Zosano Pharma Corp - Quarter Report: 2015 June (Form 10-Q)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

For the quarterly period ended June 30, 2015

or

Commission File Number 001-36570

ZOSANO PHARMA CORPORATION

(Exact name of registrant as specified in its charter)

34790 Ardentech Court

Fremont, CA 94555

(Address of principal executive offices) (Zip Code)

(510) 745-1200

(Registrant’s telephone number, including area code)

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  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files).    Yes  x    No  ¨

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

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

As of August 4, 2015, the registrant had a total of 11,965,402 shares of its common stock, $0.0001 par value per share, outstanding.

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Zosano Pharma Corporation

Quarterly Report on Form 10-Q

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PART I. FINANCIAL INFORMATION

ZOSANO PHARMA CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except par value)

The accompanying notes are an integral part of these consolidated financial statements.

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ZOSANO PHARMA CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(unaudited; in thousands, except per share amounts)

The accompanying notes are an integral part of these consolidated financial statements.

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ZOSANO PHARMA CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited; in thousands)

The accompanying notes are an integral part of these consolidated financial statements.

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Zosano Pharma Corporation and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements

June 30, 2015

1. Organization

The Company

Zosano Pharma Corporation and subsidiaries (the Company) is a clinical stage specialty pharmaceutical company that has developed a proprietary transdermal microneedle patch system to deliver drug formulations through the skin for the treatment of a variety of indications. The Company’s microneedle patch system offers rapid onset, consistent drug delivery, improved ease of use and room-temperature stability, benefits which the Company believes often are unavailable using oral formulations or injections. The Company’s microneedle patch system has the potential to deliver numerous medications for a wide variety of indications, in commercially attractive markets.

The Company has two wholly owned subsidiaries: ZP Opco, Inc. (Opco), through which the Company conducts its primary research and development activities, and ZP Group LLC, originally a joint venture with Asahi Kasei Pharma USA and which ceased operations in connection with the termination of the joint venture in December 2013. The Company operates in one business segment to develop human pharmaceutical products. Management uses one measurement of profitability and does not segregate its business for internal reporting.

Initial Public Offering and Concurrent Private Placement

On January 30, 2015, the Company completed its initial public offering, in which it sold 4,500,000 shares of its common stock at a price of $11.00 per share, resulting in net proceeds of approximately $44.2 million, after deducting underwriting discounts and commissions and other offering expenses. The common stock began trading on The NASDAQ Capital Market on January 27, 2015 under the ticker symbol “ZSAN.” Upon the closing of the Company’s initial public offering, the principal and all unpaid and accrued interest on the related parties convertible notes outstanding as of January 30, 2015, totaling $7.4 million, automatically converted into an aggregate of 792,182 shares of common stock at a price equal to 85% of the initial public offering price, resulting in the liability for such notes being reclassified to permanent equity. On February 27, 2015, the Company sold an additional 110,000 shares of its common stock at the initial public offering price of $11.00 per share, pursuant to the underwriters’ partial exercise of their over-allotment option, resulting in additional net proceeds of approximately $1.1 million after deducting underwriting discounts and commissions.

Concurrently with the closing of its initial public offering on January 30, 2015, the Company issued and sold 1,363,636 shares of its common stock to Eli Lilly and Company (Lilly) in a private placement pursuant to a common stock purchase agreement dated November 21, 2014 between the Company and Lilly, and received net proceeds of $14.5 million, after payment of a private placement fee.

2. Summary of Significant Accounting Policies

Basis of Presentation and Use of Estimates

The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) and as required by Regulation S-X, Rule 10-01 for interim financial reporting. The preparation of the accompanying condensed consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.

Unaudited Interim Financial Information

The accompanying interim condensed consolidated financial statements are unaudited. The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the annual audited

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consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for a fair presentation of the financial positions and results of operations for the periods presented. The financial data and other information disclosed in these notes to the interim condensed consolidated financial statements are also unaudited. Since they are interim statements, the accompanying financial statements do not include all of the information and notes required by U.S. GAAP for complete financial statements. The results for the six months ended June 30, 2015 are not necessarily indicative of the results to be expected for the year ending December 31, 2015 or for any other interim period or for any future year. These financial statements should be read in conjunction with the Company’s audited financial statements for the year ended December 31, 2014 included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 as filed with the Securities and Exchange Commission.

Consolidation

The consolidated financial statements include the accounts of Zosano Pharma Corporation, ZP Opco, Inc., and ZP Group LLC post-termination of the joint venture. Intercompany balances and transactions have been eliminated in consolidation.

Significant Accounting Policies

There have been no material changes to the significant accounting policies during the six months ended June 30, 2015, as compared to the significant accounting policies described in Note 2 of the “Notes to Consolidated Financial Statements” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014, except for the following updates:

Investments in Marketable Securities

The Company classifies its investments in marketable securities as available-for-sale. Investments with maturities between three and twelve (12) months are considered short-term investments. Investments with maturities greater than 12 months are considered long-term investments. The Company’s investments classified as available-for-sale are recorded at fair value based upon quoted market prices at period end. Unrealized gains and losses that are deemed temporary in nature are recorded in accumulated other comprehensive income (loss) as a separate component of stockholders’ equity (deficit). A decline in the fair value of any security below cost that is deemed other than temporary results in a charge to earnings and the corresponding establishment of a new cost basis for the security. Premiums and discounts are amortized (accreted) over the life of the corresponding security as an adjustment to its yield. Dividend and interest income are recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of investments sold.

Deferred Offering Costs

Deferred offering costs, consisting of legal, accounting, printing and filing fees totaling approximately $1.8 million related to the initial public offering were capitalized and offset against proceeds from the initial public offering upon the closing of the offering in January 2015. As of December 31, 2014, approximately $1.5 million of expenses related to the initial public offering had been deferred as other long-term assets in the Company’s consolidated balance sheet.

Research and Development Expenses

Research and development costs are charged to expense as incurred and consist of costs related to (i) servicing the Company’s collaborative development efforts with other pharmaceutical companies, (ii) furthering the Company’s research and development efforts, and (iii) designing and manufacturing the Company’s transdermal microneedle patch and applicator for the Company’s clinical and nonclinical studies.

For the three months ended June 30, 2015, the Company incurred less than $0.1 million in research and development costs in support of the Company’s collaborative development services, approximately $1.9 million in connection with the Company’s research and development efforts, and approximately $3.1 million in the manufacturing of the Company’s microneedle patch system for the development of the Company’s product candidates. For the three months ended June 30, 2014, the Company incurred research and development costs of approximately $0.2 million in

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support of the Company’s collaborative development services to Novo Nordisk A/S (Novo Nordisk), approximately $1.2 million in connection with the Company’s research and development efforts and approximately $1.4 million in the manufacturing of the Company’s microneedle patch system for the development of the Company’s product candidates. For the six months ended June 30, 2015, the Company incurred research and development costs of approximately $0.1 million in support of the Company’s collaborative development services, approximately $3.3 million in connection with the Company’s research and development efforts, and approximately $4.7 million in the manufacturing of the Company’s microneedle patch system for the development of the Company’s product candidates. For the six months ended June 30, 2014, the Company incurred research and development costs of approximately $0.3 million in support of the Company’s collaborative development services to Novo Nordisk, approximately $2.6 million in connection with the Company’s research and development efforts and approximately $2.8 million in the manufacturing of the Company’s microneedle patch system for the development of the Company’s product candidates.

Net Loss Per Common Share

Basic net income (loss) per common share is calculated by dividing the net income (loss) by the weighted-average number of common shares outstanding during the period, without consideration for potential dilutive common stock equivalents. Diluted net income (loss) per common share is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, convertible promissory notes, warrants and options to purchase common stock are considered potential dilutive common stock equivalents. For the three and six months ended June 30, 2015 and 2014, diluted net loss per common share was the same as basic net loss per common share since the effect of inclusion of potentially dilutive common stock equivalents would have an antidilutive effect due to the loss reported.

The following outstanding common stock equivalents were excluded from the computations of diluted net loss per common share for the periods presented as the effect of including such securities would be antidilutive:

Recent Accounting Pronouncements

In April 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2015-03, Simplifying the Presentation of Debt Issuance Costs. The update changes the presentation of debt issuance costs in financial statements. ASU 2015-03 requires an entity to present such costs in the balance sheet as a direct deduction from the related debt liability rather than an asset. Amortization of the costs will continue to be reported as interest expense. ASU 2015-03 is effective for annual reporting periods beginning after December 15, 2015 with early adoption permitted. The Company elected to adopt ASU 2015-03 as of June 30, 2015 and the adoption has no impact on the Company’s financial position or results of operations.

3. Cash, Cash Equivalents and Investments

The following is a summary of the Company’s cash, cash equivalents, and marketable securities investments:

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For the three and six months ended June 30, 2015, there were no realized gain and losses on available-for-sale securities. As of June 30, 2015, all of the available-for-sale investments had contractual maturities within 18 months. The Company does not intend to sell the investments that are in an unrealized loss position, and it is unlikely that the Company will be required to sell the investments before recovery of their amortized cost basis, which may be at maturity. The Company has determined that the gross unrealized losses on its available-for-sale investments as of June 30, 2015 were temporary in nature. All marketable securities with unrealized losses as of June 30, 2015 have been in a loss position for less than two months.

4. Fair Value of Financial Instruments

The Company records its financial assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the reporting date. The accounting guidance establishes a three-tiered hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value as follows:

The carrying values of certain assets and liabilities of the Company, such as cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable and accrued liabilities, approximate fair value due to their relatively short maturities. The carrying value of the Company’s short-term notes payable approximates their fair value as the terms of the borrowing are consistent with current market rates and the duration to maturity is short. The carrying value of the Company’s long-term notes payable approximates fair value because the interest rates approximate market rates that the Company could obtain for debt with similar terms and maturities.

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The following tables set forth the fair value of the Company’s financial instruments as of June 30, 2015 and December 31, 2014:

The Company’s freestanding warrant liability, which is measured and disclosed at fair value on a recurring basis, is classified within the Level 3 designation. There were no transfers between levels within the fair value hierarchy during the periods presented. The following table presents changes in financial instruments measured at fair value using Level 3 significant unobservable inputs:

5. Property and Equipment

The following summarizes the Company’s property and equipment as of June 30, 2015 and December 31, 2014:

Depreciation and amortization expense was approximately $0.6 million and $0.8 million for the three months ended June 30, 2015 and 2014, respectively, and $1.3 million and $1.5 million for the six months ended June 30, 2015 and 2014, respectively.

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6. Research and Development Collaboration and License Agreements

Collaboration Agreement with Novo Nordisk

Pursuant to the collaboration agreement with Novo Nordisk entered into in January 2014, the Company received a non-refundable upfront payment of $1.0 million. The Company evaluated the upfront payment for the license of its technology under the collaboration agreement and determined that the license does not have standalone value apart from the development support services. Accordingly, the license and the development support services are combined as one unit of accounting, and the upfront payment is recorded as deferred revenue in the consolidated balance sheet and recognized as revenue over the performance period that is consistent with the term of performance obligations under the specified feasibility study plan. As of June 30, 2015, all deferred revenue related to the non-refundable upfront payment has been recognized as license fees revenue. In July 2015, the Company announced that Novo Nordisk has notified the Company of its intention to discontinue the collaboration agreement (see Note 11 for discussion of subsequent event). For the three months ended June 30, 2015, no service revenue pursuant to the Novo Nordisk collaboration agreement was recognized. For the three months ended June 30, 2014, the Company recognized $0.2 million as service revenue pursuant to the Novo Nordisk collaboration agreement. For the six months ended June 30, 2015 and 2014, the Company recognized $46,000 and $0.5 million, respectively, as service revenue pursuant to the Novo Nordisk collaboration agreement.

Revenue from the reimbursement of research and development and out-of-pocket expenses is recognized as the related services were performed under the collaboration agreement on a time and material basis. The corresponding cost of service revenue is recorded as research and development expense in the consolidated statements of operations. The Company did not record cost of collaboration service revenue for the three months ended June 30, 2015. For the three months ended June 30, 2014, the Company recorded $0.1 million as cost of collaboration service revenue in connection with the Novo Nordisk collaboration agreement, and for the six months ended June 30, 2015 and 2014, the Company recorded $53,000 and $0.3 million, respectively, as cost of collaboration service revenue in connection with the Novo Nordisk collaboration agreement.

7. Debt Financing

Conversion of Related Parties Convertible Promissory Notes

On January 30, 2015, upon the closing of the Company’s initial public offering, the principal and all unpaid and accrued interest on the September 2013, and the February and December 2014 convertible promissory notes outstanding as of January 30, 2015, totaling $7.4 million, were automatically converted into an aggregate of 792,182 shares of common stock at a price equal to 85% of the initial public offering price, resulting in the liability for such notes being reclassified to permanent equity.

Senior Secured Term Loan with Hercules

In June 2014, the Company entered into a loan and security agreement with Hercules Technology Growth Capital, Inc. (Hercules) which provided the Company $4.0 million in debt financing. In June 2015, the Company entered into a first amendment to the loan and security agreement with Hercules to increase the aggregate principal amount of the loan to $15.0 million (the Hercules Term Loan). Upon the execution of the first amendment to the loan and security agreement, the Company used approximately $11.4 million of the Hercules Term Loan to prepay all amounts owing under the secured promissory note held by BMV Direct SOTRS LP, an affiliate of BioMed Realty Holdings, Inc.

The first amendment to the loan and security agreement with Hercules provides that the $15.0 million principal balance will be subject to a 12-month interest-only period beginning July 1, 2015, followed by equal monthly installment payments of principal and interest, with all outstanding amounts due and payable on December 1, 2018. The outstanding principal balance bears interest at a variable rate of the greater of (i) 7.95%, or (ii) 7.95% plus the prime rate as quoted in the Wall Street Journal minus 5.25%. In addition, the Company will be obligated to pay a $100,000 legacy end of term charge on the earlier of June 1, 2017 or the date the Company prepays the Hercules Term Loan and a $351,135 end of term charge on the earlier of loan maturity or at the date the Company prepays the Hercules Term

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Loan. The Company may prepay all, but not less than all, of the Hercules Term Loan subject to a prepayment charge of 1.0% of the then outstanding principal if prepaid prior to June 23, 2016, or 0.5% of the then outstanding principal if prepaid on or after June 23, 2016 but prior to June 23, 2017, with no prepayment charge if prepaid thereafter. The Hercules Term Loan is secured by a first priority security interest and lien in and to all of the Company’s tangible and intangible properties and assets, including intellectual properties.

The amended Hercules Term Loan has substantially different terms than the original loan and in accordance with ASC 470-50, Debt Modifications and Extinguishments, the original debt was considered extinguished. Accordingly, the Company wrote off the value of the original debt, including unamortized discount, as of the amendment date and recorded a liability for the new debt based on its fair value as determined using the income approach based on a discounted cash flow model. The transaction resulted in the Company recording a loss on debt extinguishment of $0.4 million on its consolidated statement of operations for the six months ended June 30, 2015.

In connection with the first amendment to the loan and security agreement with Hercules, the Company issued Hercules a warrant to purchase 40,705 shares of the Company’s common stock at an exercise price of $7.37 per share. The warrant was recorded at fair value on the date of issuance and treated as a debt discount which is being amortized to interest expense over the term of the loan using the effective interest method. (See Note 8 for a discussion on warrants to purchase common stock.)

In addition, the Company incurred legal and closing costs totaling $117,000, including an $85,000 upfront loan origination fee paid to Hercules and $32,000 of legal costs, in connection with the first amendment to the loan and security agreement with Hercules. These debt issuance costs have been recorded as a direct deduction from the related debt liability in accordance with ASU 2015-03 and are being amortized to interest expense over the term of the loan using the effective interest method. Upon early adoption of ASU 2015-03, the following is a summary of the Company’s long-term debt, net of unamortized debt discount and issuance costs, as of June 30, 2015:

Secured Financing with BMR

In connection with the recapitalization of the Company in April 2012, the Company renegotiated its lease agreement with its landlord, an affiliate of BioMed Realty Holdings, Inc. (BMR Holdings), to include reduced rent obligations. In connection with the rent reduction, the Company issued a secured promissory note (the BMR Note) for the principal amount of approximately $8.6 million to BMR Holdings, which was subsequently assigned to its affiliate BMV Direct SOTRS LP, and all previously accrued interest, unpaid rent, future rent obligations and other fees due to BMR Holdings were either rolled into the BMR Note or eliminated.

In June 2015, the Company terminated the BMR Note by prepaying the outstanding principal and all accrued interest as of June 25, 2015, totaling $11.4 million.

8. Warrants to Purchase Common Stock

In connection with the Company’s entry into the loan and security agreement with Hercules in June 2014, the Company issued Hercules a warrant to purchase $280,000 worth of the Company’s stock at a price per share equal to the lower of (i) lowest price per share of stock sold in the Company’s next round of private equity financing resulting in gross proceeds of at least $3.0 million prior to the closing of the Company’s initial public offering, and (ii) $8.84 per share. The warrant was initially recorded on the Company’s consolidated balance sheet at fair value

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on the date of issuance and treated as a debt discount that is being amortized to interest expense over the debt repayment period using the effective interest method. The warrant liability was revalued at each subsequent balance sheet date through December 31, 2014, with fair value changes recognized as warrant revaluation income (expense) in the accompanying condensed consolidated statements of operations. As a result of the pricing of the Company’s initial public offering on January 27, 2015, the settlement adjustment to the exercise price was effectively fixed, resulting in the warrant being exercisable for 31,674 shares (warrant amount of $280,000 divided by $8.84 per share) of the Company’s common stock. Accordingly, management concluded that the requirements for equity classification under ASC 815-40-25-10 have been met and effected a reclassification of the warrant liability of $0.3 million to equity. The warrant is exercisable at any time, in whole or in part, until five years from the date of the Company’s IPO. For the three and six months ended June 30, 2015, the Company recorded other income of zero and $48,000, respectively, related to the change in fair value of the warrant before equity reclassification, which was determined by using the Black-Scholes option valuation model with the following assumptions: expected term of 5.00 years; volatility of 89%; risk free interest rate of 1.32%; and no dividend yield.

In connection with the Company’s entry into the first amendment to loan and security agreement with Hercules in June 2015, the Company issued Hercules a warrant to purchase 40,705 shares of the Company’s common stock at an exercise price of $7.37 per share. Hercules can exercise its purchase right under the warrant, in whole or in part, at any time until June 23, 2020. The warrant was recorded at fair value on the date of issuance and treated as a debt discount that is being amortized to interest expense over the term of the loan using the effective interest method. The Company classified the warrant as an equity instrument in accordance with ASC 815-40-25-10 and recorded the fair value of the warrant of $212,000 to additional paid-in capital in its consolidated balance sheet. The warrant fair value was determined by using the Black-Scholes option valuation model with the following assumptions: expected term of 5.00 years; volatility of 89%; risk free interest rate of 1.73% and no dividend yield.

9. Commitments and Contingencies

The Company has an operating lease with BMR-34790 Ardentech Court LP, an affiliate of BMR Holdings, for its office, research and development, and manufacturing facilities in Fremont, California. The Company entered into a fifth amendment to the lease in April 2012 which extended the lease term through March 2019 and provided a reduction in annual rents due to a potential reduction of premises from a recapturable premises clause. In June 2015, the Company entered into a sixth amendment to the lease, pursuant to which the landlord’s option to recapture a specified portion of the leased premises (comprising approximately 29,348 square feet of the approximate total 55,588 square feet of leased premises) has been suspended and the Company has the option until December 31, 2015 to extend the term of the lease by an additional 38 months to June 1, 2022 and pay rent on the total leased premises beginning April 1, 2016 at the rates set forth in the sixth amendment.

The Company records rent expense under the lease on a straight-line basis over the term of the lease. The difference between the actual lease payments and the expense recognized under the lease, along with the unamortized tenant improvement allowances, resulted in a net deferred rent liability of $35,000 and $98,000 as of June 30, 2015 and December 31, 2014, respectively.

For the three months ended June 30, 2015 and 2014, rent expense under operating leases was $0.2 million and $0.2 million, respectively. For the six months ended June 30, 2015 and 2014, rent expense under operating leases was $0.4 million and $0.4 million, respectively.

As of June 30, 2015, future minimum payments under non-cancelable operating leases for each year ending December 31 are as follows:

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10. Stock-Based Compensation

The Company has reserved 1.4 million shares of common stock for issuance under the 2014 Equity and Incentive Plan (the 2014 Plan). In connection with the Company’s initial public offering of its common stock in January 2015, the Company’s board of directors terminated the Company’s 2012 Stock Incentive Plan (the 2012 Plan) effective as of January 27, 2015 and no further awards may be issued under the 2012 Plan. However, the awards outstanding under the 2012 Plan at January 27, 2015 continue to be governed by the terms of the 2012 Plan.

The following table summarizes options and awards activities and related information under the 2012 Plan and 2014 Plan combined:

The aggregate intrinsic values of options outstanding and exercisable, vested and expected to vest were calculated as the difference between the exercise price of the options and the closing market value of the Company’s common stock as reported on NASDAQ as of June 30, 2015.

The following summarizes the composition of stock options outstanding and exercisable as of June 30, 2015:

Stock-Based Compensation Expense

Total stock-based compensation expense recognized was as follows:

At June 30, 2015, the Company had $1.5 million of total unrecognized stock-based compensation, net of estimated forfeitures, related to outstanding stock options that will be recognized over a weighted-average period of 3.01 years.

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The Company uses the Black-Scholes model for valuing its options and awards granted to employees and non-employees. Stock-based compensation in connection with non-employee grants was immaterial for the three and six months ended June 30, 2015. The following table illustrates the input assumptions for employee stock option grants for the three and six months ended June 30, 2015:

11. Subsequent Event

On July 6, 2015, the Company announced that Novo Nordisk has notified the Company of its intention to discontinue the collaboration agreement dated January 31, 2014 related to development of a transdermal presentation of select Novo Nordisk glucagon-like peptide-1 (GLP-1) analogues. Upon the expected termination of the agreement, all technology rights licensed to Novo Nordisk related to the field of GLP-1 products will revert to the Company.

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The following discussion and analysis should be read in conjunction with our financial statements and accompanying notes included in this Quarterly Report on Form 10-Q and the financial statements and accompanying notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2014, filed with the Securities and Exchange Commission, or SEC, on March 26, 2015. This discussion contains “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. Such forward looking statements involve risks and uncertainties. We use words such as “may,” “will,” “expect,” “anticipate,” “estimate,” “intend,” “plan,” “predict,” “potential,” “believe,” “should” and similar expressions and references to future periods to identify forward-looking statements. Although we believe the expectations reflected in these forward-looking statements are reasonable, such statements are inherently subject to risk and we can give no assurances that our expectations will prove to be correct. These statements appearing throughout this Quarterly Report on Form 10-Q are statements regarding our intent, belief, or current expectations, primarily regarding our operations. You should not place undue reliance on these forward-looking statements, which apply only as of the date of this Quarterly Report on Form 10-Q. As a result of many factors, such as those set forth under “Risk Factors” under Item 1A of Part II below, and elsewhere in this Quarterly Report on Form 10-Q, our actual results may differ materially from those anticipated in these forward-looking statements. We undertake no obligation to update these forward-looking statements to reflect events or circumstances after the date of this report or to reflect actual outcomes.

Overview

We are a clinical stage specialty pharmaceutical company that has developed a proprietary transdermal microneedle patch system to deliver drug formulations through the skin for the treatment of a variety of indications. Our microneedle patch system offers rapid onset, consistent drug delivery, improved ease of use and room-temperature stability, benefits that we believe often are unavailable using oral formulations or injections. Our microneedle patch system has the potential to deliver numerous medications for a wide variety of indications in commercially attractive markets. By focusing our development efforts on the delivery of established molecules with known safety and efficacy and premium pricing, we plan to reduce our clinical and regulatory risk and development costs and accelerate our time to commercialization.

Our lead product candidates are Daily ZP-PTH, for the treatment of severe osteoporosis, ZP-Glucagon, for the treatment of severe hypoglycemia, and ZP-Triptan, for the treatment of migraine. These lead product candidates are generic drugs specifically formulated to be administered by our microneedle patch system, and are proposed treatments for indications in which we believe rapid onset, ease of use and stability offer particularly important therapeutic and practical advantages, and have patient populations that we believe will provide us with an attractive commercial opportunity.

Recent Developments

Initial Public Offering and Concurrent Private Placement

On January 30, 2015, we completed our initial public offering, or IPO, in which we sold 4,500,000 shares of our common stock at an IPO price of $11.00 per share. As a result of the IPO, we received gross proceeds of approximately $49.5 million, which resulted in net proceeds to us of approximately $44.2 million after deducting underwriting discounts and commissions and payment of offering expenses. On February 27, 2015, we sold an additional 110,000 shares of our common stock at the IPO price of $11.00 per share pursuant to the underwriters’ partial exercise of their over-allotment options, resulting in additional net proceeds of approximately $1.1 million after deducting underwriting discounts and commissions. In addition, in connection with the completion of our IPO, all of our outstanding related parties convertible notes were converted into shares of common stock.

Concurrently with the closing of our IPO, we issued and sold 1,363,636 shares of our common stock to Eli Lilly and Company, or Lilly, in a private placement pursuant to a common stock purchase agreement dated November 21, 2014 between us and Lilly, and received net proceeds of $14.5 million, after deducting a private placement fee.

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Senior Secured Term Loan with Hercules and Repayment of BMR Note

In June 2014, we entered into a loan and security agreement with Hercules Technology Growth Capital, Inc., or Hercules, which provided us $4.0 million in debt financing. In June 2015, we amended the loan and security agreement with Hercules to increase the aggregate principal amount of the loan, or the Hercules Term Loan, to $15.0 million. Upon the amendment of the loan and security agreement in June 2015, we used $11.4 million of the Hercules Term Loan to prepay all amounts owing under the April 2012 secured promissory note held by BMV Direct SOTRS LP, or the BMR Note, resulting in the cancellation of the BMR Note.

The loan and security agreement with Hercules, as amended, provides that the $15.0 million principal balance will be subject to a 12-month interest-only period beginning July 1, 2015, followed by equal monthly installment payments of principal and interest, with all outstanding amounts due and payable on December 1, 2018. The outstanding principal balance bears interest at a variable rate of the greater of (i) 7.95%, or (ii) 7.95% plus the prime rate as quoted in the Wall Street Journal minus 5.25%. In addition, we will be obligated to pay a $100,000 legacy end of term charge on the earlier of June 1, 2017 or the date we prepay the Hercules Term Loan and a $351,135 end of term charge on the earlier of loan maturity or at the date we prepay the Hercules Term Loan. We may prepay all, but not less than all, of the Hercules Term Loan subject to a prepayment charge of 1.0% of the then outstanding principal if prepaid prior to June 23, 2016, or 0.5% of the then outstanding principal if prepaid on or after June 23, 2016 but prior to June 23, 2017, with no prepayment charge if prepaid thereafter. The Hercules Term Loan is secured by a first priority security interest and lien in and to all of our tangible and intangible properties and assets, including intellectual properties.

In connection with the amendment of the loan and security agreement with Hercules in June 2015, we issued Hercules a warrant to purchase 40,705 shares of our common stock at an exercise price of $7.37 per share.

Daily ZP-PTH – our osteoporosis opportunity in collaboration with Eli Lilly and Company

Our product candidate Daily ZP-PTH is our proprietary formulation of teriparatide, a synthetic form of parathyroid hormone, which we refer to as PTH 1-34, or PTH, which regulates serum calcium, to be administered daily for the treatment of severe osteoporosis. Osteoporosis is a disease primarily affecting post-menopausal women that is characterized by low bone mineral and structural deterioration of bone tissue, which can lead to an increase in bone fractures. In November 2014, we entered into a strategic partnership and license agreement with Lilly to develop one or more ZP-PTH microneedle patch products, with the initial product candidate being Daily ZP-PTH. Under the terms of the agreement, we have granted to Lilly an exclusive, worldwide license to commercialize ZP-PTH in all dosing frequencies, including Daily ZP-PTH. We intend to conduct our Phase 3 clinical trial of Daily ZP-PTH after having additional meetings with the United States Food and Drug Administration, or FDA, and regulatory authorities in Japan to discuss our development plan for Daily ZP-PTH, and expect to complete these discussions by the end of 2015. Currently, we are utilizing our manufacturing operations to actively produce Daily ZP-PTH clinical trial materials for the Phase 3 clinical trial, which we expect to commence in the first quarter of 2016.

ZP-Glucagon – our hypoglycemia opportunity

Our product candidate ZP-Glucagon is our proprietary formulation of glucagon, a hormone that raises blood glucose levels, intended for the emergency rescue of patients suffering from life-threatening, severe hypoglycemia. Severe hypoglycemia is a complication of diabetes treatment, often caused by insulin overdose, characterized by a very low level of blood glucose that can lead to loss of consciousness, seizure, coma and death.

Current Phase 2 clinical trial

We are currently conducting a Phase 2 clinical trial of ZP-Glucagon in Australia to evaluate the performance of ZP-Glucagon in type 1 diabetic patients at 0.5 milligram, or mg, and 1.0 mg doses, with induction of hypoglycemia, in comparison to comparable doses of glucagon administered by intramuscular injection. This Phase 2 clinical trial is investigating the safety and efficacy of ZP-Glucagon in the treatment of insulin-induced hypoglycemia in diabetic patients (as opposed to healthy volunteers, as used in our Phase 1 trial). Based on the higher bioavailability results –

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bioavailability is the degree and rate at which an administered dose of unchanged drug is absorbed into the body and reaches the blood – from our Phase 1 trial of ZP-Glucagon, it is possible that we could have a therapeutic patch dose with a coated amount less than 1 mg. Therefore, in our Phase 2 trial, we are testing both a single patch dose of 0.5 mg and two patches of 0.5 mg (total dose of 1.0 mg) compared to 0.5 mg and 1.0 mg of intramuscular injection. We expect this clinical trial to inform our target dose for, and give us guidance to adequately power, a pivotal Phase 3 clinical trial. We commenced, or treated the first patient in, this Phase 2 clinical trial in January 2015. Enrollment in the Phase 2 clinical trial was slower than expected due to the requirement of hypoglycemic induction in diabetics. To mitigate this slower than expected enrollment, we added an additional site to the study, and expect to complete this Phase 2 clinical trial in the third quarter of 2015.

Planned pivotal Phase 3 clinical trial

We expect to commence our planned Phase 3 clinical trial upon successful completion of our Phase 2 clinical trial and filing of an investigational new drug application, or IND, with the FDA.

ZP-Triptan – our migraine opportunity

Our product candidate ZP-Triptan is our proprietary formulation of zolmitriptan, one of a class of serotonin receptor agonists known as triptans, used for the treatment of migraine. Migraine is a debilitating neurological disease, symptoms of which include moderate to severe headache pain, nausea and vomiting, and abnormal sensitivity to light and sound.

Planned Phase 1 clinical trial

Our planned Phase 1 clinical trial of ZP-Triptan will be conducted in Australia and designed to compare the pharmacokinetic and safety / tolerability profiles of escalated patch doses of zolmitriptan in healthy volunteers to those of one subcutaneous injection of sumatriptan, a synthetic triptan, and to those on conventional release zolmitriptan tablets used for the treatment of migraine. We intend to complete this Phase 1 clinical trial by the end of the fourth quarter of 2015, using active injectable and oral zolmitriptan as comparators to assess the relative speed of onset of ZP-Triptan compared to injectable and oral formulations. The results of the ZP-Triptan Phase 1 clinical trial will guide the dose selection of our planned Phase 2 clinical trial of ZP-Triptan.

Planned Phase 2 and Phase 3 clinical trials

Our Phase 2 clinical trial will be designed to assess the safety and efficacy of ZP-Triptan patches in the acute treatment of migraine in adults. This study is expected to be a randomized, controlled double-blind, parallel-group study with 200 migraine patients each of whom would be administered a ZP-Triptan patch coated with zolmitriptan, a placebo patch and a subcutaneous injection of sumatriptan. We expect to discuss our planned Phase 2 and Phase 3 clinical trials of ZP-Triptan with the FDA after the completion of our planned Phase 1 clinical trial.

Type 2 diabetes – our collaboration with Novo Nordisk

In July 2015, we announced that Novo Nordisk A/S, or Novo Nordisk, has notified us of its intention to discontinue the collaboration, development and license agreement that we entered into with Novo Nordisk in January 2014 related to development of a transdermal presentation of select Novo Nordisk glucagon-like peptide-1 (GLP-1) analogues, to be administered once weekly using our microneedle patch system for the treatment of type 2 diabetes. We were notified that Novo Nordisk’s decision was related to a strategic prioritization of Novo Nordisk’s research portfolio despite continued progress during the collaboration period. Upon the expected termination of the collaboration agreement, all technology rights licensed to Novo Nordisk related to the field of GLP-1 products will revert to us. We received a non-refundable upfront payment of $1 million upon entering into the collaboration agreement in January 2014.

Critical Accounting Policies and Significant Judgments and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States, or U.S. GAAP. The preparation of our financial statements in conformity with U.S. GAAP requires our management to make estimates and assumptions that affect the amounts and disclosures reported in the financial statements and accompanying notes. Actual results could differ materially from those

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estimates. Our management believes judgment is involved in determining revenue recognition, the fair value-based measurement of stock-based compensation, accruals and warrant valuations. Our management evaluates estimates and assumptions as facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the consolidated financial statements. If our assumptions change, we may need to revise our estimates, or take other corrective actions, either of which may also have a material adverse effect on our statements of operations, liquidity and financial condition.

We are an “emerging growth company” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act. Emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have irrevocably elected not to avail ourselves of this exemption from new or revised accounting standards, and, therefore, will be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies.

There have been no significant and material changes in our critical accounting policies and use of estimates during the six months ended June 30, 2015, as compared to those disclosed in “Part II, Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Significant Judgments and Estimates” in our Annual Report on Form 10-K for the year ended December 31, 2014 filed with the Securities and Exchange Commission, except for the following update:

Investments in Marketable Securities

We classify our investments in marketable securities as available-for-sale. Investments with maturities between three and twelve (12) months are considered short-term investments. Investments with maturities greater than 12 months are considered long-term investments. Our investments classified as available-for-sale are recorded at fair value based upon quoted market prices at period end. Unrealized gains and losses that are deemed temporary in nature are recorded in accumulated other comprehensive income (loss) as a separate component of stockholders’ equity (deficit). A decline in the fair value of any security below cost that is deemed other than temporary results in a charge to earnings and the corresponding establishment of a new cost basis for the security. Premiums and discounts are amortized (accreted) over the life of the corresponding security as an adjustment to its yield. Dividend and interest income are recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of investments sold.

Financial Overview

As of June 30, 2015, we had an accumulated deficit of approximately $150.6 million. We have incurred significant losses and expect to incur significant and increasing losses in the foreseeable future as we advance our product candidates into later stages of development and, if approved, commercialization. We cannot assure you that we will receive additional collaboration revenue in the future, whether pursuant to our agreement with Lilly or any other partnership that we might pursue.

We expect our research and development expenses and manufacturing expenses related to clinical trials to increase significantly as we continue to advance our product candidates through clinical development. Because of the numerous risks and uncertainties associated with our technology and drug development, we are unable to predict the timing or amount of expenses incurred or when, or if, we will be able to achieve profitability.

Revenue

Our revenue to date has been generated primarily from non-refundable license fee payments and reimbursements for research and development expenses under our prior collaboration and license agreements with Asahi Kasei Pharma Corporation, or Asahi, and our collaboration, development and license agreement with Novo Nordisk. Through June 30, 2015, we had received a non-refundable upfront license fee payment of $1.0 million from Novo Nordisk under the collaboration, development and license agreement, which was recorded as deferred revenue. Based on Novo Nordisk’s notification to us in July 2015 of its intention to discontinue the collaboration agreement, we have recognized as of June 30, 2015 the remaining deferred revenue under this collaboration agreement. Reimbursements from Novo Nordisk for development support services and out-of-pocket expenses in

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connection with the collaboration agreement were recognized as service revenue when service was rendered and cost of material was incurred. Through June 30, 2014, we had received an aggregate of $16.5 million under the license agreement with Asahi, which was terminated in January 2014.

Cost of license fees revenue

We are a party to an intellectual property license agreement dated October 5, 2006, as amended, with ALZA Corporation, or ALZA, under which we license certain patents and patent applications from ALZA on an exclusive basis worldwide. Cost of license fees revenue represents our payment obligations to ALZA under the intellectual property license agreement. Under the terms of the agreement, we are obligated to pay ALZA royalties on sales of products by us that would otherwise infringe one of the licensed patents or that is developed by us based on certain ALZA know-how or inventions, and to pay ALZA royalties on sales by our sublicensees of such products. We are also obligated to pay ALZA a percentage of non-royalty revenue, defined as upfront payments, milestone payments and all other consideration (other than royalties), that we receive from our sublicensees on third party products where no generic equivalent is available to the public. Pursuant to the agreement with ALZA, we made a $0.1 million payment to ALZA during the six months ended June 30, 2014 for the upfront license fee we received upon execution of the collaboration agreement with Novo Nordisk in January 2014.

Research and development expenses

Research and development expenses represent costs incurred to conduct research, such as the discovery and development of our proprietary product candidates. We recognize all research and development costs as they are incurred.

Research and development expenses consist of:

We expect our research and development expenses to substantially increase as we plan and initiate Phase 3 development of our Daily ZP-PTH product candidate, plan further development of our ZP-Glucagon product candidate, and initiate Phase 1 and Phase 2 trials of our ZP-Triptan product candidate, and as we begin to enhance our manufacturing facilities in preparation of commercial launch.

General and administrative expenses

General and administrative expenses consist principally of personnel-related costs, professional fees for legal, consulting, audit and tax services, rent and other general operating expenses not otherwise included in research and development. As a newly public company, we expect our general and administrative expenses to increase as we will need to invest significant resources to comply with evolving laws, regulations and standards, including the implementation of effective internal controls over financial reporting and compliance with the Sarbanes-Oxley Act of 2002.

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Other income (expense)

Interest expense, net. Interest expense, net of interest income, consists primarily of interest costs related to our short-term borrowings and long-term debt and the amortization of debt discount and issuance costs. Interest expense for the six months ended June 30, 2015 consists of accrued interest on the related parties convertible promissory notes, which was converted to equity upon the closing of our IPO, accrued interest on the BMR Note, which was repaid in full in June 2015, as well as accrued and paid interest related to the Hercules Term Loan and the related amortization of debt discount and issuance costs. Interest expense for the six months ended June 30, 2014 consists of accrued interest on the related parties convertible promissory notes, accrued interest on the BMR Note, and accrued interest related to the Hercules Term Loan, as well as related amortization of debt discount and issuance costs.

Other income (expense). Other income or expense consists of certain miscellaneous income or expenses that are not included in other categories of the consolidated statement of operations.

Warrant revaluation. Warrant revaluation income or expense resulted from the re-measurement of our common stock warrant liability issued in connection with the Hercules Term Loan. We record changes to the fair value of the common stock warrants as income or loss at each balance sheet date until they are exercised, reclassified, expired or converted into shares of our common stock. For the six months ended June 30, 2015, we recorded an income of $48,000 reflecting the change in fair value of the warrant liability before the liability was reclassified to equity.

Gain on debt forgiveness. In March 2014 and pursuant to the provisions of our joint venture termination agreement with Asahi, we recorded a one-time gain of $0.5 million on debt forgiveness resulting from the cancellation of ZP Group LLC’s revolving line of credit with Asahi Kasei Pharma USA.

Loss on debt extinguishment. Loss on debt extinguishment was related to the restructuring and consolidation of our outstanding debt in June 2015. In June 2015, we amended our loan and security agreement with Hercules to increase the aggregate principal amount of the loan to $15.0 million. The amended Hercules Term Loan has substantially different terms than the original loan and in accordance with U.S. GAAP, the original debt was considered extinguished. We accounted for the extinguishment based on the relative fair value of the loan and recorded a loss on debt extinguishment of $0.4 million.

Results of Operations

Comparison of the three months ended June 30, 2015 and 2014

Revenue

Total revenue decreased $0.4 million, or 81%, for the three months ended June 30, 2015 as compared to the same period in 2014. The decrease was primarily due to a reduction in license fee revenue and related development support service revenue upon the completion of the feasibility study under our collaboration agreement with Novo Nordisk.

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Research and development expenses

Research and development expenses increased $2.2 million, or 81%, for the three months ended June 30, 2015 as compared to the same period in 2014. The increase was primarily due to higher production costs related to the manufacturing of clinical trial materials for our Daily ZP-PTH, ZP-Glucagon and ZP-Triptan product candidates.

General and administrative expenses

General and administrative expenses increased $0.6 million, or 57%, for the three months ended June 30, 2015 as compared to the same period in 2014. The increase was primarily due to approximately $0.3 million related to additional general and administrative personnel costs in support of our expanded research and development operations and approximately $0.3 million related to expenses associated with being a public company.

Other income (expense)

Interest expense, net, increased $60,000, or 16%, for the three months ended June 30, 2015 as compared to the same period in 2014. The increase was primarily due to the incremental interest expense incurred in connection with our term loan with Hercules.

Other expense decreased $0.1 million, or 97%, for the three months ended June 30, 2015 as compared to the same period in 2014. The decrease was primarily related to the fair value of the 31,250 shares of common stock that we issued to BMV Direct SOTRS LP in June 2014 as an inducement for its subordination of the BMR Note to the Hercules Term Loan.

Loss on debt extinguishment was related to the restructuring and consolidation of our outstanding debt in June 2015. The amended Hercules Term Loan has substantially different terms than the original loan, and the original debt was considered extinguished. We accounted for the extinguishment based on the relative fair value of the loan and recorded a loss on debt extinguishment of $0.4 million in the three months ended June 30, 2015.

Comparison of the six months ended June 30, 2015 and 2014

Revenue

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Total revenue decreased $1.8 million, or 85%, for the six months ended June 30, 2015 as compared to the same period in 2014. The decrease was primarily due to the $1.1 million of contract revenue we earned in 2014 under our license agreement with Asahi that did not recur in 2015 as a result of the termination of the license agreement, and an approximately $0.7 million reduction in license fee revenue and related development support service revenue upon completion of the feasibility study under our collaboration agreement with Novo Nordisk.

Cost of license fees revenue

There was no cost of license fees revenue in the six months ended June 30, 2015. Cost of license fees revenue was $0.1 million for the six months ended June 30, 2014 due to the royalty payment to ALZA attributable to our receipt of a $1.0 million license fee from Novo Nordisk upon execution of the collaboration and license agreement in January 2014.

Research and development expenses

Research and development expenses increased $2.4 million, or 43%, for the six months ended June 30, 2015 as compared to the same period in 2014. The increase was primarily due to higher production costs related to the manufacturing of clinical trial materials for our Daily ZP-PTH, ZP-Glucagon and ZP-Triptan product candidates.

General and administrative expenses

General and administrative expenses increased $0.8 million, or 33%, for the six months ended June 30, 2015 as compared to the same period in 2014. The increase was primarily due to approximately $0.3 million related to additional general and administrative personnel costs in support of our expanded research and development operations and approximately $0.4 million related to expenses associated with being a public company.

Other income (expense)

Interest expense, net, increased $0.3 million, or 37%, for the six months ended June 30, 2015 as compared to the same period in 2014. The increase was primarily due to the incremental interest expense incurred in connection with the Hercules Term Loan.

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Other expense decreased $0.2 million for the six months ended June 30, 2015 as compared to the same period in 2014. The decrease was primarily related to the fair value of the 31,250 shares of common stock that we issued to BMV Direct SOTRS LP in June 2014 as an inducement for its subordination of the BMR Note to the Hercules Term Loan.

Warrant revaluation income for the six months ended June 30, 2015 resulted from the re-measurement of the fair value of our common stock warrant liability issued in connection with the Hercules term loan in June 2014.

The gain on debt forgiveness of $0.5 million was due to a one-time transaction in March 2014 resulting from the cancellation of ZP Group LLC’s revolving line of credit with Asahi Kasei Pharma USA, pursuant to the provisions of our joint venture termination agreement with Asahi.

Loss on debt extinguishment was related to the restructuring and consolidation of our outstanding debt in June 2015. The amended Hercules Term Loan has substantially different terms than the original loan and the original debt was considered extinguished. We accounted for the extinguishment based on the relative fair value of the loan and recorded a loss on debt extinguishment of $0.4 million in the six months ended June 30, 2015.

Liquidity and Capital Resources

Since our inception in October 2006, we have funded our operations primarily through private placements of our preferred stock, secured and unsecured borrowings from private investors, bank credit facilities, licensing and service revenue from our license and collaboration agreements, and our initial public offering. We have incurred recurring operating losses and negative cash flows from operating activities since inception, and as of June 30, 2015, had an accumulated deficit of $150.6 million. We expect to incur additional losses in the future to conduct research and development on our product candidates and to conduct pre-commercialization manufacturing activities.

On January 30, 2015, we completed our initial public offering, in which we issued 4,500,000 shares of our common stock at a price of $11.00 per share, resulting in net proceeds of approximately $44.2 million, after deducting underwriting discounts and commissions and payment of offering expenses. Concurrent with the closing of our initial public offering on January 30, 2015, we issued and sold an additional 1,363,636 shares of our common stock to Lilly in a separate private placement for net proceeds of $14.5 million, after deducting a private placement fee. On February 27, 2015, we issued and sold an additional 110,000 shares of our common stock at a price of $11.00 per share pursuant to the partial exercise of the overallotment option granted to the underwriters in our initial public offering, resulting in net proceeds to us of approximately $1.1 million after deducting underwriting discounts and commissions. As of June 30, 2015, we had approximately $50.6 million in cash, cash equivalents and marketable securities.

We believe our existing cash, cash equivalents and marketable securities will be sufficient to sustain operations for at least the next 12 months based on our existing business plan and enable us to complete certain of our clinical trials as currently projected.

We will continue to require additional financing to develop our product candidates and fund operating losses. We will seek funds through equity or debt financings, collaborative or other arrangements with corporate sources, or through other sources of financing. Adequate additional funding may not be available to us on acceptable terms or at all. Our failure to raise capital as and when needed could have a negative impact on our financial condition and our ability to pursue our business strategies. We anticipate that we will need to raise substantial additional capital, the requirements of which will depend on many factors, including:

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If we are unable to raise additional funds when needed, we may be required to delay, reduce, or terminate some or all of our development programs and clinical trials. We may also be required to sell or license to others technologies or clinical product candidates or programs that we would prefer to develop and commercialize ourselves.

The following table shows a summary of our cash flows for the six-month periods ended June 30, 2015 and 2014:

Operating Cash Flow. Net cash used in operating activities was $11.0 million and $5.9 million for the six months ended June 30, 2015 and 2014, respectively. Net cash used during the first six months of 2015 was primarily the result of clinical and non-clinical development costs, personnel costs related to the hiring of key personnel with critical manufacturing know-how to ramp up our production of clinical trial materials in preparation of our planned Phase 2 and 3 clinical trials for our ZP-PTH, ZP-Glucagon and ZP-Triptan clinical programs, professional fees and administrative expenses incurred in the course of our continuing operations. Net cash used during the first six months of 2014 was primarily the result of personnel-related costs, clinical trial costs, professional fees and administrative expenses, partially offset by the collection of our receivables from Asahi of approximately $3.4 million as final settlement of our joint venture in ZP Group LLC.

Investing Cash Flow. Net cash used in investing activities was $42.7 million and $0.7 million for the six months ended June 30, 2015 and 2014, respectively. Net cash used in investing activities during the first six months of 2015 was primarily due to the purchase of marketable securities for investment. During the first six months of 2014, net cash used in investing activities included the purchase of manufacturing equipment to support the clinical trial material production of our transdermal microneedle patch.

Financing Cash Flow. Net cash provided by financing activities was $60.5 million and $6.4 million for the six months ended June 30, 2015 and 2014, respectively. Net cash generated by financing activities during first six months of 2015 included approximately $60.3 million of net proceeds from our initial public offering of securities and concurrent private placement with Lilly. Net cash generated from financing activities in first six months of 2014 was provided through $3.9 million of net proceeds from our debt financing with Hercules and $2.5 million from the issuance of convertible promissory notes to related parties.

Contractual Obligations and Commitments

Our main contractual obligations as of June 30, 2015 consist of operating leases of $2.4 million and long-term debt obligations of $18.2 million (including end of term payments and periodic interest payments). Operating leases represent our future minimum rental commitments under our operating leases. Long-term debt obligations include our secured term loan facility with Hercules. Our contractual obligations decreased by approximately $7.2 million

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from December 31, 2014 reflecting the conversion of our related parties convertible promissory notes to permanent equity upon the closing of our initial public offering on January 30, 2015 and the payment of all of the then outstanding principal and accrued interest on the BMR Note in June 2015.

Off-Balance Sheet Arrangements

We currently have no off-balance sheet arrangements, such as structured finance, special purpose entities or variable interest entities.

Foreign Currency Risk

Our business is primarily conducted in U.S. dollars except for our agreement with our contract research organization to conduct clinical trials in Australia and Canada. Due to the fact that both Australian and Canadian dollars are highly traded currencies and given the stable and sovereign economies of these countries, we do not believe that our foreign exchange risk is material. However, if we should increase our business activities that require the use of foreign currencies, we may incur losses if the Australian or Canadian dollars and other such currencies strengthen against the U.S. dollar.

Interest Rate Risk

As of June 30, 2015, we had cash, cash equivalents and marketable securities of $50.6 million, consisting of bank deposits, money market funds, corporate bonds, U.S. government agency bonds and commercial paper. Such interest-earning instruments carry a degree of interest rate risk.

We invest any surplus funds in accordance with a policy approved by our board of directors which specifies the categories, allocations, and ratings of securities we may consider for investment. The primary objectives of our investment policy are to preserve principal and maintain proper liquidity to meet our operating requirements. Our investment policy also specifies credit quality standards for our investments and limits the amount of credit exposure to any single issue, issuer or type of investment.

We do not enter into investments for trading or speculative purposes and have not used any derivative financial instruments to manage our interest rate risk exposure. We have not been exposed nor do we anticipate being exposed to material risks due to changes in interest rates. The average duration of our available-for-sale marketable securities held as of June 30, 2015, was less than 17 months. Due to the short-term nature of these financial instruments, we believe there is no material exposure to interest rate risk, and/or credit risk, arising from our portfolio of marketable securities.

Our outstanding debt obligation carries a variable interest rate equal to the greater of (i) 7.95%, or (ii) 7.95% plus the prime rate as quoted in the Wall Street Journal minus 5.25%. Accordingly, our debt obligation will increase if and as the interest rate increases.

Credit Risk

Financial instruments that potentially subject us to concentration of credit risk consist of cash and cash equivalents and accounts receivable. We place our cash and cash equivalents with a high credit quality financial institution. Deposits held with banks may exceed the amount of insurance provided on such deposits. We have not experienced any losses on our deposits of cash and cash equivalents since inception. As of June 30, 2015, our receivables consisted of an immaterial amount. We do not believe that our credit risk is material.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of June 30, 2015. The term “disclosure controls and procedures,” as defined in Rule 13a-15(e) under the Exchange Act of 1934, as amended, or the Exchange Act, means controls and other procedures that are designed to ensure that information required to be disclosed by us in the

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reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including our principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Based on the evaluation of our disclosure controls and procedures as of June 30, 2015, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures were not effective at the reasonable assurance level because of the material weakness in internal control over financial reporting described below.

As previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2014, our management previously determined that as of December 31, 2014 we had a material weakness in our internal control over financial reporting due to the fact that we did not have the appropriate resources with the appropriate level of experience and technical expertise to provide oversight over the timely preparation and review of schedules necessary for the preparation of our financial statements and to make certain U.S. GAAP accounting judgments. Notwithstanding the existence of this material weakness, our management has concluded that our condensed consolidated financial statements included in this Quarterly Report on Form 10-Q present fairly, in all material respects, our financial position, results of operations and cash flows in accordance with U.S. GAAP for each of the periods presented.

Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Changes in Internal Control over Financial Reporting

As previously disclosed in connection with the material weakness referenced above, we began implementing a number of measures to remediate the material weakness and strengthen our internal control over financial reporting. Management has implemented, or continued to implement, the following measures during the three- and six-month periods ended June 30, 2015:

Except for these remedial actions, there was no change in our internal control over financial reporting identified in connection with the evaluation required by paragraph (d) of Rule 13a-15 under the Exchange Act that occurred during the three months ended June 30, 2015 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

We are not party to any material pending legal proceedings. However, we may from time to time become involved in litigation relating to claims arising in the ordinary course of our business.

Investing in our common stock involves a high degree of risk. Our Annual Report on Form 10-K for the year ended December 31, 2014 includes a detailed discussion of our risk factors under the heading “Part I, Item 1A—Risk Factors.” There have been no material changes from such risk factors during the three- and six-month periods ended June 30, 2015. You should consider carefully the risk factors discussed in our Annual Report on Form 10-K for the year ended December 31, 2014 and all other information contained in or incorporated by reference in this Quarterly Report on Form 10-Q before making an investment decision. If any of the risks discussed in the Annual Report on Form 10-K actually occur, they may materially harm our business, financial condition, operating results, cash flows or growth prospects. As a result, the market price of our common stock could decline, and you could lose all or part of your investment. Additional risks and uncertainties that are not yet identified or that we think are immaterial may also materially harm our business, financial condition, operating results, cash flows or growth prospects and could result in a complete loss of your investment.

Unregistered Sales of Equity Securities

On June 23, 2015, we issued a Warrant Agreement to Hercules Technology Growth Capital, Inc., or Hercules, pursuant to which Hercules has the right to purchase 40,705 shares of our common stock from us at an exercise price of $7.37 per share. Hercules can exercise its purchase right under the Warrant Agreement, in whole or in part, at any time until June 23, 2020. We issued the Warrant Agreement to Hercules in connection with our entry into a First Amendment to Loan and Security Agreement with Hercules on June 23, 2015, pursuant to which the principal amount of the term loan made available to us by Hercules was increased to $15.0 million and the term loan interest rate was reduced to a per annum rate equal to the greater of (i) 7.95% plus the “prime rate” as reported in The Wall Street Journal minus 5.25% and (ii) 7.95%. The interest rate floats, and will be determined based on changes to the prime rate. We are required to pay interest on the outstanding principal balance of the term loan on a monthly basis beginning July 1, 2015, with repayment of the $15.0 million principal balance amortized in equal monthly installments of principal and interest beginning on July 1, 2016, with all outstanding amounts due and payable on December 1, 2018.

The issuance of the Warrant Agreement to Hercules was deemed to be exempt from registration under the Securities Act of 1933, as amended, or the Securities Act, in reliance upon Section 4(a)(2) of the Securities Act (or Regulation D promulgated thereunder) as a transaction by an issuer not involving any public offering. Hercules represented and warranted to us in the Warrant Agreement that Hercules is acquiring the right to purchase common stock pursuant to the Warrant Agreement for investment and not with a view to the sale or distribution of any part thereof, that Hercules has no present intention of selling or engaging in any public distribution of such rights or the common stock except pursuant to an effective registration statement or an exemption from the registration requirements of the Securities Act, and that Hercules is an “accredited investor” within the meaning of Regulation D promulgated under the Securities Act. We reasonably believed immediately prior to our issuance of the Warrant Agreement to Hercules that Hercules was acquiring the right to purchase common stock pursuant to the Warrant Agreement for its own account and not with a view to the sale or distribution of any part thereof, that Hercules had no present intention of selling or engaging in any public distribution of such rights or the common stock except pursuant to an effective registration statement or an exemption from the registration requirements of the Securities Act, and that Hercules was an accredited investor.

Use of Proceeds

On January 30, 2015, we consummated the closing of our initial public offering of common stock pursuant to our Registration Statement on Form S-1 (File No. 333-196983), as amended, which was declared effective by the

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Securities and Exchange Commission, or SEC, on January 26, 2015. Through June 30, 2015, we used approximately $3.5 million of the net offering proceeds to fund continued advancement of our ZP-Glucagon, Daily ZP-PTH, and ZP-Triptan product candidates, approximately $0.8 million to service our debt obligation with Hercules, approximately $0.5 million to expand and enhance our manufacturing capabilities, and approximately $6.5 million for working capital and other general corporate purposes. There has been no material change in the expected use of the net proceeds from our initial public offering as described in the final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act on January 27, 2015.

Not Applicable.

Not Applicable.

Not Applicable.

A list of exhibits is set forth on the Exhibit Index immediately following the signature page of this Quarterly Report on Form 10- Q, and is incorporated herein by reference.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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EXHIBIT INDEX