer concluded that the Company's disclosure controls and procedures were effective to ensure that information required to be disclosed by the Company in the reports filed or submitted by it under the Exchange Act is recorded, processed, summarized and reported within time periods specified in the Securities and Exchange Commission rules and forms and is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.
(b) Changes in Internal Controls
There were no changes in internal control over financial reporting during the most recently completed fiscal year that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.

Management’s Annual Report on Internal Controls over Financial Reporting
The management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting. The Company’s internal control system is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes, in accordance with generally accepted accounting principles.
All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.
The Company’s management assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2021. In making this assessment, it used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control—Integrated Framework (2013).
Based on management’s assessment of those criteria, management believes that, as of December 31, 2021, the Company’s internal control over financial reporting was effective.
The effectiveness of our internal controls over financial reporting as of December 31, 2021 has been audited by our independent registered accounting firm as stated in its attestation report that follows this report.
March 1, 2022

84


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Stockholders and the Board of Directors of Air Transport Services Group, Inc.
Opinion on Internal Control over Financial Reporting
We have audited the internal control over financial reporting of Air Transport Services Group, Inc. and subsidiaries (the “Company”) as of December 31, 2021, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements and financial statement schedules as of and for the year ended December 31, 2021, of the Company and our report dated March 1, 2022, expressed an unqualified opinion on those consolidated financial statements and financial statement schedule.
Basis for Opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Annual Report on Internal Controls over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and Limitations of Internal Control over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Deloitte & Touche LLP
Cincinnati, Ohio
March 1, 2022
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ITEM 9B. OTHER INFORMATION
None.

ITEM 9C. DISCLOSURE REGARDING JURISDICTIONS THAT PREVENT INSPECTION
Not applicable.

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
The response to this Item is incorporated herein by reference to the definitive Proxy Statement for the 2022 Annual Meeting of Stockholders under the captions “Election of Directors,” "Delinquent Section 16(a) Reports” and “Corporate Governance and Board Matters.”

ITEM 11. EXECUTIVE COMPENSATION
The response to this Item is incorporated herein by reference to the definitive Proxy Statement for the 2022 Annual Meeting of Stockholders under the captions “Executive Compensation” and “Director Compensation.”

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS
The responses to this Item are incorporated herein by reference to the definitive Proxy Statement for the 2022 Annual Meeting of Stockholders under the captions “Equity Compensation Plan Information,” “Voting at the Meeting,” “Stock Ownership of Management” and “Common Stock Ownership of Certain Beneficial Owners.”

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE
The response to this Item is incorporated herein by reference to the definitive Proxy Statement for the 2022 Annual Meeting of Stockholders under the captions “Related Person Transactions” and “Independence.”

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES
The response to this Item is incorporated herein by reference to the definitive Proxy Statement for the 2022 Annual Meeting of Stockholders under the caption “Fees of the Independent Registered Public Accounting Firm.”

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PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
(a)List of Documents filed as part of this report:
(1)Consolidated Financial Statements
The following are filed in Part II, Item 8 of this Form 10-K Annual Report:
Report of Independent Registered Public Accounting Firm (PCAOB ID No. 34)
Consolidated Balance Sheets
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income
Consolidated Statements of Cash Flows
Consolidated Statements of Stockholders’ Equity
Notes to Consolidated Financial Statements 
(2)Financial Statement Schedules
Schedule II—Valuation and Qualifying Account
DescriptionBalance at
beginning
of period
Additions charged to
cost and expenses
DeductionsBalance at end
of period
Accounts receivable reserve:
Year ended:
December 31, 2021$996,860 $168,360 $423,414 $741,806 
December 31, 2020974,882 880,967 858,989 996,860 
December 31, 20191,443,805 2,277,217 2,746,140 974,882 
All other schedules are omitted because they are not applicable or are not required, or because the required information is included in the consolidated financial statements or notes thereto.
(3)Exhibits
The following exhibits are filed with or incorporated by reference into this report.
Exhibit No.Description of Exhibit
Articles of Incorporation
3.1
3.2
3.3
87


Instruments defining the rights of security holders
4.1
4.2
4.3
4.4
4.5
4.6
Material Contracts
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
10.11
10.12
10.13
10.14
88


10.15
10.16
10.17
10.18
10.19
10.20
10.21
10.22
10.23
10.24
10.25
10.26
10.27
10.28
10.29
89


10.30
10.31
10.32
10.33
10.34
10.35
10.36
10.37
10.38
10.39
10.40
10.41
10.42
10.43
10.44
90


10.45
10.46
10.47
10.48
10.49
10.50
10.51
10.52
10.53
10.54
10.55
10.56
10.57
10.58
10.59
10.60
10.61
10.62
91


10.63
10.64
10.65
10.66
10.67
10.68
10.69
10.70
10.71
10.72
10.73
10.74
10.75
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Code of Ethics
14.1Code of Ethics—CEO and CFO. (1)
List of Significant Subsidiaries
21.1
Consent of experts and counsel
23.1
Certifications
31.1
31.2
32.1
32.2
101.INSXBRL Instance Document
101.SCHXBRL Taxonomy Extension Schema Document
101.CALXBRL Taxonomy Extension Calculation Linkbase Document
101.DEFXBRL Taxonomy Extension Definition Linkbase Document
101.LABXBRL Taxonomy Extension Labels Linkbase Document
101.PREXBRL Taxonomy Extension Presentation Linkbase Document
____________________
(1)The Company's Code of Ethics can be accessed from the Company's Internet website at www.atsginc.com.
(2)Incorporated by reference to the Company’s Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on August 14, 2007.
(3)Incorporated by reference to the Company’s Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on August 10, 2009.
(4)Incorporated by reference to the Company’s Annual Report on Form 10-K filed on March 17, 2008 with the Securities and Exchange Commission.
(5)Incorporated by reference to the Company's Proxy Statement for the 2019 Annual Meeting of Stockholders, Corporate Governance and Board Matters, filed March 29, 2019 with the Securities and Exchange Commission.
(6)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 10, 2010.
(7)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 3, 2010. Those portions of the Agreement marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC.
(8)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 3, 2011.
(9)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on June 18, 2012.
(10)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on July 24, 2012.
(11)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 2, 2012.
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(12)Incorporated by reference to the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 4, 2013. Those portions of the Agreement marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC.
(13)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on March 24, 2020.
(14)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 6, 2013.
(15)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 12, 2014.
(16)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 5, 2014.
(17)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 8, 2015, as amended by the Company's Quarterly Report on Form 10-Q/A filed with the Securities and Exchange Commission on August 7, 2015.
(18)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 7, 2015.
(19)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 10, 2016.
(20)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2016.
(21)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on March 15, 2016.
(22)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on June 27, 2016.
(23)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 8, 2017.
(24)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on June 2, 2017.
(25)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on September 29, 2017.
(26)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on September 25, 2017.
(27)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 9, 2017.
(28)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2018.
(29)Incorporated by reference to the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 1, 2019.
(30)Incorporated by reference to the Company's Annual Report on Form 10-K/A filed with the Securities and Exchange Commission on March 29, 2019.
(31)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 6, 2019.
(32)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on May 29, 2019.
(33)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on November 6, 2019.
(34)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on January 28, 2020.
(35)Incorporated by reference to the Company's Annual Report on Form 10-K, filed with the Securities and Exchange Commission on March 2, 2020.
(36)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 7, 2020.
(37)Incorporated by reference to the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 1, 2021.
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(38)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on April 6, 2021.
(39)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on April 13, 2021.
(40)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 10, 2021

ITEM 16. FORM 10-K SUMMARY
None.

95


SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Air Transport Services Group, Inc.
 
Signature  Title Date
/S/    RICHARD F. CORRADO
  Chief Executive Officer (Principal Executive Officer) March 1, 2022
Richard F. Corrado
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons in the capacities and on the date indicated:
 
SignatureTitle Date
/S/    JOSEPH C. HETE
Director and Chairman of the BoardMarch 1, 2022
Joseph C. Hete
/S/    RICHARD M. BAUDOUIN
Director March 1, 2022
Richard M. Baudouin
/S/    PHYLLIS J. CAMPBELL
DirectorMarch 1, 2022
Phyllis J. Campbell
/S/    RICHARD F. CORRADO
Director, President and Chief Executive Officer (Principal Executive Officer) March 1, 2022
Richard F. Corrado
/S/    RAYMOND E. JOHNS JR.
DirectorMarch 1, 2022
Raymond E. Johns, Jr.
/S/    LAURA J. PETERSON
DirectorMarch 1, 2022
Laura J. Peterson
/S/    RANDY D. RADEMACHER
Lead Independent DirectorMarch 1, 2022
Randy D. Rademacher
/S/    J. CHRISTOPHER TEETS
Director March 1, 2022
J. Christopher Teets
/S/    JEFFREY J. VORHOLT
Director March 1, 2022
Jeffrey J. Vorholt
/S/    PAUL S. WILLIAMS
DirectorMarch 1, 2022
Paul S. Williams
/S/    QUINT O. TURNER
Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer) March 1, 2022
Quint O. Turner

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