10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

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

For the quarterly period ended June 30, 2015

OR

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

For the transition period from            to            .

Commission File No. 0-26770

NOVAVAX, INC.

(Exact name of registrant as specified in its charter)

Delaware	22-2816046
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
20 Firstfield Road, Gaithersburg, MD	20878
(Address of principal executive offices)	(Zip code)

(240) 268-2000

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 a 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):

Large accelerated filer x	Accelerated filer  ¨	Non-accelerated filer  ¨	Smaller reporting company ¨
		(Do not check if a smaller reporting company)

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

The number of shares outstanding of the Registrant’s Common Stock, $0.01 par value, was 269,640,511 as of July 31, 2015.

NOVAVAX, INC.

TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION		Page No.
Item 1.	Consolidated Financial Statements
	Consolidated Balance Sheets as of June 30, 2015 (unaudited) and December 31, 2014	1
	Unaudited Consolidated Statements of Operations and Unaudited Consolidated Statements of Comprehensive Loss for the three and six months ended June 30, 2015 and 2014	2
	Unaudited Consolidated Statements of Cash Flows for the six months ended June 30, 2015 and 2014	3
	Notes to the Consolidated Financial Statements (unaudited)	4
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	16
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	31
Item 4.	Controls and Procedures	32
PART II. OTHER INFORMATION
Item 1A.	Risk Factors	32
Item 6.	Exhibits	33
SIGNATURES		34

i

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

NOVAVAX, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share information)

	June 30,			December 31,
	2015			2014
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	167,384		$	32,335
Marketable securities		147,554			135,721
Restricted cash		—			297
Accounts receivable – billed		2,342			7,510
Account receivable – unbilled		2,498			3,100
Prepaid expenses and other current assets		13,201			9,195
Total current assets		332,979			188,158
Property and equipment, net		26,134			19,737
Intangible assets, net		11,360			12,577
Goodwill		53,307			54,612
Other non-current assets		918			918
Total assets	$	424,698		$	276,002
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	7,117		$	12,908
Accrued expenses		16,522			19,397
Current portion of notes payable		532			603
Deferred rent		1,187			1,138
Other current liabilities		1,695			70
Total current liabilities		27,053			34,116
Deferred revenue		2,500			2,500
Non-current portion of notes payable		149			395
Deferred rent		7,320			7,734
Other non-current liabilities		73			1,639
Total liabilities		37,095			46,384
Commitments and contingences		—			—
Stockholders’ equity:
Preferred stock, $0.01 par value, 2,000,000 shares authorized; no shares issued and outstanding as of June 30, 2015 and December 31, 2014, respectively		—			—
Common stock, $0.01 par value, 600,000,000 shares authorized at June 30, 2015 and 300,000,000 shares authorized at December 31, 2014; 269,095,405 shares issued and 268,639,975 shares outstanding at June 30, 2015 and 239,287,294 shares issued and 238,831,864 shares outstanding at December 31, 2014		2,691			2,393
Additional paid-in capital		934,176			729,373
Accumulated deficit		(538,104	)		(493,093	)
Treasury stock, 455,430 shares, cost basis at both June 30, 2015 and December 31, 2014		(2,450	)		(2,450	)
Accumulated other comprehensive loss		(8,710	)		(6,605	)
Total stockholders’ equity		387,603			229,618
Total liabilities and stockholders’ equity	$	424,698		$	276,002

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

1

NOVAVAX, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share information)

(unaudited)

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2015			2014			2015			2014
Revenue:
Government contracts	$	13,720		$	7,241		$	22,966		$	12,713
Research and development collaborations		276			1,018			906			3,008
Total revenue		13,996			8,259			23,872			15,721
Costs and expenses:
Cost of government contracts revenue		2,687			5,102			5,307			8,123
Research and development		25,042			15,202			50,769			29,720
General and administrative		7,088			5,806			12,931			10,114
Total costs and expenses		34,817			26,110			69,007			47,957
Loss from operations		(20,821	)		(17,851	)		(45,135	)		(32,236	)
Other income (expense):
Investment income		134			20			256			32
Interest expense		(26	)		(51	)		(62	)		(103	)
Other income (expense)		72			18			(70	)		18
Realized gains on marketable securities		―			―			―			615
Net loss	$	(20,641	)	$	(17,864	)	$	(45,011	)	$	(31,674	)
Basic and diluted net loss per share	$	(0.08	)	$	(0.08	)	$	(0.18	)	$	(0.15	)
Basic and diluted weighted average number of common shares outstanding		268,083			217,178			254,727			213,075

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(in thousands)

(unaudited)

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2015			2014			2015			2014
Net loss	$	(20,641	)	$	(17,864	)	$	(45,011	)	$	(31,674	)
Other comprehensive income (loss):
Net unrealized gains (losses) on investments available-for-sale		4			27			47			(1	)
Reclassification adjustment for gains included in net loss		―			―			―			(615	)
Foreign currency translation adjustment		1,042			(1,410	)		(2,152	)		(1,543	)
Other comprehensive income (loss)		1,046			(1,383	)		(2,105	)		(2,159	)
Comprehensive loss	$	(19,595	)	$	(19,247	)	$	(47,116	)	$	(33,833	)

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

2

NOVAVAX, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	For the Six Months Ended June 30,
	2015			2014
Operating Activities:
Net loss	$	(45,011	)	$	(31,674	)
Reconciliation of net loss to net cash used in operating activities:
Depreciation and amortization		2,795			1,956
Amortization of net premiums on marketable securities		593			(80	)
Deferred rent		(365	)		(45	)
Non-cash stock-based compensation		4,514			2,892
Realized gains on marketable securities		―			(615	)
Other		78			4
Changes in operating assets and liabilities:
Restricted cash		297			1,214
Accounts receivable – billed		5,364			(1,828	)
Accounts receivable – unbilled		602			149
Prepaid expenses and other assets		(3,449	)		(1,823	)
Accounts payable and accrued expenses		(8,339	)		(1,279	)
Deferred revenue		109			(243	)
Net cash used in operating activities		(42,812	)		(31,372	)
Investing Activities:
Capital expenditures		(9,240	)		(1,846	)
Proceeds from disposal of property and equipment		―			12
Proceeds from maturities of marketable securities		63,350			13,440
Purchases of marketable securities		(75,729	)		(104,686	)
Net cash used in investing activities		(21,619	)		(93,080	)
Financing Activities:
Principal payments on capital leases		(33	)		(32	)
Principal payments on notes payable		(315	)		(338	)
Changes in restricted cash		―			(1	)
Cash paid with the Novavax AB acquisition		―			(171	)
Net proceeds from sales of common stock		197,093			107,900
Proceeds from the exercise of stock options and employee stock purchases		2,815			1,510
Net cash provided by financing activities		199,560			108,868
Effect of exchange rate on cash and cash equivalents		(80	)		(30	)
Net increase (decrease) in cash and cash equivalents		135,049			(15,614	)
Cash and cash equivalents at beginning of period		32,335			119,471
Cash and cash equivalents at end of period	$	167,384		$	103,857
Supplemental disclosure of non-cash activities:
Property and equipment purchases included in accounts payable and accrued expenses	$	2,165		$	840
Sale of common stock under the Sales Agreement not settled at quarter-end	$	679		$	―
Supplemental disclosure of cash flow information:
Cash payments of interest	$	57		$	100

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

3

NOVAVAX, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
June 30, 2015

(unaudited)

Note 1 – Organization

Novavax, Inc. (“Novavax,” and together with its wholly owned subsidiary “Novavax AB,” the “Company”) is a clinical-stage vaccine company focused on the discovery, development and commercialization of recombinant nanoparticle vaccines and adjuvants. The Company’s product pipeline targets a variety of infectious diseases with vaccine candidates currently in clinical development for respiratory syncytial virus (“RSV”), seasonal influenza, pandemic influenza and Ebola virus (“EBOV”). The Company has additional preclinical stage programs in a variety of infectious diseases, including Middle East Respiratory Syndrome (“MERS”).

Note 2 – Operations

The Company’s vaccine candidates currently under development, some of which include adjuvants, will require significant additional research and development efforts that include extensive preclinical studies and clinical testing, and regulatory approval prior to commercial use.

As a clinical-stage vaccine company, the Company has primarily funded its operations from proceeds through the sale of its common stock in equity offerings and revenue under its contract with the Department of Health and Human Services, Biomedical Advanced Research and Development Authority (“HHS BARDA”) and, to a lesser degree, revenue under its prior contract with PATH Vaccine Solutions (“PATH”). Management regularly reviews the Company’s cash and cash equivalents and marketable securities relative to its operating budget and forecast to monitor the sufficiency of the Company’s working capital, and anticipates continuing to draw upon available sources of capital to support its product development activities.

Note 3 – Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. The consolidated balance sheet as of June 30, 2015, the consolidated statements of operations and the consolidated statements of comprehensive loss for the three and six months ended June 30, 2015 and 2014 and the consolidated statements of cash flows for the six months ended June 30, 2015 and 2014 are unaudited, but include all adjustments (consisting of normal recurring adjustments) that the Company considers necessary for a fair presentation of the financial position, operating results, comprehensive loss and cash flows, respectively, for the periods presented. Although the Company believes that the disclosures in these consolidated financial statements are adequate to make the information presented not misleading, certain information and footnote information normally included in consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted as permitted under the rules and regulations of the United States Securities and Exchange Commission (“SEC”).

The unaudited consolidated financial statements include the accounts of Novavax, Inc. and its wholly owned subsidiary, Novavax AB. All intercompany accounts and transactions have been eliminated in consolidation.

4

The accompanying consolidated financial statements are presented in U.S. dollars. The functional currency of Novavax AB, which is located in Sweden, is the local currency (Swedish Krona). The translation of assets and liabilities of Novavax AB to U.S. dollars is made at the exchange rate in effect at the consolidated balance sheet date, while equity accounts are translated at historical rates. The translation of the statement of operations data is made at the average exchange rate in effect for the period. The translation of operating cash flow data is made at the average exchange rate in effect for the period, and investing and financing cash flow data is translated at the exchange rate in effect at the date of the underlying transaction. Translation gains and losses are recognized as a component of accumulated other comprehensive loss in the accompanying consolidated balance sheets. The foreign currency translation adjustment balance included in accumulated other comprehensive loss was $8.7 million and $6.5 million at June 30, 2015 and December 31, 2014, respectively.

The accompanying unaudited consolidated financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. Results for this or any interim period are not necessarily indicative of results for any future interim period or for the entire year. The Company operates in one business segment.

Use of Estimates

The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates.

Cash and Cash Equivalents

Cash and cash equivalents consist of highly liquid investments with maturities of three months or less from the date of purchase. Cash and cash equivalents consist of the following at (in thousands):

	June 30, 2015		December 31, 2014
Cash	$	13,203	$	4,481
Money market funds		125,090		20,354
Government-backed security		28,000		7,500
Asset-backed securities		1,091		―
Cash and cash equivalents	$	167,384	$	32,335

Cash equivalents are recorded at cost plus accrued interest, which approximate fair value due to their short-term nature.

Fair Value Measurements

The Company applies Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements and Disclosures, for financial and non-financial assets and liabilities.

ASC 820 discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost). The statement utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels:

· Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities.

· Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.

· Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions.

5

Marketable Securities

Marketable securities consist of commercial paper, asset-backed securities and corporate notes. Classification of marketable securities between current and non-current is dependent upon the maturity date at the balance sheet date taking into consideration the Company’s ability and intent to hold the investment to maturity.

Interest and dividend income is recorded when earned and included in investment income in the consolidated statements of operations. Premiums and discounts, if any, on marketable securities are amortized or accreted to maturity and included in investment income in the consolidated statements of operations. The specific identification method is used in computing realized gains and losses on the sale of the Company’s securities.

The Company classifies its marketable securities with readily determinable fair values as “available-for-sale.” Investments in securities that are classified as available-for-sale are measured at fair market value in the consolidated balance sheets, and unrealized holding gains and losses on marketable securities are reported as a separate component of stockholders’ equity until realized. Marketable securities are evaluated periodically to determine whether a decline in value is “other-than-temporary.” The term “other-than-temporary” is not intended to indicate a permanent decline in value. Rather, it means that the prospects for a near term recovery of value are not necessarily favorable, or that there is a lack of evidence to support fair values equal to, or greater than, the carrying value of the security. Management reviews criteria, such as the magnitude and duration of the decline, as well as the Company’s ability to hold the securities until market recovery, to predict whether the loss in value is other-than-temporary. If a decline in value is determined to be other-than-temporary, the value of the security is reduced and the impairment is recorded as other income, net in the consolidated statements of operations.

Restricted Cash

The Company’s current restricted cash at December 31, 2014 includes payments received under the prior PATH agreement (See Note 9) until such time as the Company has paid for the outside services performed under the agreement. In addition, the Company’s non-current restricted cash with respect to its manufacturing, laboratory and office space in Gaithersburg, Maryland functions as collateral for letters of credit, which serve as security deposits for the duration of the leases. At June 30, 2015 and December 31, 2014, non-current restricted cash is $0.8 million and is recorded as other non-current assets on the consolidated balance sheets.

Revenue Recognition

The Company performs research and development for U.S. Government agencies and other collaborators under cost reimbursable and fixed price contracts, including license and clinical development agreements. The Company recognizes revenue under research contracts when a contract has been executed, the contract price is fixed or determinable, delivery of services or products has occurred and collection of the contract price is reasonably assured. Payments received in advance of work performed are recorded as deferred revenue and losses on contracts, if any, are recognized in the period in which they become known.

Under cost reimbursable contracts, the Company is reimbursed and recognizes revenue as allowable costs are incurred plus a portion of the fixed-fee earned. The Company considers fixed-fees under cost reimbursable contracts to be earned in proportion to the allowable costs incurred in performance of the work as compared to total estimated contract costs, with such costs incurred representing a reasonable measurement of the proportional performance of the work completed. Under its HHS BARDA contract, certain activities must be pre-approved by HHS BARDA in order for their costs to be deemed allowable direct costs. Direct costs incurred under cost reimbursable contracts are recorded as cost of government contracts revenue. The Company’s HHS BARDA contract provides the U.S. government the ability to terminate the contract for convenience or to terminate for default if the Company fails to meet its obligations as set forth in the statement of work. The Company believes that if the government were to terminate the HHS BARDA contract for convenience, the costs incurred through the effective date of such termination and any settlement costs resulting from such termination would be allowable costs. Payments to the Company under cost reimbursable contracts with agencies of the U.S. Government, such as the HHS BARDA contract, are provisional payments subject to adjustment upon annual audit by the government. An audit of fiscal year 2013 has been initiated, but has not been completed as of the date of this filing. Management believes that revenue for periods not yet audited has been recorded in amounts that are expected to be realized upon final audit and settlement. When the final determination of the allowable costs for any year has been made, revenue and billings may be adjusted accordingly in the period that the adjustments are known and collection is probable.

6

The Company’s collaborative research and development agreements may include an upfront payment, payments for research and development services, milestone payments and royalties. Agreements with multiple deliverables are evaluated to determine if the deliverables can be divided into more than one unit of accounting. A deliverable can generally be considered a separate unit of accounting if both of the following criteria are met: (1) the delivered item(s) has value to the customer on a stand-alone basis; and (2) if the arrangement includes a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) is considered probable and substantially in control of the Company. Deliverables that cannot be divided into separate units are combined and treated as one unit of accounting. Consideration received is allocated among the separate units of accounting based on the relative selling price method. Deliverables under these arrangements typically include rights to intellectual property, research and development services and involvement by the parties in steering committees. Historically, deliverables under the Company’s collaborative research and development agreements have been deemed to have no stand-alone value and as a result have been treated as a single unit of accounting. In addition, the Company analyzes its contracts and collaborative agreements to determine whether the payments received should be recorded as revenue or as a reduction to research and development expenses. In reaching this determination, management considers a number of factors, including whether the Company is principal under the arrangement, and whether the arrangement is significant to, and part of, the Company’s core operations. Historically, payments received under its contracts and collaborative agreements have been recognized as revenue since the Company acts as a principal in the arrangement and the activities are core to its operations.

When the performance under a fixed price contract can be reasonably estimated, revenue for fixed price contracts is recognized under the proportional performance method and earned in proportion to the contract costs incurred in performance of the work as compared to total estimated contract costs. Costs incurred under fixed price contracts represent a reasonable measurement of proportional performance of the work. Direct costs incurred under collaborative research and development agreements are recorded as research and development expenses. If the performance under a fixed price contract cannot be reasonably estimated, the Company recognizes the revenue on a straight-line basis over the contract term.

Revenue associated with upfront payments under arrangements is recognized over the contract term or when all obligations associated with the upfront payment have been satisfied.

Revenue from the achievement of research and development milestones, if deemed substantive, is recognized as revenue when the milestones are achieved and the milestone payments are due and collectible. If not deemed substantive, the Company would recognize such milestone as revenue upon its achievement on a straight-line basis over the remaining expected term of the research and development period. Milestones are considered substantive if all of the following conditions are met: (1) the milestone is non-refundable; (2) there is substantive uncertainty of achievement of the milestone at the inception of the arrangement; (3) substantive effort is involved to achieve the milestone and such achievement relates to past performance; and (4) the amount of the milestone appears reasonable in relation to the effort expended and all of the deliverables and payment terms in the arrangement.

Net Loss per Share

Net loss per share is computed using the weighted average number of shares of common stock outstanding. All outstanding stock options and unvested restricted stock awards totaling 23,248,254 and 16,514,230 at June 30, 2015 and 2014, respectively, are excluded from the computation, as their effect is antidilutive.

7

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance under Topic 605, Revenue Recognition. The new standard requires a company to recognize revenue when it transfers goods and services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. ASU 2014-09 defines a five-step process that includes identifying the contract with the customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations in the contract and recognizing revenue when (or as) the entity satisfies the performance obligations. In July 2015, the FASB approved a one-year deferral of the effective date of the new standard to 2018 for public companies, with an option that would permit companies to adopt the new standard as early as the original effective date of 2017. Early adoption prior to the original effective date is not permitted. The Company is evaluating the potential impact that ASU 2014-09 will have on its consolidated financial position and results of operations.

Note 4 – Fair Value Measurements

The following table represents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis (in thousands):

	Fair Value at June 30, 2015						Fair Value at December 31, 2014
Assets	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Money market funds	$	125,090	$	―	$	—	$	20,354	$	―	$	—
Government-backed  security		—		28,000		—		―		7,500		—
Asset-backed securities		—		49,466		—		—		46,624		—
Corporate debt securities		—		99,179		—		—		89,097		—
Total cash equivalents and marketable securities	$	125,090	$	176,645	$	—	$	20,354	$	143,221	$	—

During the six months ended June 30, 2015, the Company did not have any transfers between levels.

The amounts in the Company’s consolidated balance sheet for accounts receivable – billed, accounts receivable – unbilled and accounts payable approximate fair value due to their short-term nature. Based on borrowing rates available to the Company, the fair value of capital lease and notes payable approximates their carrying value.

8

Note 5 – Marketable Securities

Marketable securities classified as available-for-sale as of June 30, 2015 and December 31, 2014 were comprised of (in thousands):

	June 30, 2015									December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Asset-backed securities	$	48,381	$	1	$	(7	)	$	48,375	$	46,660	$	—	$	(36	)	$	46,624
Corporate debt securities		99,189		17		(27	)		99,179		89,126		8		(37	)		89,097
Total	$	147,570	$	18	$	(34	)	$	147,554	$	135,786	$	8	$	(73	)	$	135,721

Marketable Securities – Unrealized Losses

The Company owned 47 available-for-sale securities as of June 30, 2015. Of these 47 securities, 33 had combined unrealized losses of less than $0.1 million as of June 30, 2015. The Company did not have any investments in a loss position for greater than 12 months as of June 30, 2015. The Company has evaluated its marketable securities and has determined that none of these investments has an other-than-temporary impairment, as it has no intent to sell securities with unrealized losses and it is not more likely than not that the Company will be required to sell any securities with unrealized losses, given the Company’s current and anticipated financial position.

Note 6 – Goodwill and Other Intangible Assets

Goodwill

The change in the carrying amounts of goodwill for the six months ended June 30, 2015 was as follows (in thousands):

	Amount
Balance at December 31, 2014	$	54,612
Currency translation adjustments		(1,305	)
Balance at June 30, 2015	$	53,307

Identifiable Intangible Assets

Purchased intangible assets consisted of the following as of June 30, 2015 and December 31, 2014 (in thousands):

	June 30, 2015							December 31, 2014
	Gross Carrying Amount		Accumulated Amortization			Intangible Assets, Net		Gross Carrying Amount		Accumulated Amortization			Intangible Assets, Net
Finite-lived intangible assets:
Proprietary adjuvant technology	$	8,969	$	(860	)	$	8,109	$	9,565	$	(678	)	$	8,887
Collaboration agreements		4,049		(798	)		3,251		4,319		(629	)		3,690
Total identifiable intangible assets	$	13,018	$	(1,658	)	$	11,360	$	13,884	$	(1,307	)	$	12,577

9

Amortization expense for the six months ended June 30, 2015 and 2014 was $0.4 million and $0.6 million, respectively.

Estimated amortization expense for existing intangible assets for the remainder of 2015 and for each of the five succeeding years ending December 31 will be as follows (in thousands):

Year	Amount
2015 (remainder)	$	433
2016		865
2017		865
2018		865
2019		865
2020		865

Note 7 – Stockholders’ Equity

On June 18, 2015, the Company’s stockholders of record as of April 20, 2015 approved the amendment to the Company’s Amended and Restated Certificate of Incorporation (the “Charter Amendment”) to increase the total number of shares of common stock that the Company is authorized to issue from 300,000,000 shares to 600,000,000 shares.

In March 2015, the Company completed a public offering of 27,758,620 shares of its common stock, including 3,620,689 shares of common stock that were issued upon the exercise in full of the option to purchase additional shares granted to the underwriters, at a price of $7.25 per share resulting in proceeds, net of offering costs of $11.6 million, of approximately $190 million.

In 2012, the Company entered into an At Market Issuance Sales Agreement (“Sales Agreement”), under which the Board of Directors of the Company (the “Board”) approved the Company’s sale of up to an aggregate of $50 million in gross proceeds of its common stock. These shares of common stock were offered pursuant to a shelf registration statement filed with the SEC in March 2013, which replaced the previous shelf registration statement filed in 2010. The Board’s standing Finance Committee (the “Committee”) assisted with its responsibilities to monitor, provide advice to the Company’s senior management and approve all capital raising activities. In doing so, the Committee set the amount of shares to be sold, the period of time during which such sales may occur and the minimum sales price per share. During the six months ended June 30, 2015, the Company sold 0.8 million shares at an average sales price of $10.01 per share, resulting in approximately $8 million in net proceeds, of which $0.7 million was received in July 2015 upon settlement. In July 2015, the Company sold the remaining $6.6 million of common stock (0.6 million shares at an average sales price of $11.53 per share) under the Sales Agreement. The Sales Agreement has thus been fully utilized.

Note 8 – Stock-Based Compensation

Stock Options

The Amended and Restated 2005 Stock Incentive Plan (“2005 Plan”) expired in February 2015 and no new awards may be made under such plan, although outstanding awards will continue in accordance with their terms. The Board adopted the 2015 Stock Incentive Plan (“2015 Plan”) in March 2015 and, consistent with historical practice, granted annual and new equity awards prior to the Company’s annual meeting of stockholders in June 2015 under the 2015 Plan; however, these awards were contingent upon stockholder approval of both the 2015 Plan and the Company’s Charter Amendment (See Note 7), both of which were approved at the Company’s annual meeting of stockholders in June 2015. Under the 2015 Plan, equity awards may be granted to officers, directors, employees and consultants of and advisors to the Company and any present or future subsidiary. The 2015 Plan authorizes the issuance of up to 25,000,000 shares of common stock under equity awards granted under the plan. All such shares authorized for issuance under the 2015 Plan have been reserved. The 2015 Plan will expire on March 4, 2025.

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The 2015 Plan permits and the 2005 Plan permitted the grant of stock options (including incentive stock options), restricted stock, stock appreciation rights, and restricted stock units. In addition, under the 2015 Plan, unrestricted stock, stock units and performance awards may be granted. Stock options and stock appreciation rights generally have a maximum term of 10 years and may be or were granted with an exercise price that is no less than 100% of the fair market value of the Company’s common stock at the time of grant. Grants of stock options are generally subject to vesting over periods ranging from six months to four years.

Stock Options Awards

The following is a summary of option activity under the 2015 Plan, 2005 Plan and the 1995 Stock Option Plan (“1995 Plan”) for the six months ended June 30, 2015:

	2015 Plan					2005 Plan					1995 Plan
	Stock Options			Weighted- Average Exercise Price		Stock Options			Weighted- Average Exercise Price		Stock Options			Weighted- Average Exercise Price
Outstanding at January 1, 2015		—		$	—		16,928,098		$	3.24		35,000		$	2.21
Granted		7,369,441		$	8.97		22,500		$	6.70		—		$	—
Exercised		—		$	—		(877,910	)	$	2.24		(35,000	)	$	2.21
Canceled		(55,500	)	$	8.94		(153,375	)	$	3.92		—		$	—
Outstanding at June 30, 2015		7,313,941		$	8.97		15,919,313		$	3.29		—		$	—
Shares exercisable at June 30, 2015		—		$	—		8,320,563		$	2.51		—		$	—
Shares available for grant at June 30, 2015		17,686,059

As discussed in the “Stock Options” section above, prior to the Company’s annual meeting of stockholders in June 2015, the Company granted 7,014,441 stock options with a weighted-average exercise price of $8.94 under the 2015 Plan. Since the 2015 Plan and the Charter Amendment were approved at the Company’s annual meeting of stockholders in June 2015, the Company began to record stock-based compensation expense for these awards at that time.

The fair value of stock options granted under the 2015 Plan and 2005 Plan was estimated at the date of grant or the date upon which the 2015 Plan was approved by the Company’s stockholders for stock options granted prior to that time using the Black-Scholes option-pricing model with the following assumptions:

	Three Months Ended June 30,		Six Months Ended June 30,
	2015	2014	2015	2014
Weighted-average Black- Scholes fair value of stock options granted	$4.42	$1.92	$4.42	$2.48
Risk-free interest rate	1.37%-2.13%	1.33%-1.39%	1.19%-2.13%	1.24%-2.22%
Dividend yield	0%	0%	0%	0%
Volatility	54.18%-68.39%	52.87%-53.81%	53.58%-68.39%	52.47%-67.93%
Expected term (in years)	3.98-7.34	4.10-4.26	3.98-7.34	4.04-6.96
Expected forfeiture rate	0%-16.33%	0%-23.15%	0%-16.33%	0%-23.15%

The total aggregate intrinsic value and weighted-average remaining contractual term of stock options outstanding under the 2015 Plan and 2005 Plan as of June 30, 2015 was approximately $140.8 million and 8.1 years, respectively. The total aggregate intrinsic value and weighted-average remaining contractual term of stock options exercisable under the 2015 Plan and 2005 Plan as of June 30, 2015 was approximately $71.8 million and 6.6 years, respectively. The aggregate intrinsic value represents the total intrinsic value (the difference between the Company’s closing stock price on the last trading day of the period and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on June 30, 2015. This amount is subject to change based on changes to the closing price of the Company’s common stock. The aggregate intrinsic value of options exercised for the six months ended June 30, 2015 and 2014 was $6.0 million and $1.7 million, respectively.

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Employee Stock Purchase Plan

In April 2013, the Company adopted an Employee Stock Purchase Plan (the “ESPP”), which authorized an aggregate of 2,000,000 shares of common stock to be purchased, which will increase 5% on each anniversary of its adoption up to a maximum of 3,000,000 shares. The ESPP allows employees to purchase shares of common stock of the Company at each purchase date through payroll deductions of up to a maximum of 15% of their compensation, at 85% of the lesser of the market price of the shares at the time of purchase or the market price on the beginning date of an option period (or, if later, the date during the option period when the employee was first eligible to participate). At June 30, 2015, there were 1,413,388 shares available for issuance under the ESPP.

The ESPP is considered compensatory for financial reporting purposes. As such, the fair value of ESPP shares was estimated at the date of grant using the Black-Scholes option-pricing model with the following assumptions:

	Three Months Ended June 30,		Six Months Ended June 30,
	2015	2014	2015	2014
Range of Black-Scholes fair value of ESPP shares granted	$1.20-$2.24	$0.97-$1.79	$1.06-$2.24	$0.97-$1.79
Risk-free interest rate	0.07%-0.35%	0.11%-0.14%	0.05%-0.35%	0.11%-0.14%
Dividend yield	0%	0%	0%	0%
Volatility	40.79%-64.24%	53.80%-67.57%	40.79%-64.24%	53.80%-67.57%
Expected term (in years)	0.5-2.0	0.5-1.0	0.5-2.0	0.5-1.0
Expected forfeiture rate	5%	5%	5%	5%

Restricted Stock Awards

The following is a summary of restricted stock awards activity for the six months ended June 30, 2015:

	Number of Shares		Per Share Weighted- Average Grant-Date Fair Value
Outstanding and Unvested at January 1, 2015		15,000	$	4.48
Restricted stock granted		—	$	—
Restricted stock vested		—	$	—
Restricted stock forfeited		—	$	—
Outstanding and Unvested at June 30, 2015		15,000	$	4.48

The Company recorded all stock-based compensation expense in the consolidated statements of operations as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Research and development	$	1,090	$	651	$	2,122	$	1,175
General and administrative		1,490		1,201		2,392		1,717
Total stock-based compensation expense	$	2,580	$	1,852	$	4,514	$	2,892

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As of June 30, 2015, there was approximately $35.2 million of total unrecognized compensation expense (net of estimated forfeitures) related to unvested stock options, ESPP and restricted stock awards. This unrecognized non-cash compensation expense is expected to be recognized over a weighted-average period of 1.6 years, and will be allocated between research and development and general and administrative expenses accordingly. This estimate does not include the impact of other possible stock-based awards that may be made during future periods.

Note 9 – U.S. Government Agreement, Joint Venture and Collaborations

HHS BARDA Contract for Recombinant Influenza Vaccines

HHS BARDA initially awarded the Company a contract in 2011, which funds the development of both the Company’s seasonal and pandemic influenza VLP vaccine candidates. The contract with HHS BARDA is a cost-plus-fixed-fee contract, which reimburses the Company for allowable direct contract costs incurred plus allowable indirect costs and a fixed-fee earned in the ongoing clinical development and product scale-up of its multivalent seasonal and monovalent pandemic H7N9 influenza VLP vaccine candidates. In September 2014, HHS BARDA exercised and initiated a two-year option to the contract, which included scope to support development activities leading up to planned Phase 3 clinical studies, added $70 million of funding on top of the remainder of the $97 million base period funding, and extended the contract until September 2016. In June 2015, the contract was amended to increase the funding by $7.7 million to allow for the recovery of additional costs under the contract relating to the settlement of indirect rates for fiscal years 2011 and 2012. This additional amount was received and recorded as revenue in the three months ended June 30, 2015. During the three and six months ended June 30, 2015, the Company recognized revenue of $13.7 million and $23.0 million, respectively, and has recognized approximately $101 million in revenue since the inception of the contract. Billings under the contract are based on approved provisional indirect billing rates, which permit recovery of fringe benefits, overhead and general and administrative expenses. These indirect rates are subject to audit by HHS BARDA on an annual basis. An audit of fiscal year 2013 has been initiated, but has not been completed as of the date of this filing. Management believes that revenue for periods not yet audited has been recorded in amounts that are expected to be realized upon final audit and settlement. When the final determination of the allowable costs for any year has been made, revenue and billings may be adjusted accordingly in the period that the adjustments are known and collection is probable.

In 2012, HHS BARDA withheld payment on the outside costs of the Company’s Phase 2 clinical trial of its seasonal quadrivalent influenza VLP vaccine candidate in Australia (“205 Trial”). Such outside costs were recorded as expenses in the period incurred as a cost of government contracts revenue and the Company did not record revenue relating to such outside costs prior to the first quarter of 2015 because collection of the amount was not reasonably assured. In late 2014, the U.S. Food and Drug Administration, Center for Biologics Evaluation and Research (“FDA”) accepted the data from the 205 Trial as part of the Company’s investigational new drug (“IND”) application for its seasonal quadrivalent influenza VLP vaccine candidate. In the first quarter of 2015, HHS BARDA approved the reimbursement of the 205 Trial costs, and the Company recorded revenue of $3.1 million as collection of the amount became reasonably assured during the period. The Company also collected this amount in 2015.

CPLB Joint Venture

In 2009, the Company formed a joint venture with Cadila Pharmaceuticals Limited (“Cadila”) named CPL Biologicals Private Limited (“CPLB”) to develop and manufacture vaccines, biological therapeutics and diagnostics in India. CPLB is owned 20% by the Company and 80% by Cadila. The Company accounts for its investment in CPLB using the equity method. Because CPLB’s activities and operations are controlled and funded by Cadila, the Company accounts for its investment using the equity method. Since the carrying value of the Company’s initial investment was nominal and there is no guarantee or commitment to provide future funding, the Company has not recorded nor expects to record losses related to this investment in the foreseeable future.

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LG Life Sciences, Ltd. (“LGLS”) License Agreement

In 2011, the Company entered into a license agreement with LGLS that allows LGLS to use the Company’s technology to develop and commercially sell influenza vaccines exclusively in South Korea and non-exclusively in certain other specified countries. At its own cost, LGLS is responsible for funding both its clinical development of the influenza VLP vaccines and a manufacturing facility to produce such vaccines in South Korea. Under the license agreement, the Company is obligated to provide LGLS with information and materials related to the manufacture of the licensed products, provide on-going project management and regulatory support and conduct clinical trials of its influenza vaccines in order to obtain FDA approval in the U.S. The term of the license agreement is expected to terminate in 2027. Payments to the Company under the license agreement include an upfront payment of $2.5 million, reimbursements of certain development and product costs, payments related to the achievement of certain milestones and royalty payments in the high single digits from LGLS’s future commercial sales of influenza VLP vaccines. The upfront payment has been deferred and recorded in deferred revenue in the consolidated balance sheets and will be recognized when the previously mentioned obligations in the agreement are satisfied, which may not occur until the end of the term of the agreement. Payments for milestones under the agreement will be recognized on a straight-line basis over the remaining term of the research and development period upon achievement of such milestone. Any royalties under the agreement will be recognized as earned.

PATH Vaccine Solutions (“PATH”) Clinical Development Agreement

In 2012, the Company entered into a clinical development agreement with PATH to develop its RSV F vaccine candidate (“RSV F Vaccine”) for maternal immunization in certain low-resource countries. The Company was awarded approximately $2.0 million by PATH for initial funding under the agreement to partially support its Phase 2 dose-ranging clinical trial in women of childbearing age. In October 2013, the funding under this agreement was increased by $0.4 million to support reproductive toxicology studies, which was necessary before the Company began conducting clinical trials in pregnant women. In December 2013, the Company entered into an amendment with PATH providing an additional $3.5 million in funding to support the Phase 2 dose-confirmation clinical trial in women of childbearing age. In October 2014, the Company entered into an amendment with PATH providing an additional $1.0 million towards the development of a strategy for conducting the planned Phase 3 clinical trials of the Company’s RSV maternal immunization program. The term of the PATH agreement expired in April 2015 and the Company retains global rights to commercialize the RSV product. The Company has submitted a funding proposal to the Bill & Melinda Gates Foundation (“BMGF”) for support of the Company’s continuing development of an affordable and accessible RSV vaccine for maternal immunization programs in low resource countries. The Company and BMGF are currently in ongoing discussions about such an arrangement, but there can be no assurances that it will be completed. The Company recognized revenue of $0.1 million and $0.5 million in the three and six ended June 30, 2015, and has recognized $6.8 million in revenue since the inception of the agreement. Revenue under this arrangement is being recognized under the proportional performance method and earned in proportion to the contract costs incurred in performance of the work as compared to total estimated contract costs. Costs incurred under this agreement represent a reasonable measurement of proportional performance of the services being performed.

Note 10 – Master Services Agreement with Cadila

The Company and Cadila entered into a master services agreement pursuant to which the Company may request services from Cadila in the areas of biologics research, preclinical development, clinical development, process development, manufacturing scale-up and general manufacturing related services in India. In July 2011, and subsequently in March 2013, March 2014 and February 2015, the master services agreement was amended to extend the term by one year for which services can be provided by Cadila under this agreement. Under the revised terms, if, by March 31, 2016, the amount of services provided by Cadila is less than $7.5 million, the Company will pay Cadila the portion of the shortfall amount that is less than or equal to $2.0 million. Through June 30, 2015, the Company has purchased $6.7 million in services from Cadila pursuant to this agreement, which includes services provided, since the beginning of 2013, by CPLB to the Company on behalf of Cadila pursuant to an October 2013 amendment authorizing such CPLB services. During the six months ended June 30, 2015, the Company purchased $1.0 million in services from Cadila pursuant to this agreement, all of which were provided by CPLB on behalf of Cadila. As of June 30, 2015, the Company’s remaining obligation to Cadila under the master services agreement is $0.8 million. The Company has recognized as expense the entire amount of purchases to date related to CPLB as the Company has not recorded any equity income (loss) of CPLB (see Note 9).

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Note 11 – License agreement with Wyeth Holding Corporation

In 2007, the Company entered into an agreement to license certain rights from Wyeth Holding Corporation, a subsidiary of Pfizer Inc. (“Wyeth”). The Wyeth license is a non-exclusive, worldwide license to a family of patents and patent applications covering VLP technology for use in human vaccines in certain fields, with expected patent expiration in early 2022. The Wyeth license provides for the Company to make an upfront payment (previously made), ongoing annual license fees, sublicense payments, milestone payments on certain development activities and royalties on any product sales. The milestone payments are one-time only payments applicable to each related vaccine program. At present, the Company’s seasonal influenza VLP vaccine program (including CPLB’s seasonal influenza program) and its pandemic influenza VLP vaccine program are the only two programs to which the Wyeth license applies. The license may be terminated by Wyeth only for cause and may be terminated by the Company only after it has provided ninety (90) days’ notice that the Company has absolutely and finally ceased activity, including through any affiliate or sublicense, related to the manufacturing, development, marketing or sale of products covered by the license. Payments under the agreement to Wyeth as of June 30, 2015 aggregated $6.4 million. The Company is currently in discussions with Wyeth to potentially amend the agreement and restructure the milestone payment owed as a result of CPLB’s initiation of a Phase 3 clinical trial for its seasonal influenza VLP vaccine candidate in the third quarter of 2014. Such milestone payment is only owed once for the Company’s seasonal influenza VLP vaccine program and it would not be required to make another payment if it or any of its affiliates initiate an additional Phase 3 clinical trial in a seasonal influenza VLP vaccine candidate. The $3.0 million milestone continues to be accrued for on the consolidated balance sheet at June 30, 2015 and was recorded as a research and development expense in the third quarter of 2014.

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Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

Any statements in the discussion below and elsewhere in this Quarterly Report, about expectations, beliefs, plans, objectives, assumptions or future events or performance of Novavax, Inc. (Novavax, and together with its wholly owned subsidiary Novavax AB, the “Company,” “we” or “us”) are not historical facts and are forward-looking statements. Such forward-looking statements include, without limitation, statements with respect to our capabilities, goals, expectations regarding future revenue and expense levels; potential market sizes and demand for our product candidates; the efficacy, safety and intended utilization of our product candidates; the development of our clinical-stage product candidates and our recombinant vaccine and adjuvant technologies; the development of our preclinical product candidates; the conduct, timing and potential results from clinical trials and other preclinical studies; plans for and potential timing of regulatory filings; the expected timing and content of regulatory actions; reimbursement by Department of Health and Human Services, Biomedical Advanced Research and Development Authority (HHS BARDA); the potential modification to our license agreement with Wyeth; our available cash resources and the availability of financing generally, plans regarding partnering activities, business development initiatives and the adoption of stock incentive plans, and other factors referenced herein. You generally can identify these forward-looking statements by the use of words or phrases such as “believe,” “may,” “could,” “will,” “would,” “possible,” “can,” “estimate,” “continue,” “ongoing,” “consider,” “anticipate,” “intend,” “seek,” “plan,” “project,” “expect,” “should,” “would,” or “assume” or the negative of these terms, or other comparable terminology, although not all forward-looking statements contain these words.

Accordingly, these statements involve estimates, assumptions and uncertainties that could cause actual results to differ materially from those expressed or implied in them. Any or all of our forward-looking statements in this Quarterly Report may turn out to be inaccurate or materially different than actual results.

Because the risk factors discussed in this Quarterly Report and identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2014, and other risk factors of which we are not aware, could cause actual results or outcomes to differ materially from those expressed in any forward-looking statements made by or on behalf of us, you should not place undue reliance on any such forward-looking statements. These statements are subject to risks and uncertainties, known and unknown, which could cause actual results and developments to differ materially from those expressed or implied in such statements. We have included important factors in the cautionary statements included in this Quarterly Report, particularly those identified in Part II, Item 1A “Risk Factors,” and in Part I, Item 1A “Risk Factors” of our Annual Report on Form 10-K, that we believe could cause actual results or events to differ materially from the forward-looking statements that we make. These and other risks may also be detailed and modified or updated in our reports and other documents filed with the Securities and Exchange Commission (“SEC”) from time to time. You are encouraged to read these filings as they are made.

Although we believe that the expectations reflected in our forward-looking statements are reasonable, we cannot guarantee future results, events, levels of activity, performance or achievement. Further, any forward-looking statements speak only as of the date on which it is made, and we undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, unless required by law. New factors emerge from time to time, and it is not possible for us to predict which factors will arise. In addition, we cannot assess the impact of each factor on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements.

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Overview

We are a clinical-stage vaccine company focused on the discovery, development and commercialization of recombinant nanoparticle vaccines and adjuvants. Using innovative proprietary recombinant nanoparticle vaccine technology, we produce vaccine candidates to efficiently and effectively respond to both known and newly emerging diseases. Our vaccine candidates are genetically engineered three-dimensional nanostructures that incorporate immunologically important proteins. Our product pipeline targets a variety of infectious diseases with vaccine candidates currently in clinical development for respiratory syncytial virus (“RSV”), seasonal influenza, pandemic influenza and Ebola virus (“EBOV”). We have additional preclinical stage programs in a variety of infectious diseases, including Middle East Respiratory Syndrome (“MERS”). Further, CPL Biologics Private Limited (“CPLB”), our joint venture company with Cadila Pharmaceuticals Limited (“Cadila”) in India, is actively developing a number of vaccine candidates that were genetically engineered by us, including its seasonal VLP influenza vaccine candidate that completed its Phase 3 clinical trial in India in 2014, and its rabies vaccine that completed its Phase 1/2 clinical trial in India in 2014. CPLB is owned 20% by us and 80% by Cadila. CPLB operates a manufacturing facility in India for the production of vaccines.

We are also developing proprietary technology for the production of immune stimulating saponin-based adjuvants, through our Swedish wholly owned subsidiary, Novavax AB. Our Matrix™ adjuvant technology utilizes selected quillaja fractions, which form separate matrix structures, to develop multi-purpose immune-modulating adjuvant products for a broad range of potential vaccine applications. Our lead adjuvant for human applications, Matrix-M™, has been successfully tested in a Phase 1/2 clinical trial for our pandemic H7N9 influenza VLP vaccine candidate, conducted under our contract with HHS BARDA, and we are currently testing Matrix-M in conjunction with our EBOV vaccine candidate in a Phase 1 clinical trial. Genocea Biosciences, Inc. (“Genocea”) has licensed rights to our Matrix technology and is developing its herpes simplex 2 vaccine candidate using Matrix-M.

Clinical Product Pipeline

A current summary of our significant research and development programs, along with the programs of our joint venture, CPLB, and status of the related products in development follows:

Program	Development Stage	Funding Collaborator
Respiratory Syncytial Virus (RSV)
·Elderly	Phase 2
·Maternal Immunization	Phase 2	PATH*
·Pediatric	Phase 1
Influenza
·Seasonal Quadrivalent	Phase 2	HHS BARDA
·Pandemic H7N9	Phase 2	HHS BARDA
Other
·Ebola Virus (EBOV)	Phase 1
·Combination (Influenza/RSV)	Preclinical
CPLB Programs (India)
·Seasonal Influenza	Phase 3
·Rabies	Phase 1/2

*As detailed below, our funding and development arrangement with PATH expired in April 2015.

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Respiratory Syncytial Virus (RSV)

RSV is a major respiratory pathogen with a significant burden of disease in the very young and in the elderly. In healthy adults, RSV infections are generally mild to moderate in severity, but are typically more severe in infants and young children, as well as adults over the age of 60.¹ Globally, RSV is a common cause of childhood respiratory infection, with a disease burden of 64 million cases and approximately 160,000 deaths annually.² Severe RSV disease results in 3.4 million hospital admissions per year globally³ and disproportionately affects infants below six months of age. In infants, toddlers and young pre-school and school-age children, RSV infections result in the need for frequent medical care, including emergency room and office visits and are associated with increased recurrent wheezing that can persist for years. In the U.S., nearly all children become infected with RSV before they are two years of age, and it has been associated with 20% of hospitalizations and 15% of office visits for acute respiratory infection in young children.⁴ It is also estimated that between 11,000 and 17,000 elderly and high risk adults die of RSV infection or its complications annually in the U.S., and up to 180,000 are hospitalized for serious respiratory symptoms.⁵ Currently, there is no approved RSV vaccine available for any of these populations, so an RSV vaccine has the potential to protect millions of persons from this far-reaching unmet medical need.

We are developing our respiratory syncytial virus fusion (F) protein nanoparticle vaccine candidate (“RSV F Vaccine”) for the benefit of three susceptible target populations: the elderly, infants (receiving protection through antibodies transferred from their mothers who would be immunized during the last trimester of pregnancy) and pediatrics.

RSV Elderly Program

In August 2015, we announced positive top-line data from a Phase 2 clinical trial of our RSV F Vaccine in older adults (>60 years of age). The clinical trial demonstrated statistically significant vaccine efficacy in the prevention of symptomatic RSV disease in older adults, the first vaccine to demonstrate efficacy against RSV disease in any population. The clinical trial detected an attack rate of 4.9% for symptomatic RSV disease in 1,600 older adults. Similar to our findings in prior clinical trials, there were greater than four-fold increases in both anti-F IgG and palivizumab-competing antibody (PCA) concentrations with serological responses in over 95% of vaccinated subjects. We anticipate that the next steps in the development of the RSV F Vaccine for an older adult indication will include discussions with regulatory authorities and the initiation of a pivotal Phase 3 clinical trial, which could start as early as the fourth quarter of 2015.

RSV Maternal Immunization Program

In September 2014, we initiated a Phase 2 clinical trial of our RSV F Vaccine in fifty (50) healthy women in their third trimester of pregnancy. This trial is designed to evaluate the safety and immunogenicity of our RSV F Vaccine in pregnant women and assesses the impact of maternal immunization on RSV-specific antibody levels through the baby’s first six months of life and infant safety through the first year of life. The preliminary data from this trial are expected in the third quarter of 2015, and will inform the next steps in the development of our RSV maternal program. In November 2014, we announced that the U.S. Food and Drug Administration, Center for Biologics Evaluation and Research (“FDA”) had granted Fast Track Designation to our RSV F Vaccine for protection of infants via maternal immunization. The Fast Track designation, established by the FDA Modernization Act of 1997, is intended for products that treat serious or life-threatening diseases or conditions, and that demonstrate the potential to address unmet medical needs for such diseases or conditions. The program is intended to facilitate development and expedite review of drugs to treat serious and life-threatening conditions so that an approved product can reach the market expeditiously. Fast Track designation specifically facilitates meetings to discuss all aspects of development to support licensure and it provides the opportunity to submit sections of a Biologics License Application (“BLA”) on a rolling basis as data become available, which permits the FDA to review modules of the BLA as they are received instead of waiting for the entire BLA submission.

¹ Dawson-Caswell, D, et al., (2011) Am Fam Physician. 83:143 - 146

² Nair, H., et al., (2010) Lancet. 375:1545 - 1555

³ WHO, (2014) “RSV Vaccine Status;” www.who.int/immunization/research/meetings_workshops/WHO_PDVAC_RSV.pdf

⁴ Hall, CB, et al., (2009) N Engl J Med. 360(6):588-98

⁵ Falsey, A., et al., (2014) Infectious Disorders. 12(2): 98-102

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In April 2014, we announced positive top-line safety and immunogenicity data from a Phase 2 clinical trial in women of childbearing age that were similar to, or exceeded, immune responses seen in our previous clinical trials. This Phase 2 clinical trial evaluated the safety and immunogenicity of two dose levels of our RSV F Vaccine, in one or two injections, with and without an aluminum phosphate adjuvant, in 720 healthy women of childbearing age. These positive data supported Novavax’ decision to conduct the Phase 2 clinical trial in pregnant women discussed above.

PATH Vaccine Solutions (“PATH”) Clinical Development Agreement for RSV Maternal Program

In conjunction with our development of our RSV F Vaccine for maternal immunization, in 2012 we entered into a clinical development agreement with PATH to develop our RSV F Vaccine in certain low-resource countries. We were awarded approximately $2.0 million by PATH for initial funding under the agreement to partially support our Phase 2 dose-ranging clinical trial in women of childbearing age described above. In October 2013, the funding under this agreement was increased by $0.4 million to support reproductive toxicology studies, which was necessary before we began conducting clinical trials in pregnant women. In December 2013, we entered into an amendment with PATH providing an additional $3.5 million in funding to support the Phase 2 dose-confirmation clinical trial in 720 women of childbearing age. In October 2014, we entered into an amendment with PATH providing an additional $1.0 million towards the development of a strategy for conducting Phase 3 clinical trials of our RSV maternal immunization program. The term of the PATH agreement expired in April 2015 and the Company retains global rights to commercialize the RSV product. The Company has submitted a funding proposal to the Bill & Melinda Gates Foundation (“BMGF”) for support of the Company’s continuing development of an affordable and accessible RSV vaccine for maternal immunization programs in low resource countries. The Company and BMGF are currently in ongoing discussions about such an arrangement, but there can be no assurances that it will be completed.

RSV Pediatric Program

While the burden of RSV disease falls heavily on newborn infants, RSV is also a prevalent and currently unaddressed problem in pediatrics. This third market segment for our RSV F Vaccine remains an important opportunity. In November 2014, we initiated Phase 1 of our RSV pediatric program and we expect to enroll additional healthy children two to six years old into our Phase 1 program in 2016.

Influenza

Influenza is a world-wide infectious disease that causes illness in humans with symptoms ranging from mild to life-threatening; serious illness occurs not only in susceptible populations such as pediatrics and the elderly, but also in the general population because of unique strains of influenza for which most humans have not developed protective antibodies. Influenza is a major burden on public health worldwide: estimates of one million deaths each year are attributed to influenza.⁶ It is further estimated that, each year, influenza attacks between 5% and 10% of adults and 20% to 30% of children, causing significant levels of illness, hospitalization and death.⁷

Although a number of licensed seasonal influenza vaccines are currently commercially available in most geographies, and these manufacturers have capabilities to develop influenza vaccines that are responsive to unique and emerging influenza strains, we believe our influenza virus-like particle (“VLP”) vaccine candidates have immunological advantages over currently available vaccines. These immunological advantages stem from the fact that our influenza VLPs contain three of the major structural virus proteins that are important for fighting influenza: hemagglutinin (“HA”) and neuraminidase (“NA”), both of which stimulate the body to produce antibodies that neutralize the influenza virus and prevent its spread through the cells in the respiratory tract, and matrix 1 (“M1”), which stimulates cytotoxic T lymphocytes to kill cells that may already be infected. Our VLPs are not made from live viruses and have no genetic nucleic material in their inner core, which render them incapable of replicating and causing disease. We also believe there are inherent advantages to our vaccine platform technology for more rapid and efficient development of new influenza vaccine candidates.

⁶ Resolution of the World Health Assembly. Prevention and control of influenza pandemics and annual epidemics. WHA56.19. 28 May 2003

⁷ WHO. Vaccines against influenza. WHO position paper – November 2012 Weekly Epidemiol Record 2012;87(47):461–76.

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Seasonal Quadrivalent Influenza Vaccine

Developing and commercializing a seasonal influenza vaccine is an important business opportunity and strategic goal for Novavax. The Advisory Committee for Immunization Practices of the Center for Disease Control and Prevention (“CDC”) recommends that all persons aged six months and older should be vaccinated annually against seasonal influenza. In conjunction with these universal recommendations, attention from the 2009 influenza H1N1 pandemic, along with reports of other cases of avian-based influenza strains, has increased public health awareness of the importance of seasonal influenza vaccination, the market for which is expected to continue to grow worldwide in both developed and developing global markets.

In recent years, public health authorities have advocated for the development and licensure of quadrivalent (i.e., four influenza strains: two influenza A strains and two influenza B strains) influenza vaccines. It is expected that quadrivalent seasonal influenza vaccines will ultimately replace trivalent seasonal influenza vaccines in the global market. There are currently four quadrivalent influenza vaccines licensed in the U.S., although additional quadrivalent seasonal influenza vaccines are expected to be licensed over the next several years. Current estimates for seasonal influenza vaccine growth in the top seven markets (U.S., Japan, France, Germany, Italy, Spain and UK), show potential growth from approximately $3.2 billion in the 2012/13 season to $5.3 billion by the 2021/2022 season.⁸ Recombinant seasonal influenza vaccines, like the candidate we are developing, have an important advantage: once licensed for commercial sale, large quantities of vaccines can be quickly and cost-effectively manufactured without the use of either the live influenza virus or eggs.

In July 2015 we reported positive preliminary data from our Phase 2 clinical trial of our quadrivalent seasonal influenza VLP vaccine candidate in 400 healthy adults that we initiated in November 2014 under our contract with HHS BARDA. These data show that our quadrivalent seasonal influenza VLP vaccine candidate is both safe and well-tolerated, with results that met the immunogenicity targets. These results demonstrate the potential for our seasonal quadrivalent influenza VLP vaccine candidate to meet the FDA criteria for accelerated approval. We are assessing these preliminary data from this trial, and in conjunction with HHS BARDA, are evaluating the next steps in the development of our quadrivalent seasonal influenza VLP vaccine candidate.

Pandemic H7N9 Influenza Vaccine

In the aftermath of the 2009 pandemic of the A(H1N1) influenza strain, prevention of the potential devastation of a human influenza pandemic remains a key priority with both governmental health authorities and influenza vaccine manufacturers. In the U.S. alone, the 2009 H1N1 influenza pandemic led to the production of approximately 126 million doses of monovalent (single strain) vaccine. Public health awareness and government preparedness for the next potential influenza pandemic are driving development of vaccines that can be manufactured quickly against a potentially threatening influenza strain. Until the spring of 2013, industry and health experts focused attention on developing a monovalent H5N1 influenza vaccine as a potential key defense against a future pandemic threat; however, a significant number of reported cases in China of an avian-based influenza strain, known as A(H7N9), has shifted attention to the potential development of a monovalent H7N9 influenza vaccine.

⁸ Influenza Vaccines Forecasts. Datamonitor (2013)

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In collaboration with HHS BARDA, we have now developed and delivered compelling safety and immunogenicity data on two pandemic vaccine candidates, H5N1 and H7N9, which provide the U.S. government with alternatives for dealing with future potential threats. In September 2014, we announced positive results from a Phase 1/2 clinical trial of our H7N9 influenza VLP vaccine candidate adjuvanted with Matrix-M in 610 healthy adults. Under our contract with HHS BARDA, the Phase 1/2 clinical trial was designed as a dose-ranging, randomized, observer-blinded, placebo-controlled clinical trial, to determine the contribution of Matrix-M to potential antigen dose sparing regimens. Our H7N9 influenza VLP vaccine candidate, with and without Matrix-M, was well tolerated and demonstrated a safety profile similar to our prior experience with another saponin-based adjuvant. Matrix-M adjuvanted formulations demonstrated immunogenicity and dose-sparing benefits relative to unadjuvanted antigen. Hemagglutination-inhibiting antibody titers were generally comparable to those reported in prior studies with another saponin adjuvant and the vaccine also elicited significant anti-neuraminidase antibodies. In October 2014, we announced that the FDA had granted fast track designation to our H7N9 influenza VLP vaccine candidate with Matrix-M. We expect to initiate a Phase 2 clinical trial of our H7N9 influenza VLP vaccine candidate with Matrix-M during the first quarter of 2016.

Potential Accelerated Approval Pathway for Influenza

According to FDA guidance, influenza vaccine developers that can demonstrate results that meet or exceed certain specified immunogenicity endpoint criteria for seroprotection and seroconversion in their clinical trials may, at the FDA’s discretion, be granted a license to market a product prior to submission of traditional clinical endpoint efficacy trial data. This is referred to as “accelerated approval” of a BLA (the biologic equivalent to a New Drug Application). It should be noted that FDA licensure based on accelerated approval requires sponsors to conduct a post-licensure efficacy study to demonstrate the clinical benefit of the vaccine, which would thereby support traditional approval of the vaccine. Because it is not possible to conduct a clinical endpoint efficacy study for a pandemic vaccine in advance of a declared pandemic, FDA’s pandemic guidance allows for submission of seasonal influenza clinical efficacy data for the purpose of confirming clinical benefit of a pandemic vaccine manufactured by the same process. Thus, the demonstration of efficacy with a seasonal vaccine provides a key link between the seasonal and pandemic programs. Accelerated approval further necessitates a shortage of influenza vaccine relative to the total population recommended to receive such vaccine, a situation that persists with seasonal influenza vaccines.

Although we have not ruled out this accelerated approval approach, particularly for our pandemic influenza program or certain populations within our seasonal influenza program, we do not expect to pursue accelerated approval of our quadrivalent seasonal influenza VLP vaccine candidate, largely because of the uncertainty as to whether the accelerated approval pathway will be available to us at the time of our BLA submission and the unknown ability of current and new influenza strains to meet such accelerated approval criteria. We are planning, therefore, to pursue traditional licensure of our quadrivalent seasonal influenza VLP vaccine candidate by conducting a clinical endpoint efficacy study for the purpose of submitting the data within the original BLA. These efficacy data will also support the requirement for clinical efficacy data for our pandemic vaccine program. We plan to discuss with the FDA our licensure pathways (both the traditional pathway for seasonal and possible accelerated pathways for pandemic and certain populations within the seasonal program) during future formal meetings. The likely impact of such an efficacy trial would be an additional year or more before the FDA grants licensure to our quadrivalent seasonal influenza VLP vaccine candidate.

HHS BARDA Contract for Recombinant Influenza Vaccines

HHS BARDA awarded us a contract in 2011, which funds the development of both our multivalent seasonal influenza and pandemic influenza VLP vaccine candidates. Our contract with HHS BARDA is a cost-plus-fixed-fee contract, which reimburses us for allowable direct contract costs incurred plus allowable indirect costs and a fixed-fee earned in the ongoing clinical development and product scale-up of our multivalent seasonal and monovalent pandemic influenza vaccines. In September 2014, we announced that HHS BARDA had exercised and initiated a two-year option to our contract, which not only extended the contract until September 2016, but also added scope to support our development activities leading up to planned Phase 3 clinical studies and $70 million of funding on top of the remainder of the $97 million base period funding. In June 2015, the contract was amended to increase the funding by $7.7 million to allow for the recovery of additional costs under the contract relating to the settlement of indirect rates for fiscal years 2011 and 2012. This additional amount was received and recorded as revenue in the three months ended June 30, 2015. During the six months ended June 30, 2015, we recognized revenue of $23.0 million and have recognized approximately $101 million in revenue since the inception of the contract.

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Other

Ebola Virus (EBOV)

Beginning in 2014, a number of news reports have centered around EBOV, formerly known as Ebola hemorrhagic fever, which is a severe, often fatal illness in humans. Five strains of EBOV have been identified, the most recent of which, the 2014 Guinea-based EBOV strain, is associated with a case fatality rate of 50% to 90%. There are currently no licensed treatments proven to neutralize the virus, but a range of blood, immunological and drug therapies are under development. Despite the development of such therapies, current vaccine approaches target either a previous strain of the virus or were initially developed to be delivered by genetic vectors. Our EBOV glycoprotein (“GP”) vaccine candidate, which was modeled using the 2014 Guinea-based EBOV strain, has been successfully tested in rodent, rabbit, and non-human primate preclinical models. We have also tested the vaccine with our Matrix-M adjuvant, which appears to significantly contribute to enhanced immunogenicity and dose-sparing.

In July 2015, we announced preliminary data from our Phase 1 clinical trial of our EBOV GP vaccine candidate in ascending doses, with and without our Matrix-M adjuvant, in 150 healthy adults that we initiated in February 2015. Participants received either one or two intramuscular injections ranging from 6.5µg to 50µg of antigen. Immunogenicity was assessed at multiple time points, including days 28 and 35. These Phase 1 data show that our EBOV GP vaccine candidate is highly immunogenic, well-tolerated and, in conjunction with our proprietary Matrix-M adjuvant, resulted in significant antigen dose-sparing. Although the adjuvanted Ebola GP vaccine candidate was highly immunogenic at all dose levels, the adjuvanted two-dose regimens induced Ebola anti-GP antibody geometric mean responses between 45,000 and 70,000 ELISA units, representing a 500 to 750-fold rise over baseline at day 35. In addition, in the first quarter of 2015 we announced successful preliminary data from two separate non-human primate challenge studies of our EBOV GP vaccine candidate in which, in both cases, the challenge was lethal for the control animal, whereas 100% of the immunized animals were protected. Large-scale global clinical trials towards licensure of our EBOV GP vaccine will be developed based on the published results of our Phase 1 clinical trial and in collaboration with global regulatory authorities and world health agencies.

Combination Respiratory (Influenza and RSV)

Given the ongoing development of our quadrivalent seasonal influenza VLP vaccine candidate and our RSV F Vaccine, we see an important opportunity to develop a combination respiratory vaccine candidate. This opportunity presents itself most evidently in the elderly, although we have not ruled out developing a combination respiratory vaccine for the non-elderly. Early preclinical development efforts have given us confidence that such a combination vaccine is viable and in animal models, provides acceptable immunogenicity. We intend to explore this development opportunity by conducting a Phase 1 clinical trial in such a combination vaccine.

CPLB Programs (India)

Seasonal Influenza

CPLB completed its Phase 3 clinical trial of its recombinant trivalent seasonal VLP influenza vaccine candidate in 2014 and filed for regulatory market authorization, the Indian equivalent of a BLA, in the second quarter of 2015. As part of its strategy to establish a regulatory pathway for the recombinant trivalent seasonal VLP influenza vaccine, CPLB had previously completed a Phase 3 clinical trial of its monovalent H1N1 seasonal influenza vaccine in 2014, and subsequently filed for and received regulatory approval in the first quarter of 2015. While this marks the first approval of a Novavax VLP vaccine, the market for seasonal influenza vaccines is dominated by multivalent vaccines and there are no current expectations for sales from CPLB’s monovalent H1N1 seasonal product.

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Rabies

CPLB completed Stage II of its Phase 1/2 clinical trial in India of a rabies G protein vaccine candidate that we genetically engineered. The objective was to develop a recombinant vaccine that can be administered both as a pre-exposure prophylaxis for residents of certain higher-risk geographies and travelers to such locations, and as a post-exposure prophylaxis using fewer doses than the current standard of care. In October 2014, CPLB presented clinical results from Stage I of the Phase 1/2 clinical trial, demonstrating that all vaccine recipients, at various doses levels and schedules, showed seroprotective antibody levels at day 14 that were sustained through day 180. The vaccine candidate, which was found to be safe and well-tolerated, also induced seroprotective levels with two-dose and three-dose regimens. With positive clinical data from Stage II of the Phase 1/2 clinical trial, CPLB expects to file an application to initiate a Phase 3 clinical trial in late 2015 or early 2016.

Discovery Programs

Our vaccine platform technology provides an efficient system to rapidly develop antigens to selected targets, refine manufacturing processes and optimize development across multiple vaccine candidates. We pay close attention to global reports of emerging diseases for which there do not appear to be immediate cures and where a vaccine protocol could offer potential protection. In addition to our response to the A(H7N9) influenza strain (as previously discussed), we have been monitoring reports concerning MERS, a novel coronavirus first identified in 2012. MERS became a potential emerging threat in 2013 and is currently being monitored by global health agencies, with the WHO currently reporting more than 1,300 confirmed cases of infection and more than 480 deaths. The MERS virus is a part of the coronavirus family that includes the severe acute respiratory syndrome coronavirus (“SARS”). Because of the public health priority given to MERS, within weeks of getting the virus’ sequence, we successfully produced a vaccine candidate designed to provide protection against MERS. This vaccine candidate, which was made using our recombinant nanoparticle vaccine technology, is based on the major surface spike protein, which we had earlier identified as the antigen of choice in our work with a SARS vaccine candidate. In April 2014, in collaboration with the University of Maryland, School of Medicine, we published results that showed our investigational vaccine candidates against both MERS and SARS blocked infection in laboratory studies. Although the development of a MERS vaccine candidate currently remains a preclinical program, we believe that our MERS vaccine candidate offers a viable option to interested global public health authorities.

Sales of Common Stock

In March 2015, we completed a public offering of 27,758,620 shares of our common stock, including 3,620,689 shares of common stock that were issued upon the exercise in full of the option to purchase additional shares granted to the underwriters, at a price of $7.25 per share resulting in net proceeds of approximately $190 million.

In June 2014, we completed a public offering of 28,750,000 shares of our common stock, including 3,750,000 shares of common stock that were issued upon the exercise in full of the option to purchase additional shares granted to the underwriters, at a price of $4.00 per share resulting in net proceeds of approximately $108 million.

In 2012, we entered into an At Market Issuance Sales Agreement (“Sales Agreement”), under which our Board of Directors (the “Board”) approved the sale of up to an aggregate of $50 million in gross proceeds of our common stock. The shares of common stock have been offered pursuant to a shelf registration statement filed with the SEC in March 2013, which replaced the previous shelf registration statement filed in 2010. The Board’s standing Finance Committee (the “Committee”) assisted with its responsibilities to monitor, provide advice to our senior management and approve all capital raising activities. In doing so, the Committee set the amount of shares to be sold, the period of time during which such sales may occur and the minimum sales price per share. During the six months ended June 30, 2015, we sold 0.8 million shares at an average sales price of $10.01 per share, resulting in approximately $8 million in net proceeds, of which $0.7 million was received in July 2015 upon settlement. In July 2015, we sold the remaining $6.6 million of common stock (0.6 million shares at an average sales price of $11.53 per share) under the Sales Agreement. The Sales Agreement has thus been fully utilized.

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Critical Accounting Policies and Use of Estimates

There are no material changes to our critical accounting policies as described in Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2014, as filed with the SEC.

Recent Accounting Pronouncements Not Yet Adopted

We have considered the applicability and impact of all Financial Accounting Standards Board’s (“FASB”) Accounting Standards Updates (ASUs). In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance under Topic 605, Revenue Recognition. The new standard requires a company to recognize revenue when it transfers goods and services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. ASU 2014-09 defines a five-step process that includes identifying the contract with the customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations in the contract and recognizing revenue when (or as) the entity satisfies the performance obligations. In July 2015, the FASB approved a one-year deferral of the effective date of the new standard to 2018 for public companies, with an option that would permit companies to adopt the new standard as early as the original effective date of 2017. Early adoption prior to the original effective date is not permitted. We are evaluating the potential impact that ASU 2014-09 will have on our consolidated financial position and results of operations.

Results of Operations

The following is a discussion of the historical financial condition and results of operations of the Company and should be read in conjunction with the financial statements and notes thereto set forth in this Quarterly Report.

Three Months Ended June 30, 2015 and 2014 (amounts in tables are presented in thousands, except per share information)

Revenue:

	Three Months Ended June 30,
	2015		2014		Change 2014 to 2015
Revenue:
Total revenue	$	13,996	$	8,259	$	5,737

Revenue for the three months ended June 30, 2015 was $14.0 million as compared to $8.3 million for the same period in 2014, an increase of $5.7 million or 69%. Revenue for the three months ended June 30, 2015 and 2014 is primarily comprised of services performed under the HHS BARDA contract, and to a much lesser extent, the prior PATH clinical development agreement. The increase in revenue is due to revenue of $7.7 million relating to the recovery of additional costs under the HHS BARDA contract for the settlement of indirect rates for fiscal years 2011 and 2012 in the three months ended June 30, 2015. This increase in revenue was partially offset by a lower level of activity in the three months ended June 30, 2015 associated with our Phase 2 seasonal influenza clinical trial as compared to our Phase 1/2 clinical trial of our H7N9 pandemic VLP candidate in the same period in 2014 under the HHS BARDA contract and a decrease in revenue under the prior PATH clinical development agreement.

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For 2015, we expect an increase in revenue primarily due to the recovery of additional costs under the HHS BARDA contract for the settlement of indirect rates for fiscal years 2011 and 2012.

Costs and Expenses:

	Three Months Ended June 30,
	2015		2014		Change 2014 to 2015
Costs and Expenses:
Cost of government contracts revenue	$	2,687	$	5,102	$	(2,415	)
Research and development		25,042		15,202		9,840
General and administrative		7,088		5,806		1,282
Total costs and expenses	$	34,817	$	26,110	$	8,707

Cost of Government Contracts Revenue

Cost of government contracts revenue includes direct costs of salaries, laboratory supplies, consultants and subcontractors and other direct costs associated with our process development, manufacturing, clinical, regulatory and quality assurance activities under research contracts. Cost of government contracts revenue decreased to $2.7 million for the three months ended June 30, 2015 from $5.1 million for the same period in 2014, a decrease of $2.4 million, or 47%. The decrease in cost of government contracts revenue is primarily related to a lower level of activity in the three months ended June 30, 2015 associated with our Phase 2 seasonal influenza clinical trial as compared to our Phase 1/2 clinical trial of our H7N9 pandemic VLP candidate in the same period in 2014. For 2015, we expect a decrease in cost of government contracts revenue primarily due to lower level of project development activities under our HHS BARDA contract in 2015 as compared to 2014.

Research and Development Expenses

Research and development expenses include salaries, laboratory supplies, consultants and subcontractors and other expenses associated with our process development, manufacturing, clinical, regulatory and quality assurance activities for internally funded programs. In addition, indirect costs, such as fringe benefits and overhead expenses, are also included in research and development expenses. Research and development expenses increased to $25.0 million for the three months ended June 30, 2015 from $15.2 million for the same period in 2014, an increase of $9.8 million, or 65%. The increase in research and development expenses was primarily due to increased costs associated with our ongoing RSV F Vaccine clinical trials and our EBOV GP vaccine clinical trial and higher employee-related costs, as compared to the same period in 2014. For 2015, we expect a significant increase in research and development expenses primarily due to additional RSV F Vaccine clinical trials, the EBOV GP vaccine clinical trial and employee-related and facility costs to support product development of our RSV F Vaccine and other potential vaccine candidates.

Costs and Expenses by Functional Area

We track our cost of government contracts revenue and research and development expenses by the type of costs incurred in identifying, developing, manufacturing and testing vaccine candidates. We evaluate and prioritize our activities according to functional area and therefore believe that project-by-project information would not form a reasonable basis for disclosure to our investors. At June 30, 2015, we had 313 employees dedicated to our research and development programs versus 199 employees as of June 30, 2014. Historically, we did not account for internal research and development expenses by project, since our employees work time is spread across multiple programs, and our internal manufacturing clean-room facility produces multiple vaccine candidates.

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The following summarizes our cost of government contracts revenue and research and development expenses by functional area for the three months ended June 30 (in millions).

	2015		2014
Manufacturing	$	18.3	$	12.1
Vaccine Discovery		1.5		1.5
Clinical and Regulatory		7.9		6.7
Total cost of government contracts revenue and research and development expenses	$	27.7	$	20.3

We do not provide forward-looking estimates of costs and time to complete our research programs due to the many uncertainties associated with vaccine development. As we obtain data from preclinical studies and clinical trials, we may elect to discontinue or delay clinical trials in order to focus our resources on more promising vaccine candidates. Completion of clinical trials may take several years or more, but the length of time can vary substantially depending upon the phase, size of clinical trial, primary and secondary endpoints and the intended use of the vaccine candidate. The cost of clinical trials may vary significantly over the life of a project as a result of a variety of factors, including: the number of patients who participate in the clinical trials and the specific patient population; the number of sites included in the clinical trials; whether clinical trial locations are domestic, international or both; the time to enroll patients; the duration of treatment and follow-up; the safety and efficacy profile of the vaccine candidate; and the cost and timing of, and the ability to secure, regulatory approvals.

As a result of these uncertainties, we are unable to determine with any significant degree of certainty the duration and completion costs of our research and development projects or when, and to what extent, we will generate future cash flows from our research projects.

General and Administrative Expenses

General and administrative expenses increased to $7.1 million for the three months ended June 30, 2015 from $5.8 million for the same period in 2014, an increase of $1.3 million, or 22%. The increase was primarily due to higher employee-related costs, as compared to the same period in 2014. At June 30, 2015, we had 43 employees dedicated to general and administrative functions versus 29 employees as of June 30, 2014. For 2015, we expect general and administrative expenses to increase primarily due to increased employee costs and pre-commercialization activities.

Other Income (Expense):

	Three Months Ended June 30,
	2015			2014			Change 2014 to 2015
Other Income (Expense):
Investment income	$	134		$	20		$	114
Interest expense		(26	)		(51	)		25
Other income		72			18			54
Total other income (expense)	$	180		$	(13	)	$	193

We had total other income of $0.2 million for the three months ended June 30, 2015 as compared to total other expense of less than $0.1 million for the same period in 2014.

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Net Loss:

	Three Months Ended June 30,
	2015			2014			Change 2014 to 2015
Net Loss:
Net loss	$	(20,641	)	$	(17,864	)	$	(2,777	)
Net loss per share	$	(0.08	)	$	(0.08	)	$	―
Weighted shares outstanding		268,083			217,178			50,905

Net loss for the three months ended June 30, 2015 was $20.6 million, or $0.08 per share, as compared to $17.9 million, or $0.08 per share, for the same period in 2014, an increased net loss of $2.8 million. The increased net loss was primarily due to higher research and development spending, including increased costs relating to clinical trials of our RSV F Vaccine and a clinical trial of our EBOV GP vaccine candidate and higher employee-related costs, as compared to the same period in 2014.

The increase in weighted average shares outstanding for the three months ended June 30, 2015 as compared to the same period in 2014 is primarily a result of sales of our common stock in 2015 and 2014.

Six Months Ended June 30, 2015 and 2014 (amounts in tables are presented in thousands, except per share information)

Revenue:

	Six Months Ended June 30,
	2015		2014		Change 2014 to 2015
Revenue:
Total revenue	$	23,872	$	15,721	$	8,151

Revenue for the six months ended June 30, 2015 was $23.9 million as compared to $15.7 million for the same period in 2014, an increase of $8.2 million or 52%. Revenue for the six months ended June 30, 2015 and 2014 is primarily comprised of services performed under the HHS BARDA contract, and to a much lesser extent, the prior PATH clinical development agreement. The increase in revenue is primarily due to revenue of $7.7 million relating to the recovery of additional costs for the settlement of indirect rates for fiscal years 2011 and 2012 under the HHS BARDA contract in the three months ended June 30, 2015 and revenue of $3.1 million relating to our Phase 2 clinical trial of our quadrivalent seasonal influenza VLP vaccine candidate in Australia (“205 Trial”) as collection of the amount became reasonably assured in the first quarter of 2015. These increases in revenue were partially offset by a decrease in revenue under the prior PATH clinical development agreement.

In 2012, HHS BARDA withheld payment on the outside costs of the 205 Trial. Such outside costs were recorded as expenses in the period incurred as a cost of government contracts revenue and the Company did not record revenue relating to such outside costs prior to the first quarter of 2015 because collection of the amount was not reasonably assured. In late 2014, the U.S. Food and Drug Administration, Center for Biologics Evaluation and Research (“FDA”) accepted the data from the 205 Trial as part of the Company’s investigational new drug (“IND”) application for its seasonal quadrivalent influenza VLP vaccine candidate. In the first quarter of 2015, HHS BARDA approved the reimbursement of the 205 Trial costs. We also collected this amount in 2015.

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Costs and Expenses:

	Six Months Ended June 30,
	2015		2014		Change 2014 to 2015
Costs and Expenses:
Cost of government contracts revenue	$	5,307	$	8,123	$	(2,816	)
Research and development		50,769		29,720		21,049
General and administrative		12,931		10,114		2,817
Total costs and expenses	$	69,007	$	47,957	$	21,050

Cost of Government Contracts Revenue

Cost of government contracts revenue includes direct costs of salaries, laboratory supplies, consultants and subcontractors and other direct costs associated with our process development, manufacturing, clinical, regulatory and quality assurance activities under research contracts. Cost of government contracts revenue decreased to $5.3 million for the six months ended June 30, 2015 from $8.1 million for the same period in 2014, a decrease of $2.8 million, or 35%. The decrease in cost of government contracts revenue is primarily related to a lower level of activity in the six months ended June 30, 2015 associated with our Phase 2 seasonal influenza clinical trial as compared to our Phase 1/2 clinical trial of our H7N9 pandemic VLP candidate in the same period in 2014.

Research and Development Expenses

Research and development expenses include salaries, laboratory supplies, consultants and subcontractors and other expenses associated with our process development, manufacturing, clinical, regulatory and quality assurance activities for internally funded programs. In addition, indirect costs, such as fringe benefits and overhead expenses, are also included in research and development expenses. Research and development expenses increased to $50.8 million for the six months ended June 30, 2015 from $29.7 million for the same period in 2014, an increase of $21.0 million, or 71%. The increase in research and development expenses was primarily due to increased costs associated with our ongoing RSV F Vaccine clinical trials and our EBOV GP vaccine clinical trial and higher employee-related costs, as compared to the same period in 2014. At June 30, 2015, we had 313 employees dedicated to our research and development programs versus 199 employees as of June 30, 2014.

Costs and Expenses by Functional Area

The following summarizes our cost of government contracts revenue and research and development expenses by functional area for the six months ended June 30 (in millions).

	2015		2014
Manufacturing	$	35.6	$	22.4
Vaccine Discovery		3.2		2.8
Clinical and Regulatory		17.3		12.6
Total cost of government contracts revenue and research and development expenses	$	56.1	$	37.8

General and Administrative Expenses

General and administrative expenses increased to $12.9 million for the six months ended June 30, 2015 from $10.1 million for the same period in 2014, an increase of $2.8 million, or 28%. The increase was primarily due to higher employee-related costs, as compared to the same period in 2014. At June 30, 2015, we had 43 employees dedicated to general and administrative functions versus 29 employees as of June 30, 2014.

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Other Income (Expense):

	Six Months Ended June 30,
	2015			2014			Change 2014 to 2015
Other Income (Expense):
Investment income	$	256		$	32		$	224
Interest expense		(62	)		(103	)		41
Other income (expense)		(70	)		18			(88	)
Realized gains on marketable securities		―			615			(615	)
Total other income (expense)	$	124		$	562		$	(438	)

We had total other income of $0.1 million for the six months ended June 30, 2015 as compared to total other income of $0.6 million for the same period in 2014. For the six months ended June 30, 2014, we sold our remaining auction rate security and received proceeds of $1.8 million resulting in a realized gain of $0.6 million.

Net Loss:

	Six Months Ended June 30,
	2015			2014			Change 2014 to 2015
Net Loss:
Net loss	$	(45,011	)	$	(31,674	)	$	(13,337	)
Net loss per share	$	(0.18	)	$	(0.15	)	$	(0.03	)
Weighted shares outstanding		254,727			213,075			41,652

Net loss for the six months ended June 30, 2015 was $45.0 million, or $0.18 per share, as compared to $31.7 million, or $0.15 per share, for the same period in 2014, an increased net loss of $13.3 million. The increased net loss was primarily due to higher research and development spending, including increased costs relating to clinical trials of our RSV F Vaccine and a clinical trial of our EBOV GP vaccine candidate and higher employee-related costs, as compared to the same period in 2014.

The increase in weighted average shares outstanding for the six months ended June 30, 2015 as compared to the same period in 2014 is primarily a result of sales of our common stock in 2015 and 2014.

Liquidity Matters and Capital Resources

Our future capital requirements depend on numerous factors including, but not limited to, the commitments and progress of our research and development programs, the progress of preclinical and clinical testing, the time and costs involved in obtaining regulatory approvals, the costs of filing, prosecuting, defending and enforcing patent claims and other intellectual property rights and manufacturing costs. We plan to continue to have multiple vaccines and products in various stages of development, and we believe our operating expenses and capital requirements will fluctuate depending upon the timing of certain events, such as the scope, initiation, rate and progress of our preclinical studies and clinical trials and other research and development activities.

As of June 30, 2015, we had $314.9 million in cash and cash equivalents and marketable securities as compared to $168.1 million as of December 31, 2014. These amounts consisted of $167.4 million in cash and cash equivalents and $147.6 million in marketable securities as of June 30, 2015 as compared to $32.3 million in cash and cash equivalents and $135.7 million in marketable securities, as described in Note 3 under section “Marketable Securities,” as of December 31, 2014.

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The following table summarizes cash flows for the six months ended June 30, 2015 and 2014 (in thousands):

	Six Months Ended June 30,
	2015			2014			Change 2014 to 2015
Summary of Cash Flows:
Net cash (used in) provided by:
Operating activities	$	(42,812	)	$	(31,372	)	$	(11,440	)
Investing activities		(21,619	)		(93,080	)		71,461
Financing activities		199,560			108,868			90,692
Effect on exchange rate on cash and cash equivalents		(80	)		(30	)		(50	)
Net increase (decrease) in cash and cash equivalents		135,049			(15,614	)		150,663
Cash and cash equivalents at beginning of period		32,335			119,471			(87,136	)
Cash and cash equivalents at end of period	$	167,384		$	103,857		$	63,527

Net cash used in operating activities increased to $42.8 million for the six months ended June 30, 2015 as compared to $31.4 million for the same period in 2014. The increase in cash usage was primarily due to increased costs relating to our RSV F Vaccine and EBOV GP vaccine candidate, higher employee-related costs and timing of customer and vendor payments.

During the six months ended June 30, 2015 and 2014, our investing activities consisted primarily of purchases and maturities of marketable securities and capital expenditures. Capital expenditures for the six months ended June 30, 2015 and 2014 were $9.2 million and $1.8 million, respectively. The increase in capital expenditures was primarily due to the purchase of laboratory equipment for process development, analytical development and manufacturing scale-up required to support our maturing product portfolio. In 2015, we expect our level of capital expenditures to be significantly higher than our 2014 spending as we continue to scale up our capacity in anticipation of Phase 3 clinical trials and related regulatory obligations in the upcoming years.

Our financing activities consisted primarily of sales of our common stock, and to a lesser extent, stock option exercises and purchases under our employee stock purchase plan. In the six months ended June 30, 2015, we received net proceeds of approximately $190 million through our public offering at $7.25 per share and approximately $8 million through our Sales Agreement ($0.7 million was received in July 2015 upon settlement) at an average sales price of $10.01 per share. In the six months ended June 30, 2014, we received net proceeds of approximately $108 million through our public offering at $4.00 per share. We sold the remaining $6.6 million of common stock (0.6 million shares at an average sales price of $11.53 per share) under the Sales Agreement in July 2015. The Sales Agreement has thus been fully utilized.

In 2007, we entered into an agreement to license certain rights from Wyeth. The Wyeth license is a non-exclusive, worldwide license to a family of patents and patent applications covering VLP technology for use in human vaccines in certain fields, with expected patent expiration in early 2022. The Wyeth license provides for us to make an upfront payment (previously made), ongoing annual license fees, sublicense payments, milestone payments on certain development activities and royalties on any product sales. The milestone payments are one-time only payments applicable to each related vaccine program. At present, our seasonal influenza VLP vaccine program (including CPLB’s seasonal influenza program) and our pandemic influenza VLP vaccine program are the only two programs to which the Wyeth license applies. The license may be terminated by Wyeth only for cause and may be terminated by us only after we have provided ninety (90) days’ notice that we have absolutely and finally ceased activity, including through any affiliate or sublicense, related to the manufacturing, development, marketing or sale of products covered by the license. Payments under the agreement to Wyeth from 2007 through June 30, 2015 totaled $6.4 million. We are currently in discussion with Wyeth to potentially amend the agreement and restructure the milestone payment owed as a result of CPLB’s initiation of a Phase 3 clinical trial for its seasonal influenza VLP vaccine candidate in the third quarter of 2014. Such milestone payment is only owed once for our seasonal influenza VLP vaccine program and we would not be required to pay again if we or any of our affiliates initiate an additional Phase 3 clinical trial in a seasonal influenza VLP vaccine candidate. The $3.0 million milestone continues to be accrued for on the consolidated balance sheet at June 30, 2015 and was recorded as a research and development expense in the third quarter of 2014.

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In connection with CPLB, we entered into a master services agreement with Cadila, which we and Cadila amended in July 2011, March 2013, March 2014 and February 2015, in each case to extend the term by one year for which services can be provided by Cadila under this agreement. Under the revised terms, if, by March 2016, the amount of services provided by Cadila under the master services agreement is less than $7.5 million, we will pay Cadila the portion of the shortfall amount that is less than or equal to $2.0 million. The Company and Cadila have also agreed to an amendment that allows CPLB, as of the beginning of 2013, to provide services on behalf of Cadila. Through June 30, 2015, we have purchased $6.7 million in services from Cadila pursuant to this agreement, including amounts in which CPLB provided the services on behalf of Cadila.

Based on our June 30, 2015 cash and cash equivalents and marketable securities balances, along with anticipated revenue under the contract with HHS BARDA and other resources, we believe we have adequate capital to fund our operating plans for a minimum of twelve months. Additional capital may be required in the future to develop our vaccine candidates through clinical development, manufacturing and commercialization. Our ability to obtain such additional capital will likely be subject to various factors, including our ability to perform and thus generate revenue under the HHS BARDA contract, our overall business performance and market conditions. 

Any capital raised by an equity offering will likely be substantially dilutive to the existing stockholders and any licensing or development arrangement may require us to give up rights to a product or technology at less than its full potential value. We cannot provide any assurance that new financing will be available on commercially acceptable terms, if at all. If we are unable to perform under the HHS BARDA contract or obtain additional capital, we will assess our capital resources and may be required to delay, reduce the scope of, or eliminate one or more of our product research and development programs, and/or downsize our organization, including our general and administrative infrastructure.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

The primary objective of our investment activities is preservation of capital, with the secondary objective of maximizing income. As of June 30, 2015, we had cash and cash equivalents of $167.4 million, marketable securities of $147.6 million, all of which are short-term, and working capital of $305.9 million.

Our exposure to market risk is primarily confined to our investment portfolio. As of June 30, 2015, our investments were classified as available-for-sale. We do not believe that a change in the market rates of interest would have any significant impact on the realizable value of our investment portfolio. Changes in interest rates may affect the investment income we earn on our marketable securities when they mature and the proceeds are reinvested into new marketable securities and, therefore, could impact our cash flows and results of operations.

Interest and dividend income is recorded when earned and included in investment income. Premiums and discounts, if any, on marketable securities are amortized or accreted to maturity and included in investment income. The specific identification method is used in computing realized gains and losses on the sale of our securities.

We are headquartered in the U.S. where we conduct the vast majority of our business activities. We have one foreign consolidated subsidiary, Novavax AB, which is located in Sweden. A 10% decline in the exchange rate between the U.S. dollar and Swedish Krona would result in a reduction of stockholders’ equity of approximately $2.9 million at June 30, 2015.

We do not have material debt and, as such, do not believe that we are exposed to any material interest rate risk as a result of our borrowing activities.

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Item 4.  Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the assistance of our chief executive officer and chief financial officer, has reviewed and evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of June 30, 2015. 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. Our disclosure controls and procedures are designed to provide reasonable assurance of achieving such control objectives. 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 effective.

Changes in Internal Control over Financial Reporting

Our management, including our chief executive officer and chief financial officer, has evaluated any changes in our internal control over financial reporting that occurred during the quarterly period ended June 30, 2015, and has concluded that there was no change that occurred during the quarterly period ended June 30, 2015 that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

Item 1A. Risk Factors

Other than the additional risk factors disclosed below, there are no material changes to the Company’s risk factors as described in Item 1A of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2014.

Security breaches and other disruptions could compromise our information and expose us to liability, which would cause our business and reputation to suffer.

In the ordinary course of our business, we collect and store sensitive data, including intellectual property, our proprietary business information and data about our clinical subjects, suppliers, and business partners, and personally identifiable information. The secure maintenance of this information is critical to our operations and business strategy. Some of this information could be an attractive target of criminal attack by malicious third parties with a wide range of motives and expertise, including organized criminal groups, “hactivists,” patient groups, disgruntled current or former employees, and others. Hacker attacks are of ever-increasing levels of sophistication, and despite our security measures, our information technology and infrastructure may be vulnerable to such attacks or may be breached due to employee error or malfeasance. Any such breach could compromise our networks and the information stored there could be accessed, publicly disclosed, lost or stolen. Furthermore, if our systems become compromised, we may not promptly discover the intrusion. Like other companies in our industry, we have experienced attacks to our data and systems, including malware and computer viruses. Attacks could have a material impact on our business, operations or financial results. Any access, disclosure or other loss of information could result in legal claims or proceedings, liability under laws that protect the privacy of personal information, disrupt our operations, and damage our reputation, which could adversely affect our business.

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Item 6.  Exhibits

3.1*	Second Amended and Restated Certificate of Incorporation of the Company
3.2	Amended and Restated By-Laws of the Company (Incorporated by reference to Exhibit 3.2 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2012, filed March 12, 2013)
10.1** *	Contract Amendment/Modification No. 8 between Novavax, Inc. and HHS/OS/ASPR/BARDA, dated June 5, 2015
10.2†	Novavax, Inc. 2015 Stock Incentive Plan (Incorporated by reference to Appendix B of the Company’s Definitive Proxy Statement filed April 30, 2015 in connection with the Annual Meeting held on June 18, 2015)
10.3†*	Form of Non-Statutory Stock Option Award Agreement granted under the Novavax, Inc. 2015 Stock Incentive Plan
10.4†*	Form of Incentive Stock Option Award Agreement granted under the Novavax, Inc. 2015 Stock Incentive Plan
10.5†*	Form of Restricted Stock Award Agreement granted under the Novavax, Inc. 2015 Stock Incentive Plan
31.1*	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) or 15d-14(e) of the Securities Exchange Act
31.2*	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) or 15d-14(e) of the Securities Exchange Act
32.1*	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2*	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101	The following financial information from our Quarterly Report on Form 10-Q for the quarter ended June 30, 2015, formatted in Extensible Business Reporting Language (XBRL): (i) the Consolidated Balance Sheets as of June 30, 2015 and December 31, 2014, (ii) the Consolidated Statements of Operations for the three and six-month periods ended June 30, 2015 and 2014, (iii) the Consolidated Statements of Comprehensive Loss for the three and six-month periods ended June 30, 2015 and 2014, (iv) the Consolidated Statements of Cash Flows for the six-month periods ended June 30, 2015 and 2014, and (v) the Notes to Consolidated Financial Statements.

__________________

* Filed herewith.

† Indicates management contracts, compensatory plans, or arrangements.

** Confidential treatment has been requested for portions of exhibit.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	NOVAVAX, INC.
Date: August 10, 2015	By:	/s/ Stanley C. Erck
		President and Chief Executive Officer
		and Director
		(Principal Executive Officer)
Date: August 10, 2015	By:	/s/ Barclay A. Phillips
		Senior Vice President, Chief Financial Officer and Treasurer
		(Principal Financial and Accounting Officer)

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EX-3.1

Exhibit 3.1 

SECOND AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

NOVAVAX, INC.

NOVAVAX, INC. (the "Corporation"), a corporation originally organized and incorporated under the name MPS, Inc. by the filing of a Certificate of Incorporation in the office of the Secretary of State of the State of Delaware on June 18, 1987, as amended by a Certificate of Amendment dated July 30, 1987 and filed in the Office of the Secretary of State of the State of Delaware on August 3, 1987, a Certificate of Merger dated February 5, 1988 filed in the Office of the Secretary of State of the State of Delaware on February 9, 1988, a Certificate of Amendment dated October 4, 1991 and filed in the Office of the Secretary of State of the State of Delaware on October 7, 1991, and a Certificate of Amendment dated November 20, 1995 and filed in the Office of the Secretary of State of the State of Delaware on November 20, 1995, amended and restated by an Amended and Restated Certificate of Incorporation of the Corporation dated November 20, 1995 and filed in the Office of the Secretary of State of the State of Delaware on November 20, 1995, as further amended by a Certificate of Amendment dated December 18, 2000 and filed in the Office of the Secretary of State of the State of Delaware on December 18, 2000, a Certificate of Amendment dated July 8, 2004 and filed in the Office of the Secretary of State of the State of Delaware on July 9, 2004, a Certificate of Amendment dated May 13, 2009 and filed in the Office of the Secretary of State of the State of Delaware on May 13, 2009 and a Certificate of Amendment dated June 13, 2013 and filed in the Office of the Secretary of State of the State of Delaware on July 3, 2013, and existing under and by virtue of the General Corporation Law of the State of Delaware, does hereby certify as follows:

The Board of Directors of the Corporation, at a meeting duly held on March 5, 2015, adopted a resolution, pursuant to Sections 242 and 245 of the General Corporation Law of the State of Delaware, setting forth a Second Amended and Restated Certificate of Incorporation of the Corporation and declaring said Second Amended and Restated Certificate of Incorporation advisable. The stockholders of the Corporation duly approved said proposed Second Amended and Restated Certificate of Incorporation by written consent in accordance with Sections 228, 242, and 245 of the General Corporation Law of the State of Delaware, and written notice of such consent has been given to all stockholders who have not consented in writing to said restatement. The resolution setting forth the Second Amended and Restated Certificate of Incorporation is as follows:

RESOLVED: That the Restated Certificate of Incorporation of the Corporation, as amended, be and hereby is amended and restated in its entirety so that the same shall read as follows:

FIRST.          The name of the Corporation is:

Novavax, Inc.

SECOND.     The address of its registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County of New Castle. The name of its registered agent at such address is The Corporation Trust Company.

THIRD.         The nature of the business or purposes to be conducted or promoted by the Corporation is as follows:

  To engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of Delaware.

FOURTH.     The total number of shares of all classes of stock which the Corporation shall have authority to issue is (i) six hundred million (600,000,000) shares of Common Stock, $.01 par value per share ("Common Stock"), and (ii) two million (2,000,000) shares of Preferred Stock, $.01 par value per share ("Preferred Stock"), which may be issued from time to time in one or more series as set forth in Part B of this Article FOURTH.

The following is a statement of the designations and the powers, privileges and rights, and the qualifications, limitations or restrictions thereof in respect of each class of capital stock of the Corporation.

A.           COMMON STOCK.

1.          General. The voting, dividend and liquidation rights of the holders of the Common Stock are subject to and qualified by the rights of the holders of the Preferred Stock of any series as may be designated by the Board of Directors upon any issuance of the Preferred Stock of any series.

2.          Voting. The holders of the Common Stock are entitled to one vote for each share held at all meetings of stockholders (and written actions in lieu of meetings). There shall be no cumulative voting.

The number of authorized shares of Common Stock may be increased or decreased (but not below the number of shares thereof then outstanding) by the affirmative vote of the holders of a majority of the stock of the Corporation entitled to vote, irrespective of the provisions of Section 242(b)(2) of the General Corporation Law of Delaware.

3.          Dividends. Dividends may be declared and paid on the Common Stock from funds lawfully available therefor as and when determined by the Board of Directors and subject to any preferential dividend rights of any then outstanding Preferred Stock.

4.          Liquidation. Upon the dissolution or liquidation of the Corporation, whether voluntary or involuntary, holders of Common Stock will be entitled to receive all assets of the Corporation available for distribution to its stockholders, subject to any preferential rights of any then outstanding Preferred Stock.

B.           PREFERRED STOCK.

Preferred Stock may be issued from time to time in one or more series, each of such series to have such terms as stated or expressed herein and in the resolution or resolutions providing for the issue of such series adopted by the Board of Directors of the Corporation as hereinafter provided. Any shares of Preferred Stock which may be redeemed, purchased or acquired by the Corporation may be reissued except as otherwise provided by law. Differ-ent series of Preferred Stock shall not be construed to constitute different classes of shares for the purposes of voting by classes unless expressly provided.

Authority is hereby expressly granted to the Board of Directors from time to time to issue the Preferred Stock in one or more series, and in connection with the creation of any such series, by resolution or resolutions providing for the issue of the shares thereof, to determine and fix such voting powers, full or limited, or no voting powers, and such designations, preferences and relative participating, optional or other special rights, and qualifications, limitations or restrictions thereof, including without limitation thereof, dividend rights, conversion rights, redemption privileges and liquidation preferences, as shall be stated and expressed in such resolutions, all to the full extent now or hereafter permitted by the General Corporation Law of Delaware. Without limiting the generality of the foregoing, the resolutions providing for issuance of any series of Preferred Stock may provide that such series shall be superior or rank equally or be junior to the Preferred Stock of any other series to the extent permitted by law. Except as otherwise specifically provided in this Certificate of Incorporation, no vote of the holders of the Preferred Stock or Common Stock shall be a prerequisite to the issuance of any shares of any series of the Preferred Stock authorized by and complying with the conditions of the Certificate of Incorporation, the right to have such vote being expressly waived by all present and future holders of the capital stock of the Corporation.

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FIFTH.         The Corporation shall have a perpetual existence.

SIXTH.         In furtherance of and not in limitation of powers conferred by statute, it is further provided that the Board of Directors is expressly authorized to adopt, amend or repeal the By-Laws of the Corporation.

SEVENTH.    Whenever a compromise or arrangement is proposed between this corporation and its creditors or any class of them and/or between this corporation and its stockholders or any class of them, any court of equitable jurisdiction within the State of Delaware may, on the application in a summary way of this corporation or of any creditor or stockholder thereof, or on the application of any receiver or receivers appointed for this corporation under the provisions of section 291 of Title 8 of the Delaware Code or on the application of trustees in dissolution or of any receiver or receivers appointed for this corporation under the provisions of section 279 of Title 8 of the Delaware Code order a meeting of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this corporation, as the case may be, to be summoned in such manner as the said court directs. If a majority in number representing three-fourths in value of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this corporation, as the case may be, agree to any compromise or arrangement and to any promise or arrangement, the said compromise or arrangement and the said reorganization shall, if sanctioned by the court to which the said application has been made, be binding on all the creditors or class of creditors, and/or on all the stockholders or class of stockholders, of this corporation, as the case may be, and also on this corporation.

EIGHTH.       Except to the extent that the General Corporation Law of the State of Delaware prohibits the elimination or limitation of liability of directors for breaches of fiduciary duty, no director of the Corporation shall be personally liable to the Corporation or its stockholders for monetary damages for any breach of fiduciary duty as a director, notwithstanding any provision of law imposing such liability. No amendment to or repeal of this provision shall apply to or have any effect on the liability or alleged liability of any director of the Corporation for or with respect to any acts or omissions of such director occurring prior to such amendment.

NINTH.         1.           Action, Suits and Proceedings Other than by or in the Right of the Corporation. The Corporation shall indemnify each person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the Corporation), by reason of the fact that he is or was, or has agreed to become, a director or officer of the Corporation, or is or was serving, or has agreed to serve, at the request of the Corporation, as a director, officer or trustee of, or in a similar capacity with, another corporation, partnership, joint venture, trust or other enterprise (including any employee benefit plan) (all such persons being referred to hereafter as an "Indemnitee"), or by reason of any action alleged to have been taken or omitted in such capacity, against all expenses (including attorneys' fees) judgment, fines and amounts paid in settlement actually and reasonably incurred by him or on his behalf in connection with such action, suit or proceeding and any appeal therefrom, if he acted in good faith and in a manner he reasonably believed to be in, or not opposed to, the best interests of the Corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe his conduct was unlawful. The termination of any action, suit or proceeding by judgment, order, settlement, conviction or upon a plea of nolo contendere or its equivalent, shall not, of itself, create a presumption that the person did not act in good faith and in a manner which he reasonably believed to be in, or not opposed to, the best interests of the Corporation, and, with respect to any criminal action or proceeding, had reasonable cause to believe that his conduct was unlawful. Notwithstanding anything to the contrary in this Article, except as set forth in Section 6 below, the Corporation shall not indemnify an Indemnitee seeking indemnification in connection with a proceeding (or part thereof) initiated by the Indemnitee unless the initiation thereof was approved by the Board of Directors of the Corporation.

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2.          Actions or Suits by or in the Right of the Corporation. The Corporation shall indemnify any Indemnitee who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the Corporation to procure a judgment in its favor by reason of the fact that he is or was, or has agreed to become, a director or officer of the Corporation, or is or was serving, or has agreed to serve, at the request of the Corporation, as a director, officer or trustee of, or in a similar capacity with, another corporation, partnership, joint venture, trust or other enterprise (including any employee benefit plan), or by reason of any action alleged to have been taken or omitted in such capacity, against all expenses (including attorneys' fees) and amounts paid in settlement actually and reasonably incurred by him or on his behalf in connection with such action, suit or proceeding and any appeal therefrom, if he acted in good faith and in a manner he reasonably believed to be in, or not opposed to, the best interests of the Corporation, except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the Corporation unless and only to the extent that the Court of Chancery of Delaware shall determine upon application that, despite the adjudication of such liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses (including attorneys' fees) which the Court of Chancery of Delaware shall deem proper.

3.          Indemnification for Expenses of Successful Party. Notwithstanding the other provisions of this Article, to the extent that an Indemnitee has been successful, on the merits or otherwise, in defense of any action, suit or proceeding referred to in Sections 1 and 2 of this Article, or in defense of any claim, issue or matter therein, or on appeal from any such action, suit or proceeding, he shall be indemnified against all expenses (including attorneys' fees) actually and reasonably incurred by him or on his behalf in connection therewith. Without limiting the foregoing, if any action, suit or proceeding is disposed of, on the merits or otherwise (including a disposition without prejudice), without (i) the disposition being adverse to the Indemnitee, (ii) an adjudication that the Indemnitee was liable to the Corporation, (iii) a plea of guilty or nolo contendere by the Indemnitee, (iv) an adjudication that the Indemnitee did not act in good faith and in a manner he reasonably believed to be in or not opposed to the best interests of the Corporation, and (v) with respect to any criminal proceeding, an adjudication that the Indemnitee had reasonable cause to believe his conduct was unlawful, the Indemnitee shall be considered for the purposes hereof to have been wholly successful with respect thereto.

4.          Notification and Defense of Claim. As a condition precedent to his right to be indemnified, the Indemnitee must notify the Corporation in writing as soon as practicable of any action, suit, proceeding or investigation involving him for which indemnity will or could be sought. With respect to any action, suit, proceeding or investigation of which the Corporation is so notified, the Corporation will be entitled to participate therein at its own expense and/or to assume the defense thereof at its own expense, with legal counsel reasonably acceptable to the Indemnitee. After notice from the Corporation to the Indemnitee of its election so to assume such defense, the Corporation shall not be liable to the Indemnitee for any legal or other expenses subsequently incurred by the Indemnitee in connection with such claim, other than as provided below in this Section 4. The Indemnitee shall have the right to employ his own counsel in connection with such claim, but the fees and expenses of such counsel incurred after notice from the Corporation of its assumption of the defense thereof shall be at the expense of the Indemnitee unless (i) the employment of counsel by the Indemnitee has been authorized by the Corporation, (ii) counsel to the Indemnitee shall have reasonably concluded that there may be a conflict of interest or position on any significant issue between the Corporation and the Indemnitee in the conduct of the defense of such action or (iii) the Corporation shall not in fact have employed counsel to assume the defense of such action, in each of which cases the fees and expenses of counsel for the Indemnitee shall be at the expense of the Corporation, except as otherwise expressly provided by this Article. The Corporation shall not be entitled, without the consent of the Indemnitee, to assume the defense of any claim brought by or in the right of the Corporation or as to which counsel for the Indemnitee shall have reasonably made the conclusion provided for in clause (ii) above.

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5.          Advance of Expenses. Subject to the provisions of Section 6 below, in the event that the Corporation does not assume the defense pursuant to Section 4 of this Article of any action, suit, proceeding or investigation of which the Corporation receives notice under this Article, any expenses (including attorneys' fees) incurred by an Indemnitee in defending a civil or criminal action, suit, proceeding or investigation or any appeal therefrom shall be paid by the Corporation in advance of the final disposition of such matter; provided, however, that the payment of such expense incurred by an Indemnitee in advance of the final disposition of such matter shall be made only upon receipt of an undertaking by or on behalf of the Indemnitee to repay all amounts so advanced in the event that it shall ultimately be determined that the Indemnitee is not entitled to be indemnified by the Corporation as authorized in this Article. Such undertaking shall be accepted without reference to the financial ability of the Indemnitee to make such repayment.

6.          Procedure for Indemnification. In order to obtain indemnification or advancement of expenses pursuant to Section 1, 2, 3 or 5 of this Article, the Indemnitee shall submit to the Corporation a written request, including in such request such documentation and information as is reasonably available to the Indemnitee and is reasonably necessary to determine whether and to what extent the Indemnitee is entitled to indemnification or advancement of expenses. Any such indemnification or advancement of expenses shall be made promptly, and in any event within 60 days after receipt by the Corporation of the written request of the Indemnitee, unless with respect to requests under Section 1, 2 or 5 the Corporation determines, by clear and convincing evidence, within such 60-day period that the Indemnitee did not meet the applicable standard of conduct set forth in Section 1 or 2, as the case may be. Such determination shall be made in each instance by (a) a majority vote of the directors of the Corporation consisting of persons who are not at that time parties to the action, suit or proceeding in question ("disinterested directors"), even though less than a quorum, (b) a majority vote of a quorum of the outstanding shares of stock of all classes entitled to vote for directors, voting as a single class, which quorum shall consist of stockholders who are not at that time parties to the action, suit or proceeding in question, (c) independent legal counsel (who may be regular legal counsel to the Corporation), or (d) a court of competent jurisdiction.

7.          Remedies. The right to indemnification or advances as granted by this Article shall be enforceable by the Indemnitee in any court of competent jurisdiction if the Corporation denies such request, in whole or in part, or if no disposition thereof is made within the 60-day period referred to above in Section 6. Unless otherwise provided by law, the burden of proving that the Indemnitee is not entitled to indemnification or advanced of expenses under this Article shall be on the Corporation. Neither the failure of the Corporation to have made a determination prior to the commencement of such action that indemnification is proper in the circumstances because the Indemnitee has met the applicable standard of conduct, nor an actual determination by the Corporation pursuant to Section 6 that the Indemnitee has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that the Indemnitee has not met the applicable standard of conduct. The Indemnitee's expenses (including attorneys' fees) incurred in connection with successfully establishing his right to indemnification, in whole or in part, in any such proceeding shall also be indemnified by the Corporation.

8.          Subsequent Amendment. No amendment, termination or repeal of this Article or of the relevant provisions of the General Corporation Law of Delaware or any other applicable laws shall affect or diminish in any way the rights of any Indemnitee to indemnification under the provisions hereof with respect to any action, suit, proceeding or investigation arising out of or relating to any actions, transactions or facts occurring prior to the final adoption of such amendment, termination or repeal.

9.          Other Rights. The indemnification and advancement of expenses provided by this Article shall not be deemed exclusive of any other rights to which an Indemnitee seeking indemnification or advancement of expenses may be entitled under any law (common or statutory), agreement or vote of stockholders or disinterested directors or otherwise, both as to action in his official capacity and as to action in any other capacity while holding office for the Corporation, and shall continue as to an Indemnitee who has ceased to be a director or officer, and shall inure to the benefit of the estate, heirs, executors and administrators of the Indemnitee. Nothing contained in this Article shall be deemed to prohibit, and the Corporation is specifically authorized to enter into, agreements with officers and directors providing indemnification rights and procedures different from those set forth in this Article. In addition, the Corporation may, to the extent authorized from time to time by its Board of Directors, grant indemnification rights to other employees or agents of the Corporation or other persons serving the Corporation and such rights may be equivalent to, or greater or less than, those set forth in this Article.

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10.         Partial Indemnification. If an Indemnitee is entitled under any provision of this Article to indemnification by the Corporation for some or a portion of the expenses (including attorneys' fees), judgments, fines or amounts paid in settlement actually and reasonably incurred by him or on his behalf in connection with any action, suit, proceeding or investigation and any appeal, therefrom but not, however, for the total amount thereof, the Corporation shall nevertheless indemnify the Indemnitee for the portion of such expenses (including attorneys' fees), judgments, fines or amounts paid in settlement to which the Indemnitee is entitled.

11.         Insurance. The Corporation may purchase and maintain insurance, at its expense, to protect itself and any director, officer, employee or agent of the Corporation or another corporation, partnership, joint venture, trust or other enterprise (including any employee benefit plan) against any expense, liability or loss incurred by him in any such capacity, or arising out of his status as such, whether or not the Corporation would have the power to indemnify such person against such expense, liability or loss under the General Corporation law of Delaware.

12.         Merger or Consolidation. If the Corporation is merged into or consolidated with another corporation and the Corporation is not the surviving corporation, the surviving corporation shall assume the obligations of the Corporation under this Article with respect to any action, suit, proceeding or investigation arising out of or relating to any actions, transactions or facts occurring prior to the date of such merger or consolidation.

13.         Savings Clause. If this Article or any portion hereof shall be invalidated on any ground by any court of competent jurisdiction, then the Corporation shall nevertheless indemnify each Indemnitee as to any expenses (including attorneys' fees) judgments, fines and amounts paid in settlement in connection with any action, suit, proceeding or investigation, whether civil, criminal or administrative, including an action by or in the right of the Corporation, to the fullest extent permitted by any applicable portion of this Article that shall not have been invalidated and to the fullest extent permitted by applicable law.

14.         Definitions. Terms used herein and defined in Section 145(h) and Section 145(i) of the General Corporation Law of Delaware shall have the respective meanings assigned to such terms in such Section 145(h) and Section 145(i).

15.         Subsequent Legislation. If the General Corporation Law of Delaware is amended after adoption of this Article to expand further the indemnification permitted to Indemnitees, then the Corporation shall indemnify such persons to the fullest extent permitted by the General Corporation Law of Delaware, as so amended.

TENTH. The Corporation reserves the right to amend, alter, change or repeal any provision contained in this Second Amended and Restated Certificate of Incorporation, in the manner now or hereafter prescribed by statute and this Second Amended and Restated Certificate of Incorporation, and all rights conferred upon stockholders herein are granted subject to this reservation.

ELEVENTH. This Article is inserted for the management of the business and for the conduct of the affairs of the Corporation.

1.          Number of Directors. The number of directors of the Corporation shall not be less than three. The exact number of directors within the limitations specified in the preceding sentence shall be fixed from time to time by, or in the manner provided in, the Corporation's By-Laws.

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2.          Classes of Directors. The Board of Directors shall be and is divided into three classes: Class I, Class II and Class III. No one class shall have more than one director more than any other class. If a fraction is contained in the quotient arrived at by dividing the designated number of directors by three, then, if such fraction is one-third, the extra director shall be a member of Class I, and if such fraction is two-thirds, one of the extra directors shall be a member of Class I and one of the extra directors shall be a member of Class II, unless otherwise provided from time to time by resolution adopted by the Board of Directors.

3.          Election of Directors. Elections of directors need not be by written ballot except as and to the extent provided in the By-Laws of the Corporation.

4.          Terms of Office. Each director shall serve for a term ending on the date of the third annual meeting following the annual meeting at which such director was elected; provided, that each initial director in Class I shall serve for a term ending on the date of the annual meeting in 1996; each initial director in Class II shall serve for a term ending on the date of the annual meeting in 1997; and each initial director in Class III shall serve for a term ending on the date of the annual meeting in 1998; and provided further, that the term of each director shall be subject to the election and qualification of his successor and to his earlier death, resignation or removal.

5.          Allocation of Directors Among Classes in the Event of Increases or Decreases in the Number of Directors. In the event of any increase or decrease in the authorized number of directors, (i) each director then serving as such shall nevertheless continue as a director of the class of which he is a member and (ii) the newly created or eliminated directorships resulting from such increase or decrease shall be apportioned by the Board of Directors among the three classes of directors so as to ensure that no one class has more than one director more than any other class. To the extent possible, consistent with the foregoing rule, any newly created directorships shall be added to those classes whose terms of office are to expire at the latest dates following such allocation, and any newly eliminated directorships shall be subtracted from those classes whose terms of offices are to expire at the earliest dates following such allocation, unless otherwise provided from time to time by resolution adopted by the Board of Directors.

6.          Quorum; Action at Meeting. A majority of the directors at any time in office shall constitute a quorum for the transaction of business. In the event one or more of the directors shall be disqualified to vote at any meeting, then the required quorum shall be reduced by one for each director so disqualified, provided that in no case shall less than one-third of the number of directors fixed pursuant to Section 1 above constitute a quorum. If at any meeting of the Board of Directors there shall be less than such a quorum, a majority of those present may adjourn the meeting from time to time. Every act or decision done or made by a majority of the directors present at a meeting duly held at which a quorum is present shall be regarded as the act of the Board of Directors unless a greater number is required by law, by the By-Laws of the Corporation or by this Second Amended and Restated Certificate of Incorporation.

7.          Removal. Directors of the Corporation may be removed only for cause by the affirmative vote of the holders of at least two-thirds of the shares of the capital stock of the Corporation issued and outstanding and entitled to vote.

8.          Vacancies. Any vacancy in the Board of Directors, however occurring, including a vacancy resulting from an enlargement of the board, shall be filled only by a vote of a majority of the directors then in office, although less than a quorum, or by a sole remaining director. A director elected to fill a vacancy shall be elected to hold office until the next election of the class for which such director shall have been chosen, subject to the election and qualification of his successor and to his earlier death, resignation or removal.

9.          Stockholder Nominations and Introduction of Business, Etc. Advance notice of stockholder nominations for election of directors and other business to be brought by stockholders before a meeting of stockholders shall be given in the manner provided by the By-Laws of the Corporation.

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10.           Amendments to Article. Notwithstanding any other provisions of law, this Second Amended and Restated Certificate of Incorporation or the By-Laws of the Corporation, and notwithstanding the fact that a lesser percentage may be specified by law, the affirmative vote of the holders of at least seventy-five percent (75%) of the shares of capital stock of the Corporation issued and outstanding and entitled to vote shall be required to amend or repeal, or to adopt any provision inconsistent with, this Article ELEVENTH.

TWELFTH.         Stockholders of the Corporation may not take any action by written consent in lieu of a meeting. Notwithstanding any other provisions of law, the Second Amended and Restated Certificate of Incorporation or the By-Laws of the Corporation, and notwithstanding the fact that a lesser percentage may be specified by law, the affirmative vote of the holders of at least seventy-five percent (75%) of the shares of capital stock of the Corporation issued and outstanding and entitled to vote shall be required to amend or repeal, or to adopt any provision inconsistent with, this Article TWELFTH.

THIRTEENTH.         Special meetings of stockholders may be called at any time by only the Chief Executive Officer (or, if there is no Chief Executive Officer, the President) or by the Board of Directors. Business transacted at any special meeting of stockholders shall be limited to matters relating to the purpose or purposes stated in the notice of meeting. Notwithstanding any other provision of law, this Second Amended and Restated Certificate of Incorporation or the Corporation's By-Laws, and notwithstanding the fact that a lesser percentage may be specified by law, the affirmative vote of the holders of at least seventy-five percent (75%) of the shares of capital stock of the Corporation issued and outstanding and entitled to vote shall be required to amend or repeal, or to adopt any provision inconsistent with, this Article THIRTEENTH.

IN WITNESS WHEREOF, the Corporation has caused its corporate seal to be affixed hereto and this Second Amended and Restated Certificate of Incorporation to be signed by its President and CEO this 18^th day of June, 2015.

NOVAVAX, INC.
By:	/s/ Stanley C. Erck
	Stanley C. Erck
	President and CEO

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EX-10.1

Exhibit 10.1

EX-10.3

Exhibit 10.3

NOVAVAX, INC.

2015 Stock Incentive Plan

Non-Statutory Stock Option Agreement

1.            Grant of Option. Novavax, Inc., a Delaware corporation (the “Company”), hereby grants to [•] (the “Optionee”), as of [•] (the “Date of Grant”), an option (the “Option”), pursuant to the Company’s 2015 Stock Incentive Plan, as amended from time to time (the “Plan”), to purchase an aggregate of [•]shares of Common Stock (“Shares”) of the Company at a price of $[•] per share, purchasable as set forth in, and subject to the terms and conditions of, this Non-Statutory Stock Option Agreement (this “Agreement”) and the Plan. The Option evidenced by this Agreement is a non-statutory option (that is, an option that does not qualify as an incentive stock option under Section 422 of the Code) and is granted to the Optionee in connection with the Optionee’s Service to the Company or Affiliate.

2.            Meaning of Certain Terms. Except as otherwise defined herein, all capitalized terms used herein have the same meaning as in the Plan. The following terms have the following meanings:

(a)     “Affiliate” means a subsidiary of the Company that would be described in the first sentence of Treas. Regs. § 1.409A-1(b)(5)(iii)(E)(1).

(b)     “Beneficiary” means, in the event of the Optionee’s death, the beneficiary named in the written designation (in form acceptable to the Administrator) most recently filed with the Administrator by the Optionee prior to the Optionee’s death and not subsequently revoked, or, if there is no such designated beneficiary, the executor or administrator of the Optionee’s estate. An effective beneficiary designation will be treated as having been revoked only upon receipt by the Administrator, prior to the Optionee’s death, of an instrument of revocation in form acceptable to the Administrator.

(c)     “Option Holder” means the Optionee or, if as of the relevant time the Option has passed to a Beneficiary, the Beneficiary.

(d)     “Service” means the Optionee’s service relationship with the Company and its Affiliates. Service will be deemed to continue, unless the Administrator expressly provides otherwise, so long as the Optionee is providing services in a capacity described in Section 3(a) of the Plan to, the Company or an Affiliate. If an Optionee’s service relationship is with an Affiliate and that entity ceases to be an Affiliate, the Optionee’s Service will be deemed to have terminated when the entity ceases to be an Affiliate unless the Optionee transfers Service to the Company or its remaining Affiliates.

3.            Option Vesting, Exercise and Expiration.

(a)     Vesting Schedule. As used herein with respect to the Option or any portion thereof, the term “vest” means to become exercisable and the term “vested” as applied to any outstanding portion of the Option means that the Option is then exercisable, subject in each case to the terms of the Plan. Unless earlier terminated, forfeited, relinquished or expired, the Option will vest as to [•].

(b)      Expiration Date. The latest date on which the Option or any portion thereof may be exercised will be the 10^th anniversary of the Date of Grant (the “Expiration Date”). Except as provided in Section 5(e) of the Plan, if the Option is not exercised by the Expiration Date the Option or any remaining portion thereof will thereupon immediately terminate.

(c)      Exercise Procedure. No portion of the Option may be exercised until such portion vests. Each election to exercise any vested portion of the Option will be subject to the terms and conditions of the Plan and this Agreement and shall be in writing (including in electronic form), signed by the Option Holder (or in such other form as is acceptable to the Administrator). Each such written exercise election must be received by the Company at its primary office or by such other party as the Administrator may prescribe and be accompanied by payment in full as provided in the Plan and Section 3(d) hereof. The Option Holder may purchase less than the number of Shares covered hereby, provided that no partial exercise of the Option may be for any fractional Share.

(d)      Payment of Exercise Price. The exercise price may be paid by cash or check made to the order of the Company in an amount equal to the aggregate exercise price of the portion of the Option being exercised or through a broker-assisted exercise program acceptable to the Administrator or, to the extent legally permissible and acceptable to the Administrator, (i) by delivery to the Company of shares of Common Stock already owned by the Optionee having a Fair Market Value equal in amount to the aggregate exercise price of the portion of the Option being exercised, (ii) through the withholding of shares of Common Stock otherwise to be delivered upon exercise of the Option having a Fair Market Value equal to the aggregate exercise price of the portion of the Option being exercised, or (iii) by any other means approved by the Administrator. Fractional shares of Common Stock of the Company will not be accepted in payment of the purchase price of Shares acquired upon exercise of the Option. In the event that the Option is exercised by a person other than the Optionee, the Company will be under no obligation to deliver Shares hereunder unless and until it is satisfied as to the authority of the Option Holder to exercise the Option and compliance with applicable securities laws.

(e)      Treatment of the Option upon Cessation of Service.

(i)       If the Optionee’s Service ceases, the Option, to the extent not already vested or vesting in accordance with Section 3(a)(ii) or 3(a)(iv) above, will be immediately forfeited and, subject to clause (ii) below and Section 4 of this Agreement, any vested portion of the Option that is then outstanding will remain exercisable until the earlier of (A) the date that is the three-year anniversary of the date of such cessation of Service, or (B) the Expiration Date, and except to the extent previously exercised as permitted by this Section 3(e)(i) will thereupon immediately terminate.

(ii)     If the Optionee’s Service is terminated in connection with an act or failure to act constituting Cause (as the Administrator, in its sole discretion, may determine), the Option (whether or not vested) will immediately terminate and be forfeited upon such termination.

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4.           Forfeiture; Recovery of Compensation.

(a)      The Administrator may cancel, rescind, withhold or otherwise limit or restrict the Option at any time if the Optionee is not in compliance with all applicable provisions of this Agreement and the Plan.

(b)      By accepting the Option, the Optionee expressly acknowledges and agrees that his or her rights, and those of any permitted transferee of the Option, under the Option, including to any Common Stock acquired under the Option or proceeds from the disposition thereof, are subject to Section 8(e) of the Plan (including any successor provision). Nothing in the preceding sentence shall be construed as limiting the general application of Section 9 of this Agreement.

5.           Transfer of Option. The Option may not be transferred except as expressly permitted under Section 8(b) of the Plan.

6.           Withholding. The Option Holder shall be responsible for satisfying and paying all taxes arising from or due in connection with the Option, its exercise or a disposition of Shares acquired upon exercise of the Option. The Company shall have no liability or obligation related to the foregoing.

7.           Effect on Service. Neither the grant of the Option, nor the issuance of Shares upon exercise of the Option, will give the Optionee any right to be retained in the service of the Company or any of its Affiliates, affect the right of the Company or any of its Affiliates to discharge or discipline such Optionee at any time, or affect any right of such Optionee to terminate his or her Service at any time.

8.            Rights as a Stockholder. The Option Holder shall have no rights as a stockholder with respect to any Shares that may be purchased by exercise of the Option (including, without limitation, any rights to receive dividends or non-cash distributions with respect to such Shares) except as to shares of Common Stock actually issued under the Plan. No adjustment shall be made for dividends or other rights for which the record date is prior to the date such shares of Common Stock are issued.

9.            Provisions of the Plan. This Agreement is subject in its entirety to the provisions of the Plan, which are incorporated herein by reference. A copy of the Plan as in effect on the Date of Grant has been furnished to the Optionee. By exercising all or any part of the Option, the Option Holder agrees to be bound by the terms of the Plan and this Agreement. In the event of any conflict between the terms of this Agreement and the Plan, the terms of the Plan shall control.

10.          Acknowledgements. The Optionee acknowledges and agrees that (i) this Agreement may be executed in two or more counterparts, each of which shall be an original and all of which together shall constitute one and the same instrument and (ii) this agreement may be executed and exchanged using facsimile, portable document format (PDF) or electronic signature, which, in each case, shall constitute an original signature for all purposes hereunder.

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Date of Grant: [•]	NOVAVAX, INC.
	By:
		Barclay A. Phillips
		SVP, Chief Financial Officer

OPTIONEE’S ACCEPTANCE

The undersigned hereby accepts the Option and agrees to the terms and conditions of this Agreement and the Plan. The undersigned hereby acknowledges receipt of a copy of the Plan.

OPTIONEE

PRINT NAME

SIGN NAME

PRINT ADDRESS

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EX-10.4

Exhibit 10.4

 

NOVAVAX, INC.

2015 Stock Incentive Plan

Incentive Stock Option Agreement

1.           Grant of Option. Novavax, Inc., a Delaware corporation (the “Company”), hereby grants to [•] (the “Optionee”), as of [•] (the “Date of Grant”), an option (the “Option”), pursuant to the Company’s 2015 Stock Incentive Plan, as amended from time to time (the “Plan”), to purchase an aggregate of [•] shares of Common Stock (“Shares”) of the Company at a price of $[•] per share, purchasable as set forth in, and subject to the terms and conditions of, this Incentive Stock Option Agreement (this “Agreement”) and the Plan. The Option evidenced by this Agreement is intended to be an incentive stock option under Section 422 of the Code and is granted to the Optionee in connection with the Optionee’s Service to the Company or Affiliate.

2.           Meaning of Certain Terms. Except as otherwise defined herein, all capitalized terms used herein have the same meaning as in the Plan. The following terms have the following meanings:

(a)          “Affiliate” means a subsidiary of the Company that would be described in the first sentence of Treas. Regs. § 1.409A-1(b)(5)(iii)(E)(1).

(b)          “Beneficiary” means, in the event of the Optionee’s death, the beneficiary named in the written designation (in form acceptable to the Administrator) most recently filed with the Administrator by the Optionee prior to the Optionee’s death and not subsequently revoked, or, if there is no such designated beneficiary, the executor or administrator of the Optionee’s estate. An effective beneficiary designation will be treated as having been revoked only upon receipt by the Administrator, prior to the Optionee’s death, of an instrument of revocation in form acceptable to the Administrator.

(c)          “Option Holder” means the Optionee or, if as of the relevant time the Option has passed to a Beneficiary, the Beneficiary.

(d)          “Service” means the Optionee’s employment or other service relationship with the Company and its Affiliates. Service will be deemed to continue, unless the Administrator expressly provides otherwise, so long as the Optionee is employed by, or otherwise providing services in a capacity described in Section 3(a) of the Plan to, the Company or an Affiliate. If an Optionee’s employment or other service relationship is with an Affiliate and that entity ceases to be an Affiliate, the Optionee’s Service will be deemed to have terminated when the entity ceases to be an Affiliate unless the Optionee transfers Service to the Company or its remaining Affiliates.

3.           Option Vesting, Exercise and Expiration.

(a)          Vesting Schedule. As used herein with respect to the Option or any portion thereof, the term “vest” means to become exercisable and the term “vested” as applied to any outstanding portion of the Option means that the Option is then exercisable, subject in each case to the terms of the Plan. Unless earlier terminated, forfeited, relinquished or expired, the Option will vest as to the percentage of the Shares set forth in the table below on the respective vesting date set forth in the table below (with the number of Shares that vest on any such date being rounded down to the nearest whole Share and the Option becoming vested as to 100% of the Shares on the last vesting date), subject to the Optionee’s continuous Service through each such vesting date.

Vesting Date	Percentage of Shares as to which Option is Vested
[•]	[•]

(b)          Expiration Date. The latest date on which the Option or any portion thereof may be exercised will be the 10^th anniversary of the Date of Grant (the “Expiration Date”). Except as provided in Section 5(e) of the Plan, if the Option is not exercised by the Expiration Date the Option or any remaining portion thereof will thereupon immediately terminate.

(c)          Exercise Procedure. No portion of the Option may be exercised until such portion vests. Each election to exercise any vested portion of the Option will be subject to the terms and conditions of the Plan and this Agreement and shall be in writing (including in electronic form), signed by the Option Holder (or in such other form as is acceptable to the Administrator). Each such written exercise election must be received by the Company at its primary office or by such other party as the Administrator may prescribe and be accompanied by payment in full as provided in the Plan and Section 3(d) hereof. The Option Holder may purchase less than the number of Shares covered hereby, provided that no partial exercise of the Option may be for any fractional Share.

(d)          Payment of Exercise Price. The exercise price may be paid by cash or check made to the order of the Company in an amount equal to the aggregate exercise price of the portion of the Option being exercised or through a broker-assisted exercise program acceptable to the Administrator or, to the extent legally permissible and acceptable to the Administrator, (i) by delivery to the Company of shares of Common Stock already owned by the Optionee having a Fair Market Value equal in amount to the aggregate exercise price of the portion of the Option being exercised, (ii) through the withholding of shares of Common Stock otherwise to be delivered upon exercise of the Option having a Fair Market Value equal to the aggregate exercise price of the portion of the Option being exercised, or (iii) by any other means approved by the Administrator. Fractional shares of Common Stock of the Company will not be accepted in payment of the purchase price of Shares acquired upon exercise of the Option. In the event that the Option is exercised by a person other than the Optionee, the Company will be under no obligation to deliver Shares hereunder unless and until it is satisfied as to the authority of the Option Holder to exercise the Option and compliance with applicable securities laws.

(e)          Treatment of the Option upon Cessation of Service. If the Optionee’s Service ceases, the Option, to the extent not already vested, will be immediately forfeited, and any vested portion of the Option that is then outstanding will be treated as follows:

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(i)          Subject to clauses (ii) and (iii) below and Section 4 of this Agreement, the Option, to the extent vested immediately prior to the cessation of the Optionee’s Service, will remain exercisable until the earlier of (A) the date that is three months following the date of such cessation of Service, or (B) the Expiration Date, and except to the extent previously exercised as permitted by this Section 3(e)(i) will thereupon immediately terminate.

(ii)         Subject to clause (iii) below and Section 4 of this Agreement, the Option, to the extent vested immediately prior to (A) the cessation of the Optionee’s Service due to death or disability (within the meaning of Section 22(e)(3) of the Code or any successor provision thereto), or (B) the Optionee’s death within three months following the Optionee’s termination of Service, will remain exercisable until the earlier of (x) the first anniversary of the date of the Optionee’s death or of the date of the termination of the Optionee’s Service due to disability, as applicable, or (y) the Expiration Date, and except to the extent previously exercised as permitted by this Section 3(e)(ii) will thereupon immediately terminate.

(iii)        If the Optionee’s Service is terminated by the Company and its subsidiaries in connection with an act or failure to act constituting Cause (as the Administrator, in its sole discretion, may determine), the Option (whether or not vested) will immediately terminate and be forfeited upon such termination.

Upon a cessation of the Optionee’s employment with the Company and its subsidiaries that is not a cessation of Service, the Option will cease to be an incentive stock option and will become a Non-Statutory Option if the Option, to the extent exercisable, is not exercised within the periods set forth in the Treasury Regulations applicable to incentive stock options.

4.           Forfeiture; Recovery of Compensation.

(a)          The Administrator may cancel, rescind, withhold or otherwise limit or restrict the Option at any time if the Optionee is not in compliance with all applicable provisions of this Agreement and the Plan.

(b)          By accepting the Option, the Optionee expressly acknowledges and agrees that his or her rights, and those of any permitted transferee of the Option, under the Option, including to any Common Stock acquired under the Option or proceeds from the disposition thereof, are subject to Section 8(e) of the Plan (including any successor provision). Nothing in the preceding sentence shall be construed as limiting the general application of Section 9 of this Agreement.

5.           Transfer of Option. The Option may not be transferred except as expressly permitted under Section 8(b) of the Plan.

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6.           Taxes.

(a)          Withholding. If at the time the Option is exercised the Company determines that under applicable law and regulations it could be liable for the withholding of any federal, state or local tax upon such exercise or with respect to a disposition of any Common Stock acquired upon such exercise, the Optionee by signing this Agreement (and any other Option Holder by exercising all or any part of the Option) expressly acknowledges and agrees that the Option Holder’s rights hereunder, including the right to be issued Shares upon exercise, are subject to the Option Holder promptly paying to the Company in cash (or by such other means as may be acceptable to the Administrator in its discretion) all taxes required to be withheld. No Shares will be transferred pursuant to the exercise of the Option unless and until the person exercising the Option has remitted to the Company an amount in cash sufficient to satisfy any federal, state, or local withholding tax requirements, or has made other arrangements satisfactory to the Company with respect to such taxes. The Optionee by signing this Agreement (and any other Option Holder by exercising all or any part of the Option) authorizes the Company and its subsidiaries to withhold such amount from any amounts otherwise owed to the Option Holder, but nothing in this sentence shall be construed as relieving the Option Holder of any liability for satisfying his or her obligation under the preceding provisions of this Section.

(b)          Disqualifying Disposition. If the Optionee disposes of the Shares acquired upon exercise of the Option within two years from the Date of Grant or one year after such Shares were acquired pursuant to the exercise of the Option, the Optionee shall notify the Company in writing of such disposition within 15 days of such disposition.

(c)          Annual Limit for Incentive Stock Options. To the extent that the aggregate fair market value (determined at the time of grant) of the shares of Stock subject to the Option and all other incentive stock options the Optionee holds that are exercisable for the first time during any calendar year (under all plans of the Company and its related corporations) exceeds $100,000, the options held by the Optionee or portions thereof that exceed such limit (according to the order in which they were granted in accordance with the regulations under Section 422 of the Code) shall be treated as Non-Statutory Options.

(d)          Limitation on Liability. The Optionee acknowledges and agrees that the Company or the Administrator may take any action permitted under the Plan without regard to the effect such action may have on the status of the Option as an incentive stock option under Section 422 of the Code and that such actions may cause the Option to fail to be treated as an incentive stock option under Section 422 of the Code. The Optionee further acknowledges and agrees that neither the Company, nor any of its affiliates, nor the Administrator, nor any person acting on behalf of the Company, any of its affiliates, or the Administrator, will be liable to the Optionee or to the estate or beneficiary of the Optionee or to any other person by reason of the failure of the Option to satisfy the requirements of Section 422 of the Code.

7.           Effect on Service. Neither the grant of the Option, nor the issuance of Shares upon exercise of the Option, will give the Optionee any right to be retained in the employ or service of the Company or any of its affiliates, affect the right of the Company or any of its affiliates to discharge or discipline such Optionee at any time, or affect any right of such Optionee to terminate his or her employment or service at any time.

8.           Rights as a Stockholder. The Option Holder shall have no rights as a stockholder with respect to any Shares that may be purchased by exercise of the Option (including, without limitation, any rights to receive dividends or non-cash distributions with respect to such Shares) except as to shares of Common Stock actually issued under the Plan. No adjustment shall be made for dividends or other rights for which the record date is prior to the date such shares of Common Stock are issued.

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9.           Provisions of the Plan. This Agreement is subject in its entirety to the provisions of the Plan, which are incorporated herein by reference. A copy of the Plan as in effect on the Date of Grant has been furnished to the Optionee. By exercising all or any part of the Option, the Option Holder agrees to be bound by the terms of the Plan and this Agreement. In the event of any conflict between the terms of this Agreement and the Plan, the terms of the Plan shall control.

10.           Acknowledgements. The Optionee acknowledges and agrees that (i) this Agreement may be executed in two or more counterparts, each of which shall be an original and all of which together shall constitute one and the same instrument and (ii) this agreement may be executed and exchanged using facsimile, portable document format (PDF) or electronic signature, which, in each case, shall constitute an original signature for all purposes hereunder.

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Date of Grant: [•]	NOVAVAX, INC.
	By:
		Barclay A. Phillips
		SVP, Chief Financial Officer

OPTIONEE’S ACCEPTANCE

The undersigned hereby accepts the Option and agrees to the terms and conditions of this Agreement and the Plan. The undersigned hereby acknowledges receipt of a copy of the Plan.

OPTIONEE

PRINT NAME

SIGN NAME

PRINT ADDRESS

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EX-10.5

 

Exhibit 10.5

NOVAVAX, INC.

2015 Stock Incentive Plan

Restricted Stock Agreement

This Restricted Stock Agreement (“Agreement”) is made as of [•] by and between Novavax, Inc., a Delaware corporation (“Company”), and [•] (“Stockholder”).

Whereas, the Company desires to issue, and Stockholder desires to acquire, stock of the Company as herein described, on the terms and conditions hereinafter set forth;

Whereas, the issuance of common stock hereby is pursuant to Section 7(a) of the Company’s 2015 Stock Incentive Plan (“Plan”), which is a compensatory benefit arrangement for the employees, officers, directors, consultants and advisors of the Company.

Now, Therefore, It Is Agreed between the parties as follows:

1.          Issuance of Stock. The Company hereby agrees to issue to Stockholder, and Stockholder agrees to accept, an aggregate of [•] shares of the Common Stock of the Company (the “Stock”), having a value as determined by the Board of Directors of the Company of $[•] per share (for an aggregate value of $[•]), in exchange for Stockholder’s past services and/or expected provision of future services on behalf of the Company or its affiliated entities.

2.          Risk of Forfeiture

(a)          Subject to Section 2(c), and with respect to Stock that has vested pursuant to Section 2(b), if Stockholder ceases to be an employee, director or consultant of the Company or its subsidiaries for any reason, including but not limited to death or disability, all then-outstanding and unvested Stock acquired by Stockholder hereunder shall be automatically and immediately forfeited. Stockholder, or Stockholder’s personal representative as the case may be, hereby (i) appoints the Company as the attorney-in-fact of the undersigned to take such actions as may be necessary or appropriate to effectuate a transfer of the record ownership, at no cost to the Company, of any such shares that are unvested and forfeited hereunder, (ii) agrees to deliver to the Company, as a precondition to the issuance of any certificate(s) of Stock, one or more stock powers, endorsed in blank, with respect to such Stock, and (iii) agrees to take such other actions as the Company may reasonably request to accomplish the transfer or forfeiture of any such Stock hereunder.

(b)          On the date that is [•] after the “Vesting Commencement Date” (as set forth on the signature page to this Agreement), [•]. In order for the Stock to vest on a particular vesting installment date, the Stockholder must have been and must be an employee, director or consultant of the Company or a parent or subsidiary of the Company continuously until such vesting installment date. By way of example, if an employee terminates and immediately thereafter becomes a consultant of the company, such individual will be deemed to have a continuous qualifying role with the Company. Accordingly, all of the Stock shall vest as of the [•] anniversary of the Vesting Commencement Date. The final vesting installment may cover additional shares to take into account any fractional shares.

3.          Adjustments to Stock.If, from time to time, prior to full vesting, there is any change affecting the Company’s outstanding Common Stock as a class that is effected without the receipt of consideration by the Company (through merger, consolidation, reorganization, reincorporation, stock dividend, dividend in property other than cash, stock split, liquidating dividend, combination of shares, change in corporation structure or other transaction not involving the receipt of consideration by the Company), then any and all new, substituted or additional securities or other property to which Stockholder is entitled by reason of Stockholder’s ownership of Stock shall be immediately subject to vesting hereunder and be included in the word “Stock” for all purposes of this Agreement with the same force and effect as the shares of the Stock presently subject to vesting.

4.          Escrow of Unvested Stock. As security for Stockholder’s faithful performance of the terms of this Agreement and to insure the availability for delivery of Stockholder’s Stock, Stockholder agrees, at the closing hereunder, to deliver to and deposit with the Secretary of the Company or the Secretary’s designee (“Escrow Agent”), as Escrow Agent in this transaction, three (3) stock assignments duly endorsed (with date and number of shares blank) in a form attached hereto as Exhibit A, together with a certificate or certificates evidencing all of the Stock subject to vesting; said documents are to be held by the Escrow Agent and delivered by said Escrow Agent pursuant to the Joint Escrow Instructions of the Company and Stockholder set forth in Exhibit B attached hereto and incorporated by this reference, which instructions shall also be delivered to the Escrow Agent at the closing hereunder. Stockholder hereby acknowledges that the Secretary of the Company, or the Secretary’s designee, is so appointed as the Escrow Agent. Stockholder agrees that the Escrow Agent shall not be liable to any party hereof (or to any other party), and may rely upon any letter, notice or other document executed by any signature purported to be genuine and may resign at any time. Stockholder agrees that if the Secretary of the Company, or the Secretary’s designee, resigns as Escrow Agent for any or no reason, the Board of Directors of the Company shall have the power to appoint a successor to serve as Escrow Agent pursuant to the terms of this Agreement. Stockholder agrees that if the Secretary of the Company resigns as Secretary, the successor Secretary shall serve as Escrow Agent pursuant to the terms of this Agreement.

5.          Rights of Stockholder. Subject to the provisions of Sections 6, 8, 12 and 13 herein, Stockholder shall exercise all rights and privileges of a shareholder of the Company with respect to the Stock deposited in escrow. Stockholder shall be deemed to be the holder for purposes of receiving any dividends that may be paid with respect to such shares of Stock and for the purpose of exercising any voting rights relating to such shares of Stock, even if some or all of such shares of Stock have not yet vested.

6.          Limitations on Transfer. In addition to any other limitation on transfer created by applicable securities laws, Stockholder shall not assign, hypothecate, donate, encumber or otherwise dispose of any interest in the Stock while the Stock is not fully vested. After any Stock has been fully vested, Stockholder shall not assign, hypothecate, donate, encumber or otherwise dispose of any interest in the Stock except in compliance with the provisions herein and applicable securities laws. During the period of time during which the Stockholder holds the Common Stock, the value of the Common Stock may increase or decrease, and any risk associated with such Common Stock and such fluctuation in value shall be borne by the Stockholder.

2.

7.          Restrictive Legends. All certificates representing the Stock shall have endorsed thereon legends in substantially the following forms (in addition to any other legend which may be required by other agreements between the parties hereto):

(a)          “THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO AN OPTION SET FORTH IN AN AGREEMENT BETWEEN THE COMPANY AND THE REGISTERED HOLDER, OR SUCH HOLDER’S PREDECESSOR IN INTEREST, A COPY OF WHICH IS ON FILE AT THE PRINCIPAL OFFICE OF THE COMPANY. ANY TRANSFER OR ATTEMPTED TRANSFER OF ANY SHARES SUBJECT TO SUCH OPTION IS VOID WITHOUT THE PRIOR EXPRESS WRITTEN CONSENT OF THE COMPANY.”

(b)          Any legend required by Company officials.

8.          Investment Representations. In connection with the issuance of the Stock, Stockholder represents to the Company the following:

(a)          Stockholder is aware of the Company’s business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision to acquire the Stock. Stockholder is acquiring the Stock for investment for Stockholder’s own account only and not with a view to, or for resale in connection with, any “distribution” thereof within the meaning of the Act.

Stockholder is familiar with the provisions of Rule 144, under the Securities Act of 1933, as in effect from time to time, which, in substance, permit limited public resale of “restricted securities” acquired, directly or indirectly, from the issuer thereof (or from an affiliate of such issuer), in a non-public offering subject to the satisfaction of certain conditions. The Stock may be resold by Stockholder in certain limited circumstances subject to the provisions of Rule 144, which requires, among other things: (i) the availability of certain public information about the Company and (ii) the resale occurring following the required holding period under Rule 144 after the Stockholder has acquired, and made full payment of (within the meaning of Rule 144), the securities to be sold.

(b)          Stockholder further understands that at the time Stockholder wishes to sell the Stock there may be no public market upon which to make such a sale, and that, even if such a public market then exists, the Company may not be satisfying the current public information requirements of Rule 144, and that, in such event, Stockholder would be precluded from selling the Stock under Rule 144 even if the minimum holding period requirement had been satisfied.

3.

9.          Section 83(b) Election. Stockholder understands that Section 83(a) of the Code, taxes as ordinary income the difference between the amount paid for the Stock and the fair market value of the Stock as of the date any restrictions on the Stock lapse. In this context, “restriction” includes the right of the Company to receive transfer of the Stock as set forth in Section 2 above. Stockholder understands that Stockholder may elect to be taxed at the time the Stock is acquired, rather than when and as vesting occurs, by filing an election under Section 83(b) (an “83(b) Election”) of the Code with the Internal Revenue Service within thirty (30) days from the date of transfer. Even if the fair market value of the Stock at the time of the execution of this Agreement equals the amount paid for the Stock, the 83(b) Election must be made to avoid income under Section 83(a) in the future. Stockholder understands that failure to file such an 83(b) Election in a timely manner may result in adverse tax consequences for Stockholder. Stockholder further understands that an additional copy of such 83(b) Election is required to be filed with his or her federal income tax return for the calendar year in which the date of this Agreement falls. Stockholder further acknowledges and understands that it is Stockholder’s sole obligation and responsibility to timely file such 83(b) Election, and neither the Company nor the Company’s legal or financial advisors shall have any obligation or responsibility with respect to such filing. Stockholder acknowledges that the foregoing is only a summary of the effect of United States federal income taxation with respect to acquisition of the Stock hereunder, and does not purport to be complete. Stockholder further acknowledges that the Company has directed Stockholder to seek independent advice regarding the applicable provisions of the Code, the income tax laws of any municipality, state or foreign country in which Stockholder may reside, and the tax consequences of Stockholder’s death. Stockholder assumes all responsibility for filing an 83(b) Election and paying all taxes resulting from such election or the lapse of the restrictions on the Stock.

10.         Refusal to Transfer. The Company shall not be required (a) to transfer on its books any shares of Stock of the Company which shall have been transferred in violation of any of the provisions set forth in this Agreement, or (b) to treat as owner of such shares or to accord the right to vote as such owner or to pay dividends to any transferee to whom such shares shall have been so transferred.

11.         No Service Rights. This Agreement is not an employment or service contract and nothing in this Agreement shall affect in any manner whatsoever the right or power of the Company (or a parent or subsidiary of the Company) to terminate Stockholder’s employment or service for any reason at any time, with or without cause and with or without notice.

12.         Miscellaneous.

(a)          Notices. All notices required or permitted hereunder shall be in writing and shall be deemed effectively given: (i) upon personal delivery to the party to be notified, (ii) when sent by confirmed telex or facsimile if sent during normal business hours of the recipient, and if not during normal business hours of the recipient, then on the next business day, (iii) five (5) calendar days after having been sent by registered or certified mail, return receipt requested, postage prepaid, or (iv) one (1) business day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt. All communications shall be sent to the other party hereto at such party’s address hereinafter set forth on the signature page hereof, or at such other address as such party may designate by ten (10) days advance written notice to the other party hereto.

(b)          Successors and Assigns. This Agreement shall inure to the benefit of the successors and assigns of the Company and, subject to the restrictions on transfer herein set forth, be binding upon Stockholder, Stockholder’s successors, and assigns. Company’s rights hereunder shall be assignable by the Company at any time or from time to time, in whole or in part.

4.

(c)          Attorneys’ Fees; Specific Performance. Stockholder shall reimburse the Company for all costs incurred by the Company in enforcing the performance of, or protecting its rights under, any part of this Agreement, including reasonable costs of investigation and attorneys’ fees. It is the intention of the parties that, upon a forfeiture pursuant to the terms of this Agreement, the Company shall be entitled to receive the Stock, in specie, in order to have such Stock available for future issuance without dilution of the holdings of other shareholders. Furthermore, it is expressly agreed between the parties that money damages are inadequate to compensate the Company for the Stock and that the Company shall be entitled to specific enforcement of its rights to purchase and receive said Stock.

(d)          Governing Law; Venue. This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware. The parties agree that any action brought by either party to interpret or enforce any provision of this Agreement shall be brought in, and each party agrees to, and does hereby, submit to the jurisdiction and venue of, the appropriate state or federal court for the district encompassing the Company’s principal place of business.

(e)          Further Execution. The parties agree to take all such further action(s) as may reasonably be necessary to carry out and consummate this Agreement as soon as practicable, and to take whatever steps may be necessary to obtain any governmental approval in connection with or otherwise qualify the issuance of the securities that are the subject of this Agreement.

(f)          Independent Counsel. Stockholder acknowledges that Stockholder has been provided with an opportunity to consult with their own legal counsel and tax or other advisors with respect to this Agreement.

(g)          Entire Agreement; Amendment. This Agreement and the Plan constitute the entire agreement between the parties with respect to the subject matter hereof and supersede and merge all prior agreements or understandings, whether written or oral. This Agreement may not be amended, modified or revoked, in whole or in part, except by an agreement in writing signed by each of the parties hereto. The provisions of the Plan apply to the Stock awarded under this Agreement, and any word or term that is capitalized, but not otherwise defined in this Agreement, shall have the meaning set forth in the Plan.

(h)          Severability. If one or more provisions of this Agreement are held to be unenforceable under applicable law, the parties agree to renegotiate such provision in good faith. In the event that the parties cannot reach a mutually agreeable and enforceable replacement for such provision, then (i) such provision shall be excluded from this Agreement, (ii) the balance of the Agreement shall be interpreted as if such provision were so excluded and (iii) the balance of the Agreement shall be enforceable in accordance with its terms.

(i)          Counterparts. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original and all of which together shall constitute one instrument.

5.

In Witness Whereof, the parties hereto have executed this Agreement as of the day and year first above written.

Novavax, Inc.
By:
	Barclay A. Phillips
	SVP, Chief Financial Officer and Treasurer

Stockholder acknowledges and agrees that the vesting of shares pursuant to Section 2 hereof is earned only by continuing service as an employee, consultant or director at the will of the company. Stockholder further acknowledges and agrees that nothing in this agreement shall confer upon Stockholder any right with respect to continuation of such employment or service relationship with the company, nor shall it interfere in any way with Stockholder’s right or the company’s right to terminate Stockholder’s employment or consulting relationship at any time, with or without cause.

Stockholder further acknowledges that any risk related to the fluctuation in the value of the stock from and after the date hereof, including any losses to Stockholder as a result of forfeiture pursuant to Section 2, shall be borne by Stockholder.

Stockholder acknowledges that Stockholder has read all tax related sections and further acknowledges Stockholder has had an opportunity to consult Stockholder’s own Tax, Legal and Financial Advisors regarding the purchase of common stock under this Agreement.

Stockholder acknowledges and agrees that in making the decision to acquire the common stock hereunder Stockholder has not relied on any statement, whether written or oral, regarding the subject matter hereof, except as expressly provided herein and in the attachments and exhibits hereto.

Stockholder:

NAME

Address:

Vesting Commencement Date: [•]

6.

Attachments:

Exhibit A – Stock Assignment

Exhibit B – Joint Escrow Instructions

7.

Exhibit A

STOCK ASSIGNMENT SEPARATE FROM CERTIFICATE

For Value Received, [•] hereby sells, assigns and transfers unto Novavax, Inc., a Delaware corporation (the “Company”), pursuant to the Restricted Stock Agreement, dated [•], by and between the undersigned and the Company (the “Agreement”) [•] shares of Common Stock of the Company standing in the undersigned’s name on the books of the Company and does hereby irrevocably constitute and appoint both the Company’s Secretary and the Company’s attorney, or either of them, to transfer said stock on the books of the Company with full power of substitution in the premises. This Assignment may be used only in accordance with and subject to the terms and conditions of the Agreement, in connection with the redemption of shares of Common Stock issued to the undersigned pursuant to the Agreement, and only to the extent that such shares remain unvested under the Agreement.

Dated:
	(Signature)
	(Print Name)

[Instruction: Please do not fill in any blanks other than the signature line. The purpose of this Assignment is to enable the Company to exercise its redemption rights set forth in the Agreement without requiring additional signatures on the part of Stockholder.]

8.

Exhibit B

JOINT ESCROW INSTRUCTIONS

John A. Herrmann III, Corporate Secretary

Novavax, Inc.

20 Firstfield Road

Gaithersburg, MD 20878

Sir:

As Escrow Agent for both Novavax, Inc., a Delaware Company (“Company”) and [•] (“Stockholder”), you are hereby authorized and directed to hold the documents delivered to you pursuant to the terms of that certain Restricted Stock Agreement dated as of [•] (“Agreement”), to which a copy of these Joint Escrow Instructions is attached as Exhibit B, in accordance with the following instructions:

1.          In the event Company or an assignee shall elect to exercise any redemption rights set forth in the Agreement, the Company or its assignee will give to Stockholder and you a written notice specifying the number of shares of stock to be redeemed, the redemption price, if any, and the time for a closing thereunder at the principal office of the Company. Stockholder and the Company hereby irrevocably authorize and direct you to close the transaction contemplated by such notice in accordance with the terms of said notice.

2.          At the closing, you are directed (a) to date the stock assignments necessary for the transfer in question, (b) to fill in the number of shares being transferred, and (c) to deliver the same, together with the certificate evidencing the shares of stock to be transferred, to the Company against the simultaneous delivery to you of the redemption price, if any (which may include suitable acknowledgment of cancellation of indebtedness) for the number of shares of stock being redeemed pursuant to the exercise of the its redemption rights.

3.          Stockholder irrevocably authorizes the Company to deposit with you any certificates evidencing shares of stock to be held by you hereunder and any additions and substitutions to said shares as specified in the Agreement. Stockholder does hereby irrevocably constitute and appoint you as his attorney-in-fact and agent for the term of this escrow to execute with respect to such securities all documents necessary or appropriate to make such securities negotiable and complete any transaction herein contemplated, including but not limited to any appropriate filing with state or government officials or bank officials. Subject to the provisions of this paragraph 3, Stockholder shall exercise all rights and privileges of a shareholder of the Company while the stock is held by you.

4.          This escrow shall terminate upon the exercise in full or expiration of such redemption rights, whichever occurs first.

9.

5.          If at the time of termination of this escrow under Section 4 herein you should have in your possession any documents, securities, or other property belonging to Stockholder, you shall deliver all of the same to Stockholder and shall be discharged of all further obligations hereunder; provided, however, that if at the time of termination of this escrow you are advised by the Company that any property subject to this escrow is the subject of a pledge or other security agreement, you shall deliver all such property to the pledgeholder or other person designated by the Company.

6.          Except as otherwise provided in these Joint Escrow Instructions, your duties hereunder may be altered, amended, modified or revoked only by a writing signed by all of the parties hereto.

7.          You shall be obligated only for the performance of such duties as are specifically set forth herein and may rely and shall be protected in relying or refraining from acting on any instrument reasonably believed by you to be genuine and to have been signed or presented by the proper party or parties. You shall not be personally liable for any act you may do or omit to do hereunder as Escrow Agent or as attorney-in-fact for Stockholder while acting in good faith and in the exercise of your own good judgment, and any act done or omitted by you pursuant to the advice of your own attorneys shall be conclusive evidence of such good faith.

8.          You are hereby expressly authorized to disregard any and all warnings given by any of the parties hereto or by any other person or Company, excepting only orders or process of courts of law, and are hereby expressly authorized to comply with and obey orders, judgments or decrees of any court. In case you obey or comply with any such order, judgment or decree of any court, you shall not be liable to any of the parties hereto or to any other person, firm or Company by reason of such compliance, notwithstanding any such order, judgment or decree being subsequently reversed, modified, annulled, set aside, vacated or found to have been entered without jurisdiction.

9.          You shall not be liable in any respect on account of the identity, authorities or rights of the parties executing or delivering or purporting to execute or deliver these Joint Escrow Instructions documents or papers deposited or called for hereunder.

10.         You shall not be liable for the outlawing of any rights under any statute of limitations with respect to these Joint Escrow Instructions or any documents deposited with you.

11.         Your responsibilities as Escrow Agent hereunder shall terminate if you shall cease to be Secretary of the Company or if you shall resign by written notice to the Company. In the event of any such termination, the Secretary of the Company shall automatically become the successor Escrow Agent unless the Company shall appoint another successor Escrow Agent, and Stockholder hereby confirms the appointment of such successor as Stockholder’s attorney-in-fact and agent to the full extent of your appointment.

12.         If you reasonably require other or further instruments in connection with these Joint Escrow Instructions or obligations in respect hereto, the necessary parties hereto shall join in furnishing such instruments.

10.

13.         It is understood and agreed that should any dispute arise with respect to the delivery and/or ownership or right of possession of the securities held by you hereunder, you are authorized and directed to retain in your possession without liability to anyone all or any part of said securities until such dispute shall have been settled either by mutual written agreement of the parties concerned or by a final order, decree or judgment of a court of competent jurisdiction after the time for appeal has expired and no appeal has been perfected, but you shall be under no duty whatsoever to institute or defend any such proceedings.

14.         All notices required or permitted hereunder shall be in writing and shall be deemed effectively given: (a) upon personal delivery to the party to be notified, (b) when sent by confirmed telex or facsimile if sent during normal business hours of the recipient, and if not during normal business hours of the recipient, then on the next business day, (c) five (5) calendar days after having been sent by registered or certified mail, return receipt requested, postage prepaid, or (d) one (1) business day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt. All communications shall be sent to the other party hereto at such party’s address set forth below, or at such other address as such party may designate by ten (10) days advance written notice to the other party hereto.

Company:	novavax, inc. 20 Firstfield Road Gaithersburg, MD 20878
Stockholder:	[•]
Escrow Agent:	Corporate Secretary novavax, inc. 20 Firstfield Road Gaithersburg, MD 20878

15.         By signing these Joint Escrow Instructions, you become a party hereto only for the purpose of said Joint Escrow Instructions; you do not become a party to the Agreement.

16.         You shall be entitled to employ such legal counsel and other experts as you may deem necessary properly to advise you in connection with your obligations hereunder. You may rely upon the advice of such counsel, and you may pay such counsel reasonable compensation therefor. The Company shall be responsible for all fees generated by such legal counsel in connection with your obligations hereunder.

17.         This instrument shall be binding upon and inure to the benefit of the parties hereto and their respective successors and permitted assigns. It is understood and agreed that references to “you” and “your” herein refer to the original Escrow Agents. It is understood and agreed that the Company may at any time or from time to time assign its rights under the Agreement and these Joint Escrow Instructions.

11.

18.         These Joint Escrow Instructions shall be governed by and interpreted and determined in accordance with the laws of the State of Delaware, as such laws are applied by Delaware courts to contracts made and to be performed entirely in Delaware by residents of that state.

Very truly yours,
novavax, inc.:
By
	Barclay A. Phillips
	SVP, Chief Financial Officer and Treasurer
Stockholder:

Acknowledged

Escrow Agent:

John A. Herrmann III

SVP, General Counsel & Corporate Secretary

12.

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Stanley C. Erck, certify that:

1.          I have reviewed this Quarterly Report on Form 10-Q of Novavax, Inc.;

2.          Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.          Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.          The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and we have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluations; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.          The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a)             all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)             any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 10, 2015	By:	/s/ Stanley C. Erck
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL AND ACCOUNTING OFFICER

I, Barclay A. Phillips, certify that:

1.          I have reviewed this Quarterly Report on Form 10-Q of Novavax, Inc.;

2.          Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.          Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.          The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and we have:

a)           designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)           designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)           evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluations; and

d)           disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.          The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a)           all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)           any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 10, 2015	By:	/s/ Barclay A. Phillips
	Senior Vice President, Chief Financial Officer and Treasurer

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT

TO 18 UNITED STATES C. §1350
(SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002)

In connection with the Quarterly Report of Novavax, Inc. (the “Company”) on Form 10-Q for the fiscal period ended June 30, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Stanley C. Erck, President and Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1)            The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2)            The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company for the dates and periods covered by this Report.

Date: August 10, 2015	By:	/s/ Stanley C. Erck
	President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL AND ACCOUNTING OFFICER
PURSUANT TO 18 UNITED STATES C. §1350
(SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002)

In connection with the Quarterly Report of Novavax, Inc. (the “Company”) on Form 10-Q for the fiscal period ended June 30, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Barclay A. Phillips, Senior Vice President, Chief Financial Officer and Treasurer, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1)              The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2)              The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company for the dates and periods covered by this Report.

Date: August 10, 2015	By:	/s/ Barclay A. Phillips
	Senior Vice President, Chief Financial Officer and Treasurer

XML

U.S. Government Agreement, Joint Venture and Collaborations (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended		75 Months Ended
	Oct. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2015	Sep. 30, 2014	Oct. 31, 2013	Dec. 31, 2011
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Ownership percentage		20.00%		20.00%				20.00%
Government contracts		$ 13,720	$ 7,241	$ 22,966	$ 12,713			$ 101,000
Research and development collaborations		$ 276	$ 1,018	$ 906	$ 3,008
Cadila [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Joint Venture Percentage Owned By Others		80.00%		80.00%				80.00%
HHS BARDA Contract [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Government contracts				$ 3,100
Government Contract Receivable									$ 97,000
Increase in funding for recovery of additional costs under contract		$ 7,700
HHS BARDA Option for Additional Period [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Government Contract Receivable									$ 70,000
License Agreement with LG Life Sciences, Ltd. [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront license payment											$ 2,500
PATH Vaccine Solutions [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Research and development collaborations		$ 100		$ 500				$ 6,800
Research and development collaboration increase										$ 400
Contract	$ 1,000					$ 3,500	$ 2,000

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Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		6 Months Ended
	Jul. 31, 2015	Mar. 31, 2015	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Subsidiary, Sale of Stock [Line Items]
Common Stock, Shares Authorized			600,000,000		300,000,000
Proceeds from Issuance of Common Stock			$ 197,093	$ 107,900
Public Offering [Member]
Subsidiary, Sale of Stock [Line Items]
Sales per share price range		$ 7.25
Shares sold		27,758,620
Common stock issued upon exercise in full over-allotment granted		3,620,689
Proceeds from shares sold		$ 190,000
Offering costs		$ 11,600
2012 Sales Agreement [Member]
Subsidiary, Sale of Stock [Line Items]
Sales per share price range			$ 10.01
Shares sold			800,000
Proceeds from shares sold			$ 8,000
Proceeds from Issuance of Common Stock			700
2012 Sales Agreement [Member] | Subsequent Event [Member]
Subsidiary, Sale of Stock [Line Items]
Sales per share price range	$ 11.53
Shares sold	600,000
Proceeds from shares sold	$ 6,600
Maximum [Member] | 2012 Sales Agreement [Member]
Subsidiary, Sale of Stock [Line Items]
Common stock authorized for issuance under prior shelf registration statement with SEC, dollar amount			$ 50,000

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Summary of Significant Accounting Policies [Line Items]
Number of shares excluded from the computation of net loss per share	23,248,254	16,514,230
Foreign currency translation adjustment	$ 8.7		$ 6.5
Restricted Cash and Cash Equivalents, Noncurrent	$ 0.8		$ 0.8

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Stock-Based Compensation (Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,580	$ 1,852	$ 4,514	$ 2,892
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,090	651	2,122	1,175
General and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,490	$ 1,201	$ 2,392	$ 1,717

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Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2015

Summary of Significant Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 3 – Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. The consolidated balance sheet as of June 30, 2015, the consolidated statements of operations and the consolidated statements of comprehensive loss for the three and six months ended June 30, 2015 and 2014 and the consolidated statements of cash flows for the six months ended June 30, 2015 and 2014 are unaudited, but include all adjustments (consisting of normal recurring adjustments) that the Company considers necessary for a fair presentation of the financial position, operating results, comprehensive loss and cash flows, respectively, for the periods presented. Although the Company believes that the disclosures in these consolidated financial statements are adequate to make the information presented not misleading, certain information and footnote information normally included in consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted as permitted under the rules and regulations of the United States Securities and Exchange Commission (“SEC”).

The unaudited consolidated financial statements include the accounts of Novavax, Inc. and its wholly owned subsidiary, Novavax AB. All intercompany accounts and transactions have been eliminated in consolidation.

The accompanying consolidated financial statements are presented in U.S. dollars. The functional currency of Novavax AB, which is located in Sweden, is the local currency (Swedish Krona). The translation of assets and liabilities of Novavax AB to U.S. dollars is made at the exchange rate in effect at the consolidated balance sheet date, while equity accounts are translated at historical rates. The translation of the statement of operations data is made at the average exchange rate in effect for the period. The translation of operating cash flow data is made at the average exchange rate in effect for the period, and investing and financing cash flow data is translated at the exchange rate in effect at the date of the underlying transaction. Translation gains and losses are recognized as a component of accumulated other comprehensive loss in the accompanying consolidated balance sheets. The foreign currency translation adjustment balance included in accumulated other comprehensive loss was $8.7 million and $6.5 million at June 30, 2015 and December 31, 2014, respectively.

The accompanying unaudited consolidated financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. Results for this or any interim period are not necessarily indicative of results for any future interim period or for the entire year. The Company operates in one business segment.

Use of Estimates

The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates.

Cash and Cash Equivalents

Cash and cash equivalents consist of highly liquid investments with maturities of three months or less from the date of purchase. Cash and cash equivalents consist of the following at (in thousands):

	June 30,		December 31,
	2015		2014
Cash	$	13,203	$	4,481
Money market funds		125,090		20,354
Government-backed security		28,000		7,500
Asset-backed securities		1,091		—
Cash and cash equivalents	$	167,384	$	32,335

Cash equivalents are recorded at cost plus accrued interest, which approximate fair value due to their short-term nature.

Fair Value Measurements

The Company applies Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements and Disclosures, for financial and non-financial assets and liabilities.

ASC 820 discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost). The statement utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels:

· Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities.

· Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.

· Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions.

Marketable Securities

Marketable securities consist of commercial paper, asset-backed securities and corporate notes. Classification of marketable securities between current and non-current is dependent upon the maturity date at the balance sheet date taking into consideration the Company’s ability and intent to hold the investment to maturity.

Interest and dividend income is recorded when earned and included in investment income in the consolidated statements of operations. Premiums and discounts, if any, on marketable securities are amortized or accreted to maturity and included in investment income in the consolidated statements of operations. The specific identification method is used in computing realized gains and losses on the sale of the Company’s securities.

The Company classifies its marketable securities with readily determinable fair values as “available-for-sale.” Investments in securities that are classified as available-for-sale are measured at fair market value in the consolidated balance sheets, and unrealized holding gains and losses on marketable securities are reported as a separate component of stockholders’ equity until realized. Marketable securities are evaluated periodically to determine whether a decline in value is “other-than-temporary.” The term “other-than-temporary” is not intended to indicate a permanent decline in value. Rather, it means that the prospects for a near term recovery of value are not necessarily favorable, or that there is a lack of evidence to support fair values equal to, or greater than, the carrying value of the security. Management reviews criteria, such as the magnitude and duration of the decline, as well as the Company’s ability to hold the securities until market recovery, to predict whether the loss in value is other-than-temporary. If a decline in value is determined to be other-than-temporary, the value of the security is reduced and the impairment is recorded as other income, net in the consolidated statements of operations.

Restricted Cash

The Company’s current restricted cash at December 31, 2014 includes payments received under the prior PATH agreement (See Note 9) until such time as the Company has paid for the outside services performed under the agreement. In addition, the Company’s non-current restricted cash with respect to its manufacturing, laboratory and office space in Gaithersburg, Maryland functions as collateral for letters of credit, which serve as security deposits for the duration of the leases. At June 30, 2015 and December 31, 2014, non-current restricted cash is $0.8 million and is recorded as other non-current assets on the consolidated balance sheets.

Revenue Recognition

The Company performs research and development for U.S. Government agencies and other collaborators under cost reimbursable and fixed price contracts, including license and clinical development agreements. The Company recognizes revenue under research contracts when a contract has been executed, the contract price is fixed or determinable, delivery of services or products has occurred and collection of the contract price is reasonably assured. Payments received in advance of work performed are recorded as deferred revenue and losses on contracts, if any, are recognized in the period in which they become known.

Under cost reimbursable contracts, the Company is reimbursed and recognizes revenue as allowable costs are incurred plus a portion of the fixed-fee earned. The Company considers fixed-fees under cost reimbursable contracts to be earned in proportion to the allowable costs incurred in performance of the work as compared to total estimated contract costs, with such costs incurred representing a reasonable measurement of the proportional performance of the work completed. Under its HHS BARDA contract, certain activities must be pre-approved by HHS BARDA in order for their costs to be deemed allowable direct costs. Direct costs incurred under cost reimbursable contracts are recorded as cost of government contracts revenue. The Company’s HHS BARDA contract provides the U.S. government the ability to terminate the contract for convenience or to terminate for default if the Company fails to meet its obligations as set forth in the statement of work. The Company believes that if the government were to terminate the HHS BARDA contract for convenience, the costs incurred through the effective date of such termination and any settlement costs resulting from such termination would be allowable costs. Payments to the Company under cost reimbursable contracts with agencies of the U.S. Government, such as the HHS BARDA contract, are provisional payments subject to adjustment upon annual audit by the government. An audit of fiscal year 2013 has been initiated, but has not been completed as of the date of this filing. Management believes that revenue for periods not yet audited has been recorded in amounts that are expected to be realized upon final audit and settlement. When the final determination of the allowable costs for any year has been made, revenue and billings may be adjusted accordingly in the period that the adjustments are known and collection is probable.

The Company’s collaborative research and development agreements may include an upfront payment, payments for research and development services, milestone payments and royalties. Agreements with multiple deliverables are evaluated to determine if the deliverables can be divided into more than one unit of accounting. A deliverable can generally be considered a separate unit of accounting if both of the following criteria are met: (1) the delivered item(s) has value to the customer on a stand-alone basis; and (2) if the arrangement includes a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) is considered probable and substantially in control of the Company. Deliverables that cannot be divided into separate units are combined and treated as one unit of accounting. Consideration received is allocated among the separate units of accounting based on the relative selling price method. Deliverables under these arrangements typically include rights to intellectual property, research and development services and involvement by the parties in steering committees. Historically, deliverables under the Company’s collaborative research and development agreements have been deemed to have no stand-alone value and as a result have been treated as a single unit of accounting. In addition, the Company analyzes its contracts and collaborative agreements to determine whether the payments received should be recorded as revenue or as a reduction to research and development expenses. In reaching this determination, management considers a number of factors, including whether the Company is principal under the arrangement, and whether the arrangement is significant to, and part of, the Company’s core operations. Historically, payments received under its contracts and collaborative agreements have been recognized as revenue since the Company acts as a principal in the arrangement and the activities are core to its operations.

When the performance under a fixed price contract can be reasonably estimated, revenue for fixed price contracts is recognized under the proportional performance method and earned in proportion to the contract costs incurred in performance of the work as compared to total estimated contract costs. Costs incurred under fixed price contracts represent a reasonable measurement of proportional performance of the work. Direct costs incurred under collaborative research and development agreements are recorded as research and development expenses. If the performance under a fixed price contract cannot be reasonably estimated, the Company recognizes the revenue on a straight-line basis over the contract term.

Revenue associated with upfront payments under arrangements is recognized over the contract term or when all obligations associated with the upfront payment have been satisfied.

Revenue from the achievement of research and development milestones, if deemed substantive, is recognized as revenue when the milestones are achieved and the milestone payments are due and collectible. If not deemed substantive, the Company would recognize such milestone as revenue upon its achievement on a straight-line basis over the remaining expected term of the research and development period. Milestones are considered substantive if all of the following conditions are met: (1) the milestone is non-refundable; (2) there is substantive uncertainty of achievement of the milestone at the inception of the arrangement; (3) substantive effort is involved to achieve the milestone and such achievement relates to past performance; and (4) the amount of the milestone appears reasonable in relation to the effort expended and all of the deliverables and payment terms in the arrangement.

Net Loss per Share

Net loss per share is computed using the weighted average number of shares of common stock outstanding. All outstanding stock options and unvested restricted stock awards totaling 23,248,254 and 16,514,230 at June 30, 2015 and 2014, respectively, are excluded from the computation, as their effect is antidilutive.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance under Topic 605, Revenue Recognition. The new standard requires a company to recognize revenue when it transfers goods and services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. ASU 2014-09 defines a five-step process that includes identifying the contract with the customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations in the contract and recognizing revenue when (or as) the entity satisfies the performance obligations. In July 2015, the FASB approved a one-year deferral of the effective date of the new standard to 2018 for public companies, with an option that would permit companies to adopt the new standard as early as the original effective date of 2017. Early adoption prior to the original effective date is not permitted. The Company is evaluating the potential impact that ASU 2014-09 will have on its consolidated financial position and results of operations.

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Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Goodwill [Line Items]
Balance at December 31, 2014	$ 54,612
Currency translation adjustments	(1,305)
Balance at June 30, 2015	$ 53,307

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Marketable Securities (Narrative) (Details) - Major Types of Debt and Equity Securities [Domain] - USD ($) shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Unrealized Loss	$ 34	$ 73
Available-For-Sale Securities Number of Securities Owned	47
Available-For-Sale Securities Number Of Securities Owned Unrealized Losses	33
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Unrealized Loss	$ 100

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Goodwill and Other Intangible Assets (Schedule of Identifiable Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 13,018	$ 13,884
Accumulated Amortization	(1,658)	(1,307)
Intangible Assets, Net	11,360	12,577
Collaboration agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,049	4,319
Accumulated Amortization	(798)	(629)
Intangible Assets, Net	3,251	3,690
Proprietary adjuvant technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,969	9,565
Accumulated Amortization	(860)	(678)
Intangible Assets, Net	$ 8,109	$ 8,887

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Goodwill and Other Intangible Assets (Schedule of Estimated Amortization Expense) (Details) $ in Thousands	Jun. 30, 2015 USD ($)
Finite-Lived Intangible Assets [Line Items]
2015 (remainder)	$ 433
2016	865
2017	865
2018	865
2019	865
2020	$ 865

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Operations

6 Months Ended

Jun. 30, 2015

Operations [Abstract]

Operations

Note 2 – Operations

The Company’s vaccine candidates currently under development, some of which include adjuvants, will require significant additional research and development efforts that include extensive preclinical studies and clinical testing, and regulatory approval prior to commercial use.

As a clinical-stage vaccine company, the Company has primarily funded its operations from proceeds through the sale of its common stock in equity offerings and revenue under its contract with the Department of Health and Human Services, Biomedical Advanced Research and Development Authority (“HHS BARDA”) and, to a lesser degree, revenue under its prior contract with PATH Vaccine Solutions (“PATH”). Management regularly reviews the Company’s cash and cash equivalents and marketable securities relative to its operating budget and forecast to monitor the sufficiency of the Company’s working capital, and anticipates continuing to draw upon available sources of capital to support its product development activities.

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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 0.4	$ 0.6

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Master Services Agreement with Cadila (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total	Total
Related Party Transaction [Line Items]
Services purchased	$ 1.0	$ 6.7
Remaining obligation under Master Services Agreement	0.8
Maximum [Member]
Related Party Transaction [Line Items]
Total amount of services to be provided	7.5
Payment for portion of shortfall	$ 2.0

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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 167,384	$ 32,335
Marketable securities	147,554	135,721
Restricted cash	0	297
Accounts receivable - billed	2,342	7,510
Account receivable - unbilled	2,498	3,100
Prepaid expenses and other current assets	13,201	9,195
Total current assets	332,979	188,158
Property and equipment, net	26,134	19,737
Intangible assets, net	11,360	12,577
Goodwill	53,307	54,612
Other non-current assets	918	918
Total assets	424,698	276,002
Current liabilities:
Accounts payable	7,117	12,908
Accrued expenses	16,522	19,397
Current portion of notes payable	532	603
Deferred rent	1,187	1,138
Other current liabilities	1,695	70
Total current liabilities	27,053	34,116
Deferred revenue	2,500	2,500
Non-current portion of notes payable	149	395
Deferred rent	7,320	7,734
Other non-current liabilities	73	1,639
Total liabilities	37,095	46,384
Commitments and contingences	0	0
Stockholders’ equity:
Preferred stock, $0.01 par value, 2,000,000 shares authorized; no shares issued and outstanding as of June 30, 2015 and December 31, 2014, respectively	0	0
Common stock, $0.01 par value, 600,000,000 shares authorized at June 30, 2015 and 300,000,000 shares authorized at December 31, 2014; 269,095,405 shares issued and 268,639,975 shares outstanding at June 30, 2015 and 239,287,294 shares issued and 238,831,864 shares outstanding at December 31, 2014	2,691	2,393
Additional paid-in capital	934,176	729,373
Accumulated deficit	(538,104)	(493,093)
Treasury stock, 455,430 shares, cost basis at both June 30, 2015 and December 31, 2014	(2,450)	(2,450)
Accumulated other comprehensive loss	(8,710)	(6,605)
Total stockholders’ equity	387,603	229,618
Total liabilities and stockholders’ equity	$ 424,698	$ 276,002

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating Activities:
Net loss	$ (45,011)	$ (31,674)
Reconciliation of net loss to net cash used in operating activities:
Depreciation and amortization	2,795	1,956
Amortization of net premiums on marketable securities	593	(80)
Deferred rent	(365)	(45)
Non-cash stock-based compensation	4,514	2,892
Realized gains on marketable securities	0	(615)
Other	78	4
Changes in operating assets and liabilities:
Restricted cash	297	1,214
Accounts receivable - billed	5,364	(1,828)
Accounts receivable - unbilled	602	149
Prepaid expenses and other assets	(3,449)	(1,823)
Accounts payable and accrued expenses	(8,339)	(1,279)
Deferred revenue	109	(243)
Net cash used in operating activities	(42,812)	(31,372)
Investing Activities:
Capital expenditures	(9,240)	(1,846)
Proceeds from disposal of property and equipment	0	12
Proceeds from maturities of marketable securities	63,350	13,440
Purchases of marketable securities	(75,729)	(104,686)
Net cash used in investing activities	(21,619)	(93,080)
Financing Activities:
Principal payments on capital leases	(33)	(32)
Principal payments on notes payable	(315)	(338)
Changes in restricted cash	0	(1)
Cash paid with the Novavax AB acquisition	0	(171)
Net proceeds from sales of common stock	197,093	107,900
Proceeds from the exercise of stock options and employee stock purchases	2,815	1,510
Net cash provided by financing activities	199,560	108,868
Effect of exchange rate on cash and cash equivalents	(80)	(30)
Net increase (decrease) in cash and cash equivalents	135,049	(15,614)
Cash and cash equivalents at beginning of period	32,335	119,471
Cash and cash equivalents at end of period	167,384	103,857
Supplemental disclosure of non-cash activities:
Property and equipment purchases included in accounts payable and accrued expenses	2,165	840
Sale of common stock under the Sales Agreement not settled at quarter-end	679	0
Supplemental disclosure of cash flow information:
Cash payments of interest	$ 57	$ 100

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Stock-Based Compensation (Assumptions Used in Estimation of Fair Value of Stock) (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Black-Scholes fair value of stock options granted	$ 4.42	$ 1.92	$ 4.42	$ 2.48
Risk-free interest rate, minimum	1.37%	1.33%	1.19%	1.24%
Risk-free interest rate, maximum	2.13%	1.39%	2.13%	2.22%
Dividend yield	0.00%	0.00%	0.00%	0.00%
Volatility, minimum	54.18%	52.87%	53.58%	52.47%
Volatility, maximum	68.39%	53.81%	68.39%	67.93%
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	0.07%	0.11%	0.05%	0.11%
Risk-free interest rate, maximum	0.35%	0.14%	0.35%	0.14%
Dividend yield	0.00%	0.00%	0.00%	0.00%
Volatility, minimum	40.79%	53.80%	40.79%	53.80%
Volatility, maximum	64.24%	67.57%	64.24%	67.57%
Expected forfeiture rate	5.00%	5.00%	5.00%	5.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	3 years 11 months 23 days	4 years 1 month 6 days	3 years 11 months 23 days	4 years 14 days
Expected forfeiture rate	0.00%	0.00%	0.00%	0.00%
Minimum [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Black-Scholes fair value of stock options granted	$ 1.20	$ 0.97	$ 1.06	$ 0.97
Expected term (in years)	6 months	6 months	6 months	6 months
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	7 years 4 months 2 days	4 years 3 months 4 days	7 years 4 months 2 days	6 years 11 months 16 days
Expected forfeiture rate	16.33%	23.15%	16.33%	23.15%
Maximum [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Black-Scholes fair value of stock options granted	$ 2.24	$ 1.79	$ 2.24	$ 1.79
Expected term (in years)	2 years	1 year	2 years	1 year

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Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2015

Goodwill and Other Intangible Assets [Abstract]

Schedule of Goodwill

The change in the carrying amounts of goodwill for the six months ended June 30, 2015 was as follows (in thousands):

	Amount
Balance at December 31, 2014	$	54,612
Currency translation adjustments		(1,305)
Balance at June 30, 2015	$	53,307

Schedule of Identifiable Intangible Assets

Purchased intangible assets consisted of the following as of June 30, 2015 and December 31, 2014 (in thousands):

	June 30, 2015						December 31, 2014
	Gross						Gross
	Carrying		Accumulated		Intangible		Carrying		Accumulated		Intangible
	Amount		Amortization		Assets, Net		Amount		Amortization		Assets, Net
Finite-lived intangible assets:
Proprietary adjuvant technology	$	8,969	$	(860)	$	8,109	$	9,565	$	(678)	$	8,887
Collaboration agreements		4,049		(798)		3,251		4,319		(629)		3,690
Total identifiable intangible assets	$	13,018	$	(1,658)	$	11,360	$	13,884	$	(1,307)	$	12,577

Schedule of Estimated Amortization Expense

Estimated amortization expense for existing intangible assets for the remainder of 2015 and for each of the five succeeding years ending December 31 will be as follows (in thousands):

Year	Amount
2015 (remainder)	$	433
2016		865
2017		865
2018		865
2019		865
2020		865

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Stock-Based Compensation (Summary of Restricted Stock Awards Activity) (Details) - 6 months ended Jun. 30, 2015 - $ / shares	Total
Number of shares
Outstanding and Unvested at January 1, 2015	15,000
Restricted stock granted	0
Restricted stock vested	0
Restricted stock forfeited	0
Outstanding and Unvested at June 30, 2015	15,000
Per Share Weighted-Average Grant-Date Fair Value
Outstanding and Unvested at January 1, 2015	$ 4.48
Restricted stock granted	0
Restricted stock vested	0
Restricted stock forfeited	0
Outstanding and Unvested at June 30, 2015	$ 4.48

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Summary of Significant Accounting Policies (Cash and Equivalents) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 167,384	$ 32,335	$ 103,857	$ 119,471
Cash [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	13,203	4,481
Money market funds [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	125,090	20,354
Government-backed security [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	28,000	7,500
Asset-backed Securities [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 1,091	$ 0

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Organization

6 Months Ended

Jun. 30, 2015

Organization [Abstract]

Organization

Note 1 – Organization

Novavax, Inc. (“Novavax,” and together with its wholly owned subsidiary “Novavax AB,” the “Company”) is a clinical-stage vaccine company focused on the discovery, development and commercialization of recombinant nanoparticle vaccines and adjuvants. The Company’s product pipeline targets a variety of infectious diseases with vaccine candidates currently in clinical development for respiratory syncytial virus (“RSV”), seasonal influenza, pandemic influenza and Ebola virus (“EBOV”). The Company has additional preclinical stage programs in a variety of infectious diseases, including Middle East Respiratory Syndrome (“MERS”).

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Preferred stock, par or stated value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	600,000,000	300,000,000
Common stock, shares issued	269,095,405	239,287,294
Common stock, shares outstanding	268,639,975	238,831,864

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License agreement with Wyeth Holding Corporation

6 Months Ended

Jun. 30, 2015

License agreement with Wyeth Holding Corporation

License agreement with Wyeth Holding Corporation

Note 11 – License agreement with Wyeth Holding Corporation

In 2007, the Company entered into an agreement to license certain rights from Wyeth Holding Corporation, a subsidiary of Pfizer Inc. (“Wyeth”). The Wyeth license is a non-exclusive, worldwide license to a family of patents and patent applications covering VLP technology for use in human vaccines in certain fields, with expected patent expiration in early 2022. The Wyeth license provides for the Company to make an upfront payment (previously made), ongoing annual license fees, sublicense payments, milestone payments on certain development activities and royalties on any product sales. The milestone payments are one-time only payments applicable to each related vaccine program. At present, the Company’s seasonal influenza VLP vaccine program (including CPLB’s seasonal influenza program) and its pandemic influenza VLP vaccine program are the only two programs to which the Wyeth license applies. The license may be terminated by Wyeth only for cause and may be terminated by the Company only after it has provided ninety (90) days’ notice that the Company has absolutely and finally ceased activity, including through any affiliate or sublicense, related to the manufacturing, development, marketing or sale of products covered by the license. Payments under the agreement to Wyeth as of June 30, 2015 aggregated $6.4 million. The Company is currently in discussions with Wyeth to potentially amend the agreement and restructure the milestone payment owed as a result of CPLB’s initiation of a Phase 3 clinical trial for its seasonal influenza VLP vaccine candidate in the third quarter of 2014. Such milestone payment is only owed once for the Company’s seasonal influenza VLP vaccine program and it would not be required to make another payment if it or any of its affiliates initiate an additional Phase 3 clinical trial in a seasonal influenza VLP vaccine candidate. The $3.0 million milestone continues to be accrued for on the consolidated balance sheet at June 30, 2015 and was recorded as a research and development expense in the third quarter of 2014.

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Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Entity Registrant Name	NOVAVAX INC
Entity Central Index Key	0001000694
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Trading Symbol	NVAX
Entity Common Stock, Shares Outstanding		269,640,511

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Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2015

Summary of Significant Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. The consolidated balance sheet as of June 30, 2015, the consolidated statements of operations and the consolidated statements of comprehensive loss for the three and six months ended June 30, 2015 and 2014 and the consolidated statements of cash flows for the six months ended June 30, 2015 and 2014 are unaudited, but include all adjustments (consisting of normal recurring adjustments) that the Company considers necessary for a fair presentation of the financial position, operating results, comprehensive loss and cash flows, respectively, for the periods presented. Although the Company believes that the disclosures in these consolidated financial statements are adequate to make the information presented not misleading, certain information and footnote information normally included in consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted as permitted under the rules and regulations of the United States Securities and Exchange Commission (“SEC”).

The unaudited consolidated financial statements include the accounts of Novavax, Inc. and its wholly owned subsidiary, Novavax AB. All intercompany accounts and transactions have been eliminated in consolidation.

The accompanying consolidated financial statements are presented in U.S. dollars. The functional currency of Novavax AB, which is located in Sweden, is the local currency (Swedish Krona). The translation of assets and liabilities of Novavax AB to U.S. dollars is made at the exchange rate in effect at the consolidated balance sheet date, while equity accounts are translated at historical rates. The translation of the statement of operations data is made at the average exchange rate in effect for the period. The translation of operating cash flow data is made at the average exchange rate in effect for the period, and investing and financing cash flow data is translated at the exchange rate in effect at the date of the underlying transaction. Translation gains and losses are recognized as a component of accumulated other comprehensive loss in the accompanying consolidated balance sheets. The foreign currency translation adjustment balance included in accumulated other comprehensive loss was $8.7 million and $6.5 million at June 30, 2015 and December 31, 2014, respectively.

The accompanying unaudited consolidated financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. Results for this or any interim period are not necessarily indicative of results for any future interim period or for the entire year. The Company operates in one business segment.

Use of Estimates

Use of Estimates

The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates.

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and cash equivalents consist of highly liquid investments with maturities of three months or less from the date of purchase. Cash and cash equivalents consist of the following at (in thousands):

	June 30,		December 31,
	2015		2014
Cash	$	13,203	$	4,481
Money market funds		125,090		20,354
Government-backed security		28,000		7,500
Asset-backed securities		1,091		—
Cash and cash equivalents	$	167,384	$	32,335

Cash equivalents are recorded at cost plus accrued interest, which approximate fair value due to their short-term nature.

Fair Value Measurements

Fair Value Measurements

The Company applies Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements and Disclosures, for financial and non-financial assets and liabilities.

ASC 820 discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost). The statement utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels:

· Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities.

· Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.

· Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions.

Marketable Securities

Marketable Securities

Marketable securities consist of commercial paper, asset-backed securities and corporate notes. Classification of marketable securities between current and non-current is dependent upon the maturity date at the balance sheet date taking into consideration the Company’s ability and intent to hold the investment to maturity.

Interest and dividend income is recorded when earned and included in investment income in the consolidated statements of operations. Premiums and discounts, if any, on marketable securities are amortized or accreted to maturity and included in investment income in the consolidated statements of operations. The specific identification method is used in computing realized gains and losses on the sale of the Company’s securities.

The Company classifies its marketable securities with readily determinable fair values as “available-for-sale.” Investments in securities that are classified as available-for-sale are measured at fair market value in the consolidated balance sheets, and unrealized holding gains and losses on marketable securities are reported as a separate component of stockholders’ equity until realized. Marketable securities are evaluated periodically to determine whether a decline in value is “other-than-temporary.” The term “other-than-temporary” is not intended to indicate a permanent decline in value. Rather, it means that the prospects for a near term recovery of value are not necessarily favorable, or that there is a lack of evidence to support fair values equal to, or greater than, the carrying value of the security. Management reviews criteria, such as the magnitude and duration of the decline, as well as the Company’s ability to hold the securities until market recovery, to predict whether the loss in value is other-than-temporary. If a decline in value is determined to be other-than-temporary, the value of the security is reduced and the impairment is recorded as other income, net in the consolidated statements of operations.

Restricted Cash

Restricted Cash

The Company’s current restricted cash at December 31, 2014 includes payments received under the prior PATH agreement (See Note 9) until such time as the Company has paid for the outside services performed under the agreement. In addition, the Company’s non-current restricted cash with respect to its manufacturing, laboratory and office space in Gaithersburg, Maryland functions as collateral for letters of credit, which serve as security deposits for the duration of the leases. At June 30, 2015 and December 31, 2014, non-current restricted cash is $0.8 million and is recorded as other non-current assets on the consolidated balance sheets.

Revenue Recognition

Revenue Recognition

The Company performs research and development for U.S. Government agencies and other collaborators under cost reimbursable and fixed price contracts, including license and clinical development agreements. The Company recognizes revenue under research contracts when a contract has been executed, the contract price is fixed or determinable, delivery of services or products has occurred and collection of the contract price is reasonably assured. Payments received in advance of work performed are recorded as deferred revenue and losses on contracts, if any, are recognized in the period in which they become known.

Under cost reimbursable contracts, the Company is reimbursed and recognizes revenue as allowable costs are incurred plus a portion of the fixed-fee earned. The Company considers fixed-fees under cost reimbursable contracts to be earned in proportion to the allowable costs incurred in performance of the work as compared to total estimated contract costs, with such costs incurred representing a reasonable measurement of the proportional performance of the work completed. Under its HHS BARDA contract, certain activities must be pre-approved by HHS BARDA in order for their costs to be deemed allowable direct costs. Direct costs incurred under cost reimbursable contracts are recorded as cost of government contracts revenue. The Company’s HHS BARDA contract provides the U.S. government the ability to terminate the contract for convenience or to terminate for default if the Company fails to meet its obligations as set forth in the statement of work. The Company believes that if the government were to terminate the HHS BARDA contract for convenience, the costs incurred through the effective date of such termination and any settlement costs resulting from such termination would be allowable costs. Payments to the Company under cost reimbursable contracts with agencies of the U.S. Government, such as the HHS BARDA contract, are provisional payments subject to adjustment upon annual audit by the government. An audit of fiscal year 2013 has been initiated, but has not been completed as of the date of this filing. Management believes that revenue for periods not yet audited has been recorded in amounts that are expected to be realized upon final audit and settlement. When the final determination of the allowable costs for any year has been made, revenue and billings may be adjusted accordingly in the period that the adjustments are known and collection is probable.

The Company’s collaborative research and development agreements may include an upfront payment, payments for research and development services, milestone payments and royalties. Agreements with multiple deliverables are evaluated to determine if the deliverables can be divided into more than one unit of accounting. A deliverable can generally be considered a separate unit of accounting if both of the following criteria are met: (1) the delivered item(s) has value to the customer on a stand-alone basis; and (2) if the arrangement includes a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) is considered probable and substantially in control of the Company. Deliverables that cannot be divided into separate units are combined and treated as one unit of accounting. Consideration received is allocated among the separate units of accounting based on the relative selling price method. Deliverables under these arrangements typically include rights to intellectual property, research and development services and involvement by the parties in steering committees. Historically, deliverables under the Company’s collaborative research and development agreements have been deemed to have no stand-alone value and as a result have been treated as a single unit of accounting. In addition, the Company analyzes its contracts and collaborative agreements to determine whether the payments received should be recorded as revenue or as a reduction to research and development expenses. In reaching this determination, management considers a number of factors, including whether the Company is principal under the arrangement, and whether the arrangement is significant to, and part of, the Company’s core operations. Historically, payments received under its contracts and collaborative agreements have been recognized as revenue since the Company acts as a principal in the arrangement and the activities are core to its operations.

When the performance under a fixed price contract can be reasonably estimated, revenue for fixed price contracts is recognized under the proportional performance method and earned in proportion to the contract costs incurred in performance of the work as compared to total estimated contract costs. Costs incurred under fixed price contracts represent a reasonable measurement of proportional performance of the work. Direct costs incurred under collaborative research and development agreements are recorded as research and development expenses. If the performance under a fixed price contract cannot be reasonably estimated, the Company recognizes the revenue on a straight-line basis over the contract term.

Revenue associated with upfront payments under arrangements is recognized over the contract term or when all obligations associated with the upfront payment have been satisfied.

Revenue from the achievement of research and development milestones, if deemed substantive, is recognized as revenue when the milestones are achieved and the milestone payments are due and collectible. If not deemed substantive, the Company would recognize such milestone as revenue upon its achievement on a straight-line basis over the remaining expected term of the research and development period. Milestones are considered substantive if all of the following conditions are met: (1) the milestone is non-refundable; (2) there is substantive uncertainty of achievement of the milestone at the inception of the arrangement; (3) substantive effort is involved to achieve the milestone and such achievement relates to past performance; and (4) the amount of the milestone appears reasonable in relation to the effort expended and all of the deliverables and payment terms in the arrangement.

Net Loss per Share

Net Loss per Share

Net loss per share is computed using the weighted average number of shares of common stock outstanding. All outstanding stock options and unvested restricted stock awards totaling 23,248,254 and 16,514,230 at June 30, 2015 and 2014, respectively, are excluded from the computation, as their effect is antidilutive.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance under Topic 605, Revenue Recognition. The new standard requires a company to recognize revenue when it transfers goods and services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. ASU 2014-09 defines a five-step process that includes identifying the contract with the customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations in the contract and recognizing revenue when (or as) the entity satisfies the performance obligations. In July 2015, the FASB approved a one-year deferral of the effective date of the new standard to 2018 for public companies, with an option that would permit companies to adopt the new standard as early as the original effective date of 2017. Early adoption prior to the original effective date is not permitted. The Company is evaluating the potential impact that ASU 2014-09 will have on its consolidated financial position and results of operations.

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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Government contracts	$ 13,720	$ 7,241	$ 22,966	$ 12,713
Research and development collaborations	276	1,018	906	3,008
Total revenue	13,996	8,259	23,872	15,721
Costs and expenses:
Cost of government contracts revenue	2,687	5,102	5,307	8,123
Research and development	25,042	15,202	50,769	29,720
General and administrative	7,088	5,806	12,931	10,114
Total costs and expenses	34,817	26,110	69,007	47,957
Loss from operations	(20,821)	(17,851)	(45,135)	(32,236)
Other income (expense):
Investment income	134	20	256	32
Interest expense	(26)	(51)	(62)	(103)
Other income (expense)	72	18	(70)	18
Realized gains on marketable securities	0	0	0	615
Net loss	$ (20,641)	$ (17,864)	$ (45,011)	$ (31,674)
Basic and diluted net loss per share	$ (0.08)	$ (0.08)	$ (0.18)	$ (0.15)
Basic and diluted weighted average number of common shares outstanding (in shares)	268,083	217,178	254,727	213,075

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Goodwill and Other Intangible Assets

6 Months Ended

Jun. 30, 2015

Goodwill and Other Intangible Assets [Abstract]

Goodwill and Other Intangible Assets

Note 6 – Goodwill and Other Intangible Assets

Goodwill

The change in the carrying amounts of goodwill for the six months ended June 30, 2015 was as follows (in thousands):

	Amount
Balance at December 31, 2014	$	54,612
Currency translation adjustments		(1,305)
Balance at June 30, 2015	$	53,307

Identifiable Intangible Assets

Purchased intangible assets consisted of the following as of June 30, 2015 and December 31, 2014 (in thousands):

	June 30, 2015						December 31, 2014
	Gross						Gross
	Carrying		Accumulated		Intangible		Carrying		Accumulated		Intangible
	Amount		Amortization		Assets, Net		Amount		Amortization		Assets, Net
Finite-lived intangible assets:
Proprietary adjuvant technology	$	8,969	$	(860)	$	8,109	$	9,565	$	(678)	$	8,887
Collaboration agreements		4,049		(798)		3,251		4,319		(629)		3,690
Total identifiable intangible assets	$	13,018	$	(1,658)	$	11,360	$	13,884	$	(1,307)	$	12,577

Amortization expense for the six months ended June 30, 2015 and 2014 was $0.4 million and $0.6 million, respectively. 

Estimated amortization expense for existing intangible assets for the remainder of 2015 and for each of the five succeeding years ending December 31 will be as follows (in thousands):

Year	Amount
2015 (remainder)	$	433
2016		865
2017		865
2018		865
2019		865
2020		865

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Marketable Securities

6 Months Ended

Jun. 30, 2015

Investments [Abstract]

Marketable Securities

Note 5 – Marketable Securities

Marketable securities classified as available-for-sale as of June 30, 2015 and December 31, 2014 were comprised of (in thousands):

	June 30, 2015								December 31, 2014
			Gross		Gross						Gross		Gross
	Amortized		Unrealized		Unrealized				Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value		Cost		Gains		Losses		Fair Value
Asset-backed securities	$	48,381	$	1	$	(7)	$	48,375	$	46,660	$	—	$	(36)	$	46,624
Corporate debt securities		99,189		17		(27)		99,179		89,126		8		(37)		89,097
Total	$	147,570	$	18	$	(34)	$	147,554	$	135,786	$	8	$	(73)	$	135,721

Marketable Securities – Unrealized Losses

The Company owned 47 available-for-sale securities as of June 30, 2015. Of these 47 securities, 33 had combined unrealized losses of less than $0.1 million as of June 30, 2015. The Company did not have any investments in a loss position for greater than 12 months as of June 30, 2015. The Company has evaluated its marketable securities and has determined that none of these investments has an other-than-temporary impairment, as it has no intent to sell securities with unrealized losses and it is not more likely than not that the Company will be required to sell any securities with unrealized losses, given the Company’s current and anticipated financial position.

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]

Summary of Option Activity

The following is a summary of option activity under the 2015 Plan, 2005 Plan and the 1995 Stock Option Plan (“1995 Plan”) for the six months ended June 30, 2015:

	2015 Plan				2005 Plan				1995 Plan
			Weighted-				Weighted-				Weighted-
			Average				Average				Average
	Stock		Exercise		Stock		Exercise		Stock		Exercise
	Options		Price		Options		Price		Options		Price
Outstanding at January 1, 2015		—	$	—		16,928,098	$	3.24		35,000	$	2.21
Granted		7,369,441	$	8.97		22,500	$	6.70		—	$	—
Exercised		—	$	—		(877,910)	$	2.24		(35,000)	$	2.21
Canceled		(55,500)	$	8.94		(153,375)	$	3.92		—	$	—
Outstanding at June 30, 2015		7,313,941	$	8.97		15,919,313	$	3.29		—	$	—
Shares exercisable at June 30, 2015		—	$	—		8,320,563	$	2.51		—	$	—
Shares available for grant at June 30, 2015		17,686,059

Assumptions used to Estimate Grant Date Fair Value of Stock Options granted using Black-Scholes Option-Pricing Model

The fair value of stock options granted under the 2015 Plan and 2005 Plan was estimated at the date of grant or the date upon which the 2015 Plan was approved by the Company’s stockholders for stock options granted prior to that time using the Black-Scholes option-pricing model with the following assumptions:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2015	2014	2015	2014
Weighted-average Black- Scholes fair value of stock options granted	$4.42	$1.92	$4.42	$2.48
Risk-free interest rate	1.37%-2.13%	1.33%-1.39%	1.19%-2.13%	1.24%-2.22%
Dividend yield	0%	0%	0%	0%
Volatility	54.18%-68.39%	52.87%-53.81%	53.58%-68.39%	52.47%-67.93%
Expected term (in years)	3.98-7.34	4.10-4.26	3.98-7.34	4.04-6.96
Expected forfeiture rate	0%-16.33%	0%-23.15%	0%-16.33%	0%-23.15%

Summary of Restricted Stock Awards Activity

The following is a summary of restricted stock awards activity for the six months ended June 30, 2015:

			Per Share
			Weighted-
			Average
	Number of		Grant-Date
	Shares		Fair Value
Outstanding and Unvested at January 1, 2015		15,000	$	4.48
Restricted stock granted		—	$	—
Restricted stock vested		—	$	—
Restricted stock forfeited		—	$	—
Outstanding and Unvested at June 30, 2015		15,000	$	4.48

Stock-Based Compensation Expense

The Company recorded all stock-based compensation expense in the consolidated statements of operations as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2015		2014		2015		2014
Research and development	$	1,090	$	651	$	2,122	$	1,175
General and administrative		1,490		1,201		2,392		1,717
Total stock-based compensation expense	$	2,580	$	1,852	$	4,514	$	2,892

Employee Stock Purchase Plan [Member]

Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]

Assumptions used to Estimate Grant Date Fair Value of Stock Options granted using Black-Scholes Option-Pricing Model

The ESPP is considered compensatory for financial reporting purposes. As such, the fair value of ESPP shares was estimated at the date of grant using the Black-Scholes option-pricing model with the following assumptions: 

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2015	2014	2015	2014
Range of Black-Scholes fair value of ESPP shares granted	$1.20-$2.24	$0.97-$1.79	$1.06-$2.24	$0.97-$1.79
Risk-free interest rate	0.07%-0.35%	0.11%-0.14%	0.05%-0.35%	0.11%-0.14%
Dividend yield	0%	0%	0%	0%
Volatility	40.79%-64.24%	53.80%-67.57%	40.79%-64.24%	53.80%-67.57%
Expected term (in years)	0.5-2.0	0.5-1.0	0.5-2.0	0.5-1.0
Expected forfeiture rate	5%	5%	5%	5%

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Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Summary of Significant Accounting Policies [Abstract]

Schedule of Cash and Equivalents

Cash and cash equivalents consist of the following at (in thousands):

	June 30,		December 31,
	2015		2014
Cash	$	13,203	$	4,481
Money market funds		125,090		20,354
Government-backed security		28,000		7,500
Asset-backed securities		1,091		—
Cash and cash equivalents	$	167,384	$	32,335

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U.S. Government Agreement, Joint Venture and Collaborations

6 Months Ended

Jun. 30, 2015

U.S. Government Agreement, Joint Venture and Collaborations [Abstract]

U.S. Government Agreement, Joint Venture and Collaborations

Note 9 – U.S. Government Agreement, Joint Venture and Collaborations

HHS BARDA Contract for Recombinant Influenza Vaccines

HHS BARDA initially awarded the Company a contract in 2011, which funds the development of both the Company’s seasonal and pandemic influenza VLP vaccine candidates. The contract with HHS BARDA is a cost-plus-fixed-fee contract, which reimburses the Company for allowable direct contract costs incurred plus allowable indirect costs and a fixed-fee earned in the ongoing clinical development and product scale-up of its multivalent seasonal and monovalent pandemic H7N9 influenza VLP vaccine candidates. In September 2014, HHS BARDA exercised and initiated a two-year option to the contract, which included scope to support development activities leading up to planned Phase 3 clinical studies, added $70 million of funding on top of the remainder of the $97 million base period funding, and extended the contract until September 2016. In June 2015, the contract was amended to increase the funding by $7.7 million to allow for the recovery of additional costs under the contract relating to the settlement of indirect rates for fiscal years 2011 and 2012. This additional amount was received and recorded as revenue in the three months ended June 30, 2015. During the three and six months ended June 30, 2015, the Company recognized revenue of $13.7 million and $23.0 million, respectively, and has recognized approximately $101 million in revenue since the inception of the contract. Billings under the contract are based on approved provisional indirect billing rates, which permit recovery of fringe benefits, overhead and general and administrative expenses. These indirect rates are subject to audit by HHS BARDA on an annual basis. An audit of fiscal year 2013 has been initiated, but has not been completed as of the date of this filing. Management believes that revenue for periods not yet audited has been recorded in amounts that are expected to be realized upon final audit and settlement. When the final determination of the allowable costs for any year has been made, revenue and billings may be adjusted accordingly in the period that the adjustments are known and collection is probable.

In 2012, HHS BARDA withheld payment on the outside costs of the Company’s Phase 2 clinical trial of its seasonal quadrivalent influenza VLP vaccine candidate in Australia (“205 Trial”). Such outside costs were recorded as expenses in the period incurred as a cost of government contracts revenue and the Company did not record revenue relating to such outside costs prior to the first quarter of 2015 because collection of the amount was not reasonably assured. In late 2014, the U.S. Food and Drug Administration, Center for Biologics Evaluation and Research (“FDA”) accepted the data from the 205 Trial as part of the Company’s investigational new drug (“IND”) application for its seasonal quadrivalent influenza VLP vaccine candidate. In the first quarter of 2015, HHS BARDA approved the reimbursement of the 205 Trial costs, and the Company recorded revenue of $3.1 million as collection of the amount became reasonably assured during the period. The Company also collected this amount in 2015.        

CPLB Joint Venture

In 2009, the Company formed a joint venture with Cadila Pharmaceuticals Limited (“Cadila”) named CPL Biologicals Private Limited (“CPLB”) to develop and manufacture vaccines, biological therapeutics and diagnostics in India. CPLB is owned 20% by the Company and 80% by Cadila. The Company accounts for its investment in CPLB using the equity method. Because CPLB’s activities and operations are controlled and funded by Cadila, the Company accounts for its investment using the equity method. Since the carrying value of the Company’s initial investment was nominal and there is no guarantee or commitment to provide future funding, the Company has not recorded nor expects to record losses related to this investment in the foreseeable future.

LG Life Sciences, Ltd. (“LGLS”) License Agreement

In 2011, the Company entered into a license agreement with LGLS that allows LGLS to use the Company’s technology to develop and commercially sell influenza vaccines exclusively in South Korea and non-exclusively in certain other specified countries. At its own cost, LGLS is responsible for funding both its clinical development of the influenza VLP vaccines and a manufacturing facility to produce such vaccines in South Korea. Under the license agreement, the Company is obligated to provide LGLS with information and materials related to the manufacture of the licensed products, provide on-going project management and regulatory support and conduct clinical trials of its influenza vaccines in order to obtain FDA approval in the U.S. The term of the license agreement is expected to terminate in 2027. Payments to the Company under the license agreement include an upfront payment of $2.5 million, reimbursements of certain development and product costs, payments related to the achievement of certain milestones and royalty payments in the high single digits from LGLS’s future commercial sales of influenza VLP vaccines. The upfront payment has been deferred and recorded in deferred revenue in the consolidated balance sheets and will be recognized when the previously mentioned obligations in the agreement are satisfied, which may not occur until the end of the term of the agreement. Payments for milestones under the agreement will be recognized on a straight-line basis over the remaining term of the research and development period upon achievement of such milestone. Any royalties under the agreement will be recognized as earned.

PATH Vaccine Solutions (“PATH”) Clinical Development Agreement

In 2012, the Company entered into a clinical development agreement with PATH to develop its RSV F vaccine candidate (“RSV F Vaccine”) for maternal immunization in certain low-resource countries. The Company was awarded approximately $2.0 million by PATH for initial funding under the agreement to partially support its Phase 2 dose-ranging clinical trial in women of childbearing age. In October 2013, the funding under this agreement was increased by $0.4 million to support reproductive toxicology studies, which was necessary before the Company began conducting clinical trials in pregnant women. In December 2013, the Company entered into an amendment with PATH providing an additional $3.5 million in funding to support the Phase 2 dose-confirmation clinical trial in women of childbearing age. In October 2014, the Company entered into an amendment with PATH providing an additional $1.0 million towards the development of a strategy for conducting the planned Phase 3 clinical trials of the Company’s RSV maternal immunization program. The term of the PATH agreement expired in April 2015 and the Company retains global rights to commercialize the RSV product. The Company has submitted a funding proposal to the Bill & Melinda Gates Foundation (“BMGF”) for support of the Company’s continuing development of an affordable and accessible RSV vaccine for maternal immunization programs in low resource countries. The Company and BMGF are currently in ongoing discussions about such an arrangement, but there can be no assurances that it will be completed. The Company recognized revenue of $0.1 million and $0.5 million in the three and six ended June 30, 2015, and has recognized $6.8 million in revenue since the inception of the agreement. Revenue under this arrangement is being recognized under the proportional performance method and earned in proportion to the contract costs incurred in performance of the work as compared to total estimated contract costs. Costs incurred under this agreement represent a reasonable measurement of proportional performance of the services being performed.

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Stockholders' Equity

6 Months Ended

Jun. 30, 2015

Stockholders' Equity [Abstract]

Stockholders' Equity

Note 7 – Stockholders’ Equity

On June 18, 2015, the Company’s stockholders of record as of April 20, 2015 approved the amendment to the Company’s Amended and Restated Certificate of Incorporation (the “Charter Amendment”) to increase the total number of shares of common stock that the Company is authorized to issue from 300,000,000 shares to 600,000,000 shares.

In March 2015, the Company completed a public offering of 27,758,620 shares of its common stock, including 3,620,689 shares of common stock that were issued upon the exercise in full of the option to purchase additional shares granted to the underwriters, at a price of $7.25 per share resulting in proceeds, net of offering costs of $11.6 million, of approximately $190 million.

In 2012, the Company entered into an At Market Issuance Sales Agreement (“Sales Agreement”), under which the Board of Directors of the Company (the “Board”) approved the Company’s sale of up to an aggregate of $50 million in gross proceeds of its common stock. These shares of common stock were offered pursuant to a shelf registration statement filed with the SEC in March 2013, which replaced the previous shelf registration statement filed in 2010. The Board’s standing Finance Committee (the “Committee”) assisted with its responsibilities to monitor, provide advice to the Company’s senior management and approve all capital raising activities. In doing so, the Committee set the amount of shares to be sold, the period of time during which such sales may occur and the minimum sales price per share. During the six months ended June 30, 2015, the Company sold 0.8 million shares at an average sales price of $10.01 per share, resulting in approximately $8 million in net proceeds, of which $0.7 million was received in July 2015 upon settlement. In July 2015, the  Company sold the remaining $6.6 million of common stock (0.6 million shares at an average sales price of $11.53 per share) under the Sales Agreement. The Sales Agreement has thus been fully utilized.

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2015

Stock-Based Compensation [Abstract]

Stock-Based Compensation

Note 8 – Stock-Based Compensation

Stock Options

The Amended and Restated 2005 Stock Incentive Plan (“2005 Plan”) expired in February 2015 and no new awards may be made under such plan, although outstanding awards will continue in accordance with their terms. The Board adopted the 2015 Stock Incentive Plan (“2015 Plan”) in March 2015 and, consistent with historical practice, granted annual and new equity awards prior to the Company’s annual meeting of stockholders in June 2015 under the 2015 Plan; however, these awards were contingent upon stockholder approval of both the 2015 Plan and the Company’s Charter Amendment (See Note 7), both of which were approved at the Company’s annual meeting of stockholders in June 2015. Under the 2015 Plan, equity awards may be granted to officers, directors, employees and consultants of and advisors to the Company and any present or future subsidiary. The 2015 Plan authorizes the issuance of up to 25,000,000 shares of common stock under equity awards granted under the plan. All such shares authorized for issuance under the 2015 Plan have been reserved. The 2015 Plan will expire on March 4, 2025.

The 2015 Plan permits and the 2005 Plan permitted the grant of stock options (including incentive stock options), restricted stock, stock appreciation rights, and restricted stock units. In addition, under the 2015 Plan, unrestricted stock, stock units and performance awards may be granted. Stock options and stock appreciation rights generally have a maximum term of 10 years and may be or were granted with an exercise price that is no less than 100% of the fair market value of the Company’s common stock at the time of grant. Grants of stock options are generally subject to vesting over periods ranging from six months to four years.

Stock Options Awards

The following is a summary of option activity under the 2015 Plan, 2005 Plan and the 1995 Stock Option Plan (“1995 Plan”) for the six months ended June 30, 2015:

	2015 Plan				2005 Plan				1995 Plan
			Weighted-				Weighted-				Weighted-
			Average				Average				Average
	Stock		Exercise		Stock		Exercise		Stock		Exercise
	Options		Price		Options		Price		Options		Price
Outstanding at January 1, 2015		—	$	—		16,928,098	$	3.24		35,000	$	2.21
Granted		7,369,441	$	8.97		22,500	$	6.70		—	$	—
Exercised		—	$	—		(877,910)	$	2.24		(35,000)	$	2.21
Canceled		(55,500)	$	8.94		(153,375)	$	3.92		—	$	—
Outstanding at June 30, 2015		7,313,941	$	8.97		15,919,313	$	3.29		—	$	—
Shares exercisable at June 30, 2015		—	$	—		8,320,563	$	2.51		—	$	—
Shares available for grant at June 30, 2015		17,686,059

As discussed in the “Stock Options” section above, prior to the Company’s annual meeting of stockholders in June 2015, the Company granted 7,014,441 stock options with a weighted-average exercise price of $8.94 under the 2015 Plan. Since the 2015 Plan and the Charter Amendment were approved at the Company’s annual meeting of stockholders in June 2015, the Company began to record stock-based compensation expense for these awards at that time.

The fair value of stock options granted under the 2015 Plan and 2005 Plan was estimated at the date of grant or the date upon which the 2015 Plan was approved by the Company’s stockholders for stock options granted prior to that time using the Black-Scholes option-pricing model with the following assumptions:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2015	2014	2015	2014
Weighted-average Black- Scholes fair value of stock options granted	$4.42	$1.92	$4.42	$2.48
Risk-free interest rate	1.37%-2.13%	1.33%-1.39%	1.19%-2.13%	1.24%-2.22%
Dividend yield	0%	0%	0%	0%
Volatility	54.18%-68.39%	52.87%-53.81%	53.58%-68.39%	52.47%-67.93%
Expected term (in years)	3.98-7.34	4.10-4.26	3.98-7.34	4.04-6.96
Expected forfeiture rate	0%-16.33%	0%-23.15%	0%-16.33%	0%-23.15%

The total aggregate intrinsic value and weighted-average remaining contractual term of stock options outstanding under the 2015 Plan and 2005 Plan as of June 30, 2015 was approximately $140.8 million and 8.1 years, respectively. The total aggregate intrinsic value and weighted-average remaining contractual term of stock options exercisable under the 2015 Plan and 2005 Plan as of June 30, 2015 was approximately $71.8 million and 6.6 years, respectively. The aggregate intrinsic value represents the total intrinsic value (the difference between the Company’s closing stock price on the last trading day of the period and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on June 30, 2015. This amount is subject to change based on changes to the closing price of the Company’s common stock. The aggregate intrinsic value of options exercised for the six months ended June 30, 2015 and 2014 was $6.0 million and $1.7 million, respectively.

Employee Stock Purchase Plan

In April 2013, the Company adopted an Employee Stock Purchase Plan (the “ESPP”), which authorized an aggregate of 2,000,000 shares of common stock to be purchased, which will increase 5% on each anniversary of its adoption up to a maximum of 3,000,000 shares. The ESPP allows employees to purchase shares of common stock of the Company at each purchase date through payroll deductions of up to a maximum of 15% of their compensation, at 85% of the lesser of the market price of the shares at the time of purchase or the market price on the beginning date of an option period (or, if later, the date during the option period when the employee was first eligible to participate). At June 30, 2015, there were 1,413,388 shares available for issuance under the ESPP.

The ESPP is considered compensatory for financial reporting purposes. As such, the fair value of ESPP shares was estimated at the date of grant using the Black-Scholes option-pricing model with the following assumptions: 

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2015	2014	2015	2014
Range of Black-Scholes fair value of ESPP shares granted	$1.20-$2.24	$0.97-$1.79	$1.06-$2.24	$0.97-$1.79
Risk-free interest rate	0.07%-0.35%	0.11%-0.14%	0.05%-0.35%	0.11%-0.14%
Dividend yield	0%	0%	0%	0%
Volatility	40.79%-64.24%	53.80%-67.57%	40.79%-64.24%	53.80%-67.57%
Expected term (in years)	0.5-2.0	0.5-1.0	0.5-2.0	0.5-1.0
Expected forfeiture rate	5%	5%	5%	5%

Restricted Stock Awards

The following is a summary of restricted stock awards activity for the six months ended June 30, 2015:

			Per Share
			Weighted-
			Average
	Number of		Grant-Date
	Shares		Fair Value
Outstanding and Unvested at January 1, 2015		15,000	$	4.48
Restricted stock granted		—	$	—
Restricted stock vested		—	$	—
Restricted stock forfeited		—	$	—
Outstanding and Unvested at June 30, 2015		15,000	$	4.48

The Company recorded all stock-based compensation expense in the consolidated statements of operations as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2015		2014		2015		2014
Research and development	$	1,090	$	651	$	2,122	$	1,175
General and administrative		1,490		1,201		2,392		1,717
Total stock-based compensation expense	$	2,580	$	1,852	$	4,514	$	2,892

As of June 30, 2015, there was approximately $35.2 million of total unrecognized compensation expense (net of estimated forfeitures) related to unvested stock options, ESPP and restricted stock awards. This unrecognized non-cash compensation expense is expected to be recognized over a weighted-average period of 1.6 years, and will be allocated between research and development and general and administrative expenses accordingly. This estimate does not include the impact of other possible stock-based awards that may be made during future periods.

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Master Services Agreement with Cadila

6 Months Ended

Jun. 30, 2015

Master Services Agreement with Cadila [Abstract]

Master Services Agreement with Cadila

Note 10 – Master Services Agreement with Cadila

The Company and Cadila entered into a master services agreement pursuant to which the Company may request services from Cadila in the areas of biologics research, preclinical development, clinical development, process development, manufacturing scale-up and general manufacturing related services in India. In July 2011, and subsequently in March 2013, March 2014 and February 2015, the master services agreement was amended to extend the term by one year for which services can be provided by Cadila under this agreement. Under the revised terms, if, by March 31, 2016, the amount of services provided by Cadila is less than $7.5 million, the Company will pay Cadila the portion of the shortfall amount that is less than or equal to $2.0 million. Through June 30, 2015, the Company has purchased $6.7 million in services from Cadila pursuant to this agreement, which includes services provided, since the beginning of 2013, by CPLB to the Company on behalf of Cadila pursuant to an October 2013 amendment authorizing such CPLB services. During the six months ended June 30, 2015, the Company purchased $1.0 million in services from Cadila pursuant to this agreement, all of which were provided by CPLB on behalf of Cadila. As of June 30, 2015, the Company’s remaining obligation to Cadila under the master services agreement is $0.8 million. The Company has recognized as expense the entire amount of purchases to date related to CPLB as the Company has not recorded any equity income (loss) of CPLB (see Note 9).

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Stock-Based Compensation (Summary of Option Activity) (Details) - $ / shares	3 Months Ended	6 Months Ended
	Mar. 31, 2015	Jun. 30, 2015
2005 Plan [Member]
Stock Options
Outstanding at January 1, 2015	16,928,098	16,928,098
Granted		22,500
Exercised		(877,910)
Canceled		(153,375)
Outstanding at June 30, 2015		15,919,313
Shares exercisable at June 30, 2015		8,320,563
Weighted-Average Exercise Price
Outstanding at January 1, 2015	$ 3.24	$ 3.24
Granted		6.70
Exercised		2.24
Canceled		3.92
Outstanding at June 30, 2015		3.29
Shares exercisable at June 30, 2015		$ 2.51
1995 Plan [Member]
Stock Options
Outstanding at January 1, 2015	35,000	35,000
Granted		0
Exercised		(35,000)
Canceled		0
Outstanding at June 30, 2015		0
Shares exercisable at June 30, 2015		0
Weighted-Average Exercise Price
Outstanding at January 1, 2015	$ 2.21	$ 2.21
Granted		0
Exercised		2.21
Canceled		0
Outstanding at June 30, 2015		0
Shares exercisable at June 30, 2015		$ 0
2015 Plan [Member]
Stock Options
Outstanding at January 1, 2015	0	0
Granted	7,014,441	7,369,441
Exercised		0
Canceled		(55,500)
Outstanding at June 30, 2015		7,313,941
Shares exercisable at June 30, 2015		0
Shares available for grant at June 30, 2015		17,686,059
Weighted-Average Exercise Price
Outstanding at January 1, 2015	$ 0	$ 0
Granted	$ 8.94	8.97
Exercised		0
Canceled		8.94
Outstanding at June 30, 2015		8.97
Shares exercisable at June 30, 2015		$ 0

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Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2015

Investments [Abstract]

Investments Classified as Available-For-Sale

Marketable securities classified as available-for-sale as of June 30, 2015 and December 31, 2014 were comprised of (in thousands):

	June 30, 2015								December 31, 2014
			Gross		Gross						Gross		Gross
	Amortized		Unrealized		Unrealized				Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value		Cost		Gains		Losses		Fair Value
Asset-backed securities	$	48,381	$	1	$	(7)	$	48,375	$	46,660	$	—	$	(36)	$	46,624
Corporate debt securities		99,189		17		(27)		99,179		89,126		8		(37)		89,097
Total	$	147,570	$	18	$	(34)	$	147,554	$	135,786	$	8	$	(73)	$	135,721

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Fair Value Measurements (Fair value hierarchy for its financial assets and liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Level 1 [Member]
Assets
Total cash equivalents and marketable securities	$ 125,090	$ 20,354
Level 1 [Member] | Money market funds [Member]
Assets
Total cash equivalents and marketable securities	125,090	20,354
Level 1 [Member] | Government-backed security [Member]
Assets
Total cash equivalents and marketable securities	0	0
Level 1 [Member] | Asset-backed securities [Member]
Assets
Total cash equivalents and marketable securities	0	0
Level 1 [Member] | Corporate Debt Securities [Member]
Assets
Total cash equivalents and marketable securities	0	0
Level 2 [Member]
Assets
Total cash equivalents and marketable securities	176,645	143,221
Level 2 [Member] | Money market funds [Member]
Assets
Total cash equivalents and marketable securities	0	0
Level 2 [Member] | Government-backed security [Member]
Assets
Total cash equivalents and marketable securities	28,000	7,500
Level 2 [Member] | Asset-backed securities [Member]
Assets
Total cash equivalents and marketable securities	49,466	46,624
Level 2 [Member] | Corporate Debt Securities [Member]
Assets
Total cash equivalents and marketable securities	99,179	89,097
Level 3 [Member]
Assets
Total cash equivalents and marketable securities	0	0
Level 3 [Member] | Money market funds [Member]
Assets
Total cash equivalents and marketable securities	0	0
Level 3 [Member] | Government-backed security [Member]
Assets
Total cash equivalents and marketable securities	0	0
Level 3 [Member] | Asset-backed securities [Member]
Assets
Total cash equivalents and marketable securities	0	0
Level 3 [Member] | Corporate Debt Securities [Member]
Assets
Total cash equivalents and marketable securities	$ 0	$ 0

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License agreement with Wyeth Holding Corporation (Narrative) (Details) - Jun. 30, 2015 - License agreement - Wyeth - USD ($) $ in Millions	Total
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Notice period required for termination of license agreement	90 days
Aggregate amount of payments made under license agreement	$ 6.4
Expected milestone payment associated with the first Phase 3 clinical trial	$ 3.0

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net loss	$ (20,641)	$ (17,864)	$ (45,011)	$ (31,674)
Other comprehensive income (loss):
Net unrealized gains (losses) on investments available-for-sale	4	27	47	(1)
Reclassification adjustment for gains included in net loss	0	0	0	(615)
Foreign currency translation adjustment	1,042	(1,410)	(2,152)	(1,543)
Other comprehensive income (loss)	1,046	(1,383)	(2,105)	(2,159)
Comprehensive loss	$ (19,595)	$ (19,247)	$ (47,116)	$ (33,833)

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Fair Value Measurements

6 Months Ended

Jun. 30, 2015

Fair Value Measurements [Abstract]

Fair Value Measurements

Note 4 – Fair Value Measurements

The following table represents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis (in thousands):

	Fair Value at June 30, 2015						Fair Value at December 31, 2014
Assets	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Money market funds	$	125,090	$	—	$	—	$	20,354	$	—	$	—
Government-backed  security		—		28,000		—		—		7,500		—
Asset-backed securities		—		49,466		—		—		46,624		—
Corporate debt securities		—		99,179		—		—		89,097		—
Total cash equivalents and marketable securities	$	125,090	$	176,645	$	—	$	20,354	$	143,221	$	—

During the six months ended June 30, 2015, the Company did not have any transfers between levels.

The amounts in the Company’s consolidated balance sheet for accounts receivable – billed, accounts receivable – unbilled and accounts payable approximate fair value due to their short-term nature. Based on borrowing rates available to the Company, the fair value of capital lease and notes payable approximates their carrying value.

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Marketable Securities (Marketable securities classified as available-for-sale) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 147,570	$ 135,786
Gross Unrealized Gains	18	8
Gross Unrealized Losses	(34)	(73)
Fair Value	147,554	135,721
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	48,381	46,660
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(7)	(36)
Fair Value	48,375	46,624
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	99,189	89,126
Gross Unrealized Gains	17	8
Gross Unrealized Losses	(27)	(37)
Fair Value	$ 99,179	$ 89,097

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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2015	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of stock options exercised		$ 6.0	$ 1.7
Unrecognized compensation expense		$ 35.2
Unrecognized compensation expense, recognition period		1 year 7 months 6 days
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum term of options		10 years
Minimum grant price, percent of common stock fair value		100.00%
Aggregate intrinsic value of stock options outstanding		$ 140.8
Weighted-average remaining contractual term of stock options outstanding		8 years 1 month 6 days
Aggregate intrinsic value of stock options exercisable		$ 71.8
Weighted-average remaining contractual term of stock options exercisable		6 years 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		22,500
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price		$ 6.70
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance		1,413,388
Employee Stock Ownership Plan (ESOP), Plan Description		In April 2013, the Company adopted an Employee Stock Purchase Plan (the ESPP), which authorized an aggregate of 2,000,000 shares of common stock to be purchased, which will increase 5% on each anniversary of its adoption up to a maximum of 3,000,000 shares. The ESPP allows employees to purchase shares of common stock of the Company at each purchase date through payroll deductions of up to a maximum of 15% of their compensation, at 85% of the lesser of the market price of the shares at the time of purchase or the market price on the beginning date of an option period (or, if later, the date during the option period when the employee was first eligible to participate).
2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance		25,000,000
Aggregate intrinsic value of stock options outstanding		$ 140.8
Weighted-average remaining contractual term of stock options outstanding		8 years 1 month 6 days
Aggregate intrinsic value of stock options exercisable		$ 71.8
Weighted-average remaining contractual term of stock options exercisable		6 years 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	7,014,441	7,369,441
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 8.94	$ 8.97
2015 Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options Vesting Period		4 years
2015 Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options Vesting Period		6 months

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Measurements [Abstract]

Fair Value Hierarchy

The following table represents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis (in thousands):

	Fair Value at June 30, 2015						Fair Value at December 31, 2014
Assets	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Money market funds	$	125,090	$	—	$	—	$	20,354	$	—	$	—
Government-backed  security		—		28,000		—		—		7,500		—
Asset-backed securities		—		49,466		—		—		46,624		—
Corporate debt securities		—		99,179		—		—		89,097		—
Total cash equivalents and marketable securities	$	125,090	$	176,645	$	—	$	20,354	$	143,221	$	—