GLAUKOS Corp - Annual Report: 2020 (Form 10-K)

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SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 10-K

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(Mark one)

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☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

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For the fiscal year ended December 31, 2020

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OR

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☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

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For the transition period from:                          to                          

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Commission File No. 001-37463

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GLAUKOS CORPORATION

(Exact name of registrant as specified in its charter)

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(949) 367-9600

(Registrant’s telephone number, including area code)

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Securities registered pursuant to Section 12(b) of the Act:

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Securities registered pursuant to Section 12(g) of the Act: None.

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Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.   Yes  ☒   No  ☐

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Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.   Yes  ☐   No  ☒

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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   ☐

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Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation 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 ☐

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Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company or an emerging growth company. (See definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act).

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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.    ☐

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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. ☒

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Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes  ☐   No  ☒

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As of June 30, 2020, the last business day of the registrant’s most recently completed second quarter, the aggregate market value of common stock held by non-affiliates of the registrant, based on the closing sales price for the registrant’s common stock as reported on The New York Stock Exchange, was $1,634 million.

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The number of shares of the Registrant’s common stock outstanding as of February 25, 2021 (latest practicable date) was 45,786,180 shares.

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DOCUMENTS INCORPORATED BY REFERENCE

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Portions of the Registrant's Proxy Statement for the 2021 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the close of the registrant's fiscal year ended December 31, 2020.​

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TABLE OF CONTENTS

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We use Glaukos, our logo, iStent, iStent inject, iStent Infinite, iStent SA, iPrism, iDose, iPRIME, MIGS, Avedro, Photrexa, iLink, KXL, Mosaic and other marks as trademarks. This report contains references to our trademarks and service marks and to those belonging to other entities. Solely for convenience, trademarks and trade names referred to in this report, including logos, artwork and other visual displays, may appear without the ® or ™ symbols, but such references are not intended to indicate in any way that we will not assert, to the fullest extent under applicable law, our rights or the rights of the applicable licensor to these trademarks and trade names. We do not intend our use or display of other entities’ trade names, trademarks or service marks to imply a relationship with, or endorsement or sponsorship of us by, any other entity.

References throughout this document to the “Company,” “we,” “us,” “our,” or “Glaukos” refer to Glaukos Corporation and its consolidated subsidiaries.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS AND INDUSTRY DATA

This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (Securities Act), and Section 21E of the Securities Exchange Act of 1934, as amended (Exchange Act). These statements are based on management’s beliefs and assumptions and on information currently available to management. Some of the statements under Item 1 - “Business,” Item 1A - “Risk Factors,” Item 7 - “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in this Annual Report on Form 10-K contain forward-looking statements. In some cases, you can identify forward-looking statements by the following words: “may,” “will,” “could,” “would,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” “continue,” “ongoing” or the negative of these terms or other comparable terminology, although not all forward-looking statements contain these words.

These statements involve risks, uncertainties and other factors that may cause actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements. Although we believe that we have a reasonable basis for each forward-looking statement contained in this Annual Report on Form 10-K, we caution you that these statements are based on a combination of facts and factors currently known by us and our projections of the future, about which we cannot be certain.

In addition, you should refer to the “Risk Factors” section of this Annual Report on Form 10-K for a discussion of important factors that may cause actual results to differ materially from those expressed or implied by the forward-looking statements. As a result of these factors, we cannot assure you that the forward-looking statements in this Annual Report on Form 10-K will prove to be accurate. Furthermore, if the forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame, or at all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

This Annual Report on Form 10-K contains market data and industry forecasts that were obtained from industry publications. These data involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such information. Although we believe that the industry publications on which the market and industry statements are based are reliable and we are not aware of any misstatements regarding any market data or industry forecasts presented herein, we have not independently verified any of the third party information. Statements in this Annual Report on Form 10-K regarding our market position, market opportunity, market size and our general expectations involve risks and uncertainties and are subject to change based on various factors, including those discussed under Item 1A - “Risk Factors” and Item 7 - “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included elsewhere in this Annual Report on Form 10-K.

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PART I

ITEM 1.BUSINESS

Overview

Glaukos is an ophthalmic medical technology and pharmaceutical company focused on developing novel therapies for the treatment of glaucoma, corneal disorders, and retinal disease. We developed Micro-Invasive Glaucoma Surgery (MIGS) to serve as an alternative to the traditional glaucoma treatment paradigm and launched our first MIGS device commercially in 2012. We have developed a proprietary bio-activated pharmaceutical therapy for the treatment of a corneal disorder, keratoconus, that was approved by the U.S. Food and Drug Administration (FDA) in 2016. We are also developing a pipeline of surgical devices, sustained pharmaceutical therapies, and implantable biosensors intended to treat glaucoma progression, corneal disorders such as keratoconus, dry eye and refractive vision correction, and retinal diseases such as neovascular age-related macular degeneration (AMD), diabetic macular edema (DME), and retinal vein occlusion (RVO).

Ophthalmic diseases and disorders are a national and global health concern and, as the population ages, the number of individuals with vision impairment and blindness is increasing. Moreover, improving access to cost-effective tools is increasing the diagnosis of sight-threatening ocular diseases globally and driving demand for innovative products, technologies, and therapies that improve clinical outcomes, and provide ease of use and reliability. In response to the significant unmet needs that exist within ophthalmology we have designed commercial and development-stage solutions to provide ophthalmologists with treatment options.

Our commercial solutions and development-stage product candidates include:

•MIGS products that primarily involve the insertion of a micro-scale device or drug delivery system designed to reduce intraocular pressure (IOP) by restoring the natural aqueous humor outflow pathways for patients suffering from glaucoma and MIGS biosensors to measure pressure within the eye;

•topical pharmaceuticals that are bio-activated on the eye by one of our proprietary systems intended to strengthen, stabilize, and reshape the cornea for patients impacted by corneal ectatic disorders or refractive disorders; and

•topical pharmaceuticals that are applied to the eyelid and meant to treat dry eye, glaucoma and other ocular surface diseases and disorders, and

•proprietary micro-invasive, bio-erodible sustained release drug delivery implants that are designed to elute pharmaceuticals over time to improve the vision of patients impacted by retinal diseases such as AMD, DME, RVO, and diabetic retinopathy (DR).

Impact of COVID-19 Pandemic and Current Economic Environment

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In December 2019, a novel strain of coronavirus (COVID-19) emerged in Wuhan, Hubei Province, China. The World Health Organization declared COVID-19 to be a “pandemic,” spreading across the globe and impacting worldwide economic activity. In the U.S., certain federal, state and local governmental authorities issued stay-at-home and other orders, proclamations and/or directives, including restrictions on elective procedures and therapies, aimed at minimizing the spread of COVID-19. Although some of these governmental restrictions have since been lifted or scaled back, recent surges of COVID-19 have in some cases led, and future surges could lead, to the reinstitution of stay-at-home or other orders and may further result in restrictions being re-implemented in response to efforts to reduce the spread of COVID-19. Even if stay-at-home or other orders are removed, potential patients may elect to stay at home voluntarily. The COVID-19 pandemic and subsequent economic slowdown has materially impacted the global demand for our products, which are used in procedures and therapies that are considered elective. This decrease in demand was most significantly felt in the latter part of the quarter ended March 31, 2020 and the earlier part of the quarter ended June 30, 2020. Beginning in May 2020, we began to see an early recovery toward more normalized levels for cataract and

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keratoconus procedures, a trend that continued through the quarter ended December 31, 2020. The ultimate impact of the COVID-19 pandemic on our operations going forward is unknown and will depend on future developments which are highly uncertain and cannot be predicted with confidence, including the duration and severity of the COVID-19 outbreak, the status of health and safety actions taken to contain its spread and any additional preventative and protective actions that governments, or we, may take, any future surges of COVID-19 that may occur, the dynamics associated with the rollout of the COVID-19 vaccines, and how quickly and to what extent economic and operating conditions normalize within the markets in which we operate. For additional information, see the section titled Risks Related to Our Business within Item 1A. Risk Factors of this Annual Report on Form 10-K.

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We have taken a number of steps aimed at minimizing the spread of COVID-19 and protecting our employees, including shifting the majority of our workforce to remote operations, which continues through the date hereof. We have maintained streamlined manufacturing and assembly processes in order to consistently provide product to our customers who depend on us. In addition to other health and safety protocols that follow applicable guidance and regulations, employees involved in such operation-critical processes have been organized into a number of small shifts designed to minimize the time any one individual is required to be onsite. Further, in an effort to identify, and avoid further infection from, asymptomatic cases, we have offered periodic voluntary COVID-19 viral testing to on-site employees.

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We also sought to preserve our cash position by instituting a number of cost saving initiatives, the majority of which have been reinstated, although we continue to carefully manage our discretionary spending. These actions were designed to preserve jobs and core research and development programs. Further, in June 2020, we issued an aggregate principal amount of $287.5 million of 2.75% convertible notes due 2027 (the Convertible Notes), the net proceeds of which will be used for working capital and general corporate purposes. As of December 31, 2020, we had cash, cash equivalents, short-term investments, and restricted cash of approximately $413.9 million, compared to $183.3 million as of December 31, 2019.

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We continue to actively assess the impact of COVID-19 on our clinical trials and other pipeline products. The closure of ophthalmic practices and deferral of elective procedures beginning in the first quarter of 2020 in response to COVID-19 disrupted new patient enrollment in our ongoing clinical trials. This disruption has continued even as facilities have reopened as doctors prioritize their standard procedures over clinical trial enrollment. In particular, patient enrollment for our iDose clinical trials remains impacted, which has delayed our estimated iDose approval timeline, where we now expect a potential FDA approval of this product in 2023.

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Material Changes and Transactions

Glaukos was formed in 1998 with a focus on treating glaucoma progression, initially developing MIGS to serve as an alternative to traditional glaucoma treatment and management paradigms. We launched the iStent, our first MIGS device, in the U.S. in 2012, our next-generation iStent inject device in late 2018, and our latest iStent inject W device in the second half of 2020, while also developing a broader portfolio of development-stage product candidates designed to treat glaucoma progression. In recent years, we began to execute a long-term strategy that leverages our core competencies and extends our focus to include therapies for chronic eye diseases beyond glaucoma into corneal disorders and retinal health.

In June 2020, we issued $287.5 million in aggregate principal amount of 2.75% convertible notes due 2027 (the Convertible Notes), the proceeds of which are expected to be used for working capital and general corporate purposes.

Products and Pipeline

The Company operates in one operating segment as our primary business activity is the development and commercialization of therapies across several end markets within ophthalmology. In an effort to provide greater visibility into our performance and progress, the following discussion is presented based on our three principal franchises: glaucoma, corneal disorders and retinal diseases.

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Glaucoma

Glaucoma is a group of eye diseases characterized by progressive, irreversible and largely asymptomatic vision loss in which elevated levels of IOP are often associated with optic nerve damage that can cause blindness. While some glaucoma patients do not experience an increase in IOP, it is widely considered a major risk factor in glaucoma’s progression, and reduction in IOP is the only clinically proven treatment for the disease. Elevated IOP occurs when aqueous humor is not circulating normally or properly draining from the front part of the eye.

We have three primary commercialized products designed to treat mild-to-moderate open-angle glaucoma, the iStent, the iStent inject, and the iStent inject W. The iStent, the iStent inject, and the iStent inject W are FDA-approved micro-bypass stents that improve aqueous humor outflow inserted through the small corneal incision made during cataract surgery. Our iStent, which reduces IOP by restoring the natural physiologic pathways for aqueous humor, was the first commercially available MIGS treatment solution. Our next generation iStent inject and iStent inject W devices include two stents pre-loaded in an auto-injection system designed to allow the surgeon to inject stents through a single corneal entry. The iStent, iStent inject, and iStent inject W procedures are currently reimbursed in the U.S. by Medicare and all major national private payors. The iStent and iStent inject technologies are commercially available in Japan, Brazil, Canada, Australia, and certain European Union (EU) and other countries, even though reimbursement may not always be available for all such procedures.

We are also developing several pipeline products, including the iStent Infinite, iStent SA and iDose TR, none of which have been commercialized. The iStent Infinite consists of three stents that are designed for use as a standalone procedure in patients with refractory glaucoma. In 2019, we completed patient enrollment of an IDE study of iStent Infinite in order to pursue future FDA clearance. Similar to the iStent inject and the iStent inject W, the iStent SA is a two-stent product that uses a different auto-injection inserter. However, the iStent SA is designed for use as a standalone glaucoma procedure. The iDose drug delivery system is a targeted injectable implant based on our micro-scale device-platform that is designed to continuously deliver therapeutic levels of medication from within the eye for extended periods of time. We commenced our Phase III IND clinical trial for iDose TR in 2018. Additionally, our glaucoma pipeline includes the extended release iDose (TREX), iDose (ROCK), iPrime and the IOP Sensor which are still in a research and development (R&D) stage.

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In addition to our organic R&D efforts, in 2019 we entered into a multi-year agreement with Santen, which appointed us to serve as the exclusive U.S. partner for the sale of the Preserflo MicroShunt, which is currently being studied in an FDA pivotal study and has not yet been approved by the FDA. The MicroShunt is an ab-externo device being developed for treatment of glaucoma where IOP is uncontrolled with maximum tolerated medical therapy or where progression of the disease warrants surgery.

In addition, in 2018 we entered into a research and development collaboration agreement with D. Western Therapeutics Institute (DWTI) in which we are conducting the evaluation and development of novel intraocular products for the treatment of glaucoma using compounds from DWTI’s proprietary Rho Kinase inhibitor compound library.

Corneal Disorders

The cornea, the eye’s outermost layer, is a clear, dome-shaped surface that functions best as a lens when the cornea is strong and shaped properly. The cornea is responsible for the majority of the eye’s total focusing power and corneal disorders, including ectasia, refractive vision errors and dry eye, among others, can cause vision impairment. Corneal ectatic disorders are comprised of a class of diseases characterized by an ectatic, or misshaped, cornea. Corneal ectasia is typically caused by a weakening of the cornea, which can be due to a number of factors, including genetic causes, adverse side effects from ophthalmic refractive procedures such as LASIK, or excessive eye rubbing. We are currently targeting two primary corneal ectatic disorders with our bio-activated pharmaceuticals: keratoconus and corneal ectasia following refractive surgery, although our therapies may also offer benefits to individuals with presbyopia and myopia. Keratoconus is mostly a hereditary, degenerative ectatic disease that is often first seen in older children or young adults in which the typically round, dome-shaped cornea progressively thins and weakens, causing a cone-like corneal bulge due to normal internal pressure of the eye. Corneal ectasia following refractive surgery is a serious complication that involves the cornea becoming weakened following a refractive procedure, such as LASIK, with symptoms similar to naturally occurring keratoconus. Refractive vision errors, or the inability of the cornea to

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properly focus light, are prevalent in the U.S. and abroad and include disorders such as presbyopia and myopia. Presbyopia is a natural part of aging due to the hardening of the eye’s crystalline lens over time, resulting in a loss of lens elasticity or the ability of the lens to change shape in order to focus incoming light on the retina. Myopia, or nearsightedness, is a vision condition in which close objects are seen clearly, but objects farther away appear blurred, and is usually caused by an elongation of the eyeball or a cornea having too much curvature. Presbyopia affects nearly everyone over the age of 40 while myopia first occurs in school-age children and typically progresses until about age 20.

Our pharmaceutical iLink therapies, a suite of novel single-use drug formulations that are bio-activated by our proprietary systems, address both keratoconus and corneal ectasia. These iLink therapies, bioactivated upon the delivery of ultraviolet A (UVA) light to the cornea induce a biochemical reaction called corneal collagen cross-linking, or corneal cross-linking (CXL). CXL strengthens, stabilizes and reshapes the cornea to treat corneal ectatic disorders. The KXL System, which delivers UVA light to a large portion of the cornea, is approved by the FDA for use in the U.S. following removal of the epithelium (often referred to as “iLink epi-off”), a procedure familiar to ophthalmologists. In May 2019, patient enrollment in a pivotal Phase 3 clinical trial was completed to evaluate the safety and efficacy of our latest pharmaceutical iLink therapeutic system for the treatment of keratoconus without the removal of the epithelium (often referred to as “iLink epi-on”). We now expect a potential approval of iLink epi-on product in 2023, with the delay being primarily the result of our decision to change contract drug manufacturers in advance of completing registration batches and, ultimately, commercialization. Outside the U.S., our pharmaceutical therapies can also be administered with the KXL System to address corneal weakening caused by refractive surgery such as LASIK. Our next generation systems are being developed to provide metered beams of UVA light to a targeted portion of the cornea. Our pharmaceutical products bio-activated by these systems may also offer a means of improving the vision of patients with presbyopia, myopia or other corneal diseases.

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We have also entered into an exclusive global licensing arrangement with Intratus to research, develop, manufacture and commercialize a patented, non-invasive transdermal drug delivery platform designed for application on the eyelid in the treatment of dry eye disease, glaucoma, and other ocular surface diseases and disorders.

Retinal Diseases

Retinal diseases vary widely but universally affect the retina, a thin layer of tissue inside the back wall of the eye containing light-sensitive cells that convert light into neural signals. Most retinal diseases cause visual impairment, including blurred or distorted vision and vision loss. Our R&D efforts in our retinal franchise are focused on treating AMD, DME, RVO, and other retinal diseases. AMD is a progressive disease that occurs when the macula, the central portion of the retina, is impaired, which can result in severe vision problems. DME is highly prevalent among individuals with type 2 diabetes and is associated with DR, the impairment of small blood vessels in the retina caused by increased glucose levels. Advanced DR can lead to fluid leaking into the macula, which causes DME and severe vision impairment. RVO occurs when the flow of blood from the retina is blocked, often due to a blood clot blocking the retinal vein, which can result in severe vision problems.

We are developing sustained release pharmaceutical retinal platforms leveraging our expanded pharmaceutical and sustained drug delivery R&D capabilities, including Triamcinolone Acetonide SR, Multi-Kinase Inhibitor SR and Anti-VEGF SR. If commercialized, these platforms would be designed to treat AMD, DME, RVO, and other retinal diseases. The focus of our retinal research and development efforts is to develop potential treatment options with a longer duration-of-effect than current standards of care products.

Research & Development

We devote significant resources to our R&D efforts, which are focused on developing new products, and enhancing the effectiveness, ease of use, safety, and reliability of our commercialized products. Our R&D objectives are:

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A considerable portion of our R&D investment includes clinical trials and the collection of evidence that provide data for use in regulatory submissions and required post-market approval studies involving applications of our products. We expect our R&D and clinical expenditures to increase as we continue to devote significant resources to clinical trials and regulatory approvals of our pipeline products. We currently conduct R&D activities primarily in the U.S. but are expanding our clinical capabilities to sites outside the U.S.

Sales and Marketing

Our global sales efforts and promotional activities are currently aimed at ophthalmic surgeons and other eye care professionals and our primary customers include ambulatory surgery centers, hospitals and physician private practices. In the U.S., we sell our products through a direct sales organization. Outside the U.S., we sell our products through direct sales organizations in sixteen countries and a network of distribution partners in other markets where we do not have a direct commercial presence or maintain a modest commercial presence. In 2020, sales to customers inside and outside the U.S. accounted for 77% and 23% of our net sales, respectively. No single customer or distributor accounted for more than 10% of our total net sales in 2020. For the year ended December 31, 2020, our iStent technologies, the iStent, the iStent inject, and the iStent inject W and related accessories, which comprise our key product family, accounted for approximately 80% of our net sales, while our iLink therapies accounted for approximately 20% of our net sales.

Competition

The medical technology and pharmaceutical industries are highly competitive. We may compete with many companies, including divisions of companies much larger than us that may have greater resources and name recognition, and smaller companies that compete against specific products or in certain geographies. Furthermore, new product development, discoveries, and technological change characterize the areas in which we compete. Our present or future products could be rendered obsolete as a result of advances by one or more of our present or future competitors or by other surgical or pharmaceutical therapy development. We must continue to develop and commercialize new products, technologies, and therapies to remain competitive in the ophthalmology industry. We believe that we compete primarily on the basis of clinical superiority supported by extensive data, and innovative features that enhance patient benefit, product performance, and safety.

The ophthalmic segment of the medical technology and pharmaceutical industries is dynamic and subject to significant change due to cost-of-care considerations, regulatory reform, industry and customer consolidation, and evolving patient needs. The ability to provide products, technologies, and therapies that demonstrate value, are reimbursed through government or third-party payors, improve clinical outcomes and provide ease of use and reliability is becoming increasingly important for companies within ophthalmology.

In glaucoma, our MIGS offerings primarily compete against Ivantis, however there are a considerable number of large and small companies providing more invasive surgical glaucoma technologies, laser-based therapies, and pharmaceuticals that may provide indirect competition or with whom we may compete should our broad clinical development pipeline be approved and commercialized. In corneal disorders, we have, under an orphan drug designation, the only FDA approved bio-activated pharmaceutical therapy for the treatment of keratoconus, but globally we compete against numerous providers of corneal crosslinking therapies such as PeschkeTrade GmBH. Our corneal disorder pipeline, if approved, would vastly expand our competition to numerous large companies such as AbbVie Inc., Alcon and Johnson & Johnson, and small companies that provide medical technology and pharmaceutical therapies for several areas including dry eye and refractive conditions. Our retinal health pipeline, if approved, may face substantial competition from large pharmaceutical companies such as AbbVie Inc., Novartis AG, Genentech/Roche, Regeneron, and Bayer, and there are also a considerable number of large and small companies with development efforts in the field.

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Facilities, Manufacturing and Distribution

Our corporate headquarters and our manufacturing operations for the iStent, iStent inject and iStent inject W are located in an approximately 98,000 square foot campus in San Clemente, California which is comprised of two main buildings. Our pharmaceutical therapies for keratoconus are primarily manufactured and supplied by third parties in the U.S. and Germany. We lease approximately 27,000 square feet of office and laboratory space in Waltham, Massachusetts, and our manufacturing operations for the majority of our proprietary systems are located in Burlington, Massachusetts, with some limited manufacturing operations in Dublin, Ireland. In the fourth quarter of 2018, we entered into an office building lease pursuant to which we lease one property containing three existing office buildings, comprising approximately 160,000 rentable square feet of space, located in Aliso Viejo, California (Aliso Facility). The term of the Aliso Facility lease commenced on April 1, 2019 and will continue for thirteen years, with an option to extend the lease for two additional five-year periods at market rates. We intend to relocate our corporate administrative headquarters, along with certain laboratory, research and development and warehouse space previously based in San Clemente, to the Aliso Facility. We currently intend to maintain manufacturing facilities for the iStent, iStent inject, and iStent inject W at our San Clemente location for the foreseeable future. Our international subsidiaries also lease facilities in Australia, Brazil, Canada, Germany, Japan and the United Kingdom.

Intellectual Property

The strength of our competitive position depends substantially upon our ability to obtain and enforce intellectual property rights protecting our technology both domestically and internationally. We rely on a combination of intellectual property rights, including patents, trademarks, service marks, copyrights, trade secrets and other similar intellectual property, as well as customary contractual protections and security measures used to protect our proprietary, trade secret information.

In the aggregate, our intellectual property assets are of material importance to our business. We are significantly dependent on our patent and other intellectual property rights and the failure to protect such rights could negatively impact our ability to sell current or future products or prohibit us from enforcing our patents or other intellectual property rights against others. For additional information see the section titled Risks Related to Our Intellectual Property within Item 1A. Risk Factors of this Annual Report on Form 10-K.

As of December 31, 2020, we owned or exclusively licensed in certain fields of use over 300 issued patents, pending U.S. patent applications, issued foreign patents and pending foreign patent applications. We may, from time to time, choose to acquire or license additional patents and patent applications, or we may choose to abandon, sell, or license certain Company patents and patent applications, depending on our needs. The issued patents that protect our commercial products and current product pipeline expire between 2021 and 2038.

Government Regulation

Our products and operations are subject to extensive and rigorous regulation by federal, state, and local authorities, as well as foreign regulatory authorities. These governmental agencies regulate, among other things, the research, development, testing, manufacturing, approval, labeling, storage, recordkeeping, advertising, promotion and marketing, distribution, post approval monitoring and reporting, and import and export of medical devices and drugs (including drug/device combination products) in their respective jurisdictions to assure the safety and effectiveness of medical products and pharmaceuticals for their intended use. In general, there has been a trend of increased regulation of medical device and drug products, which has resulted in, and will likely continue to result in, increased prices to bring new products to market.

Regulation & Reimbursement in the United States

The FDA has broad regulatory authority over medical devices and drugs in the U.S. The FDA regulates, among other things, product safety, efficacy, manufacturing, advertising, labeling and safety reporting.

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Medical Device Requirements

Each medical device commercially distributed in the United States requires one of the following: (i) clearance under a 510(k) premarket notification;(ii) approval under a Premarket Approval (PMA) application; (iii) approval of a de-novo classification petition; or (iv) approval under an IDE.

The FDA classifies devices into one of three classes—Class I, Class II or Class III—depending on the degree of risk associated with each medical device and the extent of manufacturing and regulatory control needed to ensure its safety and effectiveness. Class III devices, which include our iStent products that produce the majority of our revenue, are deemed to pose the greatest risk, such as life-sustaining, life-supporting or implantable devices and devices deemed not substantially equivalent to a predicate device. Class III devices require FDA approval of the more demanding PMA application before marketing of a Class III device can proceed.

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PMA Approval Pathway

Class III devices typically require a PMA before they can be marketed. In a PMA, the manufacturer must demonstrate that the device is safe and effective for its intended use, and the PMA must be supported by extensive data, including data from preclinical studies and human clinical trials. If the FDA accepts the application for review, it has 180 days under the FDCA to complete its review of a PMA, although in practice, the FDA’s review can take up to several years. The FDA will generally conduct a pre-approval inspection of the applicant or its third-party manufacturers’ or suppliers’ manufacturing facility or facilities to ensure compliance with the QSR. Even after a PMA approval, the FDA may require post-approval conditions to ensure the safety and effectiveness of the device, including additional clinical studies or post-market surveillance. Failure to comply with the conditions of approval can result in material adverse enforcement action, including withdrawal of the approval. Certain changes to an approved device, such as changes in manufacturing facilities, methods, or quality control procedures, or changes in the design performance specifications, which may affect the safety or effectiveness of the device, require submission of a PMA supplement.

Clinical Trials of Medical Devices

Clinical trials are almost always required to support a PMA for a Class III device. All clinical investigations must be conducted in accordance with the FDA’s IDE regulations. If the device presents a “significant risk,” to human health, as defined by the FDA, the FDA requires the device sponsor to submit an IDE application to the FDA, showing with appropriate data that it is safe to test the device in humans and that the testing protocol is scientifically sound.

Regardless of the degree of risk presented by the medical device, clinical studies must be approved by, and conducted under the oversight of, an Institutional Review Board (IRB) for each clinical site, which is responsible for the initial and continuing review of the IDE. During a study, the sponsor and any clinical investigators are required to comply with the applicable FDA requirements. After a trial begins, the sponsor, the FDA or the IRB could suspend or terminate a clinical trial at any time for various reasons, including a belief that the risks to study subjects outweigh the anticipated benefits.

Post-Market Regulation

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After a device is approved for marketing, numerous and pervasive regulatory requirements continue to apply. These include:

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The FDA has broad regulatory compliance and enforcement powers. If the FDA determines that we failed to comply with applicable regulatory requirements, it can take a variety of compliance or enforcement actions, which may result in any of the following sanctions:

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Drug Requirements

The development and commercialization of drug products is subject to extensive regulation by governmental authorities in the U.S. and other countries. Before marketing in the U.S., a drug must undergo rigorous preclinical and clinical studies and an extensive regulatory approval process implemented by the FDA under the FDCA.

Before commencing clinical studies in humans in the US, we must submit to the FDA an investigational new drug application (IND) that includes, among other things, the general investigational plan and protocols for specific human studies and the results of preclinical studies. Once clinical studies have begun under the IND, they are usually conducted in three phases and under FDA oversight. These phases generally include the following:

Phase 1. Introduction into patients or healthy human volunteers and is tested for safety, dose tolerance and pharmacokinetics.

Phase 2. Introduction into a limited patient population to assess the efficacy of the drug in specific, targeted indications, assess dosage tolerance and optimal dosage, and identify possible adverse effects and safety risks.

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Phase 3. Expansion to further demonstrate clinical efficacy, optimal dosage and safety within an expanded patient population.

The results of drug development, preclinical studies and clinical studies must be submitted to the FDA as part of a New Drug Application (NDA). The NDA also must contain extensive manufacturing information. The Prescription Drug User Fee Act (PDUFA) establishes timeframes for FDA review of NDAs and the 2007 Food and Drug Administration Amendments Act gave the FDA authority to require implementation of a formal Risk Evaluation and Management Strategy to ensure that the benefits of a drug outweigh its risks. At the end of the review period, the FDA communicates either approval of the NDA or a complete response listing the application’s deficiencies.

Once approved, the FDA may require post-marketing studies, sometimes referred to as Phase 4 studies, to monitor the safety and effectiveness of approved drugs, and may limit further marketing of the drug based on the results of these post-marketing studies.

If regulatory approval for a drug is obtained, the clearance to market the drug will be limited to those diseases and conditions approved by FDA and for which the drug was shown to be effective, as demonstrated through clinical studies and specified in the drug’s labeling. Even if this regulatory approval is obtained, a marketed drug, its manufacturer and its manufacturing facilities are subject to continual review and periodic inspections by the FDA. The FDA ensures the quality of approved drugs by carefully monitoring manufacturers’ compliance with its current Good Manufacturing Practice (“cGMP”) regulations, which contain minimum requirements for the methods, facilities, and controls used in manufacturing, processing, and packaging of a drug. The FDA may withdraw drug approval if compliance with post-marketing regulatory standards is not maintained or if safety or quality issues are identified after the drug reaches the marketplace.

We are also subject to various laws and regulations regarding laboratory practices, the experimental use of animals and the use and disposal of hazardous or potentially hazardous substances in connection with our research. In each of these areas, as above, the FDA and other regulatory authorities have broad regulatory and enforcement powers, including the power to withdraw approvals.

Health Care Regulatory Laws

Additional laws and regulations also govern our business operations and products in the U.S., including among others:

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Certain states also mandate implementation of corporate compliance programs, require compliance with the industry’s voluntary compliance guidelines, impose restrictions on manufacturer marketing practices, require registration or licensing of manufacturers and their sales representatives, and/or require tracking and reporting of gifts, compensation, and other remuneration to healthcare professionals and entities. Some states have proposed or enacted legislation that will create new data privacy and security obligations for certain entities, such as the California Consumer Privacy Act that went into effect January 1, 2020. Violations of these laws may subject us to administrative, civil, and criminal penalties, including imprisonment of individuals, the imposition of significant fines, monetary penalties, and damages, exclusion from participation in (or reimbursement for our products from) federal health care programs like Medicare or Medicaid, imposition of compliance obligations or monitoring, curtailment or restructuring of our operations, and damage to our reputation.

Reimbursement

Ambulatory surgery centers, hospitals and physician private practices that purchase our products typically bill various third-party payors, such as government programs, private insurance plans and managed care programs, to cover all or a portion of the costs and fees associated with the therapeutics or procedures in which our products are used and bill patients for any applicable deductibles or co-payments. In the U.S., physicians are typically paid separately from the facility for surgical procedures involving our products; however, there is no published Medicare payment schedule at the national level for physician payment amounts. The physician payment rate is left to the discretion of the regional Medicare Administrative Contractors (MACs), with each MAC separately determining coverage and no assurance that coverage and adequate reimbursement will be obtained from, or maintained by, the MACs. MACs have in the past, and may in the future, change coverage terms.

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In the U.S., no uniform policy of coverage and reimbursement exists among third-party payors; coverage and reimbursement can differ significantly from payor to payor. In addition, payors continually review new products for possible coverage and existing products for changes in coverage and can, without notice, deny coverage.

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One key aspect of reimbursement in the U.S. are the distinct billing codes that are used by healthcare providers to report the provision of medical procedures and the use of supplies for specific patients to payors. There are different categories of Current Procedural Terminology (CPT) codes (Category I, II and III) based on the procedure or supply. Although we have received a permanent healthcare common procedure coding system J code for our Photrexa pharmaceutical therapies, we have only obtained temporary Category III CPT codes for the professional fees associated with CXL and iStent-related procedures. Prior to expiration, there are two options: submit an application to convert a temporary code to a permanent code or submit an application for a five-year extension of the temporary code. With the approaching expiration of our temporary Category III CPT code for the professional fees associated our iStent-related procedures, we have applied for a permanent Category I CPT code. In connection with this transition to a permanent code, both the physician fee and facility fee associated with the procedures using our iStent products will be reevaluated. In some cases, the physician fees and/or facility fees have been decreased at the time codes are transitioned from temporary to permanent. Further, even when a permanent billing code has been assigned to a product, there is no guarantee that coverage will be provided.

Regulation & Reimbursement outside the U.S.

In addition to regulations in the U.S., we are subject to a variety of regulations in other jurisdictions governing clinical trials, commercial sales and distribution of our products and reporting of payments to physicians. Whether or not we obtain FDA approval for a product, we must obtain authorization before commencing clinical trials or obtain marketing authorization or approval of a product under the comparable regulatory authorities of countries outside the

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U.S. The approval process varies from country to country and the time may be longer or shorter than that required for FDA approval. The requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary greatly from country to country. In addition, certain countries have adopted transparency legislation that requires us to report contracts with or payments made to physicians in those countries and many have enacted anti-kickback laws and regulations, which generally prohibit the offer, receipt, or payment of remuneration in exchange for or to induce the use of our products.

Similar to the trend within the U.S., other major international markets are also moving toward more stringent regulatory frameworks for medical device and drug products. For example, in May 2017, the EU adopted a new regulatory scheme for medical devices under the Medical Device Regulation (MDR). The MDR is expected to become fully effective in May 2021 and will bring significant new requirements for many medical devices, including enhanced requirements for clinical evidence and documentation, increased focus on device identification and traceability, and additional post-market surveillance and vigilance, which could result in substantial additional expense.

The EU has also adopted increasingly stringent data protection and privacy rules that have and will continue to have a substantial impact on the use of patient data across the healthcare industry. The EU General Data Protection Regulation, or GDPR, became effective in May 2018 and applies across the EU and includes, among other things, a requirement for prompt notice of data breaches to data subjects and supervisory authorities in certain circumstances and significant fines for non-compliance.

Reimbursement

Outside the U.S., reimbursement levels vary significantly by country and by region within some countries. Reimbursement is obtained from a variety of sources, including government-sponsored and private health insurance plans, and combinations of both. Some countries require additional clinical data before granting or expanding coverage and reimbursement for our products. In general, obtaining broad-based reimbursement and adequate payment for new technologies is more difficult in these markets than in the U.S. Many countries require new medical technologies to not only be safe and effective, but also to be able to demonstrate clinical benefits that outweigh the costs when compared to the standard of care. As in the U.S., reimbursement decisions can change, resulting in the elimination or reduction of reimbursement payments, which could adversely affect our financial results and our ability to invest in and grow our business.

Other

Our operations and many of the products we manufacture or sell are subject to extensive regulation by numerous other governmental agencies, both within and outside the U.S. In the U.S., apart from the agencies discussed above, our facilities, operations, employees, products (their manufacture, sale, import and export) and services are regulated by the Environmental Protection Agency, the Occupational Health & Safety Administration, the Department of Labor, Customs and Border Protection, the Department of Commerce, the Department of Treasury, the Department of Justice and others. State agencies also regulate our facilities, operations, employees, products and services within their respective states. Government agencies outside the U.S. also regulate public health, product registration, manufacturing, environmental conditions, labor, exports, imports and other aspects of our global operations.

These regulatory agencies and any current or future legislation could impact our business operations, reimbursement for our products, and the healthcare environment generally, which could adversely affect our ability to operate our business and our financial results. Compliance with these regulations has not had a material effect on our capital expenditures, earnings, or competitive position to date, but current or new legislation could have such an effect in the future. We cannot estimate the expenses we may incur to comply with potential new laws or changes to existing laws, or the other potential effects these laws may have on our business.

Human Capital Management

Glaukos is committed to developing a comprehensive, cohesive and positive employee experience. We consider talent attraction, development, engagement and retention a key driver of our business success. As of December 31, 2020, we had 653 full-time employees. Our Board of Directors, through the Compensation, Nominating and Governance

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Committee, retains direct oversight of our human capital management process, including demographics, talent development, employee retention, material aspects of employee compensation as well as diversity and inclusion recruitment, retention and compensation efforts. Additionally, the Compensation, Nominating and Governance Committee assists management with the implementation of the Company’s diversity strategy. We report on human capital matters at each regularly scheduled Board of Directors meeting and periodically throughout the year. The most significant human capital measures or objectives that we focus on in managing our business and our related human capital initiatives include the following:

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Available Information

Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed or furnished pursuant to Sections 13(a) and 15(d) of the Exchange Act, are available on our web site at www.glaukos.com, free of charge, as soon as reasonably practicable after the electronic filing of these reports with, or furnishing of these reports to, the Securities and Exchange Commission (SEC). In addition, the SEC maintains a web site at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, including us.

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Item 1A. Risk Factors

The risks discussed below are not the only ones facing our business but do represent those risks that we believe are material to us. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also harm our business. Please read the cautionary notice regarding forward-looking statements under the heading “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Risks Related to Our Business

The COVID-19 pandemic has adversely affected, and could continue to materially and adversely affect, our business, results of operations, financial condition, liquidity, and cash flows.

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In December 2019, a novel strain of coronavirus (COVID-19) emerged in Wuhan, Hubei Province, China. The World Health Organization has declared COVID-19 to be a “pandemic,” spreading across the globe and impacting worldwide economic activity. While the impacts of COVID-19 have had, and we expect them to continue to have, an adverse effect on our business, results of operations, financial condition, liquidity and cash flows, we are unable to predict the extent or nature of these impacts at this time.

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In an effort to reduce the spread of COVID-19, certain federal, state and local governmental authorities have issued, and in some cases reinstituted, stay-at-home and other orders, proclamations and/or directives. To protect our employees and adhere to the guidance and orders of these various governmental authorities, beginning in the first quarter of 2020 and continuing through the date hereof, we shifted the majority of our workforce to remote operations and implemented changes to our manufacturing and distribution operations to include the use of personal protective equipment and ensure social distancing. Further, in an effort to identify, and avoid further infection from, asymptomatic cases, we have offered periodic voluntary COVID-19 viral testing to on-site employees.

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Government restrictions and advisories on elective procedures and therapies enacted to slow the spread of COVID-19 led to a material decrease in demand for our products versus levels achieved prior to the COVID-19 outbreak, which decrease in demand was most significantly felt in the latter part of the quarter ended March 31, 2020 and the earlier part of the quarter ended June 30, 2020. Beginning in May 2020, we began to see a return toward more normalized levels for cataract and keratoconus procedures, which normalization has continued through the quarter ended December 31, 2020. However, we cannot predict the timing and full impact of the pandemic on our future financial and operating results given the continued uncertainties associated with the situation, including the possibility of future surges of COVID-19, uncertainties about the severity and transmission rates of new variants of COVID-19, the availability, distribution and efficacy of vaccines and therapeutics for COVID-19 and patient reluctance to seek primary care from optometrists and ophthalmologists or undergo medical procedures during or following the pandemic. Restrictions on elective procedures and therapies and the closures of ophthalmic practices in an effort to halt the spread of COVID-19 have also impacted the progress of our pipeline products. For example, new patient enrollment in our iDose clinical trial slowed significantly which delayed the iDose approval timeline. Any further prolonged economic slowdown or reinstitution of stay-at-home orders may cause additional delays in the progress of our pipeline products, including those in clinical trials.

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We implemented significant cost saving initiatives in order to preserve jobs globally and protect core research and development programs. However, the majority of our planned expenditures have been reinstated. We continue to carefully manage our discretionary spending, which may slow the growth trajectory of the Company or require us to delay projects that could have benefitted the Company. In addition to the cost saving measures, we issued $287.5 million in aggregate principal amount of 2.75% convertible notes due 2027 (the Convertible Notes) in June 2020, the proceeds of which are expected to be used for working capital and general corporate purposes.

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Our supply chain has experienced some delays due to COVID-19 disruptions impacting some of our suppliers and third-party partners and it is possible our suppliers or third-party partners could incur further challenges supplying the materials needed for the manufacture of our products. Additionally, we have experienced a number of COVID-19 cases among our workforce, particularly in the fourth quarter of 2020, and we could experience a wider-spread outbreak of COVID-19 in our manufacturing facilities, which could require us to temporarily shut down manufacturing operations

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and/or cause a disruption to, or shortage in, our workforce. If a widespread outbreak were to occur, we may experience delays in our responses to our customers and possible delays in shipments of our products, which could harm our customer relations and adversely impact our competitive positioning and sales. We have also experienced restrictions on the ability of our personnel to travel and access customers and clinical sites for training and support. Other potential disruptions include delays in approvals by regulatory bodies; delays in product development efforts; and further challenges to our capacity to manufacture, sell and support the use of our products.

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We have incurred significant losses since inception and our business requires substantial capital and operating expenditures to operate and grow. There can be no guarantee that we reach sustained profitability.

Since the Company’s inception in 1998, we have incurred significant operating losses. As of December 31, 2020, we had an accumulated deficit of approximately $310.1 million, principally from costs incurred in our clinical trial, research and development programs and from our general and administrative expenses. We have funded our operations to date from the sale of equity securities, including our June 2015 initial public offering (IPO), the issuance of notes payable, cash exercises of stock options and warrants to purchase equity securities, cash generated from commercial operations and the issuance of the Convertible Notes. To implement our global business strategies we need to, among other things, fund ongoing research and development activities, expand our manufacturing capabilities, grow our sales and marketing organization, enforce or defend our intellectual property rights, acquire companies or in-license products or intellectual property, and obtain regulatory clearance or approval to commercialize our existing products in international markets or to commercialize those currently under development in the U.S. and internationally. As a result, we expect our expenses to continue to increase as we pursue these objectives. While we believe we have sufficient cash to fund our operations for at least the next 12 months from the date our consolidated financial statements for the year ended December 31, 2020 are made publicly available, our ability to reach sustained profitability is highly uncertain, especially given our increasingly competitive landscape, which makes forecasting our sales more difficult.

Our success depends on our ability to continue to generate sales of our commercialized products and develop and commercialize additional products, which we may not be able to accomplish.

Our primary sales-generating commercial products have been the iStent, which we began selling in the U.S. in 2012, the iStent inject, which we began selling in the U.S. in the second half of 2018, and its successor, the iStent inject W, launched in the second half of 2020, as well as our Photrexa therapies, which we acquired in connection with our acquisition of Avedro, Inc. (Avedro) in November 2019. We expect to continue to derive a significant portion of our net sales from the iStent, the iStent inject models and the Photrexa therapies.

It is important that we continue to build a more complete product offering. Developing additional products is expensive and time-consuming. Even if we are successful in developing our additional pipeline products, including those currently in development, the success of our new product offerings is inherently uncertain and there can be no assurance that our products will produce net sales in excess of the costs of development. Any current or new products could also quickly be rendered obsolete by changing customer preferences or the introduction by our competitors of products embodying superior technologies, features or better product safety, quality or efficacy. Our competitors include large publicly traded companies or divisions of publicly traded companies and have more resources, greater name recognition, longer operating histories, more established relationships with healthcare professionals, customers and third-party payors, broader products lines that provide rebate and bundling opportunities, more established sales and marketing programs and distribution networks, and greater experience in obtaining regulatory clearance or approval. Additionally, our research programs, which are expensive and time-intensive, may initially show promise in identifying potential products, yet fail to yield product candidates for clinical development. If we are unable to successfully commercialize additional products, our business prospects would be materially affected.

As our growth strategy turns increasingly global, we are, and will continue to be, subject to a variety of risks associated with our international operations, which could adversely impact our results of operations and financial condition.

Our existing foreign operations, as well as our planned international growth, expose us to additional uncertainty and risks beyond regulatory authorization and reimbursement levels. Outside the U.S., we sell our products through

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direct sales organizations in sixteen countries and a network of third-party distribution partners in other markets. These international operations expose us and our subsidiaries and third-party distributors to a variety of risks including, without limitation, the following:

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If we experience any of these risks, our sales in non-U.S. jurisdictions may be harmed, our results of operations would suffer, and our business prospects would be negatively impacted.

If the supply and/or manufacture of our principal revenue-producing products, the iStent, the iStent inject models and our Photrexa therapies, is materially disrupted, it may adversely affect our ability to manufacture products and could reduce our gross margins and negatively affect our operating results.

Our corporate headquarters and the manufacturing operations for our iStent products are currently located in an approximately 98,000 square foot campus located in San Clemente, California. This location serves as our sole manufacturing location where we manufacture, inspect, package, release and ship nearly all of our iStent and iStent inject products. This is also the location where we currently conduct substantially all of our research and development (R&D) activities, customer and technical support, and management and administrative functions. We intend to relocate our corporate administrative headquarters, along with certain laboratory, R&D and warehouse space, to a new facility located in Aliso Viejo, California. If our San Clemente facility or our future facility in Aliso Viejo suffers a crippling event, or a force majeure event such as an earthquake, fire or flood, this could materially impact our ability to operate.

Additionally, we rely on a limited number of third-party suppliers, in some cases sole suppliers, to supply components for the iStent, the iStent inject models and our other pipeline products. If any one or more of our suppliers cease to provide us with sufficient quantities of components or drugs in a timely manner or on terms acceptable to us, we would have to seek alternative sources of supply. Because of factors such as the proprietary nature of our products, our domestic and international quality control standards and regulatory requirements including FDA’s Quality System Regulation (QSR) and Current Good Manufacturing Practices (cGMPs) regulations, we may from time to time be unable to obtain components if our component suppliers are found to be in violation of such standards and we may have difficulty quickly engaging additional or replacement suppliers for some of our critical components, which could delay

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or impact our business, including the regulatory approval timelines as has happened with iLink epi-on. If our manufacturing facilities or those of any of our component suppliers or contract facilities are found to be in violation of applicable laws and regulations or fail to adequately remediate any issues discovered during an audit, the FDA or other notified bodies could take enforcement action. Even if we are able to identify and qualify a suitable second source to replace one of our key suppliers, if necessary, that replacement supplier would not have access to our previous supplier’s proprietary processes and would therefore be required to develop its own, which could result in further delay. Despite our efforts to maintain an adequate supply of inventory, the loss of these suppliers, or their inability to provide us with an adequate supply of components or products, could cause delay in the manufacture of our products, thereby impairing our ability to meet the demand of our customers and causing significant harm to our business. Any disruption of this nature or increased expense could harm our commercialization efforts and adversely affect our operating results.

Our corneal health Photrexa therapies are produced by a small number of contract manufacturing organizations. The systems that bio-activate our Photrexa therapies are primarily manufactured in Burlington, Massachusetts. Any material disruption to the manufacture of our corneal health products, either our pharmaceuticals or their bio-activation systems, could also adversely affect our operating results and clinical efforts.

If the quality or delivery of our products does not meet our customers’ expectations, our reputation could suffer and ultimately our sales and operating earnings could be negatively impacted.

In the course of conducting our business, we have had to and must continue to adequately address quality issues associated with our products, including in our engineering, design, manufacturing and delivery processes, as well as issues in third-party components included in our products. Because our products are highly complex, the occurrence of performance issues may increase as we continue to introduce new products and as we rapidly scale up manufacturing to meet increased demand for our products. Although we have established internal procedures to minimize risks that may arise from product quality issues, there can be no assurance that we will be able to eliminate or mitigate occurrences of these issues and associated liabilities. In addition, identifying the root cause of performance or quality issues, particularly those affecting third-party components, may be difficult, which increases the time needed to address quality issues as they arise and increases the risk that similar problems could recur. Finding solutions to quality issues can be expensive and we may incur significant costs or lost revenue in connection with, for example, shipment holds, product recalls and warranty or other service obligations. In addition, quality issues can impair our relationships with new or existing customers or result in product liability suits against us, which may be expensive to defend or resolve and could impact the reimbursement coverage of our products, our product liability insurance rates and/or our cash reserves in the event our existing insurance coverage is insufficient. The occurrence of any of the foregoing could adversely affect our reputation as a producer of high quality products, which could adversely affect our business, financial condition or results of operations.

Ophthalmic surgeons may not use our products if they do not believe they are safe, efficient, effective and preferable alternatives to other treatment solutions in the market or may use our products without being adequately trained, which could result in inferior clinical outcomes.

We believe that ophthalmic surgeons will not use our products unless they conclude that our products provide a safe, efficient, effective and preferable alternative to currently available treatment options. If ophthalmic surgeons determine that any of our products are not sufficiently effective, efficient or safe, whether based on longer-term patient studies or clinical experience or unsatisfactory patient outcomes or patient injury, our sales would be harmed. Surgeons may base such determination on patient outcomes that are the result of untrained or unqualified surgeons performing procedures for which they haven’t been trained. It is also possible that as our products become more widely used, latent defects could be identified, creating negative publicity and liability problems for us and adversely affecting demand for our products. If an increasing number of ophthalmic surgeons do not continue to adopt the use of our products, our operating and financial results will be negatively impacted.

Operating results could be unpredictable and may fluctuate significantly from quarter to quarter, which could adversely affect our business, financial condition, results of operations and the trading price of our common stock.

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In addition to the impact of the COVID-19 pandemic, our net sales may experience volatility due to a number of factors, many of which are beyond our control, including, among other things, fluctuating demand, pricing pressures applicable to our products, commercialization of our new and existing products and the marketing of competitive products, results of clinical research and trials, regulatory approvals and legislative changes affecting our products, variances in the sales terms, supply chain and inventory management, timing or volume of customer orders and the length of our sales cycle, which varies and may be unpredictable. As a result, you should not rely on our results in any past period as an indication of future results and you should anticipate that fluctuations in our quarterly and annual operating results may continue and could generate volatility in the price of our common stock. We believe that quarterly comparisons of our financial results should not be relied upon as an indication of our future performance.

If we fail to manage our anticipated growth effectively, we may not be able to meet customer demand for our products and our business could suffer.

Since the commercial launch of the iStent in 2012, we have seen significant period-to-period growth in our business, both organically and through transactions, and we must continue to grow in order to meet our business and financial objectives. However, continued growth may create numerous challenges, including, among others, new and increased responsibilities for our management team; increased competition; increased product demand which could strain our manufacturing capacity; the management of an increasing number of customer, supplier and other relationships; increased pressure on our operating, financial and reporting systems; entry into new international territories with unfamiliar regulations and business approaches; and the need to hire, train and manage additional qualified personnel. If we fail to manage any of these challenges effectively, our business may be harmed.

If we are unable to retain or recruit qualified personnel for growth, our business results could suffer.

We have benefited substantially from the leadership and performance of our senior management as well as certain key employees. For example, our chief executive officer, as well as other key members of our senior management, has experience successfully developing novel technologies and scaling early-stage medical device and pharmaceutical companies to achieve profitability. We also rely on our qualified sales representatives and on consultants and advisors in our research, operations, clinical and commercial efforts to grow our business, develop and commercialize new products and implement our business strategies. Our success will depend on our ability to retain our current management, key employees and consultants and advisors, and to attract and retain qualified personnel in the future. The loss of services of these personnel, which could occur without notice and without cause or good reason, could prevent or delay our growth plans and the implementation and completion of our strategic objectives, or divert management’s attention to seeking qualified replacements. Our employees, including members of our senior management, are not subject to non-competition agreements. Accordingly, the adverse effect resulting from the loss of key personnel could be compounded by our inability to prevent them from competing with us.

We have and may continue to enter into acquisitions, collaborations, in-licensing agreements, joint ventures, alliances or partnerships with third parties that could fail.

We have and may continue to enter into acquisitions, collaborations, in-licensing agreements, joint ventures, alliances, partnerships or undertake one or more of these transactions in order to retain our competitive position within the marketplace or to expand into new markets. Examples include our acquisitions of DOSE and Avedro, as well as our licensing of Santen’s Preserflo MicroShunt and the Intratus drug delivery platform. However, we cannot assure you that we will be able to successfully complete any future acquisition we choose to pursue, or that we will be able to successfully integrate any acquired business, product or technology in a cost-effective and non-disruptive manner. Our future successes will depend, in part, on our ability to manage an expanded business, which may pose substantial challenges for our management, including challenges related to the management and monitoring of new operations and associated increased costs and complexity. There can be no assurances that we will be successful in managing such expanded business or that we will realize the expected economies of scale, synergies and other benefits currently anticipated from recent or future acquisitions or strategic transactions. In addition, if we are unable to integrate any acquired businesses, products or technologies effectively, our business will likely suffer. Additionally, some of these collaborations, joint ventures, alliances and partnerships require us to invest a substantial amount of resources. These arrangements may be terminated before we are able to realize net sales to sufficiently cover the costs associated

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therewith, which could materially impact our business. We cannot assure you that any such transaction would result in the benefits expected from the transaction, including revenue growth, increased profitability or an enhancement in our business prospects. Further, pursuing acquisitions, collaborations, in licensing agreements, joint ventures, alliances or partnerships with third parties, whether or not completed, is costly and time-consuming and could distract Company management from the operation of the business, which could negatively impact our operating results.

Failure to protect our information technology infrastructure against cyber-based attacks, network security breaches, service interruptions or data corruption could materially disrupt our operations and adversely affect our business and operating results.

The efficient operation of our business depends on our information technology systems. We rely on our information technology systems to effectively manage sales and marketing data, accounting and financial functions, inventory management, product development tasks, clinical data, customer service and technical support functions. Our information technology systems are vulnerable to damage or interruption from earthquakes, fires, floods and other natural disasters, terrorist attacks, power losses, computer system or data network failures, security breaches, data corruption and cyber-based attacks, including malicious software programs, phishing attacks or other attacks, which we have experienced and continue to monitor. In addition, a variety of our software systems are cloud-based data management applications, hosted by third-party service providers whose security and information technology systems are subject to similar risks. The failure to protect either our or our service providers’ information technology infrastructure could disrupt our entire operation or result in decreased sales, increased overhead costs, product shortages, loss or misuse of proprietary or confidential information, intellectual property or sensitive or personal information, all of which could have a material adverse effect on our reputation, business, financial condition and operating results.

Failure to comply with data privacy and security laws could have a material adverse effect on our business.

We are subject to state, federal and foreign laws relating to data privacy and security in the conduct of our business, including state breach notification laws, the Health Insurance Portability and Accountability Act (HIPAA), as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 (HITECH), the European Union’s (EU) General Data Protection Regulation (GDPR), and the California Consumer Privacy Act (CCPA). These laws affect how we collect and use data of our employees, consultants, customers and other parties. Furthermore, these laws impose substantial requirements that require the expenditure of significant funds and employee time to comply, and additional states and countries are enacting new data privacy and security laws, which will require future expansion of our compliance efforts. We also rely on third parties to host or otherwise process some of this data. In some instances, these third parties have experienced immaterial failures to protect data privacy. Any failure by a third party to prevent security breaches could have adverse consequences for us. We will need to expend additional resources and make significant investments to comply with data privacy and security laws. Our failure to comply with these laws or prevent security breaches of such data could result in significant liability under applicable laws, cause disruption to our business, harm our reputation and have a material adverse effect on our business.

We cannot be certain that our net operating loss tax carryforwards will be available to offset future taxable income.

At December 31, 2020, we had approximately $439.4 million, $297.6 million and $13.4 million of net operating loss (NOL) carryforwards for federal, state and foreign purposes, respectively, available to offset future taxable income. The federal NOL carryforwards incurred prior to 2018 begin to expire in 2021, while a federal NOL carryforward of $186.6 million will not expire. The state NOL carryforwards begin to expire in 2021. The foreign NOL carryforwards begin to expire in 2022. At December 31, 2020, we had federal and state R&D credit carryforwards of approximately $32.3 million and $15.7 million, respectively. Federal credits begin to expire in 2021, state credits of $3.4 million begin to expire in 2023, and state credits of $12.2 million carry over indefinitely. We continue to provide a valuation allowance against a portion of these tax attributes because we believe that uncertainty exists with respect to their future realization, as well as with respect to the amount of the tax attributes that will be available in future periods. Utilization of these tax attributes may be subject to annual limitations under the Internal Revenue Code of 1986 (IRC) Section 382 and Section 383 if the Company experiences an ownership change. To the extent available, we intend to use these NOL and credit carryforwards to offset future taxable income and/or income tax liabilities associated with our operations. There can be no assurance that we will generate sufficient taxable income in the carryforward period to utilize the

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remaining tax attributes before they expire.

Risks Related to Indebtedness

The requirement that we service our indebtedness could limit the cash flow available for our operations and have other consequences that could adversely affect our business, and we may not have sufficient cash flow from our business to pay our debt obligations.

As of December 31, 2020, we had $287.5 million in principal amount of indebtedness as a result of the issuance of the Convertible Notes. We may also incur additional indebtedness to meet future financing needs. Interest payments, fees, covenants and restrictions under agreements governing our current or future indebtedness, including the indenture governing the Convertible Notes, could have important consequences, including the following: impairing our ability to successfully continue to commercialize our current or future products; limiting our ability to obtain additional financing on satisfactory terms; increasing our vulnerability to general economic downturns, competition and industry conditions; requiring the dedication of a substantial portion of our cash flow from operations to service our indebtedness; inhibiting our flexibility to plan for, or react to, changes in our business; and diluting the interests of our existing stockholders as a result of issuing shares of our common stock upon conversion of the Convertible Notes. The occurrence of any one of these events could have an adverse effect on our business, financial condition, operating results or cash flows and ability to satisfy our obligations under the indenture governing the Convertible Notes and any other indebtedness.

Our ability to make scheduled payments of the principal of, to pay interest on or to refinance the amounts payable under our current or future indebtedness, including the Convertible Notes, will depend on our operating and financial performance, which may be subject to economic, financial, competitive and other factors beyond our control. Our business may not generate cash flow from operations in the future sufficient to service our debt and make necessary investments in our business, and our cash needs may increase in the future. If we are unable to generate such cash flow, we may be required to adopt one or more alternatives, such as selling assets, restructuring debt or obtaining additional debt financing or equity capital on terms that may be onerous or highly dilutive. Our ability to refinance any future indebtedness will depend on the capital markets and our financial condition at such time. We may not be able to engage in any of these activities or engage in these activities on desirable terms, which could result in a default on our debt obligations.

We may not have the ability to raise the funds necessary to settle conversions of the Convertible Notes in cash or to repurchase the Convertible Notes upon a fundamental change, and our future debt may contain limitations on our ability to pay cash upon conversion or repurchase of the Convertible Notes.

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Noteholders may require us to repurchase their Convertible Notes upon the occurrence of a fundamental change at a fundamental change repurchase price equal to 100% of the aggregate principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the fundamental change repurchase date. In addition, upon conversion of the Convertible Notes, unless we elect to deliver solely shares of our common stock to settle such conversion (other than paying cash in lieu of delivering any fractional share), we will be required to make cash payments in respect of the Convertible Notes being converted. However, we may not have enough available cash or be able to obtain financing at the time we are required to make repurchases of the Convertible Notes surrendered therefor or Convertible Notes being converted. In addition, our ability to repurchase the Convertible Notes or to pay cash upon conversions of the Convertible Notes may be limited by law, by regulatory authority and by agreements governing our future indebtedness. Our failure to repurchase Convertible Notes at a time when the repurchase is required by the indenture governing the Convertible Notes or to pay any cash payable on future conversions of the Convertible Notes as required by the indenture governing the Convertible Notes would constitute a default under the indenture governing the Convertible Notes. A default under the indenture governing the Convertible Notes or the occurrence of the fundamental change itself may lead to a default under any future credit facility or other agreements governing our future indebtedness. If the repayment of the related indebtedness were to be accelerated after any applicable notice or grace periods, we may not have sufficient funds to repay the indebtedness and repurchase the Convertible Notes or make cash payments upon conversions thereof.

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The conditional conversion feature of the Convertible Notes, if triggered, may adversely affect our financial condition and operating results.

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In the event the conditional conversion feature of the Convertible Notes is triggered, holders of the Convertible Notes will be entitled to convert the Convertible Notes at any time during specified periods at their option. If one or more holders elect to convert their Convertible Notes, unless we elect to satisfy our conversion obligation by delivering solely shares of our common stock (other than paying cash in lieu of delivering any fractional share), we would be required to settle a portion or all of our conversion obligation through the payment of cash, which could adversely affect our liquidity. In addition, even if holders of the Convertible Notes do not elect to convert their Convertible Notes, we could be required under applicable accounting rules to reclassify all or a portion of the outstanding principal of the Convertible Notes as a current rather than long-term liability, which would result in a material reduction of our net working capital.

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The capped call transactions may affect the value of our common stock.

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In connection with the issuance of the Convertible Notes, we entered into capped call transactions with certain option counterparties. The capped call transactions cover, subject to customary adjustments, the number of shares of common stock initially underlying the Convertible Notes. The capped call transactions are expected generally to reduce the potential dilution of our common stock upon any conversion of the Convertible Notes or at our election (subject to certain conditions) and offset any cash payments we are required to make in excess of the aggregate principal amount of converted Convertible Notes, as the case may be, with such reduction or offset subject to a cap.

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We have been advised that, in connection with establishing their initial hedges of the capped call transactions, the option counterparties or their respective affiliates purchased shares of our common stock and/or entered into various derivative transactions with respect to our common stock concurrently with or shortly after the pricing of the Convertible Notes. In addition, the option counterparties or their respective affiliates may modify their hedge positions by entering into or unwinding various derivatives with respect to our common stock and/or purchasing or selling our common stock or other securities of ours in secondary market transactions prior to the maturity of the Convertible Notes (and are likely to do so on each exercise date of the capped call transactions, which are expected to occur during the 40 trading day period beginning on the 41st scheduled trading day prior to the maturity date of the Convertible Notes, or following any termination of any portion of the capped call transactions in connection with any repurchase, redemption or early conversion of the Convertible Notes). This activity could cause or avoid an increase or a decrease in the market price of our common stock.

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We are subject to counterparty risk with respect to the capped call transactions.

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The option counterparties to the capped call transactions are financial institutions, and we are subject to the risk that any or all of them might default under the capped call transactions. Our exposure to the credit risk of the option counterparties is not secured by any collateral. Past global economic conditions have resulted in the actual or perceived failure or financial difficulties of many financial institutions. If an option 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 the capped call transactions with such option counterparty. Our exposure will depend on many factors but, generally, an increase in our exposure will be correlated to an increase in the market price subject to the cap and in the volatility of our common stock.

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In addition, upon a default by an option counterparty, we may suffer 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 the option counterparties.

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Risks Related to the Regulatory Environment

Our business, products and processes are subject to extensive regulation both in the U.S. and abroad and it can be costly to comply with these regulations. Any failure to adhere to applicable regulations could harm our business, financial condition and operating results.

Our medical devices, drugs, drug/device combination products or other products are subject to extensive government regulation in the U.S. by the U.S. Food and Drug Administration (FDA), state regulatory authorities and foreign regulatory authorities in the countries in which we conduct business. These regulations relate to, among other things, research and development, design, testing, clinical trials, manufacturing, clearance or approval, environmental controls, safety and efficacy, labeling, advertising, promotion, pricing, recordkeeping, reporting, import and export, post-approval studies and the sale and distribution of our products. See Item 1, Business, “Government Regulation -- Regulation & Reimbursement in the U.S.” and “Regulation & Reimbursement outside the U.S.” for additional information.

The process of obtaining clearances or approvals to market our products can be expensive and lengthy, and we cannot guarantee that our current products will receive approval for additional indications or that our future products will receive clearance or approval on a timely basis, if at all. Before we can obtain regulatory approval for any product candidate, we may be required to undertake extensive clinical testing in humans to demonstrate safety and efficacy to the satisfaction of the FDA and other regulatory agencies, including outside the U.S. We have experienced in the past, and could experience in the future, delays in the commencement or completion of clinical trials or testing that could significantly affect our product development costs. We do not know whether planned clinical trials will begin on time, need to be redesigned, enroll an adequate number of patients in a timely manner or be completed on schedule, if at all. Conducting clinical trials is a complex and expensive process, can take many years, and outcomes are inherently uncertain. We incur substantial expense for, and devote significant time to, clinical trials but cannot be certain that the trials will ever result in commercial sales, even if we believe the results from such trials are positive. We may suffer significant setbacks in clinical trials, even after earlier clinical trials showed promising results, and failure can occur at any time during the clinical trial process. Any of our medical device products may malfunction and any of our products may produce undesirable adverse effects that could cause us or regulatory authorities to interrupt, delay or halt clinical trials. We, the clinical trial investigators, the independent review board responsible for overseeing the trial, the FDA, or another regulatory authority may suspend or terminate clinical trials at any time due to a number of factors, including failure to conduct the clinical trial in accordance with applicable regulatory requirements or trial protocols, failure to demonstrate a benefit from using the product, lack of sufficient funding, or to avoid exposing trial participants to unacceptable health risks. Any delay or failure in clinical trials would delay or prevent our ability to obtain necessary regulatory approvals, which would have a material adverse effect on our business, financial condition and prospects.

In some instances, we may pursue a regulatory clearance or approval pathway that proves unsuccessful, which would substantially increase the time and financial resources required to obtain FDA or other regulatory approval or could result in new competitive products reaching the market faster than our product candidate, which could materially adversely impact our competitive position and prospects. We cannot assure you that we will receive the requisite or timely approvals for commercialization of our product candidates.

Even after we have obtained the proper regulatory clearance or approval to market a product, we have ongoing responsibilities under FDA regulations and applicable foreign laws and regulations. We may also be required to seek additional regulatory approvals to modify our approved products or their manufacturing processes, which may entail significant time and expense. We and our suppliers are subject to extensive post-marketing regulatory requirements and failure to comply with applicable requirements could subject us to enforcement actions, including product approval withdrawals. Compliance with applicable regulatory requirements is subject to continual review and is monitored rigorously through periodic inspections by the FDA. Other post-market requirements that may regulate our products include establishment registration and device listing, quality system and good manufacturing requirements, reporting of adverse events and device malfunctions, reporting of corrections and removals (recalls), labeling requirements, and promotional restrictions. Our products could malfunction, cause unexpected adverse events, or experience performance problems that require review and possible corrective action by us or a component supplier, including a recall or market withdrawal. Failure to conduct any required post-marketing studies for our approved products in a timely manner could result in the revocation of the approval for the product that is subject to such a requirement and could also result in the

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recall or withdrawal of the product. Any recall or product withdrawal, whether required by the FDA or another regulatory authority or initiated by us, could harm our reputation with customers and negatively affect our sales.

The FDA, state and foreign regulatory authorities have broad enforcement powers. Our failure to comply with applicable regulatory requirements could result in enforcement action by the FDA, state or foreign regulatory authorities, which may include, among other things, warning letters, fines, injunctions, recalls, refusals to grant or delays in granting requests, civil fines and penalties, operating restrictions, withdrawal of approvals and even criminal prosecution.

In addition, our promotional materials and training methods must comply with FDA and other applicable laws and regulations, including the prohibition of the promotion of a drug or medical device for a use that has not been cleared or approved by the FDA, also known as an “off-label” use. Physicians may use our products off-label, as the FDA does not restrict or regulate a physician's choice of treatment within the practice of medicine. However, if the FDA determines that our promotional materials or training constitutes promotion of an off-label use, it could request that we modify our training or promotional materials or subject us to regulatory or enforcement actions.

We are subject to healthcare fraud and abuse, anti-kickback, false claims and transparency laws and regulations, among others, which are enforced by federal and state governments with respect to our marketing, training, customer arrangements, financial arrangements with physicians, patient assistance programs, reimbursement support services, and other practices. See Item 1, Business, “Government Regulation -- Regulation & Reimbursement in the U.S.” and “Regulation & Reimbursement outside the U.S.” for additional information about the laws and regulations which apply to us. In the foreign markets in which we operate, different pricing and reimbursement systems, which could result in lower reimbursement, could harm our ability to operate our business.

The scope and enforcement of each of the laws applicable to our business and products is uncertain and subject to rapid change in the current environment of healthcare reform. If our operations are found to be in violation of any of the government regulations that apply to us, we may be subject to penalties, including civil and criminal penalties, damages, fines, disgorgement, imprisonment, exclusion from participation in federal and state healthcare programs and the curtailment or restricting of our operations, any of which could harm our ability to operate our business and our financial results. The U.S. Department of Justice has increased its scrutiny of interactions between manufacturers and healthcare providers, as well as various patient and product support programs, which has led to a number of investigations, prosecutions, convictions and settlements in the healthcare industry. We have built and maintained a compliance program to adhere to the various compliance and reporting requirements in multiple jurisdictions, but these laws and regulations are subject to evolving interpretation. Although we try to structure our arrangements within available safe harbors whenever possible, we may nevertheless become subject to government scrutiny or investigation. Responding to a government investigation is time and resource intensive, and may cause harm to our business and reputation even if we are able to successfully defend against it. Additionally, resolution of any such investigation may require agreement to onerous corporate integrity agreements or other compliance or reporting requirements, which may negatively affect our business.

Legislative or regulatory reform of the healthcare system could hinder or prevent our products’ commercial success.

In the U.S. and in certain foreign jurisdictions, there have been a number of legislative and regulatory proposals to change the healthcare systems in ways that could impact our ability to sell our products profitably, if at all. In the U.S. in recent years, new legislation has been proposed and adopted at the federal and state levels that is effecting major changes in the healthcare system. In addition, new regulations and interpretations of existing healthcare statutes and regulations are frequently adopted and we may not be able to comply with the changed laws, they could increase the cost of manufacturing, marketing or selling our product, could make approvals of pipeline products more difficult or prevent us from selling at all. We expect there will continue to be a number of legislative and regulatory changes to the U.S. health care system that could significantly change the statutory provisions governing the regulatory approval, manufacture and marketing of regulated products or the reimbursement thereof and may impose additional costs or lengthen review times of planned or future products. . It is also difficult to predict whether and how the policies and priorities of a new administration could materially impact the regulation governing our products.

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We may from time to time increase the prices of our products, as was recently done with our Photrexa therapies. Drug pricing by pharmaceutical manufacturers is currently, and is expected to continue to be, under close scrutiny, including with respect to manufacturers that increase the price of products after acquiring those products from other companies. In some cases, such scrutiny has resulted in several recent congressional inquiries and proposed and enacted federal and state legislation designed to, among other things, bring more transparency to product pricing, review the relationship between pricing and manufacturers’ patient support programs, and reform government program reimbursement methodologies for products. Although our price increases have been based upon third party studies of the projected economic value of our products to the healthcare system, we cannot be certain they would not be subject to such scrutiny.

In May 2017, the EU adopted Medical Devices Regulation 2017/745 (MDR), which will repeal and replace the Medical Device Directive (MDD). MDR was set to take effect beginning May 26, 2020; however, the effective date of MDR has been postponed a year and is now anticipated to take effect beginning May 26, 2021. Although MDR does not set out a substantially different regulatory system, it provides for stricter controls of medical devices. Under provisions that govern the transition period until MDR takes effect, medical devices with notified body certificates issued under the MDD prior to May 26, 2020 may continue to be marketed and sold as long as those certificates are valid, until May 27, 2024 at the latest. After the expiration of any applicable transitional period, only devices that have been CE marked under MDR may be placed on the market in the EU.

Broader legislative changes may also impact our operations. The United Kingdom (U.K.) held a referendum on June 23, 2016 in which voters approved withdrawal from the EU (commonly referred to as Brexit). On January 31, 2020, the U.K. withdrew from the EU and the transition period ended on December 31, 2020. The U.K. and EU reached agreement regarding their future relationship on December 24, 2020. As a result of Brexit, there may be greater restrictions on imports and exports into and out of the U.K. and EU countries and regulatory complexities that could adversely impact the Company.

If, as a result of legislative or regulatory healthcare reform, we cannot sell our products profitably, whether due to our own inability to comply with, or the inability of other economic operators in our supply chain to qualify under, any legislative reform, our business would be harmed. In addition, any change in the laws or regulations that govern the clearance and approval processes relating to our current and future products could make it more difficult and costly to obtain clearance or approval for new products, or to produce, market and distribute existing products.

Changes to the reimbursement rates for our products may adversely impact our business.

Our ability to successfully commercialize and achieve market acceptance of our products depends in significant part on adequate financial coverage and reimbursement from third party payors, including governmental payors (such as the Medicare and Medicaid programs in the U.S.), managed care organizations and private health insurers. See Item 1, Business, “Government Regulation -- Regulation & Reimbursement in the U.S.” and “Regulation & Reimbursement outside the U.S.” for additional information. Payors continually review the clinical evidence for new technologies and can change their coverage policies without notice or deny payment if the product was not used in accordance with the payor’s coverage policy. Therefore, coverage for our products can differ significantly from payor to payor. In addition, payors continually review new technologies for possible coverage and can, without notice, deny coverage for these products and procedures. As a result, the coverage determination process is often time-consuming and costly and requires us to provide scientific and clinical support for the use of our products to each payor separately, with no assurance that coverage will be obtained or will be maintained once it is obtained.

In addition to uncertainties surrounding coverage policies, there are periodic changes to reimbursement levels. Without sufficient reimbursement from governmental programs or third party commercial payors, patients may not be able to access our products. The demand for, and the profitability of, our products could be materially harmed if the Medicaid program, Medicare program, other healthcare programs in the U.S. or elsewhere, or third party commercial payors in the U.S. or elsewhere deny reimbursement for our products, limit the indications for which our products will be reimbursed, or provide reimbursement only on unfavorable terms. Further, as we seek to transition the procedures associated with our iStent-related products from a temporary Current Procedural Terminology (CPT) Category III code to a permanent CPT Category I code, the physician and facility reimbursement levels associated with the procedures

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using our iStent products could be decreased. Further, even when a permanent billing code has been assigned to a product, there is no guarantee that coverage will be provided. MACs have in the past, and may in the future, change coverage terms, which could result in inadequate reimbursement and impact the use of our products. If we are unable to maintain our existing codes or obtain new permanent codes for procedures using our products, or obtain new reimbursement codes for our other products in development, we may be subject to significant pricing pressure, which could harm our business, results of operations, financial condition and prospects.

We cannot predict to what extent the evolving effects of the COVID-19 pandemic may disrupt global healthcare systems and access to our products or result in a widespread loss of individual health insurance coverage due to unemployment, a shift from commercial payor coverage to government payor coverage, or an increase in demand for patient assistance and/or free drug programs, any of which could adversely affect net revenue. In addition, payers consistently engage in cost containment efforts, which could include efforts to decrease reimbursement levels for prescription drugs and the imposition of prior authorization for the use of our products. We cannot predict actions that third party payors may take, or whether they will limit the access and level of reimbursement for our products or refuse to provide any approvals or coverage.

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Risks Related to Our Intellectual Property

If we are unable to adequately protect our intellectual property, our competitors and other third parties could develop and commercialize products similar or identical to ours, which would substantially impair our ability to compete.

Our success and ability to compete depends significantly upon our ability to obtain, maintain and protect our proprietary rights and licensed intellectual property rights to the technologies and inventions used in or embodied by our products. We rely on a combination of patents and trademark rights, and to a lesser extent on trade secrets and copyrights, together with licenses and nondisclosure agreements to protect our technologies. These legal means, however, afford only limited protection and may not adequately protect our business. We also have not pursued or maintained, and may not pursue or maintain in the future, patent protection for our products in every country or territory in which we sell or will in the future sell our products. In addition, we cannot be sure that any of our pending patent applications or pending trademark applications will issue or that, if issued, they will issue in a form that will be advantageous to us.

Despite our efforts to protect our proprietary rights, we cannot guarantee that we will be able to adequately protect these rights, which could substantially impair our ability to compete. Our patents may be challenged and held invalid or we may be unable to extend the protection on products with expiring patents. Moreover, our competitors may independently develop equivalent knowledge, methods and know-how. Competitors could purchase our products and attempt to replicate some or all of the competitive advantages we derive from our development efforts, infringe our intellectual property rights, design around our protected technology or develop their own competitive technologies that fall outside of our intellectual property rights. Further, although it is our policy to require each of our employees, consultants and any other parties who may be involved in the development of intellectual property on our behalf to execute proprietary information and inventions agreements, we may be unsuccessful in doing so with each party who in fact develops intellectual property that we regard as our own. The relevant assignment provisions may not be self-executing or may be breached, resulting in ownership disputes and/or litigation.

We have a number of foreign patents and patent applications, and expect to pursue patent protection in the most significant markets in which we do business. The laws of other countries in which our product offerings are or may be sold may not protect our product offerings and intellectual property to the same extent as U.S. laws, if at all. Many companies have encountered significant difficulties in obtaining, protecting and defending such rights in international markets. In addition, many countries limit the enforceability of patents against other parties, including government agencies or government contractors. In these countries, the patent owner may have limited remedies, and certain countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to other parties. We also may be unable to protect our rights in trade secrets and unpatented proprietary technology in these countries. If we encounter such difficulties or we are otherwise precluded from effectively protecting our intellectual property rights in these jurisdictions, our business, financial condition and results of operations could be substantially harmed.

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We may not be able to accurately estimate or control our future operating expenses in relation to obtaining, enforcing and/or defending intellectual property, which could lead to cash shortfalls. Our operating expenses may fluctuate significantly in the future as a result of the costs of preparing, filing, prosecuting, defending and enforcing patent claims and other patent related costs, including litigation costs and the results of such litigation or costs associated with administrative proceedings and the results of such proceedings.

We have been and may in the future become involved in patent and other intellectual property litigation or administrative proceedings relating to our intellectual property rights, which could be costly, time consuming and unsuccessful and could interfere with our ability to successfully commercialize our products.

Intellectual property rights are essential to our business. We have asserted and may in the future need to assert claims of infringement against third parties to protect our rights, or to invalidate or challenge the intellectual property rights of a third party, including those rights owned by our competitors. Additionally, third parties could assert infringement or misappropriation claims against us with respect to our current or future commercial products and seek to invalidate one or more of our patents or trademarks. Intellectual property disputes often involve complex legal and factual questions, and could result in significant costs, substantial damages and our inability to manufacture, market or sell our existing or future products that are found to infringe. Even if we were to prevail in any such action, the litigation or administrative proceeding could result in substantial cost and diversion of resources that could materially and adversely affect our business. Such claims could arise in situations where certain employees, consultants or contractors were previous, or are currently, employed by other medical device, biotechnology or pharmaceutical companies, including our competitors or potential competitors. Although we try to ensure that our employees and consultants do not use the intellectual property, proprietary information, know-how or trade secrets of others in their work for us, we may be subject to claims that we or these individuals have, inadvertently or otherwise, misappropriated the intellectual property or disclosed the alleged trade secrets or other proprietary information, of these former employers or competitors.

There is no guarantee that we would be successful enforcing or defending our intellectual property rights in court. A court could hold that some or all of our asserted intellectual property rights are not infringed, or could invalidate our rights, hold our rights unenforceable, or substantially narrow the scope of protection. Further, we could be prohibited from selling our products or a court could order us to pay compensatory damages as well as other penalties and fines. Any such adverse result would undermine our competitive position. Regardless of the final outcome, any litigation to enforce our intellectual property rights in patents, copyrights, trade secrets or trademarks is highly unpredictable and could result in substantial costs and diversion of resources, which could have a material adverse effect on our business, financial condition and results of operations.

Risks Related to Being a Public Company and Our Common Stock

Risks generally associated with a company-wide implementation of an enterprise resource planning (ERP) system may adversely affect our business and results of operations or the effectiveness of our internal controls over financial reporting.

On May 6, 2020, we implemented a company-wide ERP system to upgrade certain existing business, operational, and financial processes, and continue to refine the system on an ongoing basis, which has been a complex and time-consuming project. This project has required and may continue to require investment of capital and human resources, the re-engineering of processes of our business, and the attention of many employees who would otherwise be focused on other aspects of our business. Any deficiencies in the design and implementation of the new ERP system could result in higher costs than we had anticipated and could adversely affect our ability to develop and launch solutions, provide services, fulfill contractual obligations, file reports with the SEC in a timely manner, operate our business or otherwise affect our controls environment. Any of these consequences could have an adverse effect on our results of operations and financial condition. In addition, because the ERP is a new system and we have no prior experience with it, there is an increased risk that one or more of our internal financial controls may fail, which could severely inhibit our ability to accurately report our financial condition, results of operations or cash flows. If our independent registered public accounting firm determines that we have a material weakness in our internal control over financial reporting, we could lose investor confidence in the accuracy and completeness of our financial reports, the

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market price of our common stock could decline, and we could be subject to sanctions or investigations by the New York Stock Exchange, the SEC, or other regulatory authorities. Failure to remedy any material weakness in our internal control over financial reporting, or to implement or maintain other effective control systems required of public companies, could also restrict our future access to the capital markets.

Anti-takeover provisions in our charter documents and under Delaware law could make an acquisition of us, which may be beneficial to our stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management and limit the market price of our common stock.

Provisions in our restated certificate of incorporation and amended and restated bylaws may have the effect of delaying or preventing a change of control or changes in our management. Our restated certificate of incorporation and amended and restated bylaws include provisions that:

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These provisions may frustrate or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for stockholders to replace members of our board of directors, which is responsible for appointing the members of our management. In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which limits the ability of stockholders owning in excess of 15% of our outstanding voting stock to merge or combine with us.

The exclusive forum provisions in our organizational documents could limit our stockholders' ability to bring a claim in a judicial forum that it finds favorable for disputes with the Company or its directors, officers or other employees.

Our Restated Certificate of Incorporation (the “Glaukos Charter”) and our Bylaws provide that, unless the Company consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware is the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Company, (ii) any action or proceeding asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Company or its stockholders, (iii) any action or proceeding asserting a claim arising pursuant to any provision of the Delaware General Corporation Law, the Glaukos Charter or our bylaws, or (iv) any action or proceeding asserting a claim governed by the internal affairs doctrine (the “Delaware Exclusive Forum Provision”). Further, in November 2020, we amended our Bylaws to provide that the federal district courts of the United States of America will, to the fullest extent permitted by law, be the exclusive forum for resolving any complaint asserting a cause of action under the Securities Act (the “Federal Forum Provision”). Our decision to adopt the Federal Forum Provision followed a decision by the Supreme Court of the State of Delaware holding that such provisions are facially valid under Delaware law and means that suits brought by stockholders to enforce any duty or liability created under the Securities Act must be brought in federal court and cannot be brought in state court.

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The Delaware Exclusive Forum Provision is intended to apply to claims arising under Delaware state law and would not apply to claims brought pursuant to the Exchange Act or the Securities Act, or any other claim for which the federal courts have exclusive jurisdiction. In addition, the Federal Forum Provision is intended to apply to claims arising under the Securities Act and would not apply to claims brought pursuant to the Exchange Act. The exclusive forum provisions in the Glaukos Charter and our Bylaws will not relieve us of our duties to comply with the federal securities laws and the rules and regulations thereunder and, accordingly, actions by our stockholders to enforce any duty or liability created by the Exchange Act or the rules and regulations thereunder must be brought in federal courts. Our stockholders will not be deemed to have waived our compliance with these laws, rules and regulations.

The exclusive forum provisions in the Glaukos Charter and our Bylaws may limit a stockholder's ability to bring a claim in a judicial forum of its choosing for disputes with the company or its directors, officers or other employees, which may discourage lawsuits against the Company and its directors, officers and other employees. In addition, stockholders who do bring a claim in the Court of Chancery of the State of Delaware pursuant to the Delaware Exclusive Forum Provision could face additional litigation costs in pursuing any such claim, particularly if they do not reside in or near Delaware. The court in the designated forum under our exclusive forum provisions may also reach different judgments or results than would other courts, including courts where a stockholder would otherwise choose to bring the action, and such judgments or results may be more favorable to the Company than to our stockholders. Further, the enforceability of similar exclusive forum provisions in other companies’ organizational documents has been challenged in legal proceedings, and it is possible that a court could find any of our exclusive forum provisions to be inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings. If a court were to find all or any part of our exclusive forum provisions to be inapplicable or unenforceable in an action, we might incur additional costs associated with resolving such action in other jurisdictions.

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ITEM 1B.UNRESOLVED STAFF COMMENTS

None.

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ITEM 2.PROPERTIES

The Company leases two adjacent facilities located in San Clemente, California. Each of these leases expires on May 31, 2030, and each contains an option to extend the lease for one additional five year period at market rates. The total leased square footage of both facilities equals approximately 98,000. On November 14, 2018, the Company entered into an office building lease pursuant to which the Company will lease one property containing three existing office buildings, comprising approximately 160,000 rentable square feet of space, located in Aliso Viejo, California (Aliso Facility) which was accounted for as a finance lease. The term of the Aliso Facility commenced on April 1, 2019 and continues for thirteen years. The agreement contains an option to extend the lease for two additional five year periods at market rates. On December 18, 2018, we also purchased approximately 2.5 acres of vacant land located adjacent to the Aliso Facility for future expansion purposes. The Company currently intends to relocate its corporate administrative headquarters, along with certain laboratory, research and development and warehouse space, to the Aliso Facility. The Company’s San Clemente locations will continue to serve as its main manufacturing locations for the foreseeable future.

Additionally, we lease approximately 27,000 square feet of office and laboratory space in Waltham, Massachusetts, pursuant to a lease agreement that expires in 2023. We also currently occupy approximately 19,000 square feet of leased manufacturing space in Burlington, Massachusetts pursuant to a lease agreement that expires in 2023. Our additional U.S.-based and foreign subsidiaries’ leased office space, which includes small administrative offices in Germany, Australia, Canada, Brazil, Ireland, Japan and the United Kingdom, totals less than 14,000 square feet.

We believe our existing properties are well maintained, in good operating condition and are adequate to support our present level of operations.

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ITEM 3.LEGAL PROCEEDINGS

For a description of our legal proceedings, see “Patent Litigation” and “Securities Litigation” in Note 13, Commitments and Contingencies, of our notes to consolidated financial statements included in Part II, Item 8 of this Annual Report on Form 10-K, which is incorporated by reference in response to this item.

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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 for Common Stock

Our common stock trades on the New York Stock Exchange (NYSE) under the symbol “GKOS”.

As of February 25, 2021, we had 65 holders of record of our common stock. The actual number of stockholders is greater than this number of record holders, and includes stockholders who are beneficial owners but whose shares are held in street name by brokers and other nominees. The number of record holders also does not include stockholders whose shares may be held in trust by other entities.

Stock Performance Graph

The following performance graph shows the cumulative total stockholder return during the last five years in (i) our common stock, (ii) the S&P Small Cap 600 index and (iii) the S&P Small Cap 600 Healthcare index. The graph assumes that $100 was invested at the closing price of our common stock on the last trading day of fiscal year 2015 and all dividends were reinvested. Stockholder returns over the indicated period should not be considered indicative of future stockholder returns.

This performance graph shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities under that section and shall not be deemed to be incorporated by reference into any of our filings under the Securities Act or the Exchange Act.

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Dividend Policy

We have never declared or paid any cash dividends on our common stock or any other securities. We anticipate that we will retain all available funds and any future earnings, if any, for use in the operation of our business and do not anticipate paying cash dividends in the foreseeable future.

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ITEM 6.SELECTED FINANCIAL DATA

The selected consolidated financial information set forth below for each of the years ended December 31, 2020, December 31, 2019, December 31, 2018, December 31, 2017, and December 31, 2016 has been derived from our audited consolidated financial statements. The information below should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the audited consolidated financial statements and notes thereto included in Items 7 and 8, respectively, of this Annual Report on Form 10-K.

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ITEM 7.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

You should read the following discussion and analysis of our financial condition and results of operations together with “Selected Financial Data” and our audited consolidated financial statements and related notes included in Items 6 and 8, respectively, of this Annual Report on Form 10-K. This discussion and analysis and other parts of this Annual Report on Form 10-K contain forward-looking statements that reflect our current plans, expectations, estimates and beliefs that involve risks, uncertainties and assumptions, such as statements regarding our plans, objectives, expectations, intentions and projections. Our actual results and the timing of selected events may differ materially from those discussed in these forward-looking statements. You should carefully read Item 1A - “Risk Factors” included in this Annual Report on Form 10-K to gain an understanding of the important factors that could cause actual results to differ materially from our forward-looking statements. Please also see the section entitled “Special Note Regarding Forward-Looking Statements and Industry Data.”

Overview

We are an ophthalmic medical technology and pharmaceutical company focused on developing novel therapies for the treatment of glaucoma, corneal disorders, and retinal disease. We developed Micro-Invasive Glaucoma Surgery (MIGS) to serve as an alternative to the traditional glaucoma treatment paradigm and launched our first MIGS device commercially in 2012. We have also developed a proprietary bio-activated pharmaceutical therapy for the treatment of a corneal disorder, keratoconus, that was approved by the U.S. Food and Drug Administration (FDA) in 2016 and we are developing a pipeline of surgical devices, sustained pharmaceutical therapies, and implantable biosensors intended to treat glaucoma progression, corneal disorders such as keratoconus, dry eye and refractive vision correction, and retinal diseases such as neovascular age-related macular degeneration and diabetic macular edema.

Impact of COVID-19 Pandemic and Current Economic Environment

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In December 2019, a novel strain of coronavirus (COVID-19) emerged in Wuhan, Hubei Province, China. The World Health Organization declared COVID-19 to be a “pandemic,” spreading across the globe and impacting worldwide economic activity. In the U.S., certain federal, state and local governmental authorities issued stay-at-home and other orders, proclamations and/or directives, including restrictions on elective procedures and therapies, aimed at minimizing the spread of COVID-19. Although some of these governmental restrictions have since been lifted or scaled back, recent surges of COVID-19 have in some cases led, and future surges could lead, to the reinstitution of stay-at-home or other orders and may further result in restrictions being re-implemented in response to efforts to reduce the spread of COVID-19. Even if stay-at-home or other orders are removed, potential patients may elect to stay at home voluntarily. The COVID-19 pandemic and subsequent economic slowdown has materially impacted the global demand for our products, which are used in procedures and therapies that are considered elective. This decrease in demand was most significantly felt in the latter part of the quarter ended March 31, 2020 and the earlier part of the quarter ended June 30, 2020. Beginning in May 2020, we began to see an early recovery toward more normalized levels for cataract and keratoconus procedures, a trend that continued through the quarter ended December 31, 2020. The ultimate impact of the COVID-19 pandemic on our operations going forward is unknown and will depend on future developments which are highly uncertain and cannot be predicted with confidence, including the duration and severity of the COVID-19 outbreak, the status of health and safety actions taken to contain its spread, the severity and transmission rates of new variants of COVID-19, the availability, distribution, and efficacy of vaccines for COVID-19, any additional preventative and protective actions that governments, or we, may take, any future surges of COVID-19 that may occur, the dynamics associated with the rollout of the COVID-19 vaccines, and how quickly and to what extent economic and operating conditions normalize within the markets in which we operate. For additional information, see the section titled Risks Related to Our Business within Item 1A. Risk Factors of this Annual Report on Form 10-K.

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We also continue to actively assess the impact of COVID-19 on our clinical trials and other pipeline products. The closure of ophthalmic practices and deferral of elective procedures beginning in the first quarter of 2020 in response to COVID-19 disrupted new patient enrollment in our ongoing clinical trials. This disruption has continued even as facilities have reopened as doctors prioritize their standard procedures over clinical trial enrollment. In particular, patient enrollment for our iDose clinical trials remains impacted, which has delayed our estimated iDose approval timeline, where we now expect a potential FDA approval of this product in 2023.

We have taken a number of steps aimed at minimizing the spread of COVID-19 and protecting our employees, including shifting the majority of our workforce to remote operations, which continues through the date hereof. We have maintained streamlined manufacturing and assembly processes in order to consistently provide product to our customers who depend on us. In addition to other health and safety protocols that follow applicable guidance and regulations, employees involved in such operation-critical processes have been organized into a number of small shifts designed to minimize the time any one individual is required to be onsite. Further, in an effort to identify, and avoid further infection from, asymptomatic cases, we have offered periodic voluntary COVID-19 viral testing to on-site employees.

We have also sought to preserve our cash position by instituting a number of cost saving initiatives, including temporary reductions in discretionary spending and capital expenditures. These actions were designed to preserve jobs and core research and development programs. We also temporarily deferred a significant portion of our planned 2020 capital expenditures, particularly those related to facilities expansion and consolidation plans, although we have started to reinstitute our plans to move forward with the planned capital expenditures as state and local governments began to authorize re-openings. Further, in June 2020, we issued an aggregate principal amount of $287.5 million of 2.75% convertible notes due 2027 (the Convertible Notes), the net proceeds of which will be used for working capital and general corporate purposes. As of December 31, 2020, we had cash, cash equivalents, short-term investments, and restricted cash of approximately $413.9 million, compared to $183.3 million as of December 31, 2019.

On March 27, 2020, the United States enacted the Coronavirus Aid Relief, and Economic Security Act (CARES Act), an emergency economic stimulus package that includes spending and tax relief measures to strengthen the U.S. economy and help fund a nationwide effort to curtail the effects of the COVID-19 pandemic. Some of the more significant provisions which impact the Company include the employee retention credit and payroll tax deferral. We do not expect recent IRS guidance or the CARES Act to have a material impact on our results of operation. For additional information, see the section titled Notes to Consolidated Financial Statements, Note 11, Income Taxes.

Financial Overview

Our net sales were $225.0 million for the year ended December 31, 2020, which was a decrease of $12.0 million from the year ended December 31, 2019. Net sales for the years ended December 31, 2019 and December 31, 2018 were $237.0 million and $181.3 million, respectively. We incurred net losses of $120.3 million for the year ended December 31, 2020, achieved net income of $15.4 million for the year ended December 31, 2019 and we incurred a net loss of $13.0 million for the year ended December 31, 2018. The COVID-19 pandemic and measures intended to reduce its spread had a material impact on our net sales for the year ended December 31, 2020.

As of December 31, 2020, we had an accumulated deficit of $310.1 million.

Material Changes and Transactions

Convertible Senior Notes

In June 2020, we issued $287.5 million in aggregate principal amount of 2.75% Convertible Senior Notes due in 2027 (Convertible Notes) pursuant to an indenture, dated June 11, 2020, between us and Wells Fargo Bank, National Association, as trustee, in a private offering to qualified institutional buyers in accordance with Rule 144A under the Securities Act of 1933, as amended. The Convertible Notes are senior unsecured obligations of ours and bear interest at a rate of 2.75% per year, payable semi-annually in arrears on June 15 and December 15 of each year, beginning on December 15, 2020. The Convertible Notes will mature on June 15, 2027, unless earlier converted, redeemed or

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repurchased in accordance with their terms. In connection with issuing the Convertible Notes, we received $242.2 million in proceeds, after deducting fees and offering expenses and paying the cost of certain capped call transactions. These proceeds will be used for working capital and general corporate purposes.

For additional information, see Note 9, Convertible Senior Notes to the consolidated financial statements in Item 8 of this Annual Report on Form 10-K.

Acquisition of Avedro, Inc.

On November 21, 2019, we acquired Avedro, Inc. (Avedro), a hybrid ophthalmic pharmaceutical and medical technology company focused on developing therapies designed to treat corneal diseases and disorders and correct refractive conditions, in a stock-for-stock transaction (Avedro Merger). Avedro developed novel bio-activated drug formulations used in combination with proprietary systems for the treatment of progressive keratoconus and corneal ectasia following refractive surgery. The therapy is the first and only minimally invasive anterior segment product offering approved by the FDA shown to halt the progression of keratoconus.

Total consideration for the Avedro Merger was $437.8 million. The consideration consisted of Glaukos common stock valued at $406.8 million issued to replace Avedro common stock, Glaukos shares valued at $0.2 million to replace certain vested Avedro warrants, and $30.8 million of value attributable to the pre-combination services associated with replacement of all Avedro outstanding and unexercised stock option awards and all unvested restricted stock units (Replacement Awards). See Note 2, Note 4, Note 6 and Note 7 to the consolidated financial statements in Item 8 of this Annual Report on Form 10-K for additional information on our Avedro Merger.

Factors Affecting Our Performance

In addition to the disruption resulting from COVID-19 as discussed above, the full effects of which at this time are difficult to predict, our operations to date have been, and we believe our future growth will be, impacted by the following:

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Further, subject to our temporary costs saving initiatives and spending deferrals due to COVID-19, we have made and expect to continue to make significant investments in our global sales force, marketing programs, research and development activities, clinical studies, and general and administrative infrastructure. FDA-approved investigational device exemption (IDE) or investigational new drug (IND) studies and new product development programs in our industry are expensive. We have incurred a significant increase in administrative costs since we began operating as a public company. Our operating expenses have increased significantly following our acquisition of Avedro, and we also expect to incur additional construction costs related to our new facility in Aliso Viejo, California.

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We expect 2021 revenues and near-term performance to reflect competitive dynamics and the continuing disruption resulting from COVID-19, the full effects of which at this time are difficult to predict.

Although we have been profitable for certain periods in our operating history, there can be no assurance that we will be profitable or generate cash from operations in the future.

Components of Results of Operations

Net Sales

We currently operate in one reportable segment and net sales are generated primarily from sales of iStent products and, following the Avedro Merger on November 21, 2019, sales of Photrexa and other associated drug formulations, as well as our proprietary bioactivation systems, to customers. Revenue is recognized when control of the promised goods or services is transferred to the customer in an amount that reflects the consideration to which we expect to be entitled in exchange for those products or services.

We sell our products through a direct sales organization in the United States, and outside the United States we sell our products primarily through direct sales subsidiaries in sixteen countries and through independent distributors in certain countries in which we do not have a direct presence or maintain a modest commercial presence. The primary end-user customers for our products are surgery centers, hospitals and physician private practices.

While net sales may increase as we expand our global sales and marketing infrastructure and continue to increase awareness of our products by expanding our sales base and increasing our marketing efforts, historically our net sales within a fiscal year have been impacted seasonally, as demand for U.S. ophthalmic procedures is typically softer in the first quarter and stronger in the fourth quarter of a given year. However, we have not experienced the same seasonality pattern in 2020 due to the COVID-19 pandemic, and its effect on our commercial performance may continue into future reporting periods. Additionally, for several years we had commercialized our products in the U.S. with few or no direct competitors. Other products have now become available in the U.S. and globally, or are in development by third parties, that have entered or could enter the market and which may affect adoption of or demand for our products. These other products could achieve greater commercial acceptance or demonstrate better safety or effectiveness, clinical results, ease of use or lower costs than our products, which could adversely impact our net sales.

Cost of Sales

Cost of sales reflects the aggregate costs to manufacture our products and includes raw material costs, labor costs, manufacturing overhead expenses and the effect of changes in the balance of reserves for excess and obsolete inventory.

We manufacture our iStent products at our current headquarters in San Clemente, California using components manufactured by third parties. We manufacture our KXL and Mosaic systems at our manufacturing facilities in Burlington, Massachusetts, with some limited manufacturing operations in Dublin, Ireland, and we contract with third-party manufacturers in the U.S. and Germany to produce our Photrexa and other associated drug formulations.

Due to the relatively low production volumes of our iStent products and our KXL and Mosaic systems compared to our potential capacity for those products, a significant portion of our per unit costs is comprised of manufacturing overhead expenses. These expenses include quality assurance, material procurement, inventory control, facilities, equipment and operations supervision and management.

Cost of sales includes a charge equal to a low single-digit percentage of worldwide net sales of certain current and future products, including our iStent products, with a required minimum annual payment of $0.5 million, which amount became payable to the Regents of the University of California (the University) in connection with our December 2014 agreement with the University (the UC Agreement) related to a group of our U.S. patents (the Patent Rights). This ongoing product payment obligation will change as patent coverage on certain products being to lapse, and will terminate entirely terminate on the date the last of the Patent Rights expires, which is currently expected to be in 2022.

Under the Protecting Americans from Tax Hikes Act of 2015 (PATH Act), the 2.3% federal medical device excise tax on U.S. sales of medical devices manufactured by us was suspended from January 1, 2016 to December 31,

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2017, and, pursuant to HR 195 passed on January 22, 2018, was further suspended through December 31, 2019. The federal medical device excise tax was permanently repealed in December 2019.

Beginning in the fourth quarter of 2019, cost of sales has included amortization of the $252.2 million developed technology intangible asset recognized in connection with the Avedro Merger. For the years ended December 31, 2020 and December 31, 2019, the amortization expense was $22.1 million and $2.3 million, respectively. Additionally, beginning in the fourth quarter of 2019, cost of sales has included amortization of the fair market value inventory adjustment recorded in connection with the Avedro Merger, which for the years ended December 31, 2020 and December 31, 2019 was $24.7 million and $4.0 million, respectively.

Our future gross profit as a percentage of net sales, or gross margin, will be impacted by numerous factors including commencement of sales of products in our pipeline, or any other future products, which may have higher product costs. Our gross margin will also be affected by manufacturing inefficiencies that we may experience as we attempt to manufacture our products on a larger scale, manufacture new products and change our manufacturing capacity or output. Additionally, our gross margin will continue to be affected by the aforementioned expense related to the UC Agreement and the acquisition fair market value inventory adjustment rollout related to the Avedro Merger. See Note 6, Business Combinations to the consolidated financial statements in Item 8 of this Annual Report on Form 10-K for additional information on our Avedro Merger. The current COVID-19 pandemic may impact our gross profit margins given the potential impact to net sales in future periods.

Selling, General and Administrative

Our selling, general and administrative (SG&A) expenses primarily consist of personnel-related expenses, including salaries, sales commissions, bonuses, fringe benefits and stock-based compensation for our executive, financial, marketing, sales, and administrative functions. Other significant SG&A expenses include marketing programs; advertising; post-approval clinical studies; conferences and congresses; travel expenses; costs associated with obtaining and maintaining our patent portfolio; professional fees for accounting, auditing, consulting and legal services; costs to implement our global enterprise systems; and allocated overhead expenses.

The Avedro Merger has resulted in additional integration expenses, restructuring expenses and personnel-related expenses during the year ended December 31, 2019 and additional personnel-related expenses, primarily stock-based compensation during the year ended December 31, 2020. Additionally, SG&A will continue to be impacted by the amortization of certain finite-lived intangible assets acquired as a result of the Avedro Merger, along with Avedro’s normal and recurring SG&A expenses.

We expect SG&A expenses to continue to grow as a result of the Avedro Merger as we increase our global sales and marketing infrastructure and general administration infrastructure in the United States; however, as discussed above under “Impact of COVID-19 Pandemic and Current Economic Environment,” we have sought to preserve our cash position by instituting a number of cost saving initiatives, including temporary reductions in discretionary spending, including variable expense associated with salesperson commissions and marketing, capital expenditures, as well as a temporary salary reduction for many of our employees, which as of the date hereof, have all been reinstated. We have started to reinstitute our plans to move forward with the planned capital expenditures as state and local governments begin to authorize re-openings. We also expect other nonemployee-related costs, including sales and marketing program activities for new products, outside services and accounting and general legal costs to increase as our overall operations grow. The timing of these increased expenditures and their magnitude are primarily dependent on the commercial success and sales growth of our products, as well as on the timing of any new product launches and other potential business and operational activities.

Research and Development

Our R&D activities primarily consist of new product development projects, pre-clinical studies, IDE and IND studies, and other clinical trials. Our R&D expenses primarily consist of personnel-related expenses, including salaries, fringe benefits and stock-based compensation for our R&D employees; research materials; supplies and services; and the costs of conducting clinical studies, which include payments to investigational sites and investigators, clinical research

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organizations, consultants, and other outside technical services and the costs of materials, supplies and travel. We expense R&D costs as incurred. We expect our R&D expenses to continue to increase as we initiate and advance our development programs, including our expanding surgical, pharmaceutical and IOP sensor development efforts and clinical trials across glaucoma, retinal disease and corneal health. However as previously noted we have sought to preserve our cash position by instituting a number of cost saving initiatives, including temporary reductions in discretionary spending associated with earlier stage development programs many of which we have begun to allocate funding beginning in the third quarter and throughout the fourth quarter of 2020.

Completion dates and costs for our clinical development programs include seeking regulatory approvals and our research programs vary significantly for each current and future product candidate and are difficult to predict. As a result, while we expect our R&D costs to continue to increase for the foreseeable future, subject to our temporary COVID-19 costs saving initiatives, we cannot estimate with any degree of certainty the costs we will incur in connection with the development of our product candidates. We anticipate we will make determinations as to which programs and product candidates to pursue and how much funding to direct to each program and product candidate on an ongoing basis in response to the scientific success of early research programs, results of ongoing and future clinical trials, as well as ongoing assessments as to each current or future product candidate’s commercial potential and our likelihood of obtaining necessary regulatory approvals. We are not currently able to fully track expenses by product candidate.

In-Process Research and Development

Our in-process research and development (IPR&D) expenses relate to the acquisition of DOSE Medical Corporation (DOSE) in which DOSE became a wholly-owned subsidiary of the Company. DOSE is developing multiple micro-invasive, sustained-released, bioerodible drug delivery platforms designed to be used in the treatment of various retinal diseases, including age-related macular degeneration and diabetic macular edema. Certain DOSE assets were in the development-stage at the time of purchase and were determined to have no alternative future use.

Non-Operating (Expense) Income, Net

Non-operating (expense) income, net primarily consists of interest expense associated with our finance lease for our Aliso Viejo, California facility and for our Convertible Notes, interest income derived from our short-term investments and unrealized gains and losses arising from exchange rate fluctuations on transactions denominated in a currency other than the U.S. dollar, primarily related to intercompany loans.

Income Taxes

Our tax benefit is comprised of U.S. federal and state income and franchise taxes as well as foreign income taxes. Our current U.S. federal tax benefit results from the carryback of NOLs and R&D tax credits permitted by the CARES Act for the year ended December 31, 2020. Our current state tax provision results from state minimum and franchise taxes for the year ended December 31, 2020. Our current foreign tax provision results from foreign income taxes imposed on profitable operations in our foreign subsidiaries for the year ended December 31, 2020. Our U.S. federal and state deferred tax benefit results from the deferred tax liability recorded in connection with the Convertible Notes which may be used as a source of future taxable income allowing us to record a tax benefit for a portion of our operating losses generated for the year ended December 31, 2020. Our net deferred tax liability of $10.5 million at December 31, 2020 represents the excess of our indefinite-lived deferred tax liabilities over our indefinite-lived deferred tax assets, as well as deferred tax liabilities recorded to additional paid-in capital within the consolidated statement of stockholders’ equity which were not available to offset our deferred tax assets. We continue to provide a valuation allowance against our other net deferred tax assets.

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We record reserves for uncertain tax positions where we believe the ability to sustain the tax position does not reach the more likely than not threshold.

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Results of Operations

Comparison of Years Ended December 31, 2020 and December 31, 2019

NM = Not Meaningful

Net Sales

Net sales for the years ended December 31, 2020 and December 31, 2019 were $225.0 million and $237.0 million, respectively, reflecting a decrease of $12.0 million or 5%.

Net sales of glaucoma products in the United States were $133.7 million and $187.7 million for the years ended December 31, 2020 and December 31, 2019, respectively, decreasing by approximately 28% primarily due to the disruption resulting from COVID-19. We believe competition had also increased entering into 2020, the impact of which is difficult to assess given the COVID-19 disruption. International sales of glaucoma products for the years ended December 31, 2020 and December 31, 2019 were $45.6 million and $43.3 million, respectively, increasing by approximately 5%. The increase in net sales internationally was due to sales expansion in certain of our existing international markets, partially offset by the disruption resulting from COVID-19. Additionally, in the second half of 2020, we launched our next generation iStent inject product, the iStent inject W. Pricing of our glaucoma products in the United States and internationally remained stable and did not provide a significant contribution to the results in 2020. As such, changes in unit volumes were the primary driver of the year over year change.

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Net sales of corneal health products were $45.6 million and $6.0 million for the years ended December 31, 2020 and December 31, 2019, respectively, as a result of the full year operations of Avedro during the year ended December 31, 2020 that were not in our operating results for the majority of 2019. The $39.6 million increase in net sales generated from our corneal health products was comprised of an increase of approximately $34.6 million in U.S. sales, including an increase of $31.3 million of Photrexa net sales, using our direct sales operations and an increase of approximately $5.0 million in net sales with distributors being used in certain international locations where we do not have a direct commercial presence. Sales of corneal health products in 2020 were negatively impacted by disruption resulting from COVID-19.

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Cost of Sales

Cost of sales for the years ended December 31, 2020 and December 31, 2019 were $91.7 million and $38.6 million, respectively, reflecting an increase of approximately $53.1 million or 138%. The increase was primarily comprised of approximately $24.7 million, net related to the acquisition fair market value inventory adjustment rollout, and $22.1 million related to amortization of certain finite-lived intangible assets acquired, both of which are related to the Avedro Merger. Our gross margin was approximately 59% for the year ended December 31, 2020 compared to

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approximately 84% for the year ended December 31, 2019. The decreased gross margin resulted primarily from the impact of the aforementioned accounting adjustments related to the Avedro Merger and, to a lesser extent, changes in product mix, most notably the inclusion of modestly lower margin products related to the Avedro Merger and international market sales.

Selling, General and Administrative Expenses

SG&A expenses for the years ended December 31, 2020 and December 31, 2019 were $171.4 million and $176.6 million, respectively, reflecting a decrease of $5.2 million or 3%.

We incurred approximately $98.2 million of commercial personnel and discretionary spending in the year ending December 31, 2020 related primarily to existing sales infrastructure in glaucoma, training samples and marketing associated with our global launch of iStent Inject W and expansion of our sales infrastructure and commercial activities in Corneal Health. We also incurred approximately $73.2 million of general and administrative personnel and discretionary spending associated with our ongoing administrative functions, previously disclosed patent litigation and global enterprise systems implementation, and amortization of our right-of-use asset related to our long-term lease in Aliso Viejo, California.

Our results for the year ending December 31, 2020 include approximately $24.6 million in additional SG&A expenses as a result of the full year operations of Avedro that were not in our operating results for the majority of 2019. These expenses were primarily comprised of commercial personnel and discretionary spending of $16.7 million and general and administrative personnel and discretionary spending of $7.9 million.

The above increase in expenses associated with the full year operations of Avedro was offset by reductions in SG&A expenses for the year ended December 31, 2020 primarily consisting of a decrease of approximately $9.4 million in professional services and software systems costs related to our global enterprise systems implementation, decreases of $6.3 million and $3.2 million in transaction expenses and restructuring expenses, respectively, related to our acquisition of Avedro and a decrease of approximately $3.1 million related to our previously disclosed patent litigation. The remaining decrease in expenses of approximately $7.8 million primarily relates to decreased sales and marketing expenses and broader SG&A cost savings related to the COVID-19 pandemic.

Research and Development Expenses

R&D expenses for the years ended December 31, 2020 and December 31, 2019 were $85.4 million and $68.3 million, respectively, reflecting an increase of $17.1 million or 25%.

Our R&D expenses for the year ended December 31, 2020 primarily relate to compensation and related employee expenses and project spending associated with our emerging pipeline of product candidates, including the clinical and development costs associated with iDose TR, iStent Infinite, the continued development of a pharmaceutical therapeutic system for the treatment of keratoconus without the removal of the epithelium (often referred to as iLink epi-on), as well as earlier stage micro-surgical, pharmaceutical, and biosensor projects that span across glaucoma, dry eye, presbyopia, and common retina conditions such as neovascular age-related macular degeneration, diabetic macular edema, and retinal vein occlusion.

Our results for the year ending December 31, 2020 include approximately $19.1 million in additional R&D expenses that were not in our operating results for the majority of 2019. These expenses were primarily comprised of $8.3 million of compensation and related employee expenses and approximately $10.8 million in other core R&D and clinical expenses spent on the continued development of iLink epi-on and other earlier stage technology and therapeutic investments.

The above increase in expenses as a result of the full year operations of Avedro was primarily offset by reductions of R&D spending related to the COVID-19 pandemic of approximately $1.3 million primarily related to decreased personnel and discretionary spending on our earlier stage programs.

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In-Process Research and Development

There were no IPR&D expenses for the year ended December 31, 2020. IPR&D expenses for the year ended December 31, 2019 were $3.7 million, comprised of $2.2 million related to the purchase of certain DOSE assets and $1.5 million related to the upfront payment for our exclusive global licensing agreement with Intratus.

Non-Operating (Expense) Income, Net

We had non-operating expense, net of $8.8 million and $0.3 million of non-operating income, net for the years ended December 31, 2020 and December 31, 2019, respectively. The increase in non-operating expense, net primarily relates to interest expense recognized related to the Convertible and recognition of unrealized foreign currency losses due to higher intercompany loan balances denominated in, and impacted by, changes in foreign currency exchange rates.

Income Tax (Benefit) Provision

Our effective tax rate for the year ended 2020 was not meaningful due to the large deferred tax benefit recorded in connection with the Convertible Notes relative to the amount of our net loss before taxes. For the year ended December 31, 2020 we recorded a (benefit) for income taxes of $(12.0) million which was primarily the result of the deferred tax liability recorded in conjunction with the Convertible Notes as a source of taxable income to benefit the current year losses, partially offset by current U.S. state and foreign income taxes. For the year ended December 31, 2019 we recorded a (benefit) for income taxes of $(65.5) million that was primarily comprised of the U.S. federal and state deferred tax benefit recorded in connection with the Avedro Merger relative to the amount of net loss before taxes, partially offset by current U.S. state and foreign income taxes.

Comparison of Years ended December 31, 2019 and December 31, 2018

NM = Not Meaningful

Net Sales

Net sales for the years ended December 31, 2019 and December 31, 2018 were $237.0 million and $181.3 million, respectively, reflecting an increase of $55.7 million or 31%.

The increase in net sales from our glaucoma products resulted primarily from expansion of U.S. sales of our iStent inject, the withdrawal from the market of a competitive MIGS device in late August 2018, and direct sales operations in our existing international markets. Net sales of glaucoma products in the United States were $187.7 million and $151.7 million for the years ended December 31, 2019 and December 31, 2018, respectively, increasing by 24%. International sales for the years ended December 31, 2019 and December 31, 2018 were $43.3 million and $29.6 million,

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respectively, increasing by 46%. Net sales at our subsidiaries in Australia, Germany, Japan, France and the United Kingdom accounted for the majority of the increase internationally.

The remaining $6.0 million increase in net sales was generated from our corneal health products as a result of our Avedro Merger on November 21, 2019.

Pricing for our products was not a significant contributing factor to the increase in net sales for the year ended December 31, 2019.

Cost of Sales

Cost of sales for the years ended December 31, 2019 and December 31, 2018 were $38.6 million and $25.1 million, respectively, reflecting an increase of approximately $13.5 million or 54%. The increase was driven by growing worldwide volume, with approximately $4.0 million related to the acquisition fair market value inventory adjustment rollout and $2.3 million related to amortization of certain finite-lived intangible assets acquired, both of which are related to the Avedro Merger; offset by a one-time federal medical device excise tax refund benefit of approximately $0.5 million. Our gross margin was approximately 84% for the year ended December 31, 2019 compared to approximately 86% for the year ended December 31, 2018.

Selling, General and Administrative Expenses

SG&A expenses for the years ended December 31, 2019 and December 31, 2018 were $176.6 million and $119.5 million, respectively, reflecting an increase of $57.1 million or 48%.

The acquisition of Avedro represented an increase in SG&A expenses of $19.1 million that were not in our 2018 results. These expenses were primarily comprised of $7.6 million due to stock-based compensation resulting from post-combination services associated with the Replacement Awards, $7.1 million related to legal, financial advisory and other transaction costs associated with the acquisition, and amortization of finite-lived intangible assets acquired of approximately $0.3 million. In connection with the Avedro acquisition, we implemented a restructuring plan in December 2019 that includes an estimated headcount reduction of 40 employees and a reallocation of responsibilities primarily within the SG&A functions. As of December 31, 2019 we have accrued $4.1 million of restructuring plan costs, and we expect to incur a total of approximately $5.6 million in restructuring charges upon completion of the plan, which we expect to be completed in 2021.

We incurred $3.5 million in normal and recurring Avedro SG&A expenses from acquisition date through December 31, 2019 that were not in our 2018 results.

Additionally, the increase in SG&A expenses for the year ended December 31, 2019 primarily consisted of approximately $5.7 million related to our previously-disclosed patent litigation, approximately $10.1 million in professional services and software systems costs related to our global enterprise systems implementation, and $8.3 million in additional compensation and related employee expenses was associated with our growing number of domestic and international employees.

The remaining increase in SG&A expenses was primarily comprised of expenses incurred for training samples related to our U.S. launch of iStent inject, amortization of our right-of-use asset related to our long-term lease in Aliso Viejo, California and non-employee related expenses incurred by our foreign subsidiaries.

Research and Development Expenses

R&D expenses for the years ended December 31, 2019 and December 31, 2018 were $68.3 million and $49.7 million, respectively, reflecting an increase of $18.6 million or 38%. The increase in R&D expenses was primarily the result of approximately $4.8 million in additional compensation and related employee expenses as well as an overall increase of approximately $12.3 million in other core R&D and clinical expenses, including expenses associated with our iDose Travoprost Phase III clinical trials. The acquisition of Avedro also represented an increase of approximately $1.5 million in R&D expenses that were not in our 2018 results.

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In-Process Research and Development

IPR&D expenses for the year ended December 31, 2019 were $3.7 million, comprised of $2.2 million related to the purchase of certain DOSE assets and $1.5 million related to the upfront payment for our exclusive global licensing agreement with Intratus. There were no IPR&D expenses for the year ended December 31, 2018.

Non-Operating Income, Net

We had non-operating income, net of $0.3 million and $0.6 million for the years ended December 31, 2019 and December 31, 2018, respectively. These amounts primarily relate to interest expense associated with the financing lease for our Aliso Viejo, California facility and recognition of unrealized foreign currency losses due to higher intercompany loan balances denominated in, and impacted by, changes in foreign currency exchange rates offset by increases in interest income related to our short-term investments.

Income Tax (Benefit) Provision

Our effective tax rate for the year ended 2019 was not meaningful due to the large deferred tax benefit recorded in connection with the Avedro Merger relative to the amount of our net loss before taxes. For the year ended December 31, 2019 we recorded a (benefit) for income taxes of $(65.5) million which was primarily comprised of the U.S. federal and state deferred tax benefit related to the Avedro Merger. For the year ended December 31, 2018 we recorded a provision for income taxes of $0.6 million that was primarily comprised of current U.S. state and foreign income taxes.

Liquidity and Capital Resources

For the year ended December 31, 2020, we incurred a net loss of $120.3 million and used cash from operations of $23.0 million. As of December 31, 2020, we had an accumulated deficit of approximately $310.1 million. We fund our operations from cash generated from commercial operations and proceeds from exercises of stock options, in addition to utilizing funds from the June 2020 issuance of the Convertible Notes. We have made and expect to continue to make significant investments in our global sales force, marketing programs, research and development activities, clinical studies and general and administrative infrastructure. FDA-approved IDE and IND studies and new product development programs in our industry are expensive. However, due to the COVID-19 economic slowdown, as disclosed above under “Impact of COVID-19 Pandemic and Current Economic Environment”, we have also sought to preserve our cash position by instituting a number of cost saving initiatives, including substantial reductions in discretionary spending and capital expenditures, as well as a temporary salary reduction for many of our employees, which were reinstated in the fourth quarter of 2020.

We have incurred a significant increase in administrative costs since we began operating as a public company. Our operating expenses have increased significantly following our acquisition of Avedro, and we also expect to incur additional construction costs related to our new facility in Aliso Viejo, California.

Our Convertible Notes may be converted at the option of the holders at the times and under the circumstances and at the conversion rate described in Note 9, Convertible Senior Notes. As of December 31, 2020, none of the conditions allowing holders of the Convertible Notes to convert had been met. If our trading price remains above 130% of the conversion price for at least 20 trading days during the 30 consecutive trading-day period ending on, and including, March 31, 2021, holders of the Convertible Notes would have the right to convert their Convertible Notes during the calendar quarter beginning April 1, 2021. Upon conversion, we will pay or deliver, as the case may be, cash, shares of our common stock or a combination of cash and shares of our common stock, at our election, in the manner and subject to the terms and conditions provided in the Indenture. Our current intent is to settle the principal amount of the Convertible Notes in cash upon conversion, with any remaining conversion value being delivered in shares of our common stock.

We plan to fund our operations, capital funding and other liquidity needs using existing cash and investments and, to the extent available, cash generated from commercial operations. Our existing cash and investments includes the remaining net proceeds from the Convertible Notes issued in June 2020 (after payment for the related capped call

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transactions), which we are using for working capital and general corporate purposes. Although we have been profitable for certain periods in our operating history, there can be no assurance that we will be profitable or generate cash from operations. We may seek to obtain additional financing in the future through other debt or equity financings. There can be no assurance that we will be able to obtain additional financing on terms acceptable to us, or at all. We believe that our available cash, cash equivalents, investment balances and interest we earn on these balances and any cash generated from commercial operations will be sufficient to fund our operations and satisfy our liquidity requirements for at least the next 12 months from the date our consolidated financial statements for the year ended December 31, 2020 are made publicly available.

The following table summarizes our cash and cash equivalents, short-term investments and selected working capital data as of December 31, 2020 and December 31, 2019 (in thousands):

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Cash Flows

Our historical cash outflows have primarily been associated with cash used for operating activities such as the expansion of our sales, marketing and R&D activities; purchase of and growth in inventory and other working capital needs; the acquisition of intellectual property; and expenditures related to equipment and improvements used to increase our manufacturing capacity, to improve our manufacturing efficiency and for overall facility expansion.

The following table is a condensed summary of our cash flows for the periods indicated:

At December 31, 2020, our cash and cash equivalents were held for working capital purposes. We do not enter into investments for trading or speculative purposes. Our policy is to invest any cash in excess of our immediate requirements in investments designed to preserve the principal balance and provide liquidity.

Operating Activities

In the year ended December 31, 2020 and December 31, 2019, our operating activities used $23.0 million and $0.4 million of net cash, respectively. In the year ended December 31, 2018 our operating activities generated $18.9 million of net cash.

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For the year ended December 31, 2020, included in net cash used in operating activities reflected our net loss of $120.3 million, adjusted for non-cash items of $100.6 million, primarily consisting of stock-based compensation expense of $46.5 million, depreciation and amortization of $29.4 million, amortization of the inventory fair value adjustment as a result of the Avedro Merger of $24.7 million, amortization of lease right-of-use assets of $5.2 million, the fair value of cash-settled stock options of $3.2 million and a deferred income tax benefit of $12.2 million. This was offset by changes in operating assets and liabilities of $3.2 million, which resulted from decreases in accounts receivable, inventory, and other assets partially offset by decreases in accounts payable and accrued liabilities and increases in prepaid expenses and other assets.

For the year ended December 31, 2019, included in net cash used in operating activities reflected our net income of $15.4 million, adjusted for non-cash items of $7.3 million, primarily consisting of stock-based compensation expense of $36.3 million, depreciation and amortization of $6.3 million, amortization of the inventory fair value adjustment as a result of the Avedro Merger of $4.0 million, amortization of lease right-of-use assets of $3.6 million, the fair value of cash-settled stock options of $3.1 million and a deferred income tax benefit of $66.3 million. This was offset by changes in operating assets and liabilities of $8.5 million, which resulted from increases in accounts receivable, prepaid expenses and other current assets and other assets totaling $9.3 million, offset by increases in accounts payable and accrued liabilities and inventory of $0.8 million.

For the year ended December 31, 2018, included in net cash provided by operating activities reflected our net loss of $13.0 million, adjusted for non-cash items of $35.4 million, primarily consisting of stock-based compensation expense of $25.7 million and depreciation and amortization of $6.3 million. This was partially offset by changes in operating assets and liabilities of $3.6 million, which resulted from increases in accounts receivable, inventory and prepaid expenses and other current assets totaling $6.3 million, offset by increases in accounts payable and accrued liabilities and other assets of $2.7 million.

Investing Activities

In the year ended December 31, 2020 net cash from investing activities used approximately $205.1 million. In the year ended December 31, 2019, net cash from investing activities generated $43.4 million, and in the year ended December 31, 2018, we used approximately $26.4 million.

In the year ended December 31, 2020, we used approximately $301.0 million for purchases of short-term investments, received proceeds from sales and maturities of short-term investments of $104.7 million and used approximately $1.8 million related to investments in company-owned life insurance.

In the year ended December 31, 2019, we used approximately $80.4 million for purchases of short-term investments, received proceeds from sales and maturities of short-term investments of $80.5 million and used approximately $1.6 million related to investments in company-owned life insurance. Additionally, the Avedro Merger resulted in an increase in cash from investing activities of $49.7 million.

In the year ended December 31, 2018, we used approximately $93.7 million for purchases of short-term investments, received proceeds from sales and maturities of short-term investments of $78.9 million and used approximately $1.2 million related to investments in company-owned life insurance.

Cash used for purchases of property and equipment was approximately $6.9 million, $4.7 million and $10.3 million for the years ended December 31, 2020, December 31, 2019 and December 31, 2018, respectively.

Subject to our near-term deferral of certain capital expenditures due to the COVID-19 pandemic, we expect to increase our investment in property and equipment in the future as we expand our manufacturing capacity for current and new products, improve our manufacturing efficiency and for overall facility expansion, as discussed above.

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Financing Activities

In the year ended December 31, 2020 and December 31, 2018 our financing activities provided $262.5 million and $21.6 million of net cash, respectively, whereas in the year ended December 31, 2019, our financing activities used $9.6 million of net cash.

In the year ended December 31, 2020, we received net cash proceeds of approximately $287.5 million related to our Convertible Notes, used $9.6 million for transaction costs related to the Convertible Notes and used $35.7 million on payment of the capped call transaction related to the Convertible Notes. We received net cash proceeds of approximately $24.2 million from the exercises of stock options and purchases of our common stock by employees pursuant to our Employee Stock Purchase Plan and used $3.9 million for payment of employee taxes related to restricted stock unit vestings.

In the year ended December 31, 2019, we used approximately $22.5 million for payment of debt assumed related to the Avedro Merger, we received net cash proceeds of approximately $18.5 million from the exercises of stock options and purchases of our common stock by employees pursuant to our Employee Stock Purchase Plan and used $5.6 million for payment of employee taxes related to restricted stock unit vestings.

In the year ended December 31, 2018, we received net cash proceeds of approximately $22.2 million from the exercises of stock options and purchases of our common stock by employees pursuant to our Employee Stock Purchase Plan and used $0.6 million for payment of employee taxes related to restricted stock unit vestings.

Contractual Obligations

The following table summarizes our known contractual obligations as of December 31, 2020 and the effect those obligations are expected to have on our liquidity and cash flows in future periods.

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Off-balance Sheet Arrangements

We do not have any off-balance sheet arrangements as defined in the rules and regulations of the Securities and Exchange Commission. We do not have any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or for any other contractually narrow or limited purpose. However, from time to time we enter into certain types of contracts that contingently require us to indemnify parties against third-party claims including in connection with certain real estate leases, and supply purchase agreements, and with directors and officers. The terms of such obligations vary by contract and in most instances a maximum dollar amount is not explicitly stated therein. Generally, amounts under these contracts cannot by reasonably estimated until a specific claim is asserted, thus no liabilities have been recorded for these obligations on our balance sheets for any of the periods presented.

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Critical Accounting Policies and Significant Estimates

Management’s discussion and analysis of our financial condition and results of operations are based on our consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). The preparation of these consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets and liabilities and related disclosure of contingent assets and liabilities, revenue and expenses at the date of the consolidated financial statements. Generally, we base our estimates on historical experience and on various other assumptions in accordance with GAAP that we believe to be reasonable under the circumstances. Actual results may differ materially from these estimates under different assumptions or conditions and such differences could be material to our financial position and results of operations.

While our significant accounting policies are more fully described in the Notes to our consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K, we believe the following accounting policies to be most critical for fully understanding and evaluating our financial condition and results of operations.

Revenue Recognition

We derive our revenue from sales of our products in the United States and internationally. Customers are primarily comprised of ambulatory surgery centers, hospitals and physician private practices, with distributors being used in certain international locations where we do not have a direct commercial presence.

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We concluded that one performance obligation exists for the majority of our contracts with customers which is to deliver products in accordance with our normal delivery times. Revenue is recognized when this performance obligation is satisfied, which is the point in time when we consider control of a product to have transferred to the customer. Revenue recognized reflects the consideration to which we expect to be entitled in exchange for those products or services. We have determined the transaction price to be the invoice price, net of adjustments, which includes estimates of variable consideration for certain product returns.

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We offer volume-based rebate agreements to certain customers and, in these instances, we provide a rebate (in the form of a credit memo) at the contract’s conclusion, if earned by the customer. In such cases, the transaction price is allocated between our delivery of product and the issuance of a rebate at the contract’s conclusion for the customer to utilize on prospective purchases. The performance obligation to issue a customer’s rebate, if earned, is transferred over time and our method of measuring progress is the output method, whereby the progress is measured by the estimated rebate earned to date over the total rebate estimated to be earned over the contract period. The provision for volume-based rebates is estimated based on customers' contracted rebate programs and the customers’ projected sales levels. We periodically monitor our customer rebate programs to ensure the rebate allowance is fairly stated. Our rebate allowance is included in accrued liabilities in the consolidated balance sheets and estimated rebates accrued were not material during the periods presented.

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Additionally, we have a performance obligation related to certain customers’ right to a future discount on single dose pharmaceutical purchases in the U.S., and that performance obligation is expected to be recognized when the customer elects to utilize the discount, which is generally within one year. Additionally, we have a performance obligation related to extended warranty agreements with customers related to our KXL systems.

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Customers are not granted specific rights of return; however, we may permit returns of certain products from customers if such product is returned in a timely manner and in good condition. We generally provide a warranty on our products for one year from the date of shipment, and offer an extended warranty for our KXL systems. Any product found to be defective or out of specification will be replaced or serviced at no charge during the warranty period. Estimated allowances for sales returns and warranty replacements are recorded at the time of sale of the product and are estimated based upon the historical patterns of product returns matched against sales, and an evaluation of specific factors that may increase the risk of product returns. Product returns and warranty replacements to date have been consistent with amounts reserved or accrued and have not been significant. If actual results in the future vary from our estimates, we will adjust these estimates which would affect net product revenue and earnings in the period such variances become known.

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Clinical Trial Expense Accruals

As part of our R&D expenses, we accrue at each balance sheet date the estimated costs of clinical study activities performed by third-party clinical sites with whom we have agreements providing for fees based upon the quantities of subjects enrolled and clinical evaluation visits that occur over the life of the study. The estimates are determined based upon a review of the agreements and data collected by internal and external clinical personnel as to the status of enrollment and subject visits, and are based upon the facts and circumstances known to us at each financial reporting date. If the actual timing of performance of activities varies from the assumptions used in the estimates, we adjust the accruals accordingly. There have been no material adjustments to our prior period accrued estimates for clinical trial activities through December 31, 2020. If we underestimate or overestimate the activity or fees associated with a study or service at a given point in time, adjustments to R&D expenses may be necessary in future periods. Subsequent changes in estimates may result in a material change in our accruals. Material nonrefundable advance payments for goods and services, including fees for process development or manufacturing and distribution of clinical supplies that will be used in future research and development activities, are deferred and recognized as expense in the period that the related goods are consumed or services are performed.

Intangible Assets

Intangible assets primarily consist of developed technology, customer relationships, and IPR&D assets related to the Avedro Merger, as well as the buyout of a royalty payment obligation.

Intangible assets with finite-lives include developed technology, customer relationships and the buyout of a royalty payment obligation, which are amortized on a straight-line basis over their estimated useful lives, which range from five to eleven years. We review finite-lived intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets or asset group may not be recoverable. When such an event occurs, management determines whether there has been impairment by comparing the anticipated undiscounted future net cash flows to the related asset group’s carrying value.

Indefinite-lived intangible assets are comprised of IPR&D assets associated with other applications of Avedro’s corneal remodeling platform, which will not be amortized until technological feasibility is met, but will be assessed for impairment annually.

Please see Note 7, Intangible Assets and Goodwill to the consolidated financial statements in Item 8 of this Annual Report on Form 10-K for additional information on our intangible assets.

Goodwill

Goodwill represents the excess of the purchase price of an acquired business over the fair value of the identifiable assets acquired and liabilities assumed. Goodwill is not amortized, but is tested for impairment annually in the fourth quarter, or more frequently if events or circumstances indicate the carrying value may no longer be recoverable and that an impairment loss may have occurred. The Company operates as one segment, which is considered to be the sole reporting unit, and therefore goodwill is tested for impairment at the consolidated level. Please see Note 6, Business Combinations and Note 7, Intangible Assets and Goodwill to the consolidated financial statements in Item 8 of this Annual Report on Form 10-K for additional information on our goodwill.

Inventory Valuation

Except for inventory acquired in connection with the Avedro Merger, further described in Note 6, Business Combinations to the consolidated financial statements in Item 8 of this Annual Report on Form 10-K, we value inventory at the lower of cost and net realizable value. Cost is determined by the first-in, first-out method. This policy requires us to make estimates regarding the market value of our inventory, including an assessment of excess or obsolete inventory. We evaluate inventory for excess quantities and obsolescence based on an estimate of the future demand for

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our product within a specified time horizon, and record an allowance to reduce the carrying value of inventory as determined necessary. The estimates we use for demand are also used for near-term capacity planning and inventory purchasing and are consistent with our revenue forecasts. If our actual demand is less than our forecast demand, we may be required to take additional excess inventory charges, which would decrease gross margin and adversely impact net operating results in the future.

Stock-Based Compensation Expense

Stock-based compensation expense for stock options is measured at the date of grant, based on the estimated fair value of the award using the Black-Scholes option pricing model.

Stock-based compensation expense for restricted stock units is also measured at the date of grant, based on the closing price of our common stock.

For awards subject to time-based vesting conditions, we recognize stock-based compensation expense over the requisite service period on a straight-line basis, net of estimated forfeitures.

The estimation of the fair value of each stock-based option grant or issuance on the date of grant involves numerous assumptions by management. Although we calculate the fair value under the Black-Scholes option pricing model, which is a standard option pricing model, this model still requires the use of numerous assumptions, including, among others, the expected life (turnover), volatility of the underlying equity security, a risk free interest rate and expected dividends. Because we have a limited operating history as a public company, there is a lack of company-specific historical and implied volatility data, and therefore we have estimated stock price volatility based upon an index of the historical volatilities of a group of comparable publicly-traded medical device peer companies. We will continue to apply this process until a sufficient amount of historical information regarding the volatility of our own stock price becomes available. We have estimated the expected term of our stock options using the “simplified” method, whereby the expected life equals the average of the vesting term and the original contractual term of the option. The use of different values by management in connection with these assumptions in the Black-Scholes option pricing model could produce substantially different results.

Convertible Senior Notes

We evaluate embedded conversion features within convertible debt under ASC 815, Derivatives and Hedging to determine whether the embedded conversion features should be bifurcated from the host instrument and accounted for as a derivative at fair value with changes in fair value recorded in earnings. If the conversion feature does not require derivative treatment under ASC 815, the instrument is evaluated under ASC 470-20, Debt with Conversion and Other Options.

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The carrying amount of the liability component is calculated by measuring the fair value of a similar debt instrument that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option is determined by deducting the fair value of the liability component from the par value of the convertible notes. The equity component is not re-measured as long as it continues to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount (i.e., debt discount) will be amortized to interest expense over the term of the convertible notes.

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We may record debt issuance costs and/or debt discounts in connection with raising funds through the issuance of convertible debt. These costs may be paid in the form of cash or equity (such as warrants). These costs are allocated between debt and equity, with the portion allocated to debt amortized to interest expense. If a conversion of the underlying debt occurs, a proportionate share of the unamortized amounts is immediately expensed.

Recent Accounting Pronouncements

For a description of recent accounting pronouncements, see Note 2 of the notes to our consolidated financial statements included in Part II, Item 8 of this Annual Report on Form 10-K.

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ITEM 7A.Quantitative and qualitative disclosures about market risk

Interest Rate Risk

We are exposed to market risks in the ordinary course of our business. Our cash and cash equivalents include cash in readily available checking and money market accounts, as well as a certificate of deposit. These securities are not dependent on interest rate fluctuations that could cause the principal amount of these assets to fluctuate and thus do not pose any interest rate risk to us. While we believe our cash and cash equivalents do not contain excessive risk, we cannot provide absolute assurance that in the future our investments will not be subject to adverse changes in market value.

In addition, we maintain significant amounts of cash and cash equivalents at one or more financial institutions that are in excess of federally insured limits.

Foreign Currency Exchange Risk

The financial statements of our foreign subsidiaries and their sales to customers are denominated in the foreign subsidiaries’ respective functional currencies, and therefore we have exposure to foreign currency exchange rates. The remainder of our business is primarily denominated in U.S. dollars. The effect of a 10% adverse change in exchange rates on foreign denominated cash, receivables and payables would not have been material for the periods presented. As our operations in countries outside of the United States grow, our results of operations and cash flows will be subject to fluctuations due to changes in foreign currency exchange rates, which could harm our business in the future. To date, we have not entered into any material foreign currency hedging contracts although we may do so in the future.​

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ITEM 8.FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Index to Consolidated Financial Statements

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Glaukos Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Glaukos Corporation (the Company) as of December 31, 2020 and 2019, the related consolidated statements of operations, comprehensive (loss) income, stockholders' equity and cash flows for each of the three years in the period ended December 31, 2020, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2020 and 2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with U.S. generally accepted accounting principles.

We also have 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, 2020, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated March 1, 2021 expressed an unqualified opinion thereon.

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 consolidated 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 consolidated financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated 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.

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/s/ Ernst & Young LLP

We have served as the Company's auditor since 2006.

Irvine, California

March 1, 2021

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Glaukos Corporation

Consolidated Balance Sheets

(in thousands, except par values)

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See accompanying notes to consolidated financial statements.

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Glaukos Corporation

Consolidated Statements of Operations

(in thousands, except per share amounts)