10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended December 31, 2019

OR

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

For the transition period from           to

Commission file number 001-38596

REPLIMUNE GROUP, INC.

(Exact name of registrant as specified in its charter)

Delaware	82-2082553
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

500 Unicorn Park

Woburn MA 01801

(Address of principal executive offices)

(Zip Code)

(781) 222-9600

(Registrant’s telephone number, including area code)

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.001 per share	REPL	The Nasdaq Stock Market LLC (Nasdaq Global Select Market)

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  o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).   Yes  x  No  o

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

Large accelerated filer o	Accelerated filer o
Non-accelerated filer x	Smaller reporting company o
	Emerging growth company x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. x

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

The number of shares of the registrant’s Common Stock, par value $0.001 per share, outstanding as of February 10, 2020 was 36,645,650

REPLIMUNE GROUP, INC.

FORM 10-Q

INDEX

		Page No.
PART I FINANCIAL INFORMATION		3
Item 1.	Condensed Consolidated Financial Statements (Unaudited)	3
	Condensed Consolidated Balance Sheets	3
	Condensed Consolidated Statements of Operations	4
	Condensed Consolidated Statements of Comprehensive Loss	5
	Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit)	6
	Condensed Consolidated Statements of Cash Flows	7
	Notes to Unaudited Condensed Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	39
Item 4.	Controls and Procedures	40
PART II OTHER INFORMATION		42
Item 1.	Legal Proceedings	42
Item 1A.	Risk Factors	42
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	80
Item 3.	Defaults Upon Senior Securities	80
Item 4.	Mine Safety Disclosure	80
Item 5.	Other Information	80
Item 6.	Exhibits	80
SIGNATURES		81

2

PART I -    FINANCIAL INFORMATION

Item 1. Financial Statements.

REPLIMUNE GROUP, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Amounts in thousands, except share and per share amounts)
(Unaudited)

	December 31,			March 31,
	2019			2019
Assets
Current assets:
Cash and cash equivalents	$	63,002		$	25,704
Short-term investments	117,877			109,107
Research and development incentives receivable	4,775			2,474
Prepaid expenses and other current assets	5,220			3,696
Total current assets	190,874			140,981
Property, plant and equipment, net	5,654			12,159
Restricted cash	1,636			1,186
Right-to-use asset - operating leases	4,731			—
Right-to-use asset - financing leases	47,528			—
Total assets	$	250,423		$	154,326
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	6,256		$	7,084
Accrued expenses and other current liabilities	4,557			2,801
Operating lease liabilities, current	1,011			—
Financing lease liabilities, current	2,393			—
Total current liabilities	14,217			9,885
Deferred rent, net of current portion	—			24
Financing obligation	—			6,561
Long term debt, net of debt discount	9,739			—
Operating lease liabilities, non-current	3,886			—
Financing lease liabilities, non-current	25,016			—
Total liabilities	52,858			16,470
Commitments and contingencies (Note 12)
Stockholders’ Equity:
Common stock, $0.001 par value; 150,000,000 shares authorized as of December 31, 2019 and March 31, 2019; 36,645,650 and 31,656,950 shares issued and outstanding as of December 31, 2019 and March 31, 2019	37			32
Additional paid-in capital	295,084			198,645
Accumulated deficit	(96,509		)	(59,766		)
Accumulated other comprehensive loss	(1,047		)	(1,055		)
Total stockholders’ equity	197,565			137,856
Total liabilities and stockholders’ equity	$	250,423		$	154,326

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

3

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Amounts in thousands, except share and per share amounts)
(Unaudited)

	Three Months Ended						Nine Months Ended
	December 31,						December 31,
	2019			2018			2019			2018
Operating expenses:
Research and development	$	11,948		$	7,857		$	27,573		$	16,760
General and administrative	4,716			2,280			12,240			6,360
Total operating expenses	16,664			10,137			39,813			23,120
Loss from operations	(16,664		)	(10,137		)	(39,813		)	(23,120		)
Other income (expense):
Research and development incentives	951			1,577			2,192			1,937
Investment income	550			882			1,804			1,775
Interest expense	(834		)	—			(1,029		)	—
Change in fair value of warrant liability	—			—			—			(5,452		)
Other income (expense)	(192		)	5			10			682
Total other income (expense), net	475			2,464			2,977			(1,058		)
Net loss attributable to common stockholders	$	(16,189	)	$	(7,673	)	$	(36,836	)	$	(24,178	)
Net loss per share attributable to common stockholders, basic and diluted	$	(0.46	)	$	(0.24	)	$	(1.13	)	$	(1.18	)
Weighted average common shares outstanding, basic and diluted	34,877,944			31,577,313			32,742,148			20,433,580

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

4

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(Amounts in thousands)
(Unaudited)

	Three Months Ended						Nine Months Ended
	December 31,						December 31,
	2019			2018			2019			2018
Net loss	$	(16,189	)	$	(7,673	)	$	(36,836	)	$	(24,178	)
Other comprehensive loss:
Foreign currency translation gain (loss)	408			(102		)	8			(1,088		)
Net unrealized loss on short-term investments, net of tax	(25		)	(55		)	—			(54		)
Comprehensive loss	$	(15,806	)	$	(7,830	)	$	(36,828	)	$	(25,320	)

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

5

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE

PREFERRED STOCK
AND STOCKHOLDERS’ EQUITY (DEFICIT)

(Amounts in thousands, except share amounts)
(Unaudited)

															Accumulated
	Convertible									Additional					other			Total
	preferred stock					Common stock				paid-in		Accumulated			comprehensive			stockholders’
	Shares		Amount			Shares		Amount		capital		deficit			loss			equity (deficit)
Balances as of March 31, 2019	—		$	—		31,656,950		$	32	$	198,645	$	(59,766	)	$	(1,055	)	$	137,856
Foreign currency translation adjustment	—		—			—		—		—		—			(182		)	(182		)
Unrealized gain on short-term investments	—		—			—		—		—		—			65			65
Exercise of stock options	—		—			6,751		—		18		—			—			18
Stock-based compensation expense	—		—			—		—		1,810		—			—			1,810
Impact of adoption of ASC 842	—		—			—		—		—		93			—			93
Net loss	—		—			—		—		—		(9,508		)	—			(9,508		)
Balances as of June 30, 2019	—		—			31,663,701		32		200,473		(69,181		)	(1,172		)	130,152
Foreign currency translation adjustment	—		—			—		—		—		—			(218		)	(218		)
Unrealized loss on short-term investments	—		—			—		—		—		—			(40		)	(40		)
Exercise of stock options	—		—			55,645		—		105		—			—			105
Stock-based compensation expense	—		—			—		—		1,781		—			—			1,781
Net loss	—		—			—		—		—		(11,139		)	—			(11,139		)
Balances as of September 30, 2019	—		—			31,719,346		32		202,359		(80,320		)	(1,430		)	120,641
Issuance of common stock through ATM sales, net of offering costs	—		—			287,559		—		4,431		—			—			4,431
Issuance of common shares upon closing of follow-on public offering, net of issuance costs and underwriter fees of $4,017	—		—			4,516,561		5		57,448		—			—			57,453
Issuance of prefunded warrants to purchase common stock, net of issuance costs and underwriter fees of $1,797						—		—		28,145		—			—			28,145
Foreign currency translation adjustment	—		—			—		—		—		—			408			408
Unrealized loss on short-term investments	—		—			—		—		—		—			(25		)	(25		)
Exercise of stock options	—		—			122,184		—		357		—			—			357
Stock-based compensation expense	—		—			—		—		2,344		—			—			2,344
Net loss	—		—			—		—		—		(16,189		)	—			(16,189		)
Balances as of December 31, 2019	—		$	—		36,645,650		$	37	$	295,084	$	(96,509	)	$	(1,047	)	$	197,565
Balances as of March 31, 2018	1,925,968		$	86,361		5,007,485		$	5	$	1,097	$	(28,932	)	$	(238	)	$	(28,068	)
Foreign currency translation adjustment	—		—			—		—		—		—			(847		)	(847		)
Unrealized gain on short-term investments	—		—			—		—		—		—			35			35
Stock-based compensation expense	—		—			—		—		225		—			—			225
Net loss	—		—			—		—		—		(10,044		)	—			(10,044		)
Balances as of June 30, 2018	1,925,968		86,361			5,007,485		5		1,322		(38,976		)	(1,050		)	(38,699		)
Conversion of convertible preferred stock into common stock upon closing of initial public offering	(1,925,968	)	(86,361		)	19,157,360		19		86,342		—			—			86,361
Conversion of convertible preferred stock warrants into common stock warrants	—		—			—		—		7,094		—			—			7,094
Repurchase of class A common stock upon closing of initial public offering	—		—			(26,258	)	—		—		—			—			—
Issuance of common stock upon closing of initial public offering, net of issuance costs and underwriter fees of $9,935	—		—			7,407,936		7		101,177		—			—			101,184
Foreign currency translation adjustment	—		—			—		—		—		—			(139		)	(139		)
Unrealized loss on short-term investments	—		—			—		—		—		—			(34		)	(34		)
Exercise of stock options	—		—			7,149		1		11					—			12
Stock-based compensation expense	—		—			—		—		718		—			—			718
Net loss	—		—			—		—		—		(6,461		)	—			(6,461		)
Balances as of September 30, 2018	—		—			31,553,672		32		196,664		(45,437		)	(1,223		)	150,036
Foreign currency translation adjustment	—		—			—		—		—		—			(102		)	(102		)
Unrealized loss on short-term investments	—		—			—		—		—		—			(55		)	(55		)
Exercise of stock options	—		—			87,000		—		153		—			—			153
Stock-based compensation expense	—		—			—		—		880		—			—			880
Net loss	—		—			—		—		—		(7,673		)	—			(7,673		)
Balances as of December 31, 2018	—		$	—		31,640,672		$	32	$	197,697	$	(53,110	)	$	(1,380	)	$	143,239

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

6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in thousands)
(Unaudited)

	Nine Months Ended
	December 31,
	2019			2018
Cash flows from operating activities:
Net loss	$	(36,836	)	$	(24,178	)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	5,935			1,823
Depreciation and amortization	191			106
Change in fair value of warrant liability	—			5,452
Net amortization of premiums and discounts on short-term investments	(899		)	(1,171		)
Noncash interest expense	94			40
Changes in operating assets and liabilities:
Research and development incentives receivable	(2,184		)	340
Prepaid expenses and other current assets	(1,520		)	(589		)
Operating lease, right-of-use-asset	421			—
Finance lease, right-of-use-asset	666			—
Long term prepaid rent	(14,051		)	—
Accounts payable	(2,585		)	(521		)
Accrued expenses and other current liabilities	1,781			(767		)
Operating lease liabilities	(303		)	—
Deferred rent	—			120
Net cash used in operating activities	(49,290		)	(19,345		)
Cash flows from investing activities:
Purchases of property, plant and equipment	(5,202		)	(752		)
Purchase of short-term investments	(119,611		)	(134,624		)
Proceeds from sales and maturities of short-term investments	111,739			58,958
Net cash provided by (used in) investing activities	(13,074		)	(76,418		)
Cash flows from financing activities:
Proceeds from issuance of common stock in follow-on public offering, net of underwriting fees and discounts	57,453			—
Proceeds from issuance of prefunded warrants to purchase common stock, net of underwriting fees and discounts	28,145			—
Proceeds from issuance of common stock through ATM sales	4,431			—
Proceeds from long-term debt	10,000			—
Payment of issuance costs	(355		)	(2,157		)
Exercise of stock options	480			165
Proceeds from issuance of common stock in initial public offering, net of underwriting fees and discounts	—			103,341
Principal payment of finance lease obligation	(22		)	—
Net cash provided by financing activities	100,132			101,349
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(20		)	(1,009		)
Net increase in cash, cash equivalents and restricted cash	37,748			4,577
Cash, cash equivalents and restricted cash at beginning of period	26,890			17,661
Cash, cash equivalents and restricted cash at end of period	$	64,638		$	22,238
Supplemental disclosure of cash flow information:
Cash paid for interest	$	282		$	—
Supplemental disclosure of non-cash investing and financing activities:
Conversion of convertible preferred stock warrants into common stock warrants	$	—		$	7,094
Conversion of convertible preferred stock into common stock	$	—		$	86,361
Purchases of property and equipment included in accounts payable	$	—		$	108
Lease assets obtained in exchange for new financing lease liabilities	$	48,224		$	—
Lease assets obtained in exchange for new operating lease liabilities	$	5,152		$	—
Amounts capitalized under the built-to-suit lease transaction	$	—		$	4,932

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

7

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Amounts in thousands, except share and per share amounts)
(Unaudited)

1.Nature of the business

Replimune Group, Inc. (the “Company”) is a clinical-stage biotechnology company focused on the development of oncolytic immunotherapies to treat cancer.

Replimune Limited (“Replimune UK”) was incorporated in 2015 under the laws of England, and was the sole shareholder of Replimune, Inc. (“Replimune US”), a Delaware corporation. On July 5, 2017, Replimune Group, Inc., a Delaware corporation, was incorporated and on July 10, 2017 the shareholders of Replimune UK effected a share-for-share exchange pursuant to which they exchanged their outstanding shares in Replimune UK for shares in Replimune Group, Inc., on a one-for-one basis. In addition, the holders of warrants and stock options to purchase Replimune UK capital stock canceled their warrants to purchase shares of series seed convertible preferred stock and stock options in Replimune UK and were issued replacement warrants to purchase shares of series seed convertible preferred stock and stock options to acquire Replimune Group, Inc. capital stock on a one-for-one basis. These transactions are collectively referred to as the reorganization. Upon completion of the reorganization, the historical consolidated  financial statements of Replimune UK became the historical consolidated financial statements of Replimune Group, Inc. because the reorganization was accounted for similar to a reorganization of entities under common control due to the high degree of common ownership of Replimune UK and Replimune Group, Inc. and lack of economic substance to the transaction. The Company concluded that the reorganization resulted in no change in the material rights and preferences of each respective class of equity interests and no change in the fair value of each respective class of equity interests before and after the reorganization. On December 8, 2017, Replimune UK transferred all outstanding shares of its wholly owned subsidiary, Replimune US to Replimune Group, Inc. Replimune Group. Inc., a Delaware corporation, is the sole shareholder of Replimune UK, Replimune US and Replimune Securities Corporation, a Massachusetts corporation that was incorporated in November 2017.

The Company is subject to risks and uncertainties common to early-stage companies in the biotechnology industry, including, but not limited to, development by competitors of new technological innovations, dependence on key personnel, protection of proprietary technology, compliance with government regulations and the ability to secure additional capital to fund operations. Product candidates currently under development will require significant additional research and development efforts, including preclinical and clinical testing and regulatory approval, prior to commercialization. These efforts require significant amounts of additional capital, adequate personnel and infrastructure and extensive compliance and reporting capabilities. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will realize significant revenue from product sales.

Forward stock split

On July 9, 2018, the Company effected a l -for-9.94688 forward stock split of its issued and outstanding shares of common stock and a proportional adjustment to the existing conversion ratios for each series of the Company’s Convertible Preferred Stock (see Note 8). Accordingly, all share and per share amounts for all periods presented in the accompanying consolidated financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect this forward stock split and adjustment of the convertible preferred stock conversion ratios. Further, on July 9, 2018, the Company’s authorized shares of common stock were increased to 27,314,288. Accordingly, the authorized shares of common stock presented in the accompanying consolidated financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect the newly authorized shares of common stock.

Initial public offering

On July 24, 2018, the Company completed an initial public offering (“IPO”) of its common stock and issued and sold 6,700,000 shares of common stock at a public offering price of $15.00 per share, resulting in net proceeds of $93,465 after deducting underwriting discounts and commissions but before deducting offering costs of $2,157.

8

Upon closing of the IPO, the Company’s outstanding convertible preferred stock automatically converted into shares of common stock (see Note 8). Upon conversion of the convertible preferred stock, the Company reclassified the carrying value of the convertible preferred stock to common stock and additional paid-in capital. The warrant to purchase shares of the Company’s series seed convertible preferred stock was converted into a warrant to purchase shares of the Company’s common stock upon the closing of the IPO. As a result, the warrant liability was remeasured a final time on the closing date of the IPO and reclassified to stockholders’ equity. Additionally, the Company repurchased 26,258 shares of class A common stock at a price equal to its par value upon the closing of the IPO.

On July 30, 2018, the Company issued and sold an additional 707,936 shares of its common stock at the IPO price of $15.00 per share pursuant to the underwriters’ partial exercise of their option to purchase additional shares of common stock, resulting in additional net proceeds of $9,876 after deducting discounts and commissions and other offering expenses.

Also, in connection with the completion of its IPO on July 24, 2018, the Company filed an amended and restated certificate of incorporation with the Secretary of State of the State of Delaware to authorize the issuance of up to 150,000,000 shares of common stock, par value $0.001 per share, and 10,000,000 shares of undesignated preferred stock, par value $0.001 per share.

Basis of presentation

The accompanying consolidated financial statements have been prepared on the basis of continuity of operations, realization  of assets and the satisfaction of liabilities and commitments in the ordinary course of business. The Company has incurred recurring losses since its inception, including net losses of $16,189 and $7,673 for the three months ended December 31, 2019 and 2018, respectively and net losses of $36,836 and $24,178 for the nine months ended December 31, 2019 and 2018, respectively. In addition, as of December 31, 2019, the Company had an accumulated deficit of $96,509. The Company expects to continue to generate operating losses for the foreseeable future. As of February 13, 2020, the issuance date of these consolidated financial statements, the Company expects that its cash and cash equivalents and short-term investments will be sufficient to fund its operating expenses and capital expenditure requirements through at least 12 months from the issuance of the condensed consolidated financial statements. The future viability of the Company beyond that point is dependent on its ability to raise additional capital to finance its operations.

If the Company is unable to obtain funding it could be forced to delay, reduce or eliminate some or all of its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects, or it may be unable to continue operations. Although management continues to pursue these plans, there is no assurance that the Company will be successful in obtaining sufficient funding on terms acceptable to the Company to fund continuing operations , if at all.

2.Summary of significant accounting policies

Principles of consolidation

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, and include the accounts of the Company and its wholly owned subsidiaries, Replimune UK, Replimune US and Replimune Securities Corporation, after elimination of all intercompany accounts and transactions. The consolidated financial statements reflect the capital as if Replimune Group, Inc. had been in existence for all periods presented.

Use of estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting periods. Significant estimates and assumptions reflected in these consolidated financial statements include, but are not limited to, the accrual for research and development expenses and the valuation of common stock and stock-based awards.

9

The Company bases its estimates on historical experience, known trends and other market-specific or other relevant factors that it believes to be reasonable under the circumstances . Estimates are periodically reviewed in light of reasonable changes in circumstances, facts and experience. Changes in estimates are recorded in the period in which they become known. Actual results could differ from those estimates or assumptions.

Unaudited interim financial information

The accompanying consolidated balance sheet as of December 31, 2019, the consolidated statements of operations, of comprehensive loss and of convertible preferred stock and stockholders’ equity for the three and nine months ended December 31, 2019 and 2018 and the consolidated statements of cash flows for the nine months ended December 31, 2019 and 2018 are unaudited. The unaudited interim consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of the Company’s financial position as of December 31, 2019 and the results of its operations for the three and nine months ended December 31, 2019 and 2018. The financial data and other information disclosed in these consolidated notes related to the three and nine months ended December 31, 2019 and 2018 are unaudited. The results for the three and nine months ended December 31, 2019 are not necessarily indicative of results to be expected for the year ending March 31, 2020, any other interim periods or any future year or period. The financial information included herein should be read in conjunction with the financial statements and notes in the Company’s Annual Report on Form 10-K for the year ended March 31, 2019.

During the three and nine months ended December 31, 2019, there have been no changes to the Company’s significant accounting policies as described in the Company’s Annual Report on Form 10-K for the year ended March 31, 2019, except as described below.

Debt Issuance Costs

Debt issuance costs consist of payments made to secure commitments under certain debt financing arrangements. These amounts are recognized as interest expense over the period of the financing arrangement using the effective interest method. If the financing arrangement is canceled or forfeited, or if the utility of the arrangement to the Company is otherwise compromised, these costs are recognized as interest expense immediately. The Company’s condensed consolidated financial statements present debt issuance costs related to a recognized debt liability as a direct reduction from the carrying amount of that debt liability.

Recently Adopted Accounting Pronouncements

In June 2018, the FASB issued Accounting Standards Updates (“ASU”) No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting (“ASU 2018-07”). ASU 2018-17 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. ASU 2018-17 also clarifies that Topic 718 does not apply to share-based payments used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Revenue from Contracts with Customers (Topic 606). The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is permitted. The Company adopted ASU 2018-17 on April 1, 2019. The adoption of ASU 2018- 17 did not have a material impact on the Company’s consolidated financial statements.

In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815) I. Accounting for Certain Financial Instruments with Down Round Features II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception (“ASU 2017-11”). Part I applies to entities that issue financial instruments such as warrants, convertible debt or convertible preferred stock that contain down-round features. Part II replaces the indefinite deferral for certain mandatorily redeemable noncontrolling interests and mandatorily redeemable financial instruments of nonpublic entities contained within Accounting Standards Codification (“ASC”) Topic 480 with a scope exception and does not impact the accounting for these mandatorily redeemable instruments. ASU 2017-11 is required to be adopted for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted ASU 2017-11 on April 1,

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2019. The adoption of ASU 2017-11 did not have a material impact on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02 (“ASU 2016-02”), Leases (Topic 842), which supersedes FASB Topic 840, Leases (Topic 840) and provides principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based  on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease, respectively. A lessee is also required  to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases. In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842) Land Easement Practical Expedient for Transition to Topic 842, which amends ASU 2016-02 to provide entities an optional transition practical expedient to not evaluate under Topic 842 existing or expired land easements that were not previously accounted for as leases under the current leases guidance in Topic 842. An entity that elects this practical expedient should evaluate new or modified land easements under Topic 842 beginning at the date that the entity adopts Topic 842. In July 2018, the FASB also issued ASU 2018-11, Leases (Topic 842): Targeted Improvements, which provides an optional transition method that allows entities to elect to apply the standard prospectively at its effective date, versus recasting the prior periods presented.

The Company adopted ASU 2016-02, as amended, on April 1, 2019, which supersedes the current leasing guidance and upon adoption, requires lessees to recognize right-of-use assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. Upon the adoption of the guidance, operating leases are capitalized on the balance sheet at the present value of lease payments. The balance sheet amount recorded for existing leases at the date of adoption of ASU 2016-02 was calculated using the applicable incremental borrowing rate at the date of adoption.

The Company adopted ASU 2016-02, including several practical expedients on April 1, 2019. The Company elected the available package of practical expedients, which allows the Company to not reassess previous accounting conclusions around whether arrangements are or contain leases, the classification of leases, and the treatment of initial direct costs. The Company also made an accounting policy election to utilize the short-term lease exemption, whereby leases with a term of 12 months or less will not follow  the recognition and measurement requirements of the new standard. Upon adoption, the Company recognized total right-of-use assets of $789, with corresponding liabilities of $837 on the consolidated balance sheets. Additionally, the Company derecognized $11,514 of construction in progress assets and $6,561 of financing obligations and recorded long term prepaid rent of $5,006 on the consolidated balance sheet (see Note 12).

The following table summarizes the financial impact on the Company’s condensed consolidated balance sheet upon the adoption of ASU 2016-02 and the cumulative effect adjustment on April 1, 2019:

	March 31, 2019			Adjustments			April 1, 2019
Property, plant, and equipment, net	$	12,159		$	(11,514	)	$	645
Right-to-use asset	$	—		$	789		$	789
Long term prepaid rent	$	—		$	5,006		$	5,006
Lease liabilities, current	$	—		$	388		$	388
Lease liabilities, non-current	$	—		$	449		$	449
Accrued expenses	$	2,801		$	(24	)	$	2,777
Deferred rent, net of current portion	$	24		$	(24	)	$	—
Financing obligation	$	6,561		$	(6,561	)	$	—
Accumulated deficit	$	(59,766	)	$	93		$	(59,673	)

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Recently Issued Accounting Pronouncements

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework- Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). The amendments in this ASU require certain existing disclosure requirements in Topic 820 to be modified or removed, and certain new disclosure requirements to be added to the Topic. In addition, this ASU allows entities to exercise more discretion when considering fair value measurement disclosures. ASU 2018-13 will be effective for the Company beginning April 1, 2020 with early adoption permitted. The Company is in the process of evaluating the impact of ASU 2018-13 on its consolidated financial statements and disclosures.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments- Credit Losses (Topic 326). The standard changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. Financial assets measured at amortized cost will be presented at the net amount expected to be collected by using an allowance for credit losses. In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments, which clarifies and corrects certain unintended applications of the guidance contained in each of the amended Topics. Additionally, in May 2019, the FASB issued ASU No. 2019-05, Financial Instruments - Credit Losses (Topic 326), which provides an option to irrevocably elect to measure certain individual financial assets at fair value instead of amortized cost. The standard is effective for fiscal years and interim periods beginning after December 15, 2019. Early adoption is permitted for all periods beginning after December 15, 2018. The Company is currently in the process of evaluating the impact the standard will have on its consolidated financial statements.

3.Fair value of financial assets and liabilities

The following tables present information about the Company’s financial assets and liabilities measured at fair value on a recurring basis:

	Fair Value Measurements as of
	December 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	—	$	35,853	$	—	$	35,853
Commercial paper	—		42,172		—		42,172
US Government Agency bonds	—		23,158		—		23,158
US Treasury bonds	—		28,105		—		28,105
Corporate debt securities	—		34,564		—		34,564
	$	—	$	163,852	$	—	$	163,852

	Fair Value Measurements as of
	March 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	—	$	2,676	$	—	$	2,676
Commercial paper	—		46,687		—		46,687
US Government Agency bonds	—		20,884		—		20,884
US Treasury bonds	—		41,057		—		41,057
Corporate debt securities	—		8,467		—		8,467
	$	—	$	119,771	$	—	$	119,771

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During the three and nine months ended December 31, 2019 and 2018, there were no transfers between levels.

Valuation of cash equivalents and short-term investments

Money market funds, commercial paper, US Government Agency bonds, US Treasury bonds and corporate debt securities were valued by the Company using quoted prices in active markets for similar securities, which represent a Level 2 measurement within the fair value hierarchy.

Valuation of Warrant Liability

The warrant liability is related to the warrants to purchase shares of series seed convertible preferred stock (see Note 8). The fair value of the warrant liability was determined based on significant inputs not observable in the market, which represents a Level 3 measurement within the fair value hierarchy. Upon the closing of the IPO in July 2018, the warrant to purchase shares of the Company’s series seed convertible preferred stock was converted into a warrant to purchase shares of the Company’s common stock. As a result, the warrant liability was remeasured a final time on the closing date of the IPO and reclassified to stockholders’ equity.

The Company used the Black-Scholes option-pricing model, which incorporated assumptions and estimates, to value the warrant liability. Key estimates and assumptions impacting the fair value measurement include: (i) the expected term of the warrants, (ii) the risk-free interest rate, (iii) the expected dividend yield, (iv) expected volatility of the price of the underlying series seed convertible preferred stock and (v) the fair value of the series seed convertible preferred stock on the valuation date. The Company estimated the fair value per share of the underlying series seed convertible preferred stock based, in part, on the results of third-party valuations and additional factors deemed relevant. The risk-free interest rate was determined by reference to the U.S. Treasury yield curve for time periods approximately equal to the remaining contractual term of the warrants. The Company estimated a 0% expected dividend yield based on the fact that the Company has never paid or declared dividends and does not intend to do so in the foreseeable future. Prior to July 2018, the Company was a private company and accordingly, lacked company-specific historical and implied volatility information of its stock, the expected stock volatility was based on the historical volatility of publicly traded peer companies for a term equal to the remaining expected term of the warrants.

Based on the terms and conditions of the warrant, upon closing of the Company’s IPO in July 2018, the warrant to purchase shares of the Company’s series seed convertible preferred stock was converted into a warrant to purchase shares of the Company’s common stock. On that date, the Company remeasured the warrant liability to fair value and reclassified the total carrying value to additional paid-in capital. The Company performed the final remeasurement of the warrant liability using the IPO price of $15.00 per share and recorded the change in fair value as a component of total other income (expense), net in the consolidated statement of operations.

The following assumptions were used to measure the fair market value of the warrant liability upon the conversion date:

	Nine Months
	Ended
	December 31,
	2018
Risk-free interest rate	2.81		%
Expected dividend yield	0		%
Expected term (in years)	7.2
Expected volatility	64.4		%
Fair value of series seed preferred stock	$	15.00

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The following table presents a roll forward of the warrant liability:

	Warrant
	Liability
Balance at March 31, 2018	$	1,642
Change in fair value	5,452
Conversion of convertible preferred stock warrant into common stock warrant	(7,094		)
Balance at December 31, 2018	$	—

4.Short-term investments

Short-term investments by investment type consisted of the following:

	December 31, 2019
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Commercial paper	$	42,148	$	24	$	—		$	42,172
US Government agency bonds	13,045		—		(9		)	13,036
US Treasury bonds	28,107		—		(2		)	28,105
Corporate debt securities	34,562		5		(3		)	34,564
	$	117,862	$	29	$	(14	)	$	117,877

	March 31, 2019
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Commercial paper	$	46,687	$	2	$	(2	)	$	46,687
US Government agency bonds	15,889		4		—			15,893
US Treasury bonds	38,047		13		—			38,060
Corporate debt securities	8,469		—		(2		)	8,467
	$	109,092	$	19	$	(4	)	$	109,107

5.Property, plant and equipment, net

	December 31,			March 31,
	2019			2019
Construction in progress	$	726		$	124
Plant and laboratory equipment	3,453			584
Leasehold improvements	368			154
Computer equipment	981			138
Office equipment	721			49
Build-to-suit lease asset	—			11,514
	6,249			12,563
Less: Accumulated depreciation and amortization	(595		)	(404		)
	$	5,654		$	12,159

Depreciation and amortization expense was $107 and $191 for the three and nine months ended December 31, 2019, respectively, and $37 and $106 for the three and nine months ended December 31, 2018, respectively.

Build-to-suit lease asset, as of March 31, 2019, included $11,514 capitalized in connection with the Company’s build-to-suit lease accounting. Upon transition to ASC 842, the Company determined that it did not control the build-to-suit lease asset and the arrangement has been accounted for under ASC 842 guidance. Upon the adoption of ASC 842, the Company derecognized $11,514 of construction in progress and $6,561 of financing obligations and recorded long term prepaid rent of $5,006 on the consolidated balance sheet (see Note 12).

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6.Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following:

	December 31,		March 31,
	2019		2019
Accrued research and development costs	$	1,416	$	530
Accrued compensation and benefits costs	2,099		1,510
Accrued professional fees	697		464
Deferred rent	—		24
Other	345		273
	$	4,557	$	2,801

7.Long-Term Debt

Long-term debt consisted of the following:

	December 31,
	2019
Principal amount of long-term debt	$	10,000
Unamortized debt discount	(261		)
Long-term debt, net of discount	$	9,739

Hercules Loan Agreement

On August 8, 2019, (the “Closing Date”) the Company and certain of its affiliates entered into a Loan and Security Agreement (the “Loan Agreement”) with Hercules Capital, Inc. (“Hercules”) pursuant to which Hercules agreed to make available to the Company a secured term loan facility in the amount of $30,000 (the “Term Loan Facility”), subject to certain terms and conditions. The Company borrowed $10,000 under the Loan Agreement in one advance as a single tranche Term Loan on the Closing Date upon which the Company paid a $225 facility charge and incurred $130 in additional closing and legal fees. The Company may borrow the unused $20,000 available under the Term Loan Facility in two separate advances. The second advance of up to $10,000 may be borrowed between January 1, 2020 and December 15, 2020 and the third advance of up to $10,000 may be borrowed between July 1, 2020 and June 30, 2021.

Advances under the Term Loan Facility bear interest at a rate per annum equal to the greater of either (i) the prime rate as reported in The Wall Street Journal plus 2.75%, or (ii) 8.75%. The Loan Agreement includes covenants, limitations, and events of default customary for similar facilities. The term of the Loan Agreement is four years, ending August 1, 2023.

Interest is payable on a monthly basis until March 1, 2022 (the “Amortization Date”). After the Amortization Date, payments shall consist of equal monthly installments of principal and interest payable until the secured obligations are repaid in full.

At any time the Company may prepay the principal of any advance pursuant to the terms of the Term Loan Facility subject to a prepayment charge equal to: 3.0%, if such advance is prepaid within the first twelve months following the Closing Date, 2.0%, if such advance is prepaid after twelve months but prior to twenty four months following the Closing Date, and 1.0%, if such advance is prepaid anytime thereafter. The Company will also pay a charge equal to the product of 4.95% and the aggregate amount of any advance made pursuant to the terms of the Term Loan Facility.

The Term Loan Facility is secured by substantially all of the Company’s assets, but excluding its intellectual property, and subject to certain exceptions and exclusions.

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The Loan Agreement contains customary covenants for transactions of this type and other covenants agreed to by the parties, including, among others, (i) the provision of delivery of annual and quarterly financial statements and insurance policies and restrictions on incurring debt, granting liens, making acquisitions, making loans, paying dividends, dissolving, and entering into leases and asset sales. The Loan Agreement also provides for customary events of default, including, among others, events of default relating to failure to make payment, bankruptcy, breach of covenants, breaches of representations and warranties, change of control, judgment and material adverse effects.

In connection with entering into the Hercules Loan Agreement the Company also paid Hercules $355 of upfront fees, including closing costs and legal fees associated with entering into the agreement, which were recorded as a debt discount. The debt discount is reflected as a reduction of the carrying value of long-term debt on the Company’s condensed consolidated balance sheet and is being amortized to interest expense over the term of the loan using the effective interest method.

The Company recognized aggregate interest expense under the Hercules Loan Agreement of $302 and $376 during the three and nine months ended December 31, 2019, which included non-cash interest expense of $81 and $94 related to the accretion of the debt discount and the final payment. As of December 31, 2019, the unamortized debt discount was $261. The Company’s annual effective interest rate of the Hercules Loan Agreement was approximately 10.1% for the period from August 8, 2019 to December 31, 2019.

There were no principal payments due or paid under the Hercules Loan Agreement during the three and nine months ended December 31, 2019.

Future payments of long-term debt, as of December 31, 2019 are as follows (fiscal years):

2021	$	—
2022	527
2023	6,558
2024	2,915
Total debt payments	$	10,000

The table of future payments of long-term debt excludes the end of term charge of $495 which is due upon the maturity of the loan.

8.Stockholders’ Equity

Common Stock

As of December 31, 2019 and March 31, 2019, the Company’s certificate of incorporation, as amended and restated, authorized the Company to issue up to 150,000,000 shares of common stock, par value $0.00l per share.

As of December 31, 2019 and March 31, 2019, the Company had reserved 10,472,126 and 6,873,744 shares of common stock for the exercise of outstanding stock options, the number of shares remaining available for grant under the Company’s 2018 Omnibus Incentive Compensation Plan and the Company’s Employee Stock Purchase Plan (see Note 9) and the exercise of the outstanding warrants to purchase shares of common, respectively.

Undesignated Preferred Stock

As of December 31, 2019 and March 31, 2019, the Company’s certificate of incorporation, as amended and restated, authorized the Company to issue up to 10,000,000 shares of undesignated preferred stock, par value $0.001 per share. There were no undesignated preferred shares issued or outstanding as of December 31, 2019 or March 31, 2019.

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Convertible Preferred Stock

The Company has issued series seed convertible preferred stock (the “series seed preferred stock”), series A convertible preferred stock (the “series A preferred stock”) and series B convertible preferred stock (the “series B preferred stock”). The series seed preferred stock, series A preferred stock and series B preferred stock are collectively referred to as the “preferred stock.” In connection with the closing of the IPO, the preferred stock converted into 19,157,360 shares of common stock on a 1:9.94688 basis. There was no preferred stock outstanding as of December 31, 2019.

Preferred Stock Warrants

In connection with the issuance of the series seed preferred stock, the Company issued to the holders of the series seed preferred stock warrants for the purchase of 50,000 shares of series seed preferred stock, which became fully vested and exercisable in the year of issuance. The warrants to purchase shares of series seed preferred stock were issued at an exercise price of $10.00 per share and expire on the earlier of September 16, 2025 or a qualified change of control event.

The issuance date fair value of the warrants to purchase shares of series seed preferred stock was $391 and was recorded as a liability with a corresponding reduction in the carrying value of the series seed preferred stock. The Company did not recognize any losses for the change in fair value of warrant liability within total other income (expense), net in the consolidated statements of operations for the three and nine months ended December 31, 2019, related to the change in fair value of the warrant liability.  The Company recognized a loss of $0 and $(5,452) in change in fair value of warrant liability within total other income (expense), net in the consolidated statements of operations for the three and nine months ended December 31, 2018, respectively, related to the change in fair value of the warrant liability.

Upon the closing of the Company’s IPO in July 2018, all outstanding convertible preferred stock was converted into common stock and the series seed preferred stock warrants became exercisable for 497,344 shares of common stock instead of series seed preferred stock. As a result, the warrant liability was remeasured a final time on the closing date of the IPO and reclassified to stockholders’ equity.

ATM Program

In August 2019, the Company entered into a Sales Agreement (the “Sales Agreement”) with SVB Leerink LLC (the “Agent”), pursuant to which the Company may sell, from time to time, at its option, up to an aggregate amount of $75,000 of shares of the Company’s common stock, $0.001 par value per share (the “Shares”) , through the Agent, as the Company’s sales agent.

Any Shares to be offered and sold under the Sales Agreement will be issued and sold (i) by methods deemed to be an “at the market offering” (“ATM”), as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended or in negotiated transactions, if authorized by the Company, and (ii) pursuant to, and only upon the effectiveness of, a registration statement on Form S- 3 filed by the Company with the Securities and Exchange Commission on August 8, 2019 for an offering of up to $250,000 of various securities, including shares of the Company’s common stock, preferred stock, debt securities, warrants and/or units for sale to the public in one or more public offerings.

Subject to the terms of the Sales Agreement, the Agent will use commercially reasonable efforts to sell the Shares from time  to time, based upon the Company’s  instructions (including any price, time or size limits or other customary parameters or conditions the Company may impose). The Company will pay the Agent a commission of 3.0% of the gross proceeds from the sale of the Shares, if any. During the nine months ended December 31, 2019, the Company has issued and sold 287,559 shares of common stock for gross proceeds of $4,568 less offering fees of $137 for net proceeds of $4,431 under the ATM program.

Equity offerings

In November 2019, the Company entered into an underwriting agreement (the “Underwriting Agreement”) with J.P. Morgan Securities LLC and SVB Leerink LLC, as representatives of the several underwriters named therein (the “Underwriters”), relating to the issuance and sale of an aggregate of (a) 3,678,031 shares of the Company’s common stock (the “Shares”), and (b) pre-funded warrants to purchase 2,200,000 shares of the Company’s common stock (the “Pre-Funded Warrants”) to the Underwriters (the “Offering”). The Shares were sold to the purchasers at the public offering price of $13.61 per share. The Pre-Funded Warrants were sold at a public offering price of $13.6099 per Pre-Funded Warrant, which represents the per share public offering price for the Company’s common stock less a $0.0001 per share exercise price for each such Pre-

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Funded Warrant. Pursuant to the Underwriting Agreement, the Company also granted the Underwriters a 30-day option to purchase up to 881,704 additional shares of its common stock. In December 2019, the Underwriters partially exercised their purchase option and the Company issued and sold an additional 838,530 shares of its common stock.  The Company received aggregate net proceeds of approximately $85,598 after deducting underwriting discounts, commissions and other offering expenses payable by the Company of approximately $5,814.

The Pre-Funded Warrants are exercisable at any time after the date of issuance. A holder of Pre-Funded Warrants may not exercise the warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of the Company’s common stock outstanding immediately after giving effect to such exercise. A holder of Pre-Funded Warrants may increase or decrease this percentage by providing at least 61 days’ prior notice to the Company.  As of December 31, 2019, none of the warrants had been exercised.

9.Stock-Based Compensation

2015 Enterprise Management Incentive Share Option Plan

The 2015 Enterprise Management Incentive Share Option Plan of Replimune UK (the “2015 Plan”) provided for Replimune UK to grant incentive stock options, non-statutory stock options, stock awards, stock units, stock appreciation rights and other stock- based awards. Incentive stock options are granted only to the Company’s employees, including officers and directors who are also employees. Non-statutory stock options are granted to employees, members of the board of directors, outside advisors and consultants of the Company.

2017 Equity Compensation Plan

In July 2017, in conjunction with the reorganization, the 2015 Plan was terminated, and all awards were cancelled with replacement awards issued under the 2017 Equity Compensation Plan (the “2017 Plan”). Subsequent to the reorganization, no additional grants will be made under the 2015 Plan and any outstanding awards under the 2015 Plan will continue with their original terms. The Company concluded that the cancellation of the 2015 Plan and issuance of replacement awards under the 2017 Plan was a modification with no change in the material rights and preferences and therefore no recorded change in the fair value of each respective award.

The Company’s 2017 Plan provides for the Company to grant incentive stock options or non-statutory stock options, stock awards, stock units, stock appreciation rights and other stock-based awards. Incentive stock options may be granted only to the Company’s employees, including officers and directors who are also employees. Restricted stock awards and non-statutory stock options may be granted to employees, officers, members of the board of directors , advisors and consultants of the Company. The maximum number of common shares that may be issued under the 2017 Plan was  2,659,885 as of December 31, 2019, of which 0 remained available for future grants as of December 31, 2019. Shares with respect to which awards have expired, terminated, surrendered or cancelled under the 2017 Plan without having been fully exercised will be available for future awards under the 2018 Plan. In addition, shares of common stock that are tendered to the Company by a participant to exercise an award are added to the number of shares of common stock available for the grant of awards.

2018 Omnibus Incentive Compensation Plan

On July 9, 2018, the Company’s board of directors adopted, and the Company’s stockholders approved, the 2018 Omnibus Incentive Compensation Plan (the “2018 Plan”), which became effective immediately prior to the effectiveness of the registration statement for the Company’s IPO. The 2018 Plan provides for the issuance of incentive stock options, non-qualified stock options, stock awards, stock units, stock appreciation rights and other stock-based awards. The number of shares initially reserved for issuance under the 2018 Plan is 3,617,968 shares, which is equal to the sum of (i) 3,486,118 shares of the Company’s common stock, plus (ii) the number of shares of the Company’s common stock reserved for issuance under the 2017 Plan that remain available as of the effective date of the 2018 Plan (not to exceed 131,850 shares of the Company’s common stock). If any options or stock appreciation rights, including outstanding options and stock appreciation rights granted under the 2017 Plan (up to 2,520,247 shares), terminate , expire, or are canceled, forfeited, exchanged, or surrendered without having been exercised, or if any stock awards, stock units or other

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stock-based awards, including outstanding awards granted under the 2017 Plan, are forfeited, terminated, or otherwise not paid in full in shares of common stock, the shares of the Company’s common stock subject to such grants will be available for purposes of our 2018 Plan. On April 1, 2019, the number of shares reserved for issuance under the 2018 Plan automatically increased by 1,266,370 shares pursuant to the terms of the 2018 Plan. As of December 31, 2019, 2,193,176 shares remained available for future grants under the 2018 Plan.

The 2015 Plan, the 2017 Plan and the 2018 Plan was administered by the board of directors or, at the discretion of the board of directors, by a committee of the board of directors. However, the board of directors shall administer and approve all grants made to non-employee directors. The exercise prices, vesting and other restrictions are determined at the discretion of the board of directors , except that the exercise price per share of incentive stock options may not be less than l 00% of the fair market value of the common stock on the date of grant (or 110% of fair value in the case of an award granted to employees who hold more than 10% of the total combined voting power of all classes of stock at the time of grant) and the term of stock options may not be greater than five years for an incentive stock option granted to a 10% stockholder and greater than ten years for all other options granted. Stock options awarded under both plans expire ten years after the grant date, unless the board of directors sets a shorter term. Vesting periods for both plans are determined at the discretion of the board of directors. Incentive stock options granted to employees and non-statutory options granted to employees, officers, members of the board of directors, advisors, and consultants of the Company typically vest over four years.

Employee Stock Purchase Plan

On July 9, 2018, the Company’s board of directors adopted and the Company’s stockholders approved the Employee Stock Purchase Plan (the “ESPP”), which became effective immediately prior to the effectiveness of the registration statement for the Company’s IPO. The total shares of common stock initially reserved for issuance under the ESPP is limited to 348,612 shares. In addition, as of the first trading day of each fiscal year during the term of the ESPP (excluding any extensions), an additional number of shares of the Company’s common stock equal to 1% of the total number of shares outstanding on the last trading day in the immediately preceding fiscal year or 697,224 shares, whichever is less (or such lesser amount as determined by the Company’s board of directors) will be added to the number of shares authorized under the ESPP. In accordance, on April 1, 2019, the number of shares reserved for issuance under the ESPP automatically increased by 316,592 shares, for a total of 665,204 shares reserved for the ESPP. If the total number of shares of common stock to be purchased pursuant to outstanding purchase rights on any particular date exceed the number of shares then available for issuance under the ESPP, then the plan administrator will allocate the available shares pro-rata and refund any excess payroll deductions or other contributions to participants.

Stock option valuation

The fair value of stock option grants is estimated using the Black-Scholes option-pricing model. The Company lacks company- specific historical and implied volatility information. Therefore, it estimated its expected stock volatility based on the historical volatility of a publicly traded set of peer companies. For options with service-based vesting conditions, the expected term of the Company’s stock options has been determined utilizing the “simplified” method for awards that qualify as “plain-vanilla” options.  The expected term of stock options granted to non-employees is equal to the contractual term of the option award. The risk-free interest rate is determined by reference to the U.S. Treasury yield curve in effect at the time of grant of the award for time periods approximately equal to the expected term of the award. Expected dividend yield is based on the fact that the Company has never paid cash dividends and does not expect to pay any cash dividends in the foreseeable future.

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The following table presents, on a weighted-average basis, the assumptions that the Company used to determine the grant-date fair value of stock options granted to employees and directors:

	Three Months Ended December 31,				Nine Months Ended December 31,
	2019		2018		2019		2018
Risk-free interest rate	1.68	%	2.83	%	2.17	%	2.83	%
Expected term (in years)	6.1		6.1		6.0		6.1
Expected volatility	69.7	%	63.3	%	71.0	%	61.7	%
Expected dividend yield	0	%	0	%	0	%	0	%

Stock options

The following table summarizes the Company’s stock option activity:

			Weighted		Weighted
			Average		Average	Aggregate
	Number of		Exercise		Contractual	Intrinsic
	Shares		Price		Term (Years)	Value
Outstanding as of March 31, 2019	3,721,784		$	7.14	8.61	$	30,150
Granted	1,515,535		15.00		9.41
Exercised	(184,580	)	2.60
Cancelled	(136,337	)	11.26
Outstanding as of December 31, 2019	4,916,402		$	9.46	8.20	$	26,959
Options exercisable as of March 31, 2019	1,278,930		$	2.51	7.75	$	16,249
Options exercisable as of December 31, 2019	1,924,564		$	5.33	7.40	$	17,650

The aggregate intrinsic value of stock options is calculated as the difference between the exercise price of the stock options and the fair value of the Company’s common stock for those stock options that had exercise prices lower than the fair value of the Company’s common stock.

The total fair value of options vested during the three and nine months ended December 31, 2019 was $1,063 and $4,480, respectively. The total fair value of options vested during the three and nine months ended December 31, 2018 was $211 and $1,042, respectively. As of December 31, 2019, there were no outstanding unvested service-based stock options held by non-employees.

Stock-Based Compensation

Stock-based compensation expense was classified in the consolidated statements of operations as follows:

	Three Months Ended December 31,				Nine Months Ended December 31,
	2019		2018		2019		2018
Research and development	$	1,318	$	473	$	2,974	$	989
General and administrative	1,026		407		2,961		834
	$	2,344	$	880	$	5,935	$	1,823

As of December 31, 2019, total unrecognized compensation cost related to the unvested stock-based awards was $18,483, which is expected to be recognized over a weighted average period of 2.70 years.

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10.Net loss per share

Basic and diluted net loss per share attributable to common stockholders was calculated as follows:

	Three Months Ended December 31,						Nine Months Ended December 31,
	2019			2018			2019			2018
Numerator:
Net loss attributable to common stockholders	$	(16,189	)	$	(7,673	)	$	(36,836	)	$	(24,178	)
Denominator:
Weighted average common shares outstanding, basic and diluted	34,877,944			31,577,313			32,742,148			20,433,580
Net loss per share attributable to common stockholders, basic and diluted	$	(0.46	)	$	(0.24	)	$	(1.13	)	$	(1.18	)

Included within weighted average common shares outstanding are common shares issuable upon the exercise of the pre-funded warrants as the warrants are exercisable at any time for nominal consideration, and as such, the shares are considered outstanding for the purpose of calculating basic and diluted net loss per share attributable to common stockholders.

The Company’s potentially dilutive securities, which include stock options and warrants to purchase shares of series seed preferred stock, have been excluded from the computation of diluted net loss per share as the effect would be to reduce the net loss per share. Common A stock has been excluded from the computation of diluted net loss per share because the shares have nominal economic participation rights. Therefore, the weighted average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same. The Company excluded the following potential common shares, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:

	Three and Nine Months Ended December 31,
	2019	2018
Options to purchase common stock	4,916,402	3,673,535
Warrants to purchase convertible preferred stock (as converted to common stock)	497,344	497,344
	5,413,746	4,170,879

11.Significant agreements

Agreement with Bristol-Myers Squibb Company

In February 2018, the Company entered into an agreement with Bristol-Myers Squibb Company (“BMS”). Pursuant to the agreement, BMS will provide to the Company, at no cost, nivolumab for use in the Company’s ongoing clinical trial of RP1 in combination with nivolumab. Under the agreement, the Company will sponsor, fund and conduct the clinical trial in accordance with an agreed-upon protocol. BMS granted the Company a non-exclusive, non-transferrable, royalty-free license (with a right to sublicense) under its intellectual property to its compound in the clinical trial and agreed to manufacture and supply its compound, at its cost and for no charge to the Company, for use in the clinical trial. In January 2020, this agreement was expanded to cover an additional cohort of 125 patients with anti-PD1 refractory melanoma.

Unless earlier terminated, the agreement will remain in effect until the latter of (i) the completion of the clinical trial, (ii) all related clinical trial data have been delivered to both parties and (iii) the completion of any statistical analyses and bioanalyses contemplated by the clinical trial protocol or any analysis otherwise agreed upon by the parties. The agreement may be terminated by either party (x) in the event of an uncured material breach by the other party, (y) in the event the other party is insolvent or in bankruptcy proceedings or (z) for safety reasons. Upon termination, the licenses granted to the Company to use BMS’s compound in the clinical trial will terminate.

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As of December 31, 2019, the Company had not incurred any costs and does not expect to incur future costs in connection with this agreement.

In April 2019, the Company entered into a separate agreement with BMS on terms similar to the terms set forth in the agreement described above, pursuant to which BMS will provide to the Company, at no cost, nivolumab for use in the Company’s Phase 1 clinical trial of RP2 in combination with nivolumab.

Agreement with Regeneron Pharmaceuticals, Inc.

In May 2018, the Company entered  into an agreement with Regeneron Pharmaceuticals, Inc. (“Regeneron”). The Company and Regeneron are each independently developing compounds for the treatment of certain tumor types. Pursuant to the agreement, the Company and Regeneron will undertake one or more clinical trials using a combination of the compounds being developed by each entity. Under the agreement, each study will be conducted under terms set out in a separately agreed upon study plan that will identify the name of the sponsor and which party will manage the particular clinical trial, and include the protocol, the budget and a schedule of clinical obligations. In June 2018, under the terms of the agreement between the Company and Regeneron, the parties agreed to the  first study plan. The Company and Regeneron have agreed to the protocol, budget, sample testing and clinical obligations schedule under the study plan. Development and supply costs associated with the study plan will be split equally between the Company and Regeneron.

Pursuant to the terms of the agreement, each party granted the other party a non-exclusive license under its respective intellectual property and agreed to contribute the necessary resources needed to fulfill its respective obligations, in each case, under the terms of the agreed-upon or to-be agreed upon study plans. Development costs of a particular clinical trial will be split equally between the Company and Regeneron.

The agreement may be terminated by either party if (i) there is no active study plan for which a final study report has not been completed, (ii) the parties have not entered into a study plan for an additional clinical trial within a period of time after the delivery of the most recent final study report or (iii) in the event of a material breach.

The Company will account for costs incurred as part of the study, including costs to supply compounds for use in the study, as research and development expenses within the consolidated statement of operations. The Company will recognize any amounts received from Regeneron in connection with this agreement as an offset to research and development expense within the consolidated statement of operations.

Under the terms of the agreement, on a quarterly basis the Company and Regeneron true-up costs of the study and make corresponding payments to the party that incurred the majority of the costs. During the three and nine months ended December 31, 2019 and 2018, the Company did not make any payments under the terms of the agreement to Regeneron. During the three and nine months ended December 31, 2019, the Company received payments under the terms of the agreement to Regeneron of $760 and $2,008, respectively, which were recorded as an offset to research and development expenses on the consolidated statement of operations. The Company did not receive any payments under the terms of the agreement to Regeneron during the three and nine months ended December 31, 2018. As of December 31, 2019 and March 31, 2019, the Company recorded $1,017 and $337 of receivables from Regeneron in connection with this agreement in prepaid expenses and other current assets in the consolidated balance sheet, respectively.

12.Commitments and contingencies

Leases

In December 2015, the Company entered into a lease agreement for office space in Woburn, Massachusetts, which expires on March 30, 2021. The Company has the option to extend the lease agreement for successive periods of five years. Monthly lease payments, inclusive of base rent and ancillary charges, total $7. Monthly base rent is subject to increase each year in proportion to the Consumer Price Index.

In April 2016, the Company entered into a lease agreement for office and laboratory space in Abingdon, England, which expires on April 3, 2026. The Company has the right to terminate the lease as of April 4, 2021 upon at least nine months’ prior written notice. Monthly lease payments are inclusive of base rent, ancillary charges, non-rent shared tenant occupancy costs and the respective value added tax to be paid. Monthly lease payments include base rent of approximately

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$23 through December 3, 2016 and $31 thereafter. Monthly base rent is subject to increase after April 2021 in proportion to the Retail Price Index.

In June 2018, the Company entered into an agreement to lease approximately 63,000 square feet of office, manufacturing and laboratory space within a previously occupied building with approximately 106,000 square feet of rentable space in Framingham, Massachusetts. Pursuant to the lease agreement, the lease term commenced in December 2018, subject to the landlord completing certain agreed upon landlord improvements. The rent commenced in August 2019. The initial lease term is ten years from the rent commencement date and includes two optional five-year extensions. Annual lease payments during the first year are $2,373 with increases of 3.0% each year.

Upon transition to ASC 842, the Company determined that it did not control the build-to-suit lease asset and the arrangement has been accounted for under ASC 842 guidance. Upon the adoption of ASC 842, the Company derecognized $11,514 of construction in progress and $6,561 of financing obligations and recorded long term prepaid rent of $5,006 on the consolidated balance sheet as landlord owned tenant improvements were determined to be lease payments and included as prepaid rent on the balance sheet.

Subsequent to the transition, construction was completed associated with approximately 10,500 square feet of the leased space in Framingham, Massachusetts and the Company occupied the building as office space beginning August 1, 2019. This space was determined to be a separate unit of account and is classified as a financing lease. The Company recorded a right-of-use asset and lease liability associated with the occupied space as of August 1, 2019. The right-of-use asset was recorded including $2,368 of prepaid rent of costs incurred prior to the commencement date. The Company occupied the remainder of the facility, approximately 53,000 square feet used as laboratory space, on October 22, 2019.  The Company recorded a right-of-use asset, which included prepaid rent costs of $18,425, and lease liability associated with the occupancy on October 22, 2019.

In June 2019, the Company entered into an agreement to lease approximately 18,700 square feet of office space in Woburn, Massachusetts. Pursuant to the lease agreement, the lease term commenced in August 2019. The rent commenced in September 2019. The initial lease term is ten years from the rent commencement date and includes an optional five-year extension. Annual lease payments during the first year are $488 with increases of approximately 1.6% each year. The Company recorded a right-of-use asset and a lease liability of $4,363 upon the commencement date of the lease and the lease is classified as an operating lease.

The Company determines if an arrangement is a lease at inception. Operating leases are included in our balance sheet as right-of-use assets -operating leases, current operating lease liabilities and long-term operating lease liabilities. Finance leases are included in the balance sheet as right-of-use asset — finance lease, finance lease liabilities, current, and finance lease liabilities, non-current. Certain of the Company’s lease agreements contain renewal options; however, the Company does not recognize right-of-use assets or lease liabilities for renewal periods unless it is determined that the Company is reasonably certain of renewing the lease at inception or when a triggering event occurs. As the Company’s leases do not provide an implicit rate, the Company estimated  the incremental borrowing rate in calculating the present value of the lease payments. Since the Company elected to account for each lease component and its associated non-lease components as a single combined lease component, all contract consideration was allocated to the combined lease component. Some of the Company’s lease agreements contain rent escalation clauses (including index-based escalations). The Company recognizes the minimum rental expense on a straight-line basis based on the fixed components of a lease arrangement. The Company amortizes this expense over the term of the lease beginning with the date of initial possession, which is the date the Company can enter the leased space and begin to make improvements in preparation for its intended use. Variable lease components represent amounts that are not fixed in nature and are not tied to an index or rate, and are recognized as incurred.

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	Three Months Ended  December 31, 2019		Nine Months Ended  December 31, 2019
Lease cost
Finance lease costs:
Amortization of right-of-use asset	$	607	$	666
Interest on lease liabilities	591		652
Operating lease costs	262		633
Total lease cost	$	1,460	$	1,951

Finance lease costs of $90 and $149 are recognized in general and administrative expenses for the three and nine months ended December 31, 2019 and $517 in research and development expenses for both the three and nine months ended December 31, 2019. The following table summarizes the maturity of the Company’s lease liabilities on an undiscounted cash flow basis and a reconciliation to the operating and financing lease liabilities recognized on our balance sheet as of December 31, 2019:

	December 31, 2019
	Operating lease		Financing lease		Total
2020 (remaining three months)	$	243	$	593	$	836
2021	1,034		2,411		3,445
2022	586		2,483		3,069
2023	596		2,558		3,154
2024	605		2,634		3,239
Thereafter	3,384		46,398		49,782
Total lease payments	6,448		57,077		63,525
Less: interest	1,551		29,668		31,219
Total lease liabilities	$	4,897	$	27,409	$	32,306

The following disclosure is provided for periods prior to adoption of ASU 2016-02. Future annual minimum lease payment commitments as of March 31, 2019 were as follows, which included payments for the lease agreement in Framingham, Massachusetts which has not commenced under ASC 842, and therefore has not been recorded on the Company’s condensed consolidated balance sheet as of December 31, 2019:

2020	$	2,062
2021	2,901
2022	2,493
2023	2,568
2024	2,645
2025	2,725
Thereafter	12,770
	$	28,164

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The following table provides lease disclosure as of and for the three months ended December 31, 2019:

	December 31, 2019
Leases
Right-to-use operating lease asset	$	4,731
Right-to-use finance lease asset	47,528
Total lease assets	$	52,259
Operating lease liabilities, current	$	1,011
Finance lease liabilities, current	2,393
Operating lease liabilities, non-current	3,886
Finance lease liabilities, non-current	25,016
Total lease liabilities	$	32,306
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	516
Operating cash flows from finance leases	$	623
Financing cash flows from finance leases	$	22
Right-to-use asset obtained in exchange for new operating lease liabilities	$	5,152
Right-to-use asset obtained in exchange for new financing lease liabilities	$	48,224
Variable lease costs	$	—
Short term lease costs	$	—
Weighted-average remaining lease term - operating leases	8.6 years
Weighted-average remaining lease term - financing leases	19.6 years
Weighted-average discount rate - operating leases	7		%
Weighted-average discount rate - financing leases	8		%

The variable lease costs and short-term lease costs were insignificant for the three and nine months ended December 31, 2019.

Manufacturing commitments

The Company has entered into an agreement with a contract manufacturing organization to provide clinical trial products. As of December 31, 2019 and March 31, 2019, the Company had committed to minimum payments under these arrangements totaling $5,113 and $4,694 through March 31, 2020, respectively.

Indemnification agreements

In the ordinary course of business, the Company may provide indemnification of varying scope and terms to vendors, lessors, business partners and other parties with respect to certain matters including, but not limited to, losses arising out of breach of such agreements or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with members of its board of directors that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is, in many cases, unlimited. To date, the Company has not incurred any material costs as a result of such indemnifications. The Company is not aware of any claims under indemnification arrangements, and therefore it has not accrued any liabilities related to such obligations in its consolidated financial statements as of December 31, 2019 or March 31, 2019.

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Legal Proceedings

The Company is not a party to any litigation and does not have contingency reserves established for any litigation liabilities.

13.Geographic Information

The Company operates in two geographic regions: the United States (Massachusetts) and the United Kingdom (Oxfordshire). Information about the Company’s long-lived assets held in different geographic regions is presented in the table below:

	December 31, 2019		March 31, 2019
United States	$	5,136	$	11,648
United Kingdom	518		511
	$	5,654	$	12,159

14.          Subsequent Events

Agreement with Bristol- Myers Squibb Company

In January 2020, the Company and BMS expanded the scope of the Clinical Trial Collaboration and Supply Agreement to provide that BMS will supply to the Company, at no cost, nivolumab for use in combination with RP1 in an additional cohort of 125 patients with anti-PD1 refractory melanoma.

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

You should read the following discussion and analysis of our financial condition and results of operations together with our unaudited consolidated financial statements and related notes appearing in Part I, Item 1 of this Quarterly Report on Form 10-Q and with our audited consolidated financial statements and notes thereto for the year ended March 31, 2019, included in our Annual Report on Form 10-K for the fiscal year ended March 31, 2019.

Some of the statements contained in this discussion and analysis or set forth elsewhere in this Quarterly Report on Form 10- Q, including information with respect to our plans and strategy for our business, constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. We have based these forward-looking statements on our current expectations and projections about future events. The following information and any forward-looking statements should be considered in light of factors discussed elsewhere in this Quarterly Report on Form 10-Q, particularly including those risks identified in Part II, Item 1A “Risk factors” and our other filings with the SEC.

Our actual results and timing of certain events may differ materially from the results discussed, projected, anticipated, or indicated in any forward-looking statements. We caution you that forward-looking statements are not guarantees of future performance and that our actual results of operations, financial condition and liquidity, and the development of the industry in which we operate may differ materially from the forward-looking statements contained in this Quarterly Report on Form 10-Q. Statements made herein are as of the date of the filing of this Form 10-Q with the SEC and should not be relied upon as of any subsequent date. Even if our results of operations, financial condition and liquidity, and the development of the industry in which we operate are consistent with the forward-looking statements contained in this Quarterly Report on Form 10-Q, they may not be predictive of results or developments in future periods. We disclaim any obligation, except as specifically required by law and the rules of the SEC, to publicly update or revise any such statements to reflect any change in our expectations or in events, conditions or circumstances on which any such statements may be based or that may affect the likelihood that actual results will differ from those set forth in the forward-looking statements.

Overview

We are a clinical-stage biotechnology company committed to applying our leading expertise in the field of oncolytic immunotherapy to transform the lives of cancer patients. We use our proprietary Immulytic platform to design and develop product candidates that are intended to maximally activate the immune system against cancer.

Oncolytic immunotherapy, which we intend to establish as the fourth cornerstone of cancer treatment, is an emerging class of cancer treatment that exploits the ability of certain viruses to selectively replicate in and directly kill tumors, as well as induce a potent, patient-specific, anti-tumor immune response. Such oncolytic, or “cancer killing,” viruses have the potential to generate an immune response targeted to an individual patient’s particular set of tumor antigens, including neo-antigens that are uniquely present in tumors. Our product candidates incorporate multiple mechanisms of action into a practical “off-the-shelf” approach that is intended to maximize the immune response against a patient’s cancer and to offer significant advantages over personalized vaccine approaches. We believe that the bundling of multiple approaches for the treatment of cancer into single therapies will simplify the development path of our product candidates, while also improving patient outcomes at a lower cost to the healthcare system than the use of multiple different drugs.

The foundation of our Immulytic platform consists of a proprietary, engineered strain of herpes simplex virus 1, or HSV-1, that has been “armed” with a fusogenic protein intended to substantially increase anti-tumor activity. Our platform enables us to incorporate various genes whose expression is intended to augment the inherent properties of HSV-1 to both directly destroy tumor cells and induce an anti-tumor immune response. We believe our lead product candidate, RP1, will be effective at killing tumors and inducing immunogenic, or immune-stimulating, tumor cell death and that it will be highly synergistic with immune checkpoint blockade therapies.

We are conducting a Phase 1/2 clinical trial with RP1, our lead product candidate, in approximately 150 patients. We have completed enrollment of the Phase 1 dose escalation part of this clinical trial in which we assessed the safety and tolerability of RP1 administered alone in 22 patients with mixed advanced solid tumor types. Following the review of the data by the Safety Review Committee, or SRC, we have determined the dose regimen to be administered in the Phase 2 part of this clinical trial. We have also completed enrollment of the Phase 1 expansion cohort of 14 patients in which we assessed the safety and tolerability of RP1 administered in combination with an anti-PD-1 therapy at the determined Phase 2 dose level. On November 8, 2019, we presented the safety and initial efficacy data from the Phase 1 portion of this clinical trial at The Society for Immunotherapy of Cancer, or SITC, including what we believe to be encouraging efficacy data in RP1’s lead indications of cutaneous squamous cell carcinoma, or CSCC, and melanoma.

The Phase 2 part of this clinical trial is designed to assess the safety and efficacy of RP1 in combination with an anti-PD-1 therapy in four cohorts of approximately 30 patients with melanoma, non-melanoma skin cancers, bladder cancer and MSI-H/dMMR tumors. Following SRC review of the Phase 1 data to date, including data from the expansion cohort receiving RP1 in combination with anti-PD-1 therapy, we have opened enrollment in all four cohorts, and completed enrollment in the melanoma cohort. In the Phase 2 part of the clinical trial, we are also evaluating efficacy as well as safety under the clinical trial protocol, primarily on the basis of the proportion of patients who respond within each tumor type cohort.  In January 2020 we announced our intention to open a further cohort of 125 patients with anti-PD1 refractory melanoma in this clinical trial, which we believe to be potentially registrationable (in its own right or, subject to discussion with regulatory authorities, following enrollment of additional patients). We believe that the initial clinical data in this patient group with RP1 combined with nivolumab as presented at SITC in November 2019 was encouraging and resulted in our decision to open this further cohort.  We expect to present data from the competed melanoma cohort (which includes uveal and mucosal melanoma patients

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in addition to cutaneous melanoma) and further data from the non-melanoma skin cancer cohort in mid-2020.  Further, we expect to present data from the initial patients recruited into the bladder and MSI-H/dMMR cohorts in the fourth quarter of 2020.

This Phase 1/2 clinical trial is being conducted as a collaboration with Bristol-Myers Squibb Company, or BMS, under which it has granted us a non-exclusive, royalty-free license to, and is supplying at no cost, its anti-PD-1 therapy, nivolumab, for use in combination with RP1 in this clinical trial.

We have also entered into a collaboration agreement with Regeneron Pharmaceuticals, Inc., or Regeneron, under which we intend to conduct clinical development of our product candidates in combination with cemiplimab, an anti-PD-1 therapy developed by Regeneron. For each clinical trial conducted under this collaboration, Regeneron will fund one-half of the clinical trial costs, supply cemiplimab at no cost, and grant us a non-exclusive, royalty-free license to cemiplimab for use in the applicable clinical trial. The first clinical trial under this collaboration is a randomized, controlled Phase 2 clinical trial of RP1 in combination with cemiplimab, versus cemiplimab alone, in approximately 240 patients in CSCC. This clinical trial is currently underway in the United States and Australia. We recently disclosed what we believe to be encouraging initial data in this indication from the Phase 1/2 clinical trial being conducted in combination with nivolumab. If compelling clinical data are generated demonstrating the benefits of the combined treatment in this clinical trial, we believe the data from this Phase 2 clinical trial could support a filing with regulatory authorities for marketing approval. Recruitment into this controlled Phase 2 clinical trial is expected to take approximately eighteen to twenty four months and we expect the primary readout from the clinical trial in 2022.

After assessing the initial data from the Phase 1/2 clinical trial which we presented at SITC, we recently announced our intention to initiate an additional Phase 1b clinical trial of single agent RP1 in solid organ transplant recipients with CSCC in the first quarter of 2020 which we believe to be potentially registrationable (in its own right or, subject to discussion with regulatory authorities, following enrollment of additional patients). We intend to enroll approximately 30 patients in this clinical trial to assess the safety and efficacy of RP1 in liver and kidney transplant recipients with recurrent CSCC. The protocol for this clinical trial has been accepted by the Federal Drug Administration, or FDA, and added to our Investigational New Drug application, or IND.

We are also developing additional product candidates, RP2 and RP3, built on our Immulytic platform, that are further engineered to enhance anti-tumor immune responses and intended to address additional tumor types. RP2 has been engineered to express an antibody-like molecule that blocks the activity of CTLA-4, a protein that inhibits the immune response to tumors. RP3 is engineered with the intent of not only blocking the activity of CTLA-4, but also to further stimulate an anti-tumor response through activation of the immune co-stimulatory pathways through expression of the ligands for CD40 and 4-1BB.

We initiated the Phase 1 clinical trial with RP2 in October 2019. The Phase 1 clinical trial of RP2 is also being conducted as a collaboration with BMS, under which BMS has granted us a non-exclusive, royalty-free license to, and will supply at no cost, nivolumab, for use in combination with RP2. We expect to release initial data from this Phase 1 clinical trial in the second half of 2020. We intend to file an IND and/or foreign equivalents for RP3 and, assuming regulatory clearance, enter clinical development during 2020. IND/foreign equivalent enabling studies are currently underway.

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Recent Developments

As announced at SITC, the Phase 1 part of our Phase 1/2 clinical trial of RP1 enrolled 36 patients with advanced heavily pre-treated cancers who were refractory to available therapy. Treatment with RP1 alone was given up to five times at various dose levels injected into a single tumor to determine the recommended Phase 2 dose (N=22), following which RP1 was given up to eight times at the recommended dose in combination with nivolumab starting with the second dose of RP1 (N=14). Based on the data, which we believe showed a favorable safety profile for both RP1 alone and in combination with nivolumab, the RP1 dosing regimen moved forward into Phase 2 development with an initial dose of up to 10mL of 1x106 pfu/ml followed by subsequent doses of up to 10mL of 1x107 pfu/ml.

In the dose rising monotherapy part of the Phase 1/2 clinical trial, as announced at SITC, RP1 was associated with tumor destruction, including delayed systemic post-study tumor reduction of uninjected tumors without further therapy. In the combination portion of the Phase 1 part of the clinical trial, evidence of anti-tumor activity was observed in multiple patients with a variety of tumor types, particularly in CSCC and melanoma, but also in microsatellite instability high (MSI-H) colorectal cancer and esophageal cancer patients. Additionally, the first three of four patients with anti-CTLA-4 and anti-PD-1 refractory cutaneous melanoma treated with RP1 combined with nivolumab, two from the Phase 1 part of the clinical trial and one from the Phase 2 part of the clinical trial, were observed to be responding to therapy, and clinical activity had been seen in four of the first five patients treated with CSCC. Of what we believe to be of particular note, substantial tumor reduction was observed in a number of patients after just the first dose of RP1, but before the introduction of nivolumab two weeks later, and multiple examples of responses of uninjected tumors were seen.

We also announced that biomarker data further confirmed the mechanism of action of RP1 alone and in combination with nivolumab, suggesting that RP1 provides broad anti-tumor immune activation. These biomarkers included assessment of the levels of CD8+T cells and PD-L1, increases of which were observed in serial tumor biopsies across tumor types. The kinetics of virus detection also suggested that robust virus replication in tumors occurs.

Further, we have completed the build-out of, and obtained an occupancy certificate with respect to, our approximately 63,000 square foot manufacturing facility in Framingham, Massachusetts and expect that the facility will be operational in the first half of 2020.

On January 8, 2020, our board of directors approved the appointment of Philip Astley-Sparke as our chief executive officer in place of Dr. Robert Coffin, who elected to transition from the role of chief executive officer to the role of President and Chief Research and Development Officer.

Financial overview

Since our inception, we have devoted substantially all of our resources to developing our lmmulytic platform and our lead product candidate, RP1, building our intellectual property portfolio, conducting research and development of our product candidates, business planning, raising capital and providing general and administrative support for our operations. To date, we have financed our operations primarily with proceeds from the sale of equity securities. We do not have any products approved for sale and have not generated any revenue from product sales. On July 24, 2018, we completed our initial public offering (IPO) of our common stock and issued and sold 6,700,000 shares of our common stock at a public offering price of $15.00 per share, resulting in net proceeds of approximately $93.5 million after deducting underwriting discounts and commissions but before deducting offering costs. On July 30, 2018, we issued and sold an additional 707,936 shares of our common stock at the IPO price of $15.00 per share pursuant to the underwriters’ partial exercise of their option to purchase additional shares of common stock, resulting in additional net proceeds of approximately $9.9 million after deducting discounts and commissions and other offering expenses.  On November 18, 2019, we completed a follow-on public stock offering of (i) 3,678,031 shares of our common stock at a public offering price of $13.61 per share and (ii) pre-funded warrants to purchase 2,200,000 shares of our common stock at a purchase price of $13.6099 per pre-funded warrant, the public offering price per share of common stock less the $0.0001 per share exercise price of each pre-funded warrant.  On December 13, 2019 we sold 838,530 shares of our common stock to the underwriters at the public offering price in connection with the underwriters’ partial exercise of their option to purchase additional shares of our common stock. We received aggregate net proceeds of approximately $85.6 million after deducting underwriting discounts, commissions and other offering expenses of approximately $5.8 million.

Since our inception, we have incurred significant operating losses. Our ability to generate product revenue sufficient to achieve profitability will depend on the successful development and eventual commercialization of one or more of our product candidates. Our net losses were $16.2 million and $7.7 million for the three months ended December 31, 2019 and 2018, respectively, and $36.8 million and $24.2 million for the nine months ended December 31, 2019 and 2018, respectively. As of December 31, 2019, we had an accumulated deficit of $96.5 million. These losses have resulted primarily from costs incurred in connection with research and development activities and general and administrative costs associated with our operations. We expect to continue to incur significant expenses and increasing operating losses for at least the next several years.

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We anticipate that our expenses and capital requirements will increase substantially in connection with our ongoing activities, particularly as we advance the preclinical activities and clinical trials of our product candidates. In addition, we expect to incur additional costs associated with continuing to operate as a public company. We expect that our expenses and capital requirements will increase substantially if and as we:

·conduct our current and future clinical trials with RP1;

·progress the preclinical and clinical development of RP2 and RP3;

·establish, equip, and operate our own in-house manufacturing facility;

·seek to identify and develop additional product candidates;

·seek marketing approvals for any of our product candidates that successfully complete clinical trials, if any;

·establish a sales, marketing and distribution infrastructure to commercialize any products for which we may obtain marketing approval;

·maintain, expand and protect our intellectual property portfolio;

·acquire or in-license other drugs and technologies;

·hire and retain additional clinical, quality control, scientific and finance personnel; and

·add operational, financial and management information systems and personnel, including personnel to support our research and development programs, any future commercialization efforts and as we continue to operate as a public company.

We will not generate revenue from product sales unless and until we successfully complete clinical development and obtain regulatory approval for RP1 or our other product candidates. If we obtain regulatory approval for any of our product candidates and do not enter into a commercialization partnership in any jurisdiction (which we currently do not intend to do in the United States) , we expect to incur significant expenses related to developing our internal commercialization capability to support product sales , marketing , and distribution.

As a result, we will need substantial additional funding to support our continuing operations and pursue our growth strategy.Until such time as we can generate significant revenue from product sales, if ever, we expect to finance our operations through a combination of equity offerings, debt financings, collaborations, strategic alliances, and marketing , distribution, or licensing arrangements. We may be unable to raise additional funds or enter into such other agreements or arrangements when needed on favorable terms, or at all. If we fail to raise capital or enter into such agreements as, and when, needed, we may have to significantly delay, scale back, or discontinue the development and commercialization of one or more of our product candidates. Because of the numerous risks and uncertainties associated with pharmaceutical product development, we are unable to accurately predict the timing or amount of increased expenses or when, or if, we will be able to achieve or maintain profitability. Even if we are able to generate product sales, we may not become profitable. If we fail to become profitable or are unable to sustain profitability on a continuing basis, then we may be unable to continue our operations at planned levels and be forced to reduce or terminate our operations.

As of December 31, 2019, we had cash and cash equivalents and short-term investments of $180.9 million. Based on our current operating plan, we believe that our existing cash and cash equivalents and short-term investments will enable us to fund our operating expenses and capital expenditure requirements into the second half of calendar year 2022.

See “- Liquidity and capital resources” and “Risk factors-Risks related to our financial position and need for additional

capital.”

Components of our results of operations

Revenue

To date, we have not generated any revenue from product sales as we do not have any approved products and do not expect to generate any revenue from the sale of products in the near future. If our development efforts for RP1 or any other product candidates that we may develop in the future are successful and result in regulatory approval, or if we enter into collaboration or license agreements with third parties, we may generate revenue in the future from a combination of product sales or payments from those collaboration or license agreements.

Operating expenses

Our expenses since inception have consisted solely of research and development costs and general and administrative costs.

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Research and development expenses

Research and development expenses consist primarily of costs incurred for our research activities, including our discovery efforts on the development of RP1 and our other product candidates, and include:

·expenses incurred under agreements with third parties, including CROs that conduct research, preclinical activities and clinical trials on our behalf as well as CMOs that manufacture our product candidates for use in our preclinical and clinical trials;

·salaries, benefits and other related costs, including stock-based compensation expense, for personnel engaged in research and development functions;

·costs of outside consultants, including their fees, stock-based compensation and related travel expenses;

·the costs of laboratory supplies and acquiring, developing and manufacturing preclinical study and clinical trial materials;

·costs related to compliance with regulatory requirements in connection with the development of RP1 and our other product candidates; and

·facility-related expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of facilities and other operating costs.

These costs will be partially offset by our agreement with Regeneron.

We expense research and development costs as incurred. We recognize external development costs based on an evaluation of the progress to completion of specific tasks using information provided to us by our service providers. Payments for these activities are based on the terms of the individual agreements, which may differ from the pattern of costs incurred, and are reflected  in our condensed consolidated financial statements as prepaid or accrued research and development expenses.

Our direct external research and development expenses are tracked on a program-by-program basis and consist of costs, such as fees paid to consultants, contractors, CMOs, and CROs in connection with our preclinical and clinical development activities. To date, we have not allocated expenses to our earlier-stage programs for RP2 and RP3. In addition, we do not allocate employee costs, costs associated with our discovery efforts, laboratory supplies, and facilities, including depreciation or other indirect costs, to specific product development programs because these costs are deployed across multiple product development programs and, as such, are not separately classified.

The table below summarizes our research and development expenses by product candidate or development program for each of the periods presented:

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2019		2018		2019		2018
	(Amounts in thousands)
RP1	$	4,276	$	4,026	$	10,660	$	7,633
Unallocated research and development expenses	7,672		3,831		16,913		9,127
Total research and development expenses	$	11,948	$	7,857	$	27,573	$	16,760

Research and development activities are central to our business model. Product candidates in later stages of clinical development generally have higher development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials. We expect that our research and development expenses will continue to increase for the foreseeable future as we initiate additional clinical trials of RP1, begin enrollment for clinical trials of RP2 and complete preclinical development and pursue initial stages of clinical development of RP3 and continue to discover and develop additional product candidates. The successful development and commercialization of our product candidates is highly uncertain. This is due to the numerous risks and uncertainties associated with product development and commercialization, including the following:

·the scope, rate of progress , expense and results of our ongoing clinical trials of RP1, as well as of any future clinical trials of RP2 and RP3 or other product candidates and other research and development activities that we may conduct;

·the number and scope of preclinical and clinical programs we decide to pursue;

·our ability to maintain our current research and development programs and to establish new ones;

·uncertainties in clinical trial design and patient enrollment rates;

·the successful completion of clinical trials with safety, tolerability, and efficacy profiles that are satisfactory to the FDA or any comparable foreign regulatory authority;

·the receipt of regulatory approvals from applicable regulatory authorities;

·our success in establishing, equipping, and operating a manufacturing facility, or securing manufacturing supply through relationships with third parties;

·our ability to obtain and maintain patents, trade secret protection, and regulatory exclusivity, both in the United States and internationally;

·our ability to protect our rights in our intellectual property portfolio;

·the commercialization of our product candidates, if and when approved;

·the acceptance of our product candidates, if approved, by patients, the medical community, and third-party payors;

·our ability to successfully develop our product candidates for use in combination with third-party products or product candidates;

·negative developments in the field of immuno-oncology;

·competition with other products; and

·significant and changing government regulation and regulatory guidance.

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A change in the outcome of any of these variables with respect to the development of a product candidate could mean a significant change in the costs and timing associated with the development of that product candidate. For example, if the FDA or another regulatory authority were to require us to conduct clinical trials beyond those that we anticipate will be required for the completion of clinical development of a product candidate, or if we experience significant trial delays due to patient enrollment or other reasons, we would be required to expend significant additional financial resources and time on the completion of clinical development. We may never succeed in obtaining regulatory approval for any of our product candidates.

General and administrative expenses

General and administrative expenses consist primarily of salaries and other related costs, including stock-based compensation, for personnel in our executive, finance, corporate and business development and administrative functions. General and administrative expenses also include professional fees for legal, patent, accounting, auditing, tax and consulting services; travel expenses; and facility- related expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of facilities and other operating costs.

We expect that our general and administrative expenses will increase in the future as we increase our general and administrative headcount to support our continued research and development and potential commercialization of our product candidates. We also expect to incur increased expenses associated with continuing to operate as a public company, including costs of accounting, audit, legal, regulatory and tax-related services associated with maintaining compliance with exchange listing and SEC requirements; director and officer insurance costs; and investor and public relations costs.

Other income (expense), net

Research and development incentives

Research and development incentives consists of reimbursements of research and development expenditures. We participate, through our subsidiary in the United Kingdom, in the research and development program provided by the United Kingdom tax relief program, such that a percentage of up to 14.5% of our qualifying research and development expenditures are reimbursed by the United Kingdom government, and such incentives are reflected as other income.

Change in fair value of warrant liability

In connection with the issuance of the series seed preferred stock, we issued to the series seed preferred stockholders warrants to purchase shares of series seed preferred stock. Prior to the completion of our IPO, we classified the warrants as a liability on our condensed consolidated balance sheets. We remeasured the warrant liability to fair value at each reporting date and recognized changes in the fair value of the warrant liability as a component of other income (expense), net in our condensed consolidated statements of operations.

Effective upon the completion of our IPO, the warrants to purchase shares of series seed preferred stock became exercisable for shares of common stock instead of shares of preferred stock, and the warrant liability was reclassified to additional paid-in capital. As a result, effective upon the completion of our IPO, we no longer recognize changes in the fair value of the warrant liability as other income (expense), net in our condensed consolidated statements of operations.

Investment income

Investment income consists of income earned on our cash and cash equivalents and short-term investments.

Interest expense

Interest expense primarily consists of amortization of finance charges under our financing lease and the amortization of debt discount and cash paid for interest under the Term Loan Facility.

Other income (expense), net

Other income (expense), net consists primarily of realized and unrealized foreign currency transaction gains and losses.

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Income taxes

Since our inception and through December 31, 2019, we have not recorded any income tax benefits for the net losses we incurred in each jurisdiction in which we operate, as we believe, based upon the weight of available evidence, that it is more likely than not that all of our net operating loss carryforwards will not be realized.

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act, or the Tax Act. The Tax Act includes a number of changes to existing tax law, including, among other things, a permanent reduction in the federal corporate income tax rate from a top marginal rate of 35% to a flat rate of 21%, effective as of January 1, 2018, as well as limitation of the deduction for net operating losses to 80% of annual taxable income and elimination of net operating loss carrybacks, in each case, for losses arising in taxable years beginning after December 31, 2017 (though any such net operating losses may be carried forward indefinitely). Under the Tax Act, our deferred tax assets and liabilities (before valuation allowance) were remeasured at the lower federal tax rate, resulting in an increase to our income tax provision with an equal and offsetting reduction in our valuation allowance. We completed our final determination of the remeasurement of our deferred tax assets and liabilities for the year ended March 31, 2019 under SEC Staff Accounting Bulletin No. 118 and we have not recorded any adjustments to the provisional amounts recorded at March 31, 2018.

Results of operations

Comparison of the three months ended December 31, 2019 and 2018

The following table summarizes our results of operations for the three months ended December 31, 2019 and 2018:

	Three Months Ended
	December 31,
	2019			2018			Change
	(Amounts in thousands)
Operating expenses:
Research and development	$	11,948		$	7,857		$	4,091
General and administrative	4,716			2,280			2,436
Total operating expenses	16,664			10,137			6,527
Loss from operations	(16,664		)	(10,137		)	(6,527		)
Other income (expense):
Research and development incentives	951			1,577			(626		)
Investment income	550			882			(332		)
Interest expense	(834		)	—			(834		)
Other income (expense)	(192		)	5			(197		)
Total other income (expense), net	475			2,464			(1,989		)
Net loss	$	(16,189	)	$	(7,673	)	$	(8,516	)

Research and development expenses

	Three Months Ended
	December 31,
	2019		2018		Change
	(Amounts in thousands)
Direct research and development expenses by program:
RP1	$	4,276	$	4,026	$	250
Unallocated research and development expenses:
Personnel related (including stock-based compensation)	4,395		1,932		2,463
Other	3,277		1,899		1,378
Total research and development expenses	$	11,948	$	7,857	$	4,091

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Research and development expenses for the three months ended December 31, 2019 were $11.9 million, compared to $7.9 million for the three months ended December 31, 2019. The increase of $4.0 million was due primarily to an increase of approximately $0.2 million in direct research costs associated with RP1 and an approximately $3.8 million increase in our unallocated research and development costs. The increase in RPl costs was due primarily to an increase in clinical trial costs in the three months ended December 31, 2019 associated with our ongoing Phase 1/2 clinical trial.

The increase in unallocated research and development expenses reflected an increase of $2.5 million in personnel-related costs, including stock-based compensation, and an increase of $1.3 million in other costs. The increase in personnel-related costs was primarily due to the hiring of additional personnel in our research and development functions as we began work on our planned Phase 2 clinical trial of RP1 in patients with CSCC Personnel-related costs for the three months ended December 31, 2019 and 2018 included stock-based compensation expense of $1.3 million and $0.5 million, respectively. Included within the stock compensation expense for the three months ended December 31, 2019 was $0.5 million for the modification of certain stock options related to the departure of an executive. Other costs increased primarily due to purchases of supplies used across all of our product candidates.

General and administrative expenses

General and administrative expenses were $4.7 million for the three months ended December 31, 2019, compared to $2.3 million for the three months ended December 31, 2018. The increase of $2.4 million primarily reflected increases of $1.2 million in personnel related costs, $0.4 million in professional fees, $0.6 million in facility costs and $0.2 million in other costs. The increase in personnel related costs was due to the hiring of additional personnel in our general and administrative functions as we expanded our operations in the United States.  Personnel-related costs for the three months ended December 31, 2019 and 2018 included stock-based compensation expense of $1.0 million and $0.4 million, respectively.

Other income (expense), net

Other income, net was $0.5 million for the three months ended December 31, 2019, compared to other income, net of $2.5 million for the three months ended December 31, 2018. The decrease in other income, net of $2.0 million was primarily attributable to a $0.8 million increase in interest expense including $0.5 million related to amortization of finance charges under our financing lease and $0.3 million related to our Term Loan Facility, a $0.6 million decrease in research and development incentives due to changes in the location of research and development services being performed, a $0.3 million decrease in investment income due to changes in the short-term investment balances as well as the rate of return on the associated investment, and a $0.2 million increase in other expense, net due primarily to changes in foreign currency exchange rates of Great British Pounds to United States Dollars.

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Comparison of the nine months ended December 31, 2019 and 2018

The following table summarizes our results of operations for the nine months ended December 31, 2019 and 2018:

	Nine Months Ended
	December 31,
	2019			2018			Change
	(Amounts in thousands)
Operating expenses:
Research and development	$	27,573		$	16,760		$	10,813
General and administrative	12,240			6,360			5,880
Total operating expenses	39,813			23,120			16,693
Loss from operations	(39,813		)	(23,120		)	(16,693		)
Other income (expense):
Research and development incentives	2,192			1,937			255
Investment income	1,803			1,775			28
Interest expense	(1,028		)	—			(1,028		)
Change in fair value of warrant liability	—			(5,452		)	5,452
Other income	10			682			(672		)
Total other income (expense), net	2,977			(1,058		)	4,035
Net loss	$	(36,836	)	$	(24,178	)	$	(12,658	)

Research and development expenses

	Nine Months Ended
	December 31,
	2019		2018		Change
	(Amounts in thousands)
Direct research and development expenses by program:
RP1	$	10,660	$	7,633	$	3,027
Unallocated research and development expenses:
Personnel related (including stock-based compensation)	10,776		5,019		5,757
Other	6,137		4,108		2,029
Total research and development expenses	$	27,573	$	16,760	$	10,813

Research and development expenses for the nine months ended December 31, 2019 were $27.6 million, compared to $16.8 million for the nine months ended December 31, 2018. The increase of $10.8 million was due primarily to an increase of approximately $3.0 million in direct research costs associated with RP1 and an approximately $7.8 million increase in our unallocated research and development costs. The increase in RP1 costs was due primarily to an increase in clinical trial costs in the three months ended December 31, 2019 associated with our ongoing Phase 1/2 clinical trial.

The increase in unallocated research and development expenses reflected an increase of $5.8 million in personnel-related costs, including stock-based compensation, and an increase of $2.0 million in other costs. The increase in personnel-related costs was primarily due to the hiring of additional personnel in our research and development functions as we began work on our planned Phase 2 clinical trial of RPl in patients with CSCC. Personnel-related costs for the nine months ended December 31, 2019 and 2018 included stock-based compensation expense of $3.0 million and $1.0 million, respectively.  Included within the stock compensation expense for the nine months ended December 31, 2019 was $0.5 million for the modification of certain stock options related to the departure of  an executive. Other costs increased primarily due to purchases of supplies used across all of our product candidates.

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General and administrative expenses

General and administrative expenses were $12.2 million for the nine months ended December 31, 2019, compared to $6.4 million for the nine months ended December 31, 2018. The increase of $5.8 million primarily reflected increases of $3.5 million in personnel related costs, $1.2 million in facility costs, $0.6 million in other costs and $0.5 million in professional fees. The increase in personnel related costs was due to the hiring of additional personnel in our general and administrative functions as we expanded our operations in the United States.  Personnel-related costs for the nine months ended December 31, 2019 and 2018 included stock-based compensation expense of $3.0 million and $0.8 million, respectively.

Other income (expense), net

Other income, net was $3.0 million for the nine months ended December 31, 2019, compared to other expense, net of $(1.1) million for the nine months ended December 31, 2018. The increase in other income, net of $4.1 million was primarily attributable to a $5.5 million charge related to the change in the fair value of the warrant liability in 2018 that did not recur in 2019 and a $0.3 million increase in research and development incentives, partially offset by a $1.0 million increase in interest expense including $0.6 million related to amortization of finance charges under our financing lease and $0.4 million related to our Term Loan Facility and a $0.7 million decrease in other income due primarily to changes in foreign currency exchange rates of Great British Pounds to United States Dollars.

Liquidity and capital resources

Since our inception, we have not generated any revenue from product sales and have incurred significant operating losses and negative cash flows from our operations. We have not yet commercialized any of our product candidates, which are in various phases of preclinical and clinical development, and we do not expect to generate revenue from sales of any products for the foreseeable future, if at all.

Sources of liquidity

To date, we have financed our operations primarily with proceeds from the sale equity securities. Through December 31, 2019, we had received gross proceeds of approximately $304.0 million from our sales of common stock, preferred stock and our Term Loan Facility. As of December 31, 2019, we had cash and cash equivalents and short-term investments of $180.9 million.

On July 24, 2018, we completed our IPO and issued and sold 6,700,000 shares of our common stock at a public offering price of $15.00 per share, resulting in net proceeds of $93.5 million after deducting underwriting discounts and commissions but before deducting offering costs. On July 30, 2018, we issued and sold an additional 707,936 shares of our common stock at the IPO price of $15.00 per share pursuant to the underwriters’ partial exercise of their option to purchase additional shares of our common stock, resulting in additional net proceeds of $9.9 million after deducting discounts and commissions and other offering expenses.  On November 18, 2019, we closed a follow-on public offering of (i) 3,678,031 shares of its common stock at a public offering price of $13.61 per share and (ii) pre-funded warrants to purchase 2,200,000 shares of our common stock at a purchase price of $13.6099 per pre-funded warrant, the public offering price per share of the common stock less the $0.0001 per share exercise price of each pre-funded warrant.  On December 13, 2019 we sold 838,530 shares of our common stock at the public offering price in connection with the underwriters’ partial exercise of option to purchase additional shares of our common stock. We received aggregate net proceeds of approximately $85.6 million after deducting underwriting discounts, commissions and other offering expenses of approximately $5.8 million.

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Cash flows

The following table summarizes our cash flows for each of the periods presented:

	Nine Months Ended
	December 31,
	2019			2018
	(Amounts in thousands)
Net cash used in operating activities	$	(49,290	)	$	(19,345	)
Net cash used in investing activities	(13,074		)	(76,418		)
Net cash provided by financing activities	100,132			101,349
Effect of exchange rate changes on cash and cash equivalents	(20		)	(1,009		)
Net increase in cash and cash equivalents	$	37,748		$	4,577

Operating activities

During the nine months ended December 31, 2019, net cash used in operating activities was $49.3 million, primarily resulting from our net loss of $36.8 million and net cash used by changes in our operating assets and liabilities of $17.8 million, partially offset by net non- cash charges of $5.3 million. Net cash used by changes in our operating assets and liabilities for the nine months ended December 31, 2019 consisted primarily of a $14.1 million increase in long-term prepaid rent,  a $2.6 million decrease in accounts payable, a $2.2 million increase in research and development incentives receivable, partially from the United Kingdom government due to the timing and amount of our qualifying expenditures, a $1.5 million increase in prepaid expenses and other current assets and  a $0.3 million decrease in operating lease liabilities offset by a $1.8 million increase in accrued expenses and other current liabilities, $0.7 million decrease in operating lease, right-of-use asset and $0.4 million decrease in financing lease, right-of-use-asset.

During the nine months ended December 31, 2018, net cash used in operating activities was $19.3 million, primarily resulting from our net loss of $24.2 million, net cash used in changes in our operating assets and liabilities of $1.3 million, partially offset by net non-cash charges of $6.2 million. Net cash used in changes in our operating assets and liabilities for the nine months ended December 31, 2018 consisted primarily of a $0.6 million increase in prepaid expenses and other current assets, a $0.5 million decrease in accounts payable and a $0.8 million decrease in accrued expenses and other current liabilities, partially offset by a $0.3 million decrease in the research and development incentives receivable from the United Kingdom government due to the timing and amount of our qualifying expenditures and a $0.1 million increase in deferred rent .

Investing activities

During the nine months ended December 31, 2019, net cash used in investing activities was $13.1 million, consisting of $119.6 million in purchases of available for sale securities and $5.2 million in purchases of property, plant and equipment , partially offset by $111.7 million in proceeds from sales and maturities of short-term investments.

During the nine months ended December 31, 2018, net cash used in investing activities was $76.5 million, consisting of $134.6 million in purchases of available for sale securities and $0.9 million in purchases of property, plant and equipment partially offset by $59.0 million in proceeds from maturities of short-term investments.

We expect that purchases of property, plant and equipment will increase over the next several years resulting from our intended establishment of our own in-house manufacturing facility.

Financing activities

During the nine months ended December 31, 2019, net cash provided by financing activities was $100.1 million, consisting of $57.5 million in proceeds from the issuance of common stock in follow-on public offering, $28.1 million in proceeds from issuance of pre-funded warrants to purchase common stock, $10.0 million in proceeds from the long-term debt, $4.4 million in proceeds from the issuance of common stock through ATM sales and $0.5 million in proceeds from the exercise of stock options, partially offset by $0.4 million in payments of issuance costs and $22,000 in principal payments of finance lease obligations.

During the nine months ended December 31, 2018, net cash provided by financing activities was $101.3 million, consisting of $103.3 million in proceeds from the issuance of common stock upon IPO and $0.2 million from the exercise of stock options, partially offset by $2.2 million in payments of issuance costs.

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Funding requirements

Our plan of operation is to continue implementing our business strategy, continue research and development of RPl and our other product candidates and continue to expand our research pipeline and our internal research and development capabilities. We expect our expenses to increase substantially in connection with our ongoing activities, particularly as we advance the preclinical activities and clinical trials of our product candidates. In addition, we expect to incur additional costs associated with operating as a public company following the completion of this offering. We expect that our expenses will increase substantially if and as we:

·conduct our current and future clinical trials of RP1;

·progress the preclinical and clinical development of RP2 and RP3;

·establish, equip , and operate our own in-house manufacturing facility;

·seek to identify and develop additional product candidates;

·seek marketing approvals for any of our product candidates that successfully complete clinical trials, if any;

·establish a sales , marketing and distribution infrastructure to commercialize any products for which we may obtain marketing approval;

·until our planned manufacturing facility is operational, require the manufacture by third parties of larger quantities of our product candidates for clinical development and potentially commercialization;

·maintain, expand and protect our intellectual property portfolio;

·acquire or in-license other drugs and technologies; and

·add operational, financial and management information systems and personnel, including personnel to support our research and development programs, any future commercialization efforts and as we continue to operate as a public company.

As of December 31, 2019, we had cash and cash equivalent s and short-term investments of $180.9 million. We believe that our existing cash and cash equivalents and short-term investments, will  enable us to fund our operating expenses and capital expenditure requirements  will enable us to fund our operating expenses and capital expenditure requirements into the second half of calendar year 2022.

Because of the numerous risks and uncertainties associated with the development of RPl and other product candidates and programs, and because the extent to which we may enter into collaborations with third parties for development of our product candidates is unknown, we are unable to estimate the timing and amounts of increased capital outlays and operating expenses associated with completing the research and development of our product candidates. Our future capital requirements will depend on many factors, including those described in this section and above under “Operating expenses-Research and development expenses.”

Developing novel biopharmaceutical products, including conducting preclinical studies and clinical trials, is a time- consuming, expensive and uncertain process that takes years to complete, and we may never generate the necessary data or results required to obtain marketing approval for any product candidates or generate revenue from the sale of any products for which we may obtain marketing approval. In addition, our product candidates, if approved, may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of therapies that we do not expect to be commercially available for many years, if ever. Accordingly, we will need to obtain substantial additional funds to achieve our business objectives.

Adequate additional funds may not be available to us on acceptable terms, or at all. We do not currently have any committed external source of funds. To the extent that we raise additional capital through the sale of our equity or convertible debt securities, your ownership interest may be diluted, and the terms of these securities may include liquidation or other preferences and anti-dilution protections that could adversely affect your rights as a common stockholder. Additional debt or preferred equity financing, if available, may involve agreements that include restrictive covenants that may limit our ability to take specific actions, such as incurring debt adversely impact our ability to conduct our business, and may require the issuance of warrants, which could potentially dilute your ownership interest.

If we raise additional funds through collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our technology, future revenue streams, research programs, or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings or collaborations, strategic alliances or licensing arrangements with third parties when needed, we may be required to delay, limit, reduce and/or terminate our product development programs or any future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

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Contractual obligations and commitments

During the nine months ended December 31, 2019, there were no material changes to our contractual obligations and commitments from those described under the heading “Management’s Discussion and Analysis of Financial Condition and Results of Operations- Contractual Obligations and Commitments” in our Annual Report on Form 10-K for the year ended March 31, 2019, which was filed with the Securities and Exchange Commission on June 28, 2019.

Critical accounting policies and significant judgments and estimates

Our condensed consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States. The preparation of our condensed consolidated financial statements and related disclosures requires us to make estimates, assumptions and judgments that affect the reported amount of assets, liabilities, revenue, costs and expenses, and related disclosures. We believe that of our critical accounting policies described under the heading “Management’s Discussion and Analysis of Financial Condition and Results of Operations-Critical Accounting Policies and Significant Judgments and Estimates” in our Annual Report on Form 10-K for the year ended March 31, 2019, which was filed with the Securities and Exchange Commission on June 28, 2019, the following involve the most judgment and complexity:

·accrued research and development expenses and

·stock-based compensation

Accordingly, we believe the policies set forth above are critical to fully understanding and evaluating our financial condition and results of operations. If actual results or events differ materially from the estimates, judgments and assumptions used by us in applying these policies, our reported financial condition and results of operations could be materially affected. There have been no significant changes to our critical accounting policies from those described in our Annual Report on Form 10-K for the year ended March 31, 2019, which was filed with the Securities and Exchange Commission on June 28, 2019.

Off-balance sheet arrangements

We did not have during the periods presented, and we do not currently have, any off-balance sheet arrangements , as defined in the rules and regulations of the SEC.

Recently issued accounting pronouncements

A description of recently issued accounting pronouncements that may potentially impact our financial position and results of operations is disclosed in Note 2 to our consolidated financial statements appearing in our Annual Report on Form 10-K for the year ended March 31, 2019 , which was filed with the Securities and Exchange Commission on June 28, 2019.

Item 3. Quantitative and qualitative disclosures about market risks

Interest rate sensitivity

As of December 31, 2019, we had cash and cash equivalents and short-term investments of $180.9 million, which consisted of cash equivalents, commercial paper and commercial debt securities. Interest income is sensitive to changes in the general level of interest rates; however, due to the nature of these investments, an immediate 10% change in interest rates would not have a material effect on the fair market value of our investment portfolio.

As of December 31, 2019, we had $10.0 million of borrowings outstanding under our Term Loan Facility. Borrowings under our Term Loan Facility bear interest at variable rates. Based on the principal amounts outstanding as of December 31, 2019, an immediate 10% change in the interest rate would not have a material impact on our debt related obligations, financial position or results of operations.

Foreign currency exchange risk

Our headquarters are located in the United States, where the majority of our general and administrative expenses are incurred in U.S. dollars. The majority of our research and development costs are incurred by our subsidiary in Oxfordshire, United Kingdom, whose functional currency is the British Pound. We are exposed to foreign exchange rate risk. During the three and nine months ended December 31, 2019, we recognized foreign currency transaction gains of $0.4 million and $8,000, respectively. During the three and nine months ended December 31, 2018, we recognized foreign currency transaction losses of $0.1 million, and $1.1 million, respectively. These gains (losses) are primarily related to unrealized and realized foreign

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currency gains and losses as a result of transactions entered into by our United Kingdom subsidiary in currencies other than the British pound, primarily the euro. These foreign currency transaction gains (losses) were recorded as a component of other income (expense), net in our consolidated statements of operations. We believe that a 10% change in the exchange rate between the British pound and the euro would not have a material impact on our financial position or results of operations.

As we continue to grow our business, our results of operations and cash flows will be subject to fluctuations due to changes in foreign currency exchange rates, which could adversely impact our results of operations. To date, we have not entered into any foreign currency hedging contracts to mitigate our exposure to foreign currency exchange risk.

Emerging growth company status

As an “emerging growth company,” the JOBS Act permits us to take advantage of an extended transition period to comply with new or revised accounting standards applicable to public companies until those standards would otherwise apply to private companies. We have irrevocably elected to “opt out” of this provision and, as a result , we will comply with new or revised accounting standards when they are required to be adopted by public companies that are not emerging growth companies.

Item 4. Controls and Procedures Evaluation of Disclosure Controls and Procedures

The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act refers to controls and procedures that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that such information is accumulated and communicated to a company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.

In designing and evaluating our disclosure controls and procedures, management recognizes that disclosure controls and procedures, no matter how well conceived and operated , can provide only reasonable, not absolute, assurance that the objectives of the disclosure controls and procedures are met. Additionally, in designing disclosure controls and procedures, our management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible disclosure controls and procedures. The  design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a control system, misstatements due to error or fraud may occur and not be detected.

Based on the evaluation of our disclosure controls and procedures as of December 31, 2019, our Chief Financial Officer and Chief Accounting Officer have concluded that, as of December 31, 2019, our disclosure controls and procedures were not effective at the reasonable assurance level as a result of the material weaknesses discussed below. Notwithstanding these material weaknesses, our management has concluded that the financial statements included elsewhere in this Quarterly Report present fairly, in all material respects, our financial position, results of operations and cash flows in conformity with generally accepted accounting principles (“GAAP”).

Material Weakness

During the audit of our consolidated financial statements as of and for the years ended March 31, 2019 and 2018, we identified material weaknesses in our internal control over financial reporting. A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis. The material weaknesses that we identified were as follows:

We did not design or maintain an effective control environment commensurate with our financial reporting requirements. We lacked a sufficient number of professionals with an appropriate level of accounting knowledge, training and experience to appropriately analyze, record and disclose accounting matters timely and accurately. Additionally, the limited personnel resulted in our inability to consistently establish appropriate authorities and responsibilities in pursuit of our financial

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reporting objectives, as demonstrated by, among other things, our insufficient segregation of duties in our accounting function. This material weakness further contributed to the material weakness below.

We did not design and maintain formal accounting policies, processes and controls to analyze, account for and disclose complex transactions, including accounting for preferred stock, stock-based compensation , warrant liabilities and leases.

Each of these control deficiencies could result in a misstatement of our accounts or disclosures that would result in a material misstatement of our annual or interim consolidated financial statements that would not be prevented or detected, and accordingly, we determined that these control deficiencies constitute material weaknesses.

Remediation Activities

We have identified and implemented, and continue to implement, certain remediation efforts to improve the effectiveness of our internal control over financial reporting and disclosure controls and procedures. These remediation efforts are ongoing. The following remedial actions have been completed as of the quarter ending December 31, 2019:

·We hired a Chief Financial Officer and other additional full-time accounting resources with appropriate levels of experience and reallocated responsibilities across the accounting organization to provide for segregation of duties and that the appropriate level of knowledge and experience is applied based on risk and complexity of transactions and tasks under review

·We engaged a professional accounting services firm to assist us in the design and documentation of our formal policies, processes and internal controls for complying with the Sarbanes-Oxley Act, including formal policies, processes and internal controls to analyze, account for and disclose complex accounting transactions.

The process of implementing an effective financial reporting system is a continuous effort that requires us to anticipate and react to changes in our business and the economic and regulatory environments and to expend significant resources to maintain a financial reporting system that is adequate to satisfy our reporting obligations. As we continue to evaluate and take actions to improve our internal control over financial reporting, we may take additional actions to address control deficiencies or modify certain of the remediation measures described above.

While progress has been made to enhance our internal control over financial reporting, we are still in the process of implementing, documenting and testing these processes, procedures and controls. Additional time is required to complete implementation and to assess and ensure the sustainability of these procedures. We will continue to devote significant time and attention to these remedial efforts. However, the material weaknesses cannot be considered remediated until the applicable remedial controls operate for a sufficient period of time and management has concluded, through testing, that these controls are operating effectively.

Changes in Internal Controls over Financial Reporting

Other than the applicable remediation efforts described above that were implemented or commenced during the three months ended December 31, 2019, there have been no other changes in our internal control over financial reporting during the three months ended December 31, 2019 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II — OTHER INFORMATION

Item 1. Legal proceedings.

We are not currently a party to any material legal proceedings.

Item 1A. Risk factors

Investing in our common stock involves a high degree of risk. You should carefully consider the risks and uncertainties described below, together with all of the other information in this Quarterly Report on Form 10-Q, including our consolidated financial statements and related notes and “Management’s discussion and analysis of results of operations and financial condition.” If any of the following risks are realized, our business, financial condition, operating results and prospects could be materially and adversely affected. In that event, the price of our common stock could decline, and you could lose part or all of your investment. The risks and uncertainties described below are not the only ones we face. Additional risks and uncertainties not presently known to us or that we currently believe to be immaterial may also adversely affect our business.

Risks related to product development

Our product candidates are in the early stages of development, are not approved for commercial sale and might never receive regulatory approval or become commercially viable. We have never generated any revenue from product sales and may never be profitable.

All of our product candidates are in research or early development. We have not generated any revenues from the sale of products and do not expect to do so for at least the next several years. Our lead product candidate, RP1, and any other product candidates will require extensive preclinical and/or clinical testing and regulatory approval prior to commercial use. Our research and development efforts may not be successful. Even if our clinical development efforts result in positive data, our product candidates may not receive regulatory approval or be successfully introduced and marketed at prices that would permit us to operate profitably.

We currently have only two product candidates in clinical development. A failure of these product candidate in clinical development would adversely affect our business and may require us to discontinue development of other product candidates based on the same or similar therapeutic approaches.

RP1 and RP2 are our only clinical development-stage product candidates. Although we have another product candidate, RP3, in preclinical development and we may develop additional product candidates in the coming years, it will take additional investment and time for such product candidates to reach the same stage of development as those that are in clinical development, and there can be no assurance that they will ever do so. Since all of the product candidates in our current pipeline are based on our Immulytic platform, if RP1 fails in development as a result of any underlying problem with our Immulytic platform, then we may be required to discontinue development of all product candidates that are based on our therapeutic approach. If we were required to discontinue development of RP1, RP2 or our other product candidates, or if any of them were to fail to receive regulatory approval or achieve sufficient market acceptance, we could be prevented from or significantly delayed in achieving profitability. We can provide no assurance that we would be successful at developing other product candidates based on an alternative therapeutic approach.

We will not be able to commercialize our product candidates if our preclinical studies do not produce successful results and/or our clinical trials do not demonstrate the safety and efficacy of our product candidates.

Our lead product candidate, RP1, is in an ongoing Phase 1/2 clinical trial alone and in combination with nivolumab and we have initiated a Phase 2 clinical trial of RP1 in combination with cemiplimab in CSCC. We also expect to enroll approximately 30 patients in a Phase 1 clinical trial of RP1 alone in organ transplant recipients with CSCC with the clinical trial expected to initiate in the first quarter of 2020. Additionally, RP2, the next product candidate from our Immulytic platform, is in an ongoing Phase 1/2 clinical trial alone and in combination with nivolumab. Our third product candidate, RP3, is in preclinical development, which we expect to enter clinical development in 2020. Our product candidates will require preclinical and/or clinical trials before we can submit a marketing application to the applicable regulatory authorities.

Our product candidates are susceptible to the risks of failure inherent at any stage of product development, including the occurrence of unexpected or unacceptable adverse events or the failure to demonstrate efficacy in clinical trials. Clinical development is expensive and can take many years to complete, and its outcome is inherently uncertain.

The results of preclinical studies, preliminary study results, and early clinical trials of our product candidates may not be predictive of the results of later stage clinical trials. Our product candidates may not perform as we expect, may ultimately have a different or no impact on tumors, may have a different mechanism of action than we expect in humans, and may not ultimately prove to be safe and effective.

Preliminary and final results from preclinical studies and early stage trials, and trials in compounds that we believe are similar to ours, may not be representative of results that are found in larger, controlled, blinded, and longer term studies. Product candidates may fail at any stage of preclinical or clinical development. Product candidates may fail to show the desired safety and efficacy traits even if they have progressed through preclinical studies or initial clinical trials. Preclinical studies and clinical trials may also reveal unfavorable product candidate characteristics, including safety concerns. A number of companies in the biopharmaceutical industry have suffered significant setbacks in clinical trials, notwithstanding promising results in earlier preclinical studies or clinical trials or promising mechanisms of action. In some instances, there can be significant variability in safety or efficacy results between different clinical trials of the same product candidate due to numerous factors, including changes in trial procedures set forth in protocols, differences in the size and type of the patient populations, changes in and adherence to the clinical trial protocols

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and the rate of dropout among clinical trial participants. Moreover, should there be an issue with the design of a clinical trial, our results may be impacted. We may not discover such a flaw until the clinical trial is at an advanced stage.

We may also experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent our ability to receive marketing approval or commercialize our product candidates, including:

·regulators or institutional review boards, or IRBs, may not authorize us or our investigators to commence a clinical trial, conduct a clinical trial at a prospective trial site, or amend trial protocols, or may require that we modify or amend our clinical trial protocols;

·we may experience delays in reaching, or fail to reach, agreement on acceptable clinical trial contracts or clinical trial protocols with prospective trial sites and/or contract research organizations, or CROs;

·clinical trials of our product candidates may produce negative or inconclusive results, or our studies may fail to reach the necessary level of statistical significance, and we may decide, or regulators may require us, to conduct additional clinical trials or abandon product development programs;

·the number of patients required for clinical trials of our product candidates may be larger than we anticipate, enrollment in these clinical trials may be slower than we anticipate or participants may drop out of these clinical trials or be lost to follow-up at a higher rate than we anticipate, or may elect to participate in alternative clinical trials sponsored by our competitors with product candidates that treat the same indications as our product candidates;

·our third party contractors may fail to comply with regulatory requirements or the clinical trial protocol, or meet their contractual obligations to us in a timely manner, or at all, or we may be required to engage in additional clinical trial site monitoring;

·we, regulators, or IRBs may require that we or our investigators suspend or terminate clinical research for various reasons, including noncompliance with regulatory requirements or a finding that the participants are being exposed to unacceptable health risks, undesirable side effects, or other unexpected characteristics of the product candidate, or due to findings of undesirable effects caused by a chemically or mechanistically similar therapeutic or therapeutic candidate;

·changes could be adopted in marketing approval policies during the development period, rendering our data insufficient to obtain marketing approval;

·statutes or regulations could be amended or new ones could be adopted;

·changes could be adopted in the regulatory review process for submitted product applications;

·the cost of clinical trials of our product candidates may be greater than we anticipate or we may have insufficient funds for a clinical trial or to pay the substantial user fees required by the FDA upon the filing of a Biologics License Application, or BLA, or equivalent authorizations from comparable foreign regulatory authorities;

·the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our product candidates may be insufficient or inadequate;

·we may decide, or regulators may require us, to conduct or gather, as applicable, additional clinical trials, analyses, reports, data, or preclinical trials, or we may abandon product development programs;

·we may fail to reach an agreement with regulators or IRBs regarding the scope, design, or implementation of our clinical trials, and the FDA or comparable foreign regulatory authorities may require changes to our study designs that make further study impractical or not financially prudent;

·regulators may ultimately disagree with the design or our conduct of our preclinical studies or clinical trials, finding that they do not support product candidate approval;

·we may have delays in adding new investigators or clinical trial sites, or we may experience a withdrawal of clinical trial sites;

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·patients that enroll in our studies may misrepresent their eligibility or may otherwise not comply with the clinical trial protocol, resulting in the need to drop the patients from the study or clinical trial, increase the needed enrollment size for the clinical trial or extend its duration;

·there may be regulatory questions or disagreements regarding interpretations of data and results;

·the FDA or comparable foreign regulatory authorities may disagree with our study design, including endpoints, or our interpretation of data from preclinical studies and clinical trials or find that a product candidate’s benefits do not outweigh its safety risks;

·the FDA or comparable foreign regulatory authorities may not accept data from studies with clinical trial sites in foreign countries;

·the FDA or comparable foreign regulatory authorities may disagree with our intended indications;

·the FDA or comparable foreign regulatory authorities may fail to approve or subsequently find fault with the manufacturing processes or our manufacturing facilities for clinical and future commercial supplies;

·the data collected from clinical trials of our product candidates may not be sufficient to the satisfaction of the FDA or comparable foreign regulatory authorities to support the submission of a BLA or other comparable submission in foreign jurisdictions or to obtain regulatory approval in the United States or elsewhere;

·the FDA or comparable foreign regulatory authorities may take longer than we anticipate to make a decision on our product candidates; and

·we may not be able to demonstrate that a product candidate provides an advantage over current standards of care or current or future competitive therapies in development.

Our development costs will also increase if we experience delays in testing or approvals, and we may not have sufficient funding to complete the testing and approval process for any of our product candidates. We may be required to obtain additional funds to complete clinical trials and prepare for possible commercialization of our product candidates. We do not know whether any preclinical tests or clinical trials beyond what we currently have planned will be required, will begin as planned, will need to be restructured, or will be completed on schedule, or at all. Significant delays relating to any preclinical or clinical trials also could shorten any periods during which we may have the exclusive right to commercialize our product candidates or allow our competitors to bring products to market before we do and impair our ability to successfully commercialize our product candidates and may harm our business and results of operations. In addition, many of the factors that cause, or lead to, delays in clinical trials may ultimately lead to the denial of marketing approval of any of our product candidates. If any of these occur, our business, financial condition, results of operations, stock price and prospects may be materially harmed.

We anticipate that our product candidates will be used in combination with third party drugs, some of which are still in development, and we have limited or no control over the supply, regulatory status, or regulatory approval of such drugs.

Our product candidates may be administered in combination with checkpoint blockade drugs, a class of drugs that are intended to stop tumor cells from “switching off” an immune system attack against themselves. We have entered into an agreement with BMS for the supply of nivolumab, its anti-PD-1 therapy, for use in connection with our current Phase 1/2 clinical trials with RP1 and RP2. We have also entered into a clinical collaboration agreement with Regeneron, which includes the supply of cemiplimab, its anti-PD-1 therapy, for clinical trials conducted under the Regeneron agreement. We are enrolling patients in our first planned clinical trial under the agreement, a randomized, controlled Phase 2 clinical trial of RP1 in combination with cemiplimab, versus cemiplimab alone, in approximately 240 patients with CSCC. We may enter into additional agreements for the supply of anti-PD-1 products for use in connection with the development of one or more of our product candidates. Our ability to develop and ultimately commercialize our product candidates used in combination with nivolumab, cemiplimab or any other checkpoint blockade therapy will depend on our ability to access such drugs on commercially reasonable terms for the clinical trials and their availability for use with the commercialized product, if approved. We cannot be certain that current or potential future commercial relationships will provide us with a steady supply of such drugs on commercially reasonable terms or at all.

Any failure to maintain or enter into new successful commercial relationships, or the expense of purchasing checkpoint blockade therapies in the market, may delay our development timelines, increase our costs and jeopardize our ability to develop our product candidates as commercially viable therapies. If any of these occur, our business, financial condition, results of operations, stock price and prospects may be materially harmed.

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Moreover, the development of product candidates for use in combination with another product or product candidate may present challenges that are not faced for single agent product candidates. While we are planning a new clinical trial for use of RP1 as a monotherapy, we are developing RP1 and our other product candidates for use in combination with anti-PD-1 or anti-PDL1 therapies and may develop RP1 or our other product candidates for use with other therapies. The FDA may require us to use more complex clinical trial designs in order to evaluate the contribution of each product and product candidate to any observed effects. It is possible that the results of these trials could show that any positive previous trial results are attributable to the combination therapy and not our product candidates. Moreover, following product approval, the FDA may require that products used in conjunction with each other be cross labeled for combined use. To the extent that we do not have rights to the other product, this may require us to work with a third party to satisfy such a requirement. Moreover, developments related to the other product may impact our clinical trials for the combination as well as our commercial prospects should we receive marketing approval. Such developments may include changes to the other product’s safety or efficacy profile, changes to the availability of the approved product, and changes to the standard of care.

In the event that BMS, Regeneron or any future collaborator or supplier cannot continue to supply their products on commercially reasonable terms, we would need to identify alternatives for accessing an anti-PD-1 therapy. Additionally, should the supply of products from BMS, Regeneron or any future collaborator or supplier be interrupted, delayed or otherwise be unavailable to us, our clinical trials may be delayed. In the event we are unable to source a supply of an alternative anti-PD-1 therapy, or are unable to do so on commercially reasonable terms, our business, financial condition, results of operations, stock price and prospects may be materially harmed.

If we fail to develop additional product candidates, our commercial opportunity could be limited.

Our lead product candidate is RP1. A key part of our strategy is to pursue clinical development of RP1 and additional product candidates, RP2 and RP3. Developing, obtaining marketing approval for, and commercializing additional product candidates will require substantial additional funding and will be subject to the risks of failure inherent in medical product development. We cannot assure our shareholders that we will be able to successfully advance any of these additional product candidates through the development process.

Even if we obtain approval from the FDA or comparable foreign regulatory authorities to market additional product candidates for the treatment of solid tumors, we cannot assure our shareholders that any such product candidates will be successfully commercialized, widely accepted in the marketplace, or more effective than other commercially available alternatives. If we are unable to successfully develop and commercialize additional product candidates, our commercial opportunity may be limited and our business, financial condition, results of operations, stock price and prospects may be materially harmed.

Risks related to regulatory approval

Even if our development efforts are successful, we may not obtain regulatory approval for any of our product candidates in the United States or other jurisdictions, which would prevent us from commercializing our product candidates. Even if we obtain regulatory approval for our product candidates, any such approval may be subject to limitations, including with respect to the approved indications or patient populations, which could impair our ability to successfully commercialize our product candidates.

We are not permitted to market or promote or sell any of our product candidates before we receive regulatory approval from the FDA or comparable foreign regulatory authorities, and we may never receive such regulatory approval for any of our product candidates. Securing marketing approval requires the submission of extensive preclinical and clinical data and supporting information to regulatory authorities for each therapeutic indication to establish the product candidate’s safety and efficacy for that indication. Securing marketing approval also requires the submission of information about the product manufacturing process to, and inspection of manufacturing facilities and clinical trial sites by, the regulatory authorities. If we do not receive approval from the FDA and comparable foreign regulatory authorities for any of our product candidates, we will not be able to commercialize such product candidates in the United States or in other jurisdictions. If significant delays in obtaining approval for and commercializing our product candidates occur in any jurisdictions, our business, financial condition, results of operations, stock price and prospects will be materially harmed. Even if our product candidates are approved, they may:

·be subject to limitations on the indicated uses or patient populations for which they may be marketed, distribution restrictions, or other conditions of approval;

·contain significant safety warnings, including boxed warnings, contraindications, and precautions;

·not be approved with label statements necessary or desirable for successful commercialization; or

·contain requirements for costly postmarket testing and surveillance, or other requirements, including the submission of a risk evaluation and mitigation strategy, or REMS, to monitor the safety or efficacy of the products.

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We have not previously submitted a BLA to the FDA, or a similar marketing application to comparable foreign regulatory authorities, for any product candidate, and we can provide no assurance that we will ultimately be successful in obtaining regulatory approval for claims that are necessary or desirable for successful marketing, or at all.

The regulatory approval processes of the FDA and comparable foreign regulatory authorities are lengthy, time consuming and inherently unpredictable. If we are not able to obtain, or experience delays in obtaining, required regulatory approvals, we will not be able to commercialize our product candidates as expected, and our ability to generate revenue may be materially impaired.

The time required to obtain approval by the FDA and comparable foreign regulatory authorities is unpredictable but typically takes many years following the commencement of clinical trials and depends upon numerous factors, including the substantial discretion of the regulatory authorities. In addition, approval policies, regulations, or the type and amount of clinical data necessary to gain approval may change during the course of a product candidate’s clinical development and may vary among jurisdictions and there may be varying interpretations of data obtained from preclinical studies or clinical trials, any of which may cause delays or limitations in the approval or a decision not to approve an application. These regulatory requirements may require us to amend our clinical trial protocols, conduct additional preclinical studies or clinical trials that may require regulatory or IRB approval, or otherwise cause delays in the approval or rejection of an application. Any delay in obtaining or failure to obtain required approvals could materially adversely affect our ability to generate revenue from the particular product candidate, which may materially harm our business, financial condition, results of operations, stock price and prospects.

If we experience delays in obtaining approval, if we fail to obtain approval of a product candidate or if the label for a product candidate does not include the labeling claims necessary or desirable for the successful commercialization of that product candidate, the commercial prospects for such product candidate may be harmed and our ability to generate revenues from that product candidate may be materially impaired.

The FDA or a comparable foreign regulatory authority may determine that our product candidates have undesirable side effects that could delay or prevent their regulatory approval or commercialization.

To date, the most commonly reported adverse events observed for RP1 are local injection site reactions and systemic constitutional symptoms, such as fatigue, fevers and chills. However, there can be no assurance that additional undesirable side effects or serious adverse events will not be caused by or associated with RP1 or our other product candidates as they continue through or enter clinical development. Serious adverse events or undesirable side effects caused by our product candidates could cause us, IRBs, and other reviewing entities or regulatory authorities to interrupt, delay, or halt clinical trials and could result in a more restrictive label or the delay or denial of regulatory approval by the FDA or comparable foreign regulatory authorities. For example, if concerns are raised regarding the safety of a new therapeutic as a result of undesirable side effects identified during clinical or preclinical testing, the FDA or comparable foreign regulatory authority may order us to cease further development, decline to approve the product candidate or issue a letter requesting additional data or information prior to making a final decision regarding whether or not to approve the product candidate. The FDA or comparable foreign regulatory authorities, or IRBs and other reviewing entities, may also require, or we may voluntarily develop, strategies for managing adverse events during clinical development, which could include restrictions on our enrollment criteria, the use of stopping criteria, adjustments to a study’s design, or the monitoring of safety data by a data monitoring committee, among other strategies. FDA or comparable foreign regulatory authority requests for additional data or information could also result in substantial delays in the approval of our product candidates.

Undesirable side effects caused by any of our product candidates could also result in denial of regulatory approval by the FDA or comparable foreign regulatory authorities for any or all targeted indications or the inclusion of unfavorable information in our product labeling, such as limitations on the indicated uses for which the products may be marketed or distributed, a label with significant safety warnings, including boxed warnings, contraindications, and precautions, a label without statements necessary or desirable for successful commercialization, or may result in requirements for costly postmarketing testing and surveillance, or other requirements, including REMS, to monitor the safety or efficacy of the products, and in turn prevent us from commercializing and generating revenues from the sale of our product candidates. Undesirable side effects may limit the potential market for any approved products or could result in the discontinuation of the sales and marketing of the product, or withdrawal of product approvals. Later discovered undesirable side effects may further result in the imposition of a REMS, label revisions, post approval study requirements, or other testing and surveillance.

If any of our product candidates is associated with serious adverse events or undesirable side effects or have properties that are unexpected, we may need to abandon development or limit development of that product candidate to certain uses or subpopulations in which the undesirable side effects or other characteristics are less prevalent, less severe or more acceptable from a risk/benefit perspective. The therapeutic-related side effects could affect patient recruitment or the ability of enrolled patients to

complete the trial or result in potential product liability claims. Any of these occurrences may materially harm our business, financial condition, results of operations, stock price and prospects.

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Changes in product candidate manufacturing or formulation may result in additional costs or delay.

As product candidates are developed through preclinical studies to later stage clinical trials towards approval and commercialization, it is common that various aspects of the development program, such as manufacturing methods and formulation, are altered along the way in an effort to optimize processes and results. Any of these changes could cause our product candidates to perform differently and affect the results of planned clinical trials or other future clinical trials conducted with the altered materials. Such changes may also require additional testing, or notification to, or approval by the FDA or a comparable foreign regulatory authority. This could delay completion of clinical trials, require the conduct of bridging clinical trials or studies, require the repetition of one or more clinical trials, increase clinical trial costs, delay approval of our product candidates and/or jeopardize our ability to commence product sales and generate revenue.

Regulatory approval by the FDA or comparable foreign regulatory authorities is limited to those specific indications and conditions for which approval has been granted, and we may be subject to substantial fines, criminal penalties, injunctions, or other enforcement actions if we are determined to be promoting the use of our products for unapproved or “off label” uses, resulting in damage to our reputation and business.

We must comply with requirements concerning advertising and promotion for any product candidates for which we obtain marketing approval. Promotional communications with respect to therapeutics are subject to a variety of legal and regulatory restrictions and continuing review by the FDA, Department of Justice, Department of Health and Human Services’ Office of Inspector General, state attorneys general, members of Congress, and the public. When the FDA or comparable foreign regulatory authorities issue regulatory approval for a product candidate, the regulatory approval is limited to those specific uses and indications for which a product is approved. If we are not able to obtain FDA approval for desired uses or indications for our product candidates, we may not market or promote them for those indications and uses, referred to as off label uses, and our business, financial condition, results of operations, stock price and prospects will be materially harmed. We also must sufficiently substantiate any claims that we make for our products, including claims comparing our products to other companies’ products, and must abide by the FDA’s strict requirements regarding the content of promotion and advertising.

While physicians may choose to prescribe products for uses that are not described in the product’s labeling and for uses that differ from those tested in clinical trials and approved by the regulatory authorities, we are prohibited from marketing and promoting the products for indications and uses that are not specifically approved by the FDA. These off label uses are common across medical specialties and may constitute an appropriate treatment for some patients in varied circumstances. Regulatory authorities in the United States generally do not restrict or regulate the behavior of physicians in their choice of treatment within the practice of medicine. Regulatory authorities do, however, restrict communications by biopharmaceutical companies concerning off label use.

If we are found to have impermissibly promoted any of our product candidates, we may become subject to significant liability and government fines. The FDA and other agencies actively enforce the laws and regulations regarding product promotion, particularly those prohibiting the promotion of off label uses, and a company that is found to have improperly promoted a product may be subject to significant sanctions. The federal government has levied large civil and criminal fines against companies for alleged improper promotion and has enjoined several companies from engaging in off label promotion. The FDA has also requested that companies enter into consent decrees or permanent injunctions under which specified promotional conduct is changed or curtailed.

In the United States, engaging in the impermissible promotion of our products, following approval, for off label uses can also subject us to false claims and other litigation under federal and state statutes. These include fraud and abuse and consumer protection laws, which can lead to civil and criminal penalties and fines, agreements with governmental authorities that materially restrict the manner in which we promote or distribute therapeutic products and conduct our business. These restrictions could include corporate integrity agreements, suspension or exclusion from participation in federal and state healthcare programs, and suspension and debarment from government contracts and refusal of orders under existing government contracts. These False Claims Act lawsuits against manufacturers of drugs and biologics have increased significantly in volume and breadth. In addition, False Claims Act lawsuits may expose manufacturers to follow-on claims by private payers based on fraudulent marketing practices. This growth in litigation has increased the risk that a biopharmaceutical company will have to defend a false claim action, pay settlement fines or restitution, as well as criminal and civil penalties, agree to comply with burdensome reporting and compliance obligations, and be excluded from Medicare, Medicaid, or other federal and state healthcare programs. If we do not lawfully promote our approved products, if any, we may become subject to such litigation and, if we do not successfully defend against such actions, those actions may have a material adverse effect on our business, financial condition, results of operations, stock price and prospects.

In the United States, the promotion of biopharmaceutical products is subject to additional FDA requirements and restrictions on promotional statements. If after one or more of our product candidates obtains marketing approval the FDA determines that our

promotional activities violate its regulations and policies pertaining to product promotion, it could request that we modify our promotional materials or subject us to regulatory or other enforcement actions, including issuance of warning letters or untitled letters, suspension or withdrawal of an approved product from the market, requests for recalls, payment of civil fines, disgorgement of

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money, imposition of operating restrictions, injunctions or criminal prosecution, and other enforcement actions. Similarly, industry codes in foreign jurisdictions may prohibit companies from engaging in certain promotional activities and regulatory agencies in various countries may enforce violations of such codes with civil penalties. If we become subject to regulatory and enforcement actions our business, financial condition, results of operations, stock price and prospects will be materially harmed.

Even if our product candidates receive regulatory approval, we will be subject to ongoing obligations and continued regulatory review, which may result in significant additional expense and limit how we manufacture and market our products.

Any product candidate for which we obtain marketing approval will be subject to extensive and ongoing requirements of and review by the FDA and comparable foreign regulatory authorities, including requirements related to the manufacturing processes, post approval clinical data, labeling, packaging, distribution, adverse event reporting, storage, recordkeeping, export, import, advertising, marketing, and promotional activities for such product. These requirements further include submissions of safety and other postmarketing information, including manufacturing deviations and reports, registration and listing requirements, the payment of annual fees, continued compliance with current Good Manufacturing Practice, or cGMP, requirements relating to manufacturing, quality control, quality assurance, and corresponding maintenance of records and documents, and good clinical practices, or GCPs, for any clinical trials that we conduct post approval.

The FDA and comparable foreign regulatory authorities will continue to closely monitor the safety profile of any product even after approval. If the FDA or comparable foreign regulatory authorities become aware of new safety information after approval of any of our product candidates, they may withdraw approval, issue public safety alerts, require labeling changes or establishment of a REMS or similar strategy, impose significant restrictions on a product’s indicated uses or marketing, or impose ongoing requirements for potentially costly post approval studies or postmarket surveillance. Any such restrictions could limit sales of the product.

We and any of our suppliers or collaborators, including our contract manufacturers, could be subject to periodic unannounced inspections by the FDA to monitor and ensure compliance with cGMPs and other FDA regulatory requirements. Application holders must further notify the FDA, and depending on the nature of the change, obtain FDA preapproval for product and manufacturing changes.

In addition, later discovery of previously unknown adverse events or that the product is less effective than previously thought or other problems with our products, manufacturers or manufacturing processes, or failure to comply with regulatory requirements both before and after approval, may yield various negative results, including:

·restrictions on manufacturing, distribution, or marketing of such products;

·restrictions on the labeling, including required additional warnings, such as black boxed warnings, contraindications, precautions, and restrictions on the approved indication or use;

·modifications to promotional pieces;

·issuance of corrective information;

·requirements to conduct postmarketing studies or other clinical trials;

·clinical holds or termination of clinical trials;

·requirements to establish or modify a REMS or similar strategy;

·changes to the way the product candidate is administered;

·liability for harm caused to patients or subjects;

·reputational harm;

·the product becoming less competitive;

·warning, untitled, or cyber letters;

·suspension of marketing or withdrawal of the products from the market;

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·regulatory authority issuance of safety alerts, Dear Healthcare Provider letters, press releases, or other communications containing warnings or other safety information about the product candidate;

·refusal to approve pending applications or supplements to approved applications that we submit;

·recalls of products;

·fines, restitution or disgorgement of profits or revenues;

·suspension or withdrawal of marketing approvals;

·refusal to permit the import or export of our products;

·product seizure or detention;

·FDA debarment, suspension and debarment from government contracts, and refusal of orders under existing government contracts, exclusion from federal healthcare programs, consent decrees, or corporate integrity agreements; or

·injunctions or the imposition of civil or criminal penalties, including imprisonment.

Any of these events could prevent us from achieving or maintaining market acceptance of the particular product candidate, if approved, or could substantially increase the costs and expenses of commercializing such product, which in turn could delay or prevent us from generating significant revenues from its marketing and sale. Any of these events could further have other material and adverse effects on our operations and business and could adversely impact our business, financial condition, results of operations, stock price and prospects.

The FDA’s policies or those of comparable foreign regulatory authorities may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates, limit the marketability of our product candidates, or impose additional regulatory obligations on us. Changes in medical practice and standard of care may also impact the marketability of our product candidates.

If we are slow or unable to adapt to changes in existing requirements, standards of care, or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and be subject to regulatory enforcement action.

Should any of the above actions take place, we could be prevented from or significantly delayed in achieving profitability. Further, the cost of compliance with post approval regulations may have a negative effect on our operations and business and could adversely impact our business, financial condition, results of operations, stock price and prospects.

Obtaining and maintaining marketing approval for our product candidates in one jurisdiction would not mean that we will be successful in obtaining marketing approval of that product candidate in other jurisdictions, which could prevent us from marketing our products internationally.

Obtaining and maintaining marketing approval of our product candidates in one jurisdiction would not guarantee that we will be able to obtain or maintain marketing approval in any other jurisdiction, while a failure or delay in obtaining marketing approval in one jurisdiction may have a negative effect on the marketing approval process in others. For example, even if the FDA grants marketing approval of a product candidate, comparable foreign regulatory authorities must also approve the manufacturing, marketing and promotion of the product candidate in those countries. Approval procedures vary among jurisdictions and can involve requirements and administrative review periods different from, and, in some cases, greater than, those in the United States, including additional preclinical studies or clinical trials, as clinical trials conducted in one jurisdiction may not be accepted by regulatory authorities in other jurisdictions. In many jurisdictions outside the United States, a product candidate must be approved for reimbursement before it can be approved for sale in that jurisdiction. In some cases, the price that we intend to charge for our products is also subject to approval. Additionally, the outcome of the United Kingdom’s impending withdrawal from the European Union, commonly referred to as Brexit, remains uncertain. Since a significant proportion of the regulatory framework in the United Kingdom is derived from European Union directives and regulations, the withdrawal of the United Kingdom from the European Union could materially impact the regulatory regime with respect to the approval of our product candidates in the United Kingdom or the European Union.

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Regulatory authorities in jurisdictions outside of the United States have requirements for approval of product candidates with which we must comply prior to marketing in those jurisdictions. Obtaining foreign marketing approvals and compliance with foreign regulatory requirements, including compliance with Brexit, could result in significant delays, difficulties and costs for us and could delay or prevent the introduction of our products in certain countries. If we fail to comply with the regulatory requirements in international markets and/or receive applicable marketing approvals, our target market will be reduced and our ability to realize the full market potential of our product candidates will be harmed. If we obtain approval for any product candidate and ultimately commercialize that product in foreign markets, we would be subject to additional risks and uncertainties, including the burden of complying with complex and changing foreign regulatory, tax, accounting and legal requirements and the reduced protection of intellectual property rights in some foreign countries.

Risks related to commercialization

If we are unable to successfully commercialize any product candidate for which we receive regulatory approval, or experience significant delays in doing so, our business will be materially harmed.

If we are successful in obtaining marketing approval from applicable regulatory authorities for RP1 or any of our other product candidates, our ability to generate revenues from our product candidates will depend on our success in:

·launching commercial sales of our product candidates, whether alone or in collaboration with others;

·receiving an approved label with claims that are necessary or desirable for successful marketing, and that does not contain safety or other limitations that would impede our ability to market the product candidates;

·creating market demand for our product candidates through marketing, sales and promotion activities;

·hiring, training, and deploying a sales force or contracting with third parties to commercialize product candidates in the United States;

·manufacturing product candidates in sufficient quantities and at acceptable quality and cost to meet commercial demand at launch and thereafter;

·establishing and maintaining agreements with wholesalers, distributors, and group purchasing organizations on commercially reasonable terms;

·creating partnerships with, or offering licenses to, third parties to promote and sell product candidates in foreign markets where we receive marketing approval;

·maintaining patent and trade secret protection and regulatory exclusivity for our product candidates;

·achieving market acceptance of our product candidates by patients, the medical community, and third party payors;

·achieving appropriate reimbursement for our product candidates;

·effectively competing with other therapies; and

·maintaining a continued acceptable safety profile of our product candidates following launch.

To the extent we are not able to do any of the foregoing, our business, financial condition, results of operations, stock price and prospects will be materially harmed.

We face significant competition from other biopharmaceutical and biotechnology companies, academic institutions, government agencies, and other research organizations, which may result in others discovering, developing or commercializing products more quickly or marketing them more successfully than us. If their product candidates are shown to be safer or more effective than ours, our commercial opportunity may be reduced or eliminated.

The development and commercialization of cancer immunotherapy products is characterized by rapidly advancing technologies, intense competition and a strong emphasis on proprietary rights. We face competition with respect to our current product candidates, and will face competition with respect to any product candidates that we may seek to develop or commercialize in the future, from major biopharmaceutical companies, specialty biopharmaceutical companies, and biotechnology companies worldwide. There are a number of large biopharmaceutical and biotechnology companies that currently market and sell products or are pursuing

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the development of products for the treatment of solid tumors, including oncolytic immunotherapy and cancer vaccine approaches. Potential competitors also include academic institutions, government agencies, and other public and private research organizations that conduct research, seek patent protection, and establish collaborative arrangements for research, development, manufacturing, and commercialization.

While our product candidates are intended to be used in combination with other drugs with different mechanisms of action, if and when marketed they will still compete with a number of drugs that are currently marketed or in development that also target cancer. To compete effectively with these drugs, our product candidates will need to demonstrate advantages in clinical efficacy and safety compared to these competitors when used alone or in combination with other drugs.

Our commercial opportunities could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are easier to administer or are less expensive alone or in combination with other therapies than any products that we may develop alone or in combination with other therapies. Our competitors also may obtain FDA or comparable foreign regulatory authorities’ approval for their products more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market position before we are able to enter the market. In addition, our ability to compete may be affected in many cases by insurers or other third party payors coverage decisions.

Many of the companies with which we are competing or may compete in the future have significantly greater financial resources and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals, and marketing approved products than we do. Mergers and acquisitions in the biopharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. Early stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and

established companies. These third parties compete with us in recruiting and retaining qualified scientific and management personnel and establishing clinical trial sites and patient registration for clinical trials, as well as in developing or acquiring technologies complementary to, or necessary for, our programs. If we are unable to successfully compete with these companies our business, financial condition, results of operations, stock price and prospects may be materially harmed.

If we are unable to establish effective marketing, sales and distribution capabilities or enter into agreements with third parties to market and sell our product candidates, if they are approved, the revenues that we generate may be limited and we may never become profitable.

We currently do not have a commercial infrastructure for the marketing, sale, and distribution of our cancer immunotherapies. If and when our product candidates receive marketing approval, we intend to commercialize our product candidates on our own in the United States and potentially with pharmaceutical or biotechnology partners in other geographies. In order to commercialize our products, we must build our marketing, sales, and distribution capabilities or make arrangements with third parties to perform these services. We may not be successful in doing so. Should we decide to move forward in developing our own marketing capabilities, we may incur expenses prior to product launch or even approval in order to recruit a sales force and develop a marketing and sales infrastructure. If a commercial launch is delayed as a result of the FDA or comparable foreign regulatory authority requirements or other reasons, we would incur these expenses prior to being able to realize any revenue from sales of our product candidates. Even if we are able to effectively hire a sales force and develop a marketing and sales infrastructure, our sales force and marketing teams may not be successful in commercializing our product candidates. This may be costly, and our investment would be lost if we cannot retain or reposition our sales and marketing personnel.

We may also or alternatively decide to collaborate with third party marketing and sales organizations to commercialize any approved product candidates in the United States, in which event, our ability to generate product revenues may be limited. To the extent we rely on third parties to commercialize any products for which we obtain regulatory approval, we may receive less revenues than if we commercialized these products ourselves, which could materially harm our prospects. In addition, we would have less control over the sales efforts of any other third parties involved in our commercialization efforts, and could be held liable if they failed to comply with applicable legal or regulatory requirements.

We have no prior experience in the marketing, sale, and distribution of biopharmaceutical products, and there are significant risks involved in building and managing a commercial infrastructure. The establishment and development of commercial capabilities, including compliance plans, to market any products we may develop will be expensive and time consuming and could delay any product launch, and we may not be able to successfully develop this capability. We will have to compete with other biopharmaceutical and biotechnology companies, including oncology-focused companies, to recruit, hire, train, manage, and retain marketing and sales personnel, which is expensive and time consuming and could delay any product launch. Developing our sales capabilities may also divert resources and management attention away from product development.

In the event we are unable to develop a marketing and sales infrastructure, we may not be able to commercialize our product candidates in the United States or elsewhere, which could limit our ability to generate product revenues and materially harm our

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business, financial condition, results of operations, stock price and prospects. Factors that may inhibit our efforts to commercialize our product candidates include:

·the inability to recruit, train, manage, and retain adequate numbers of effective sales and marketing personnel;

·the inability of sales personnel to obtain access to physicians or persuade adequate numbers of physicians to prescribe our product candidates;

·our inability to effectively oversee a geographically dispersed sales and marketing team;

·the costs associated with training sales and marketing personnel on legal and regulatory compliance matters and monitoring their actions;

·an inability to secure adequate coverage and reimbursement by government and private health plans;

·the clinical indications for which the products are approved and the claims that we may make for the products;

·limitations or warnings, including distribution or use restrictions, contained in the products’ approved labeling;

·any distribution and use restrictions imposed by the FDA or comparable foreign regulatory authorities or to which we agree as part of a mandatory REMS or voluntary risk management plan;

·liability for sales or marketing personnel who fail to comply with the applicable legal and regulatory requirements;

·the lack of complementary products to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies with more extensive product lines; and

·unforeseen costs and expenses associated with creating an independent sales and marketing organization or engaging a contract sales organization.

Our product candidates are based on a novel approach to the treatment of cancer, which makes it difficult to predict the time and cost of product candidate development.

We have concentrated all of our research and development efforts on product candidates based on our Immulytic platform, and our future success depends on the successful development of this therapeutic approach. There can be no assurance that any development problems we experience in the future will not cause significant delays or unanticipated costs, or that such development problems can be solved. Should we encounter development problems, including unfavorable preclinical or clinical trial results, the FDA and foreign regulatory authorities may refuse to approve our product candidates, or may require additional information, tests, or trials, which could significantly delay product development and significantly increase our development costs. Moreover, even if we are able to provide the requested information or trials to the FDA, there would be no guarantee that the FDA would accept them or approve our product candidates. We may also experience delays in developing a sustainable, reproducible and scalable manufacturing process, or developing or qualifying and validating product release assays, other testing and manufacturing methods, and our equipment and facilities in a timely manner, which may prevent us from completing our clinical trials or commercializing our product candidates on a timely or profitable basis, if at all.

In addition, the clinical trial requirements of the FDA and comparable foreign regulatory authorities and the criteria these regulators use to determine the safety and efficacy of a product candidate vary substantially according to the type, complexity, novelty and intended use and market of the potential products. The FDA and comparable foreign regulatory authorities have limited experience with the approval of oncolytic immunotherapies. Only one oncolytic immunotherapy, TVec, has received FDA approval to date. Any product candidates that are approved may be subject to extensive post-approval regulatory requirements, including requirements pertaining to manufacturing, distribution, and promotion. We may need to devote significant time and resources to compliance with these requirements.

If our product candidates do not achieve broad market acceptance, the revenues that we generate from their sales may be limited, and we may never become profitable.

We have never commercialized a product candidate for any indication. Even if our product candidates are approved by the appropriate regulatory authorities for marketing and sale, they may not gain acceptance among physicians, patients, third party payors, and others in the medical community. If any product candidates for which we obtain regulatory approval do not gain an adequate level of market acceptance, we could be prevented from or significantly delayed in achieving profitability. Market acceptance of our product candidates by the medical community, patients, and third party payors will depend on a number of factors, some of which are

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beyond our control. For example, physicians are often reluctant to switch their patients and patients may be reluctant to switch from existing therapies even when new and potentially more effective or safer treatments enter the market.

Efforts to educate the medical community and third party payors on the benefits of our product candidates may require significant resources and may not be successful. If any of our product candidates is approved but does not achieve an adequate level of market acceptance, we could be prevented from or significantly delayed in achieving profitability. The degree of market acceptance of any of our product candidates will depend on a number of factors, including:

·the efficacy of our product candidates in combination with marketed checkpoint blockade drugs;

·the commercial success of the checkpoint blockade drugs with which our products are co-administered;

·the prevalence and severity of adverse events associated with our product candidates or those products with which they are co-administered;

·the clinical indications for which the products are approved and the approved claims that we may make for the products;

·limitations or warnings contained in the product’s FDA-approved labeling or those of comparable foreign regulatory authorities, including potential limitations or warnings for our product candidates that may be more restrictive than other competitive products;

·changes in the standard of care for the targeted indications for our product candidates, which could reduce the marketing impact of any claims that we could make following FDA approval or approval by comparable foreign regulatory authorities, if obtained;

·the relative convenience and ease of administration of our product candidates by direct injection into tumors, a less common method for the administration of oncology therapies than systemic administration, which may result in slower adoption of our therapies;

·the relative convenience and ease of administration of any products with which our product candidates are co-administered;

·the cost of treatment compared with the economic and clinical benefit of alternative treatments or therapies;

·the availability of adequate coverage or reimbursement by third parties, such as insurance companies and other healthcare payors, and by government healthcare programs, including Medicare and Medicaid;

·the price concessions required by third party payors to obtain coverage;

·the extent and strength of our marketing and distribution of our product candidates;

·the safety, efficacy, and other potential advantages over, and availability of, alternative treatments already used or that may later be approved;

·distribution and use restrictions imposed by the FDA or comparable foreign regulatory authorities with respect to our product candidates or to which we agree as part of a REMS or voluntary risk management plan;

·the timing of market introduction of our product candidates, as well as competitive products;

·our ability to offer our product candidates for sale at competitive prices;

·the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies;

·the extent and strength of our third party manufacturer and supplier support;

·the actions of companies that market any products with which our product candidates are co-administered;

·the approval of other new products;

·adverse publicity about our product candidates or any products with which they are co-administered, or favorable publicity about competitive products; and

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·potential product liability claims.

The size of the potential market for our product candidates is difficult to estimate and, if any of our assumptions are inaccurate, the actual markets for our product candidates may be smaller than our estimates.

The potential market opportunities for our product candidates are difficult to estimate and will depend in large part on the drugs with which our product candidates are co-administered and the success of competing therapies and therapeutic approaches. In particular, the market opportunity for oncolytic immunotherapies is hard to estimate given that it is an emerging field with only one existing FDA-approved oncolytic immunotherapy, TVec, which has yet to enjoy broad market acceptance. Our estimates of the

potential market opportunities are predicated on many assumptions, which may include industry knowledge and publications, third party research reports, and other surveys. Although we believe that our internal assumptions are reasonable, these assumptions involve the exercise of significant judgment on the part of our management, are inherently uncertain, and their reasonableness has not been assessed by an independent source. If any of the assumptions proves to be inaccurate, the actual markets for our product candidates could be smaller than our estimates of the potential market opportunities.

Negative developments in the field of immune-oncology could damage public perception of RP1 or any of our other product candidates and negatively affect our business.

The commercial success of our product candidates will depend in part on public acceptance of the use of cancer immunotherapies. Adverse events in clinical trials of RP1 or our other product candidates or in clinical trials of others developing similar products and the resulting publicity, as well as any other negative developments in the field of immuno-oncology that may occur in the future, including in connection with competitor therapies, could result in a decrease in demand for RP1 or our other product candidates that we may develop. These events could also result in the suspension, discontinuation, or clinical hold of or modification to our clinical trials. If public perception is influenced by claims that the use of cancer immunotherapies is unsafe, whether related to our therapies or those of our competitors, our product candidates may not be accepted by the general public or the medical community and potential clinical trial subjects may be discouraged from enrolling in our clinical trials. As a result, we may not be able to continue or may be delayed in conducting our development programs.

As our product candidates consist of a modified virus, adverse developments in antiviral vaccines or clinical trials of other oncolytic immunotherapy products based on viruses may result in a disproportionately negative effect for RP1 or our other product candidates as compared to other products in the field of immune-oncology that are not based on viruses. Future negative developments in the field of immune-oncology or the biopharmaceutical industry could also result in greater governmental regulation, stricter labeling requirements and potential regulatory delays in the testing or approvals of our products. Any increased scrutiny could delay or increase the costs of obtaining marketing approval for RP1 or our other product candidates.

Risks related to our financial position and need for additional capital

We are a clinical stage biopharmaceutical company with a very limited operating history. We have incurred net losses since our inception and anticipate that we will continue to incur substantial and increasing net losses in the foreseeable future. We may never achieve or sustain profitability.

We are a clinical stage biopharmaceutical company with a limited operating history, and we are early in our development efforts. We have no products approved for commercial sale and have not generated any revenue from product sales to date, and we continue to incur significant research and development and other expenses related to our ongoing operations. Investment in biopharmaceutical product development is highly speculative because it entails substantial upfront capital expenditures and significant risk that any potential product candidate will fail to demonstrate adequate efficacy or an acceptable safety profile, gain marketing approval and become commercially viable. We have financed our operations to date primarily through the sale of equity securities, including the sale of our common stock in our public offerings. Since our inception, most of our resources have been dedicated to the preclinical and clinical development of our Immulytic platform, RP1 and our other product candidates. The size of our future net losses will depend, in part, on our future expenses and our ability to generate revenue, if any.

We are not profitable and have incurred losses in each period since our inception. For the years ended March 31, 2019 and 2018, we reported a net loss of $30.8 million and $19.7 million, respectively. For the three and nine months ended December 31, 2019, we reported a net loss of $16.2 million and $36.8 million, respectively. For the three and nine months ended December 31, 2018, we reported a net loss of $7.7 million and $24.2 million, respectively. At December 31, 2019, we had an accumulated deficit of $96.5 million. We expect to continue to incur significant losses for the foreseeable future, and we expect these losses to increase as we

continue our research and development of, and seek marketing approvals for, RP1 and any additional product candidates we may develop.

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Even if we succeed in receiving marketing approval for and commercialize RP1, we will continue to incur substantial research and development and other expenditures to develop and market additional potential products. We may encounter unforeseen expenses, difficulties, complications, delays and other unknown factors that may adversely affect our business. The size of our future net losses will depend, in part, on the rate of future growth of our expenses and our ability to generate revenue. Our prior losses and expected future losses have had and will continue to have an adverse effect on our stockholders’ equity and working capital.

We have never generated any revenue from product sales, and our ability to generate revenue from product sales and become profitable will depend significantly on our success in achieving a number of goals.

We have no products approved for commercial sale, have not generated any revenue from product sales, and do not anticipate generating any revenue from product sales until after we have received marketing approval for the commercial sale of a product candidate, if ever. Our ability to generate revenue and achieve profitability depends significantly on our success in achieving a number of goals, including:

·completing research regarding, and preclinical and clinical development of, RP1 and our other product candidates;

·obtaining marketing approvals for RP1 and our other product candidates for which we complete clinical trials;

·developing a sustainable and scalable manufacturing process for RP1 and our other product candidates, including establishing and maintaining commercially viable supply and manufacturing relationships with third parties;

·launching and commercializing RP1 and our other product candidates for which we obtain marketing approvals, either directly or with a collaborator or distributor;

·obtaining market acceptance of RP1 and our other product candidates as viable treatment options;

·addressing any competing technological and market developments;

·identifying, assessing, acquiring and developing new product candidates;

·negotiating favorable terms in any collaboration, licensing, or other arrangements into which we may enter;

·obtaining, maintaining, protecting, and expanding our portfolio of intellectual property rights, including patents, trade secrets, and know-how; and

·attracting, hiring, and retaining qualified personnel.

Even if our product candidates or any future product candidates that we develop are approved for commercial sale, we anticipate incurring significant costs associated with commercializing any such product candidate. Our expenses could increase beyond expectations if we are required by the FDA or comparable foreign regulatory authorities to change our manufacturing processes or assays, or to perform clinical, nonclinical, or other types of studies in addition to those that we currently anticipate.

If we are successful in obtaining regulatory approvals to market RP1 or our other product candidates, our revenue will be dependent, in part, upon the size of the markets in the territories for which we gain marketing approval, the accepted price for the product, the ability to get reimbursement at any price, and whether we own the commercial rights for that territory. If the number of our addressable patients is not as significant as we estimate, the indication approved by regulatory authorities is narrower than we expect, the labels for our product candidates contain significant safety warnings, regulatory authorities impose burdensome or restrictive distribution requirements, or the reasonably accepted patient population for treatment is narrowed by competition, physician choice or treatment guidelines, we may not generate significant revenue from sales of such products, even if approved. If we are not able to generate revenue from the sale of any approved products, we could be prevented from or significantly delayed in achieving profitability.

We will require substantial additional financing to achieve our goals, and a failure to obtain this necessary capital when needed on acceptable terms, or at all, could force us to delay, limit, reduce or terminate our product development or commercialization efforts.

Our operations have consumed substantial amounts of cash since inception. At December 31, 2019, our cash and cash equivalents and short-term investments were $180.9  million We expect to continue to spend substantial amounts to continue the

clinical and preclinical development of RP1 and our other product candidates. Accordingly, we will need to obtain substantial additional funds to achieve our business objectives. If we are able to gain marketing approval of any product candidate, we will

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require significant additional amounts of cash in order to launch and commercialize such product. In addition, other unanticipated costs may arise.

Our future capital requirements depend on many factors, including:

·the scope, progress, results and costs of researching and developing RP1 and our other product candidates, and conducting preclinical studies and clinical trials;

·the timing of, and the costs involved in, obtaining marketing approvals for RP1 and our other product candidates if clinical trials are successful;

·the success of any collaborations;

·the cost of commercialization activities for any approved product, including marketing, sales and distribution costs;

·the cost and timing of operating our manufacturing facility;

·the cost of manufacturing RP1 and our other product candidates for clinical trials in preparation for marketing approval and commercialization;

·our ability to establish and maintain strategic licensing or other arrangements and the financial terms of such agreements;

·the costs involved in preparing, filing, prosecuting, maintaining, expanding, defending and enforcing patent claims, including litigation costs and the outcome of such litigation;

·the timing, receipt, and amount of sales of, or royalties on, our future products, if any; and

·the emergence of competing cancer therapies and other adverse market developments.

We do not have any committed external source of funds or other support for our development efforts. Until we can generate sufficient product revenue to finance our cash requirements, which we may never do, we expect to finance our future cash needs through a combination of public or private equity offerings, debt financings, collaborations, strategic alliances, licensing arrangements and other marketing or distribution arrangements. Based on our research and development plans, we expect that our existing cash and cash equivalents and short term investments will enable us to fund our planned operating expenses and capital expenditure requirements into the second half of calendar year 2022. We have based this estimate on assumptions that may prove to be wrong, and we could exhaust our available capital resources sooner than we expect. In addition, because the design and outcome of our planned and anticipated clinical trials is highly uncertain, we cannot reasonably estimate the actual amounts necessary to successfully complete the development and commercialization of RP1 or our other product candidates.

Raising additional capital may cause dilution to our stockholders, restrict our operations or require us to relinquish rights to our technologies or product candidates.

To the extent that we raise additional capital through the sale of common stock or securities convertible or exchangeable into common stock, our existing stockholders’ interest will be diluted. Debt financing, if available, would increase our fixed payment obligations and may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends.

If we are unable to raise additional funds through equity or debt financings when needed, we may be required to grant rights to develop and market one or more of our product candidates or technologies that we would otherwise prefer to develop and market ourselves.

Risks related to intellectual property

If we are unable to obtain, maintain and protect our intellectual property rights for our technology and product candidates, or if our intellectual property rights are inadequate, our competitive position could be harmed.

Our commercial success will depend in part on our ability to obtain and maintain patent and other intellectual property protection in the United States and other countries with respect to our technology, Immulytic platform, RP1 and our other product candidates. We rely on trade secret, patent, copyright and trademark laws, and confidentiality, licensing and other agreements with

employees and third parties, all of which offer only limited protection. We seek to protect our proprietary position by filing and prosecuting patent applications in the United States and abroad related to our technology and product candidates.

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The patent positions of biotechnology and pharmaceutical companies generally are highly uncertain, involve complex legal and factual questions and have in recent years been the subject of much litigation. As a result, the issuance, scope, validity, enforceability and commercial value of our licensed patents and any patents we own in the future are highly uncertain. The steps we have taken to protect our proprietary rights may not be adequate to preclude misappropriation of our proprietary information or infringement of our intellectual property rights, both inside and outside of the United States.

Further, the examination process may require us to narrow the claims for our pending patent applications, which may limit the scope of patent protection that may be obtained if these applications issue. The scope of a patent may also be reinterpreted after issuance. The rights that may be granted under our future issued patents may not provide us with the proprietary protection or competitive advantages we are seeking. If we are unable to obtain and maintain patent protection for our technology or for RP1 or our other product candidates, or if the scope of the patent protection obtained is not sufficient, our competitors could develop and commercialize products similar or superior to ours, and our ability to successfully commercialize RP1 or our other product candidates and future technologies may be adversely affected. It is also possible that we will fail to identify patentable aspects of inventions made in the course of our development and commercialization activities before it is too late to obtain patent protection on them.

In addition, the patent prosecution process is expensive, time consuming and complex, and we may not be able to file, prosecute, maintain, enforce or license all necessary or desirable patent applications at a reasonable cost or in a timely manner. Although we enter into nondisclosure and confidentiality agreements with parties who have access to confidential or patentable aspects of our research and development output, such as our employees, collaborators, and other third parties, any of these parties may breach the agreements and disclose such output before a patent application is filed, thereby jeopardizing our ability to seek patent protection. It is also possible that we will fail to identify patentable aspects of our research and development efforts in time to obtain patent protection.

For the core technology in our Immulytic platform and each of our product candidates, we have filed five patent applications under the Patent Cooperation Treaty, or PCT, and four U.S. provisional applications. Four of these PCT applications have entered the national phase and are pending in a range of countries, and one is still in the international phase. None of our PCT-derived patent applications or U.S. provisional applications have been granted by a patent office. Early stage examination has started only in connection with the European national phase applications. Any future provisional patent applications are not eligible to become issued patents until, among other things, we file a non-provisional patent application within 12 months of filing of one or more of our related provisional patent applications. If we do not timely file any non-provisional patent applications, we may lose our priority date with respect to our provisional patent applications and any patent protection on the inventions disclosed in our provisional patent applications. Although we intend to timely file non-provisional patent applications relating to our provisional patent applications, we cannot predict whether any of our future patent applications will result in the issuance of patents that effectively protect our technology or RP1 or our other product candidates, or if any of our future issued patents will effectively prevent others from commercializing competitive products. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after filing or in some cases not at all until they are issued as a patent. Therefore, we cannot be certain that we were the first to make the inventions claimed in our pending patent applications, or that we were the first to file for patent protection of such inventions.

Our pending applications cannot be enforced against third parties practicing the inventions claimed in such applications unless and until a patent issues from such applications. Because the issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, issued patents that we license from third parties or own in the future may be challenged in the courts or patent offices in the United States and abroad, including through opposition proceedings, derivation proceedings, inter partes review, interference proceedings or litigation. Such proceedings may result in the loss of patent protection, the narrowing of claims in such patents or the invalidity or unenforceability of such patents, which could limit our ability to stop others from using or commercializing similar or identical products, or limit the duration of the patent protection for our technology. Protecting against the unauthorized use of our patented inventions, trademarks and other intellectual property rights is expensive, time consuming, difficult and in some cases may not be possible. In some cases, it may be difficult or impossible to detect third party infringement or misappropriation of our intellectual property rights, even in relation to issued patent claims, and proving any such infringement may be even more difficult. If we are unable to obtain, maintain, and protect our intellectual property our competitive advantage could be harmed, and it could result in a material adverse effect on our business, financial condition, results of operations, stock price and prospects.

If we are unable to protect the confidentiality of our proprietary information and know-how, the value of our technology and products could be adversely affected.

In addition to seeking patent protection, we also rely on other proprietary rights, including protection of trade secrets, know-how and confidential and proprietary information. To maintain the confidentiality of our trade secrets and proprietary information, we enter into confidentiality agreements with our employees, consultants, collaborators and other third parties who have access to our

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trade secrets. Our agreements with employees also provide that any inventions conceived by the individual in the course of rendering services to us shall be our exclusive property. However, we may not obtain these agreements in all circumstances, and individuals with whom we have these agreements may not comply with their terms. The assignment of intellectual property rights may not be self-executing or the assignment agreements may be breached, and we may be forced to bring claims against third parties, or defend claims that they may bring against us, to determine the ownership of what we regard as our intellectual property. In addition, in the event of unauthorized use or disclosure of our trade secrets or proprietary information, these agreements, even if obtained, may not provide meaningful protection, particularly for our trade secrets or other confidential information. To the extent that our employees, consultants or contractors use technology or know-how owned by third parties in their work for us, disputes may arise between us and those third parties as to the rights in related inventions.

Adequate remedies may not exist in the event of unauthorized use or disclosure of our confidential information including a breach of our confidentiality agreements. Enforcing a claim that a party illegally disclosed or misappropriated a trade secret is difficult, expensive, and time consuming, and the outcome is unpredictable. In addition, some courts in and outside of the United States are less willing or unwilling to protect trade secrets. If any of our trade secrets were to be lawfully obtained or independently developed by a competitor or other third party, we would have no right to prevent them from using that technology or information to compete with us. The disclosure of our trade secrets or the independent development of our trade secrets by a competitor or other third party would impair our competitive position and may materially harm our business, financial condition, results of operations, stock price and prospects.

Third parties may in the future initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain and could harm our business.

Our commercial success depends on our ability and the ability of our current or future collaborators to develop, manufacture, market and sell RP1 and our other product candidates, and to use our related proprietary technologies without infringing, misappropriating or otherwise violating the intellectual property and proprietary rights of third parties. The biotechnology and pharmaceutical industries are characterized by extensive litigation regarding patents and other intellectual property rights. We may become party to, or threatened with, adversarial proceedings or litigation regarding intellectual property rights with respect to our current and any other future product candidates, including interference proceedings, post-grant review, inter partes review and derivation proceedings before the U.S. Patent and Trademark Office, or USPTO. Third parties may assert infringement or other intellectual property claims against us based on existing patents or patents that may be granted in the future. If we are found to infringe a third party’s intellectual property rights, and we are unsuccessful in demonstrating that such intellectual property rights are invalid or unenforceable, we could be required to obtain a license from such third party to continue developing, manufacturing and commercializing RP1 and our other product candidates. However, we may not be able to obtain any required license on commercially reasonable terms or at all. Even if we were able to obtain a license, it could be nonexclusive, thereby giving our competitors and other third parties access to the same technologies licensed to us, and it could require us to make substantial licensing and royalty payments. We also could be forced, including by court order, to cease developing, manufacturing, and commercializing RP1 or our other product candidates. In addition, in any such proceeding or litigation, we could be found liable for significant monetary damages, including treble damages and attorneys’ fees, if we are found to have willfully infringed a patent or other intellectual property right. Any of the foregoing could have a material adverse effect on our business, financial condition, results of operations, stock price and prospects. Any claims by third parties that we have misappropriated their confidential information or trade secrets could have a similar material adverse effect on our business.

In addition, we are developing certain of our product candidates in combination with nivolumab and cemiplimab, which are covered by patents or licenses held by BMS and Regeneron, respectively, to which we do not have a license other than for use in connection with the applicable clinical trial. We also plan to develop our product candidates in combination with products developed by additional companies that are covered by patents or licenses held by those entities to which we do not have a license. In the event that a labeling instruction is required in product packaging recommending that combination, we could be accused of, or held liable for, infringement of the third party patents covering the product candidate or product recommended for administration with RP1 or our other product candidates. In such a case, we could be required to obtain a license from the other company or institution to use the required or desired package labeling, which may not be available on commercially reasonable terms, or at all.

We may not be able to protect our intellectual property and proprietary rights throughout the world.

Filing, prosecuting and defending patents on our technology in all countries throughout the world would be prohibitively expensive, and our intellectual property rights in some countries outside the United States can be less extensive than those in the United States. In addition, the laws and practices of some foreign countries do not protect intellectual property rights to the same extent as federal and state laws in the United States. Consequently, we may not be able to prevent third parties from practicing our

inventions in all countries outside the United States, or from selling or importing products made using our inventions in and into the United States or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop and/or manufacture their own products and may export otherwise infringing products to territories where we

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have patent protection but where enforcement is not as strong as that in the United States. These products may compete with our products and our patent claims or other intellectual property rights may not be effective or sufficient to prevent them from so competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in certain foreign jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the granting or enforcement of patents, trade secrets and other intellectual property protection, particularly those relating to biopharmaceuticals, which could make it difficult for us to obtain patent rights or stop the infringement of our patents or marketing of competing products in violation of our intellectual property and proprietary rights generally in those countries. Proceedings to enforce our intellectual property and proprietary rights in foreign jurisdictions could result in substantial cost and divert our efforts and attention from other aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to protect and enforce our intellectual property and proprietary rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property we develop or license.

In addition, the laws of certain foreign countries may not protect our rights to the same extent as the laws of the United States, and those foreign laws may also be subject to change. For example, methods of treatment and manufacturing processes may not be patentable in certain jurisdictions, and the requirements for patentability may differ in certain countries. Furthermore, biosimilar product manufacturers or other competitors may challenge the scope, validity and enforceability of our patents, requiring us to engage in complex, lengthy and costly litigation or proceedings.

Moreover, many countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to third parties. Many countries limit the enforceability of patents against government agencies or government contractors. In these countries, the patent owner may have limited remedies, which could materially diminish the value of such patent. If we are forced to grant a license to third parties with respect to any patents relevant to our business, our competitive position may be impaired and our business and results of operations may be adversely affected.

Obtaining and maintaining patent protection depends on compliance with various procedural, document submission, fee payment and other requirements imposed by governmental patent agencies, and our patent protection could be reduced or eliminated for noncompliance with these requirements.

The USPTO and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payments and other similar provisions during the patent application process and to maintain patents after they are issued. For example, periodic maintenance fees, renewal fees, annuity fees and various other government fees on issued patents and patent applications often must be paid to the USPTO and foreign patent agencies over the lifetime of our licensed patents or any patents we own in the future. In certain circumstances, we may rely on future licensing partners to take the necessary action to comply with these requirements with respect to licensed intellectual property. Although an unintentional lapse can be cured for a period of time by payment of a late fee or by other means in accordance with the applicable rules, there are situations in which noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. Noncompliance events that could result in abandonment or lapse of a patent or patent application include, but are not limited to, failure to respond to official actions within prescribed time limits, nonpayment of fees and failure to properly legalize and submit formal documents. If we fail to obtain and maintain the patents and patent applications covering our products or procedures, we may not be able to stop a competitor from marketing products that are the same as or similar to RP1 or our other product candidates, which could have a material adverse effect on our business.

Changes to the patent law in the United States and other jurisdictions could diminish the value of patents in general, thereby impairing our ability to protect RP1 and our other product candidates.

As is the case with other biopharmaceutical companies, our success is heavily dependent on intellectual property, particularly patents. Obtaining and enforcing patents in the biopharmaceutical industry involves both technological and legal complexity and is therefore costly, time consuming and inherently uncertain. Changes in either the patent laws or interpretation of the patent laws in the United States could increase the uncertainties and costs. Patent reform legislation in the United States and other countries, including the Leahy-Smith America Invents Act, or the Leahy-Smith Act, signed into law on September 16, 2011, could increase those uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents. The Leahy-Smith Act includes a number of significant changes to U.S. patent law. These include provisions that affect the way patent applications are prosecuted, redefine prior art and provide more efficient and cost effective avenues for competitors to challenge the validity of patents. These include allowing third party submission of prior art to the USPTO during patent prosecution and additional procedures to attack the validity of a patent by USPTO administered post-grant proceedings, including post-grant review, inter partes review, and derivation proceedings. After March 2013, under the Leahy-Smith Act, the United States transitioned to a first inventor to

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file system in which, assuming that the other statutory requirements are met, the first inventor to file a patent application will be entitled to the patent on an invention regardless of whether a third party was the first to invent the claimed invention. However, the Leahy-Smith Act and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could have a material adverse effect on our business, financial condition, results of operations, stock price and prospects.

The U.S. Supreme Court has ruled on several patent cases in recent years, either narrowing the scope of patent protection available in certain circumstances or weakening the rights of patent owners in certain situations. Depending on future actions by the U.S. Congress, the U.S. courts, the USPTO and the relevant lawmaking bodies in other countries, the laws and regulations governing patents could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce our existing patents and patents that we might obtain in the future.

We may become involved in lawsuits to protect or enforce our intellectual property, which could be expensive, time consuming and unsuccessful and have a material adverse effect on the success of our business.

Competitors may infringe any future licensed patents or any patent we own in the future or misappropriate or otherwise violate our intellectual property rights. We may also be required to defend against claims of infringement and our licensed patents and any patents we own in the future may become involved in priority or other intellectual property related disputes. To counter infringement or unauthorized use, litigation may be necessary in the future to enforce or defend our intellectual property rights, to protect our trade secrets or to determine the validity and scope of our own intellectual property rights or the proprietary rights of others. Also, third parties may initiate legal proceedings against us to assert that we are infringing their intellectual property rights or to challenge the validity or scope of our owned or licensed intellectual property rights. These proceedings can be expensive and time consuming. Many of our current and potential competitors have the ability to dedicate substantially greater resources to conduct intellectual property related litigations or proceedings than we can. We may not have sufficient financial or other resources to conduct such litigation or proceedings adequately. Accordingly, despite our efforts, we may not be able to prevent third parties from infringing upon or misappropriating our intellectual property. Litigation and other intellectual property related proceedings could result in substantial costs and diversion of management resources, which could harm our business and financial results. In addition, in an infringement proceeding, a court may decide that a patent owned by or licensed to us is invalid or unenforceable, or may refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation or other intellectual property related proceeding could put one or more of our patents at risk of being invalidated, held unenforceable or interpreted narrowly.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation in the United States, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. There could also be public announcements of the results of hearings, motions or other interim proceedings or developments in any such proceedings. If securities analysts or investors perceive these results to be negative, it could have a material adverse effect on the price of shares of our common stock. Any of the foregoing may have a material adverse effect our business, financial condition, results of operations, stock price and prospects.

We may be subject to claims by third parties asserting that our collaborators, employees or we have misappropriated their intellectual property, or claiming ownership of what we regard as our own intellectual property.

Many of our employees, including our senior management team, were previously employed at, or consulted for, universities or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Our collaborators’ employees may currently be or previously have been employed at universities or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Some of these persons, including each member of our senior management team, executed proprietary rights, nondisclosure and noncompetition agreements, or similar agreements, in connection with such previous employment or consulting agreements, that assigned ownership of intellectual property relating to work performed under such agreements to the contracting third party. Although we take steps to ensure that our employees do not use, claim as theirs, or misappropriate the intellectual property, proprietary information or know-how of others in their work for us, we may be subject to claims that we or these employees have used, claimed as theirs, misappropriated or disclosed intellectual property, including trade secrets or other proprietary information, of any such individual’s current or former employer. Litigation may be necessary to defend against such claims. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel or sustain damages. Such intellectual property rights could be awarded to a third party, and we could be required to obtain a license from such third party to commercialize our technology or products. Such a license may not be available on commercially reasonable terms, or at all. Even if we are successful in defending against such claims, litigation could

result in substantial costs and be a distraction to management. Any of the foregoing may have a material adverse effect on our business, financial condition, results of operations, stock price and prospects.

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We may be subject to damages resulting from claims that we or our employees have wrongfully used or disclosed confidential information of third parties or are in breach of noncompetition or nonsolicitation agreements with our competitors.

We could be subject to claims that we or our employees, including senior management, have inadvertently or otherwise used or disclosed alleged trade secrets or other confidential information of former employers or competitors or others. Although we take steps to ensure that our employees and consultants do not use the intellectual property, proprietary information, know-how or trade secrets of others in their work for us, we may be subject to claims that we caused an employee to breach the terms of their noncompetition or nonsolicitation agreement, or that we or these individuals have, inadvertently or otherwise, used or disclosed the alleged trade secrets or other proprietary information of a former employer or competitor or other party. Litigation may be necessary to defend against these claims. Even if we are successful in defending against these claims, litigation could result in substantial costs and could be a distraction to management. If our defenses to these claims fail, in addition to requiring us to pay monetary damages, a court could prohibit us from using technologies or features that are essential to RP1 and our other product candidates, if such technologies or features are found to incorporate or be derived from the trade secrets or other proprietary information of the former employers, competitors or other parties. An inability to incorporate such technologies or features would have a material adverse effect on our business, and may prevent us from successfully commercializing RP1 and our other product candidates. In addition, we may lose valuable intellectual property rights or personnel as a result of such claims. Moreover, any such litigation or the threat thereof may adversely affect our ability to hire employees or consultants. A loss of key personnel or their work product could hamper or prevent our ability to develop and commercialize RP1 and our other product candidates, which could have an adverse effect on our business, financial condition, results of operations, stock price and prospects.

If we obtain any issued patents covering our technology, such patents could be found invalid or unenforceable if challenged in court or before the USPTO or comparable foreign regulatory authority.

If we or one of our licensing partners initiate legal proceedings against a third party to enforce a patent covering any of our technology, the defendant could counterclaim that the patent covering our product candidate is invalid or unenforceable. In patent litigation in the United States, defendant counterclaims alleging invalidity or unenforceability are commonplace, and there are numerous grounds upon which a third party can assert invalidity or unenforceability of a patent. Grounds for a validity challenge could be, among other things, an alleged failure to meet any of several statutory requirements, including lack of novelty, obviousness, or non-enablement. Grounds for an unenforceability assertion could be, among other things, an allegation that someone connected with prosecution of the patent withheld relevant information from the USPTO, or made a misleading statement, during prosecution. Third parties may also raise similar claims before administrative bodies in the United States or abroad, even outside the context of litigation. Such mechanisms include reexamination, inter partes review, post-grant review, interference proceedings, derivation proceedings and equivalent proceedings in foreign jurisdictions, such as opposition proceedings. Such proceedings could result in revocation, cancellation or amendment of our patents in such a way that they no longer cover and protect RP1 and our other product candidates. The outcome following legal assertions of invalidity and unenforceability is unpredictable. For example, with respect to the validity of our licensed patents or any patents we obtain in the future, we cannot be certain that there is no invalidating prior art of which we, our or our licensing partners’ patent counsel, and the patent examiner were unaware during prosecution. If a third party were to prevail on a legal assertion of invalidity and/or unenforceability, we would lose at least part, and perhaps all, of the patent protection on RP1 and our other product candidates. Such a loss of patent protection could have a material adverse impact on our business.

Patent terms may be inadequate to protect our competitive position on our products for an adequate amount of time, and our product candidates for which we intend to seek approval as biological products may face competition sooner than anticipated.

Given the amount of time required for the development, testing and regulatory review of new product candidates, such as RP1 and our other product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. In the United States, the Drug Price Competition and Patent Term Restoration Act of 1984 permits a patent term extension of up to five years beyond the normal expiration of the patent, but no longer than 14 years from the product’s approval date, which is limited to the approved indication (or any additional indications approved during the period of extension). However, the applicable authorities, including the FDA and the USPTO in the United States, and any equivalent regulatory authorities in other countries, may not agree with our assessment of whether such extensions are available, and may refuse to grant extensions to our patents, or may grant more limited extensions than we request. If this occurs, our competitors may be able to take advantage of our investment in development and clinical trials by referencing our clinical and preclinical data and launch their products earlier than might otherwise be the case, which could have a material adverse effect on our business, financial condition, results of operations, stock price and prospects.

The enactment of the Biologics Price Competition and Innovation Act of 2009, or BPCIA, as part of the Patient Protection and Affordable Care Act, or ACA, created an abbreviated pathway for the approval of biosimilar and interchangeable biological products. The abbreviated regulatory pathway establishes legal authority for the FDA to review and approve biosimilar biologics,

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including the possible designation of a biosimilar as “interchangeable” based on its similarity to an existing brand product. Under the BPCIA, an application for a biosimilar product cannot be approved by the FDA until 12 years after the original branded product was approved under a BLA. Certain changes, however, and supplements to an approved BLA, and subsequent applications filed by the same sponsor, manufacturer, licensor, predecessor in interest, or other related entity do not qualify for the 12 year exclusivity period.

RP1 and our other product candidates are all biological product candidates. We anticipate being awarded market exclusivity for each of our biological product candidates that is subject to its own BLA for 12 years in the United States, 10 years in Europe and significant durations in other markets. However, the term of the patents that cover such product candidates may not extend beyond the applicable market exclusivity awarded by a particular country. For example, in the United States, if all of the patents that cover our particular biological product expire before the 12 year market exclusivity expires, a third party could submit a marketing application for a biosimilar product four years after approval of our biological product, the FDA could immediately review the application and approve the biosimilar product for marketing 12 years after approval of our biological product, and the biosimilar sponsor could then immediately begin marketing. Alternatively, a third party could submit a full BLA for a similar or identical product any time after approval of our biological product, and the FDA could immediately review and approve the similar or identical product for marketing and the third party could begin marketing the similar or identical product upon expiry of all of the patents that cover our particular biological product.

There is also a risk that this exclusivity could be changed in the future. For example, this exclusivity could be shortened due to congressional action or through other actions, including future proposed budgets, international trade agreements and other arrangements or proposals. Additionally, there is a risk that the FDA will not consider our product candidates to be reference products for competing products, potentially creating the opportunity for biosimilar competition sooner than anticipated. The extent to which a biosimilar, once approved, will be substituted for any one of our reference products in a way that is similar to traditional generic substitution for non-biological products is not yet clear, and will depend on a number of marketplace and regulatory factors that are still developing. It is also possible that payers will give reimbursement preference to biosimilars over reference biologics, even absent a determination of interchangeability.

To the extent that we do not receive any anticipated periods of regulatory exclusivity for our product candidates or the FDA or foreign regulatory authorities approve any biosimilar, interchangeable, or other competing products to our product candidates, it could have a material adverse effect on our business, financial condition, results of operations, stock price and prospects.

Risks related to manufacturing and our reliance on third parties

We have agreements with BMS and Regeneron, and in the future may have agreements with other companies, to obtain the supply of anti-PD-1 therapies for the development of our other product candidates. If our relationships with BMS, Regeneron, or any future collaborator or supplier are not successful, we may be delayed in completing the development of our other product candidates.

We have entered into arrangements with BMS and Regeneron as part of our clinical development for RP1 and RP2. BMS is providing nivolumab, its anti-PD-1 therapy, for use in our ongoing Phase 1/2 clinical trials with RP1 and RP2 and Regeneron is providing cemiplimab, its anti-PD-1 therapy, for use in our randomized, controlled Phase 2 clinical trial with RP1 in approximately 240 patients with CSCC and may potentially do so for other clinical trials in the future. We may also enter into agreements with additional companies for the supply of anti-PD-1 therapies for use in the development of RP1 and our other product candidates. The outcome of these clinical trials is dependent both on the performance of our partners’ products and product candidates and also on our partners’ ability to deliver sufficient quantities of adequately produced product. Should any of our partners’ products or product candidates fail to produce the results that we anticipate, we may have to rerun clinical trials for RP1 or our other product candidates or may otherwise be delayed in the commercialization of RP1 or our other product candidates. Similarly, should any partner fail to provide us with a product or product candidate that suits our requirements we may have to re-run clinical trials for RP1 or our other product candidates or may be otherwise delayed in the commercialization of RP1 or our other product candidates.

Our collaboration agreements with any future partners may not be successful, which could adversely affect our ability to develop and commercialize our product candidates.

We may in the future seek collaboration arrangements with other parties for the development or commercialization of our product candidates. The success of any collaboration arrangements may depend on the efforts and activities of our collaborators. Collaborators generally have significant discretion in determining the efforts and resources that they will apply to these arrangements. Disagreements between parties to a collaboration arrangement regarding clinical development and commercialization matters can lead to delays in the development process or commercializing the applicable product candidate and, in some cases, termination of the collaboration arrangement. These disagreements can be difficult to resolve if neither of the parties has final decision making authority.

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Collaborations with biopharmaceutical companies and other third parties often are terminated or allowed to expire by the other party. Any such termination or expiration could adversely affect us financially and could harm our business reputation.

Any future collaborations we might enter into may pose a number of risks, including the following:

·collaborators may not perform their obligations as expected;

·collaborators may not pursue development and commercialization of any product candidates that achieve regulatory approval or may elect not to continue or renew development or commercialization programs based on clinical trial results, changes in the collaborators’ strategic focus or available funding, or external factors, such as an acquisition, that divert resources or create competing priorities;

·collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial or abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a product candidate for clinical testing;

·collaborators could fail to make timely regulatory submissions for a product candidate;

·collaborators may not comply with all applicable regulatory requirements or may fail to report safety data in accordance with all applicable regulatory requirements, which could subject them or us to regulatory enforcement actions;

·collaborators could independently develop, or develop with third parties, products that compete directly or indirectly with our products or product candidates if the collaborators believe that competitive products are more likely to be successfully developed or can be commercialized under terms that are more economically attractive than ours;

·product candidates discovered in collaboration with us may be viewed by our collaborators as competitive with their own product candidates or products, which may cause collaborators to cease to devote resources to the commercialization of our product candidates;

·a collaborator with marketing and distribution rights to one or more of our product candidates that achieve regulatory approval may not commit sufficient resources to the marketing and distribution of such product candidate or product;

·disagreements with collaborators, including disagreements over proprietary rights, contract interpretation or the preferred course of development, might cause delays or termination of the research, development or commercialization of product candidates, might lead to additional responsibilities for us with respect to product candidates, or might result in litigation or arbitration, any of which would be time consuming and expensive;

·collaborators may not properly maintain or defend our intellectual property rights or may use our proprietary information in such a way as to invite litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential litigation; and

·collaborators may infringe the intellectual property rights of third parties, which may expose us to litigation and potential liability.

If any collaborations we might enter into in the future do not result in the successful development and commercialization of products or if one of our collaborators subsequently terminates its agreement with us, we may not receive any future research funding or milestone or royalty payments under such potential future collaboration. If we do not receive the funding we expect under the agreements, our development of our product candidates could be delayed and we may need additional resources to develop our product candidates and our product platform.

Additionally, if any future collaborator of ours is involved in a business combination, the collaborator might deemphasize or terminate development or commercialization of any product candidate it licenses to us. If one of our collaborators terminates its agreement with us, we may find it more difficult to attract new collaborators and our reputation in the business and financial communities could be adversely affected.

We face significant competition in seeking appropriate collaborators. Our ability to reach a definitive agreement for any collaboration will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation of a number of factors.

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If we are unable to reach agreements with suitable collaborators on a timely basis, on acceptable terms, or at all, we may have to curtail the development of a product candidate, reduce or delay its development program or one or more of our other development programs, delay its potential commercialization or reduce the scope of any sales or marketing activities, or increase our expenditures and undertake development or commercialization activities at our own expense. If we elect to fund and undertake development or commercialization activities on our own, we may need to obtain additional expertise and additional capital, which may not be available to us on acceptable terms, or at all. If we fail to enter into collaborations and do not have sufficient funds or expertise to undertake the necessary development and commercialization activities, we may not be able to further develop our product candidates or bring them to market or continue to develop our product platform and our business may be materially and adversely affected.

We rely, and expect to continue to rely, on third parties to conduct, supervise, and monitor our preclinical studies and clinical trials. If those third parties do not perform satisfactorily, including failing to meet deadlines for the completion of such trials or failing to comply with regulatory requirements, we may be unable to obtain regulatory approval for our product candidates or any other product candidates that we may develop in the future.

We rely on third party CROs, study sites, and others to conduct, supervise, and monitor our preclinical studies and clinical trials for our product candidates and do not currently plan to independently conduct preclinical studies or clinical trials of any other potential product candidates. We expect to continue to rely on third parties, such as CROs, clinical data management organizations, medical institutions, and clinical investigators, to conduct our preclinical studies and clinical trials. Although we have agreements governing their activities, we have limited influence over their actual performance and control only certain aspects of their activities. The failure of these third parties to successfully carry out their contractual duties or meet expected deadlines could substantially harm our business because we may be delayed in completing or unable to complete the studies required to support future approval of our product candidates, or we may not obtain marketing approval for or commercialize our product candidates in a timely manner or at all. Moreover, these agreements might terminate for a variety of reasons, including a failure to perform by the third parties. If we need to enter into alternative arrangements our product development activities would be delayed and our business, financial condition, results of operations, stock price and prospects may be materially harmed.

Our reliance on these third parties for development activities will reduce our control over these activities. Nevertheless, we are responsible for ensuring that each of our studies is conducted in accordance with the applicable protocol, legal, regulatory, and scientific standards and our reliance on third parties does not relieve us of our regulatory responsibilities. For example, we will remain responsible for ensuring that each of our trials is conducted in accordance with the general investigational plan and protocols for the trial. We must also ensure that our preclinical trials are conducted in accordance with the FDA’s Good Laboratory Practice, or GLP, regulations, as appropriate. Moreover, the FDA and comparable foreign regulatory authorities require us to comply with standards, commonly referred to as GCPs for conducting, recording, and reporting the results of clinical trials to assure that data and reported results are credible and accurate and that the rights, integrity, and confidentiality of trial participants are protected. Regulatory authorities enforce these requirements through periodic inspections of trial sponsors, clinical investigators, and trial sites. If we or any of our third parties fail to comply with applicable GCPs or other regulatory requirements, we or they may be subject to enforcement or other legal actions, the data generated in our trials may be deemed unreliable and the FDA or comparable foreign regulatory authorities may require us to perform additional studies.

In addition, we will be required to report certain financial interests of our third party investigators if these relationships exceed certain financial thresholds or meet other criteria. The FDA or comparable foreign regulatory authorities may question the integrity of the data from those clinical trials conducted by investigators who may have conflicts of interest.

We cannot assure you that upon inspection by a given regulatory authority, such regulatory authority will determine that any of our trials complies with the applicable regulatory requirements. In addition, our clinical trials must be conducted with product candidates that were produced under cGMP regulations. Failure to comply with these regulations may require us to repeat clinical trials, which would delay the regulatory approval process. We also are required to register certain clinical trials and post the results of certain completed clinical trials on a government sponsored database, ClinicalTrials.gov, within specified timeframes. Failure to do so can result in enforcement actions and adverse publicity.

The third parties with which we work may also have relationships with other entities, some of which may be our competitors, for whom they may also be conducting trials or other therapeutic development activities that could harm our competitive position. In addition, such third parties are not our employees, and except for remedies available to us under our agreements with such third parties we cannot control whether or not they devote sufficient time and resources to our ongoing clinical, nonclinical, and preclinical programs. If these third parties do not successfully carry out their contractual duties, meet expected deadlines or conduct our preclinical studies or clinical trials in accordance with regulatory requirements or our stated protocols, if they need to be replaced or if

the quality or accuracy of the data they obtain is compromised due to the failure to adhere to our protocols, regulatory requirements or for other reasons, our trials may be repeated, extended, delayed, or terminated; we may not be able to obtain, or may be delayed in obtaining, marketing approvals for our product candidates; we may not be able to, or may be delayed in our efforts to, successfully commercialize our product candidates, or we or they may be subject to regulatory enforcement actions. As a result, our results of

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operations and the commercial prospects for our product candidates would be harmed, our costs could increase and our ability to generate revenues could be delayed. To the extent we are unable to successfully identify and manage the performance of third party service providers in the future, our business, financial condition, results of operations, stock price and prospects may be materially harmed.

If any of our relationships with these third parties terminate, we may not be able to enter into arrangements with alternative providers or to do so on commercially reasonable terms. Switching or adding additional third parties involves additional cost and requires management time and focus. In addition, there is a natural transition period when a new third party commences work. As a result, delays could occur, which could compromise our ability to meet our desired development timelines.

We also rely on other third parties to store and distribute our products for the clinical trials that we conduct. Any performance failure on the part of our distributors could delay clinical development, marketing approval, or commercialization of our product candidates, which could result in additional losses and deprive us of potential product revenue.

If the manufacturers upon which we rely fail to produce our product candidates in the volumes that we require on a timely basis, or fail to comply with stringent regulations applicable to biopharmaceutical manufacturers, we may face delays in the development and commercialization of, or be unable to meet demand for, our product candidates and may lose potential revenues.

Until our manufacturing facility is fully operational and for period of time thereafter, we will rely on third party contract manufacturers to manufacture our clinical trial product supplies. There can be no assurance that our clinical development will not be limited, interrupted, or of satisfactory quality or continue to be available at acceptable prices. In particular, any replacement of our contract manufacturer could require significant effort and expertise because there may be a limited number of qualified replacements. Any delays in obtaining adequate supplies of our product candidates that meet the necessary quality standards may delay our development or commercialization.

We may not succeed in our efforts to establish manufacturing relationships or other alternative arrangements for any of our product candidates or programs. Our product candidates may compete with other products and product candidates for access to manufacturing facilities. There are a limited number of manufacturers that operate under cGMP regulations and that are both capable of manufacturing and filling our viral product for us and willing to do so. If our existing third party manufacturers, or the third parties that we engage in the future, should cease to work with us, we likely would experience delays in obtaining sufficient quantities of our product candidates for us to meet commercial demand or to advance our clinical trials while we identify and qualify replacement suppliers. If for any reason we are unable to obtain adequate supplies of our product candidates or the therapeutic substances used to manufacture them, it will be more difficult for us to develop our product candidates and compete effectively. Further, even if we do establish such collaborations or arrangements, our third party manufacturers may breach, terminate, or not renew these agreements.

Any problems or delays we experience in preparing for commercial scale manufacturing of a product candidate or component may result in a delay in product development timelines and FDA or comparable foreign regulatory authority approval of the product candidate or may impair our ability to manufacture commercial quantities or such quantities at an acceptable cost and quality, which could result in the delay, prevention, or impairment of clinical development and commercialization of our product candidates and may materially harm our business, financial condition, results of operations, stock price and prospects.

We currently have only one contract manufacturer for our product candidates for use in our clinical trials. In addition, we do not have any long term commitments from our suppliers of clinical trial material or guaranteed prices for our product candidates or their components. The manufacture of biopharmaceutical products requires significant expertise and capital investment, including the development of advanced manufacturing techniques and process controls. Manufacturers of therapeutics often encounter difficulties in production, particularly in scaling up initial production. These problems include difficulties with production costs and yields, quality control, including stability of the product candidate and quality assurance testing, shortages of qualified personnel or key raw materials, and compliance with strictly enforced federal, state, and foreign regulations. Our contract manufacturers may not perform as agreed. If our manufacturers were to encounter these or other difficulties, our ability to provide product candidates to patients in our clinical trials could be jeopardized.

Contract manufacturers of our product candidates may be unable to comply with our specifications, applicable cGMP requirements or other FDA, state or foreign regulatory requirements. Poor control of production processes can lead to the introduction of adventitious agents or other contaminants, or to inadvertent changes in the properties or stability of a product candidate that may not be detectable in final product testing. If our contract manufacturers cannot successfully manufacture material that conforms to our specifications and the strict regulatory requirements of the FDA or other regulatory authorities, they will not be able to secure or

maintain regulatory approval for their manufacturing facilities. Any such deviations may also require remedial measures that may be costly and/or time consuming for us or a third party to implement and that may include the temporary or permanent suspension of a clinical trial or the temporary or permanent closure of a facility. Any such remedial measures imposed upon us or third parties with whom we contract could materially harm our business. Any delays in obtaining products or product candidates that comply with the

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applicable regulatory requirements may result in delays to clinical trials, product approvals, and commercialization. It may also require that we conduct additional studies.

While we are ultimately responsible for the manufacturing of our product candidates and therapeutic substances, other than through our contractual arrangements, we have little control over our manufacturers’ compliance with these regulations and standards. If the FDA or a comparable foreign regulatory authority does not approve these facilities for the manufacture of our product candidates or if it withdraws any such approval in the future, we may need to find alternative manufacturing facilities, which would significantly impact our ability to develop, obtain regulatory approval for or market our product candidates, if approved. Any new manufacturers would need to either obtain or develop the necessary manufacturing know-how, and obtain the necessary equipment and materials, which may take substantial time and investment. We must also receive FDA approval for the use of any new manufacturers for commercial supply.

A failure to comply with the applicable regulatory requirements, including periodic regulatory inspections, may result in regulatory enforcement actions against our manufacturers or us (including fines and civil and criminal penalties, including imprisonment) suspension or restrictions of production, injunctions, delay or denial of product approval or supplements to approved products, clinical holds or termination of clinical trials, warning or untitled letters, regulatory authority communications warning the public about safety issues with the product candidate, refusal to permit the import or export of the products, product seizure, detention, or recall, operating restrictions, suits under the civil False Claims Act, corporate integrity agreements, consent decrees, withdrawal of product approval, environmental or safety incidents and other liabilities. If the safety of any quantities supplied is compromised due to our manufacturers’ failure to adhere to applicable laws or for other reasons, we may not be able to obtain regulatory approval for or successfully commercialize our product candidates.

Any failure or refusal to supply our product candidates or components for our product candidates that we may develop could delay, prevent or impair our clinical development or commercialization efforts. Any change in our manufacturers could be costly because the commercial terms of any new arrangement could be less favorable and because the expenses relating to the transfer of necessary technology and processes could be significant.

The transition of our manufacturing operations to our new facility may result in further delays or expenses, and we may not experience the anticipated operating efficiencies.

We have completed the build-out of, and obtained an occupancy certificate with respect to, our approximately 63,000 square foot manufacturing facility in Framingham, Massachusetts at which we intend operate our own manufacturing facility in order to secure supplies for pivotal studies and commercial launch. This facility is intended to give us control over key aspects of the supply chain for our products and product candidates. We may not experience the anticipated operating efficiencies as we commence manufacturing operations at the new facility. Any such delays may disrupt or delay the supply of our product candidates if we have not maintained a sufficient backup supply of our product candidates through third party manufacturers. Moreover, changing manufacturing facilities may also require that we conduct additional studies, make notifications to the regulatory authorities, make additional filings to the regulatory authorities, and obtain regulatory authority approval for the new facilities, which may be delayed or which we may never receive. We will further need to comply with the FDA’s and applicable foreign regulatory authorities’ cGMP requirements for the production of our product candidates for clinical trials and, if approved, commercial supply, and will be subject to FDA and comparable foreign regulatory authority inspection. These requirements include the qualification and validation of our manufacturing equipment and processes. We may not be able to develop or acquire the internal expertise and resources necessary for compliance with these requirements. If we fail to achieve the operating efficiencies that we anticipate, our manufacturing and operating costs may be greater than expected, which could have a material adverse impact on our operating results.

In operating our own manufacturing facility, we may be forced to devote greater resources and management time than anticipated, particularly in areas relating to operations, quality, regulatory, facilities and information technology. If we experience unanticipated employee turnover in any of these areas, we may not be able to effectively manage our ongoing manufacturing operations and we may not achieve the operating efficiencies that we anticipate from the new facility, which may negatively affect our product development timeline.

Any such problems could result in the delay, prevention, or impairment of clinical development and commercialization of our product candidates and may materially harm our business, financial condition, results of operations, stock price and prospects.

Risks related to legal and compliance matters

We face potential product liability exposure, and if successful claims are brought against us, we may incur substantial liability and have to limit the commercialization of any approved products and/or our product candidates.

The use of our product candidates in clinical trials, and the sale of any product for which we obtain regulatory approval, exposes us to the risk of product liability claims. We face inherent risk of product liability related to the testing of our product

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candidates in human clinical trials, including liability relating to the actions and negligence of our investigators, and will face an even greater risk if we commercially sell any product candidates that we may develop. For example, we may be sued if any product candidate we develop allegedly causes injury or is found to be otherwise unsuitable during clinical testing, manufacturing, marketing or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability or a breach of warranties. Claims could also be asserted under state consumer protection acts. Product liability claims might be brought against us by consumers, healthcare providers or others using, administering or selling our products. If we cannot successfully defend ourselves against these claims, we will incur substantial liabilities or be required to limit commercialization of our product candidates. Even successful defense would require significant financial and management resources. Regardless of merit or eventual outcome, liability claims may result in:

·loss of revenue from decreased demand for our products and/or product candidates;

·impairment of our business reputation or financial stability;

·costs of related litigation;

·substantial monetary awards to patients or other claimants;

·diversion of management attention;

·withdrawal of clinical trial participants and potential termination of clinical trial sites or entire clinical programs;

·the inability to commercialize our product candidates;

·significant negative media attention;

·decreases in our stock price;

·initiation of investigations and enforcement actions by regulators; and

·product recalls, withdrawals or labeling, marketing or promotional restrictions, including withdrawal of marketing approval.

We believe we have sufficient insurance coverage in place for our business operations. However, our insurance coverage may not reimburse us or may not be sufficient to reimburse us for any expenses or losses we may suffer. Moreover, insurance coverage is becoming increasingly expensive, and, in the future, we may not be able to maintain insurance coverage at a reasonable cost or in sufficient amounts to protect us against losses due to liability. We intend to expand our insurance coverage to include the sale of commercial products if we obtain FDA or comparable foreign regulatory approval for our product candidates in development, but we may be unable to obtain commercially reasonable product liability insurance for any products approved for marketing, or at all. Failure to obtain and retain sufficient product liability insurance at an acceptable cost could prevent or inhibit the commercialization of products we develop. On occasion, large judgments have been awarded in class action lawsuits based on therapeutics that had unanticipated side effects. A successful product liability claim or series of claims brought against us could cause our stock price to fall and, if judgments exceed our insurance coverage, could decrease our cash, and materially harm our business, financial condition, results of operations, stock price and prospects.

We are subject to the U.S. Foreign Corrupt Practices Act, the U.K. Bribery Act and other anticorruption laws, as well as import and export control laws, customs laws, sanctions laws and other laws governing our operations. If we fail to comply with these laws, we could be subject to civil or criminal penalties, other remedial measures, and legal expenses, which could adversely affect our business, financial condition, results of operations, stock price and prospects.

Our operations are subject to anticorruption laws, including the U.S. Foreign Corrupt Practices Act, or FCPA, the U.K. Bribery Act 2010, or the Bribery Act, and other anticorruption laws that apply in countries where we do business. The FCPA, the Bribery Act, and these other laws generally prohibit us and our employees and intermediaries from bribing, being bribed or making other prohibited payments to government officials or other persons to obtain or retain business or gain some other business advantage. We also may participate in collaborations and relationships with third parties whose actions, if noncompliant, could potentially subject us to liability under the FCPA, Bribery Act or local anticorruption laws. In addition, we cannot predict the nature, scope or effect of future regulatory requirements to which our international operations might be subject or the manner in which existing laws might be administered or interpreted.

We are also subject to other laws and regulations governing our international operations, including regulations administered by the governments of the United States and the United Kingdom and authorities in the European Union, including applicable import

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and export control regulations, economic sanctions on countries and persons, anti-money laundering laws, customs requirements and currency exchange regulations, collectively referred to as the trade control laws.

We can provide no assurance that we will be completely effective in ensuring our compliance with all applicable anticorruption laws or other legal requirements, including trade control laws. If we are not in compliance with applicable anticorruption laws or trade control laws, we may be subject to criminal and civil penalties, disgorgement and other sanctions and remedial measures, and legal expenses, which could have an adverse impact on our business, financial condition, results of operations, stock price and prospects. Likewise, any investigation of any potential violations of these anticorruption laws or trade control laws by U.S., U.K. or other authorities could also have an adverse impact on our reputation, our business, financial condition, results of operations, stock price and prospects.

If we fail to comply with federal and state healthcare laws, including fraud and abuse and health and other information privacy and security laws, we could face substantial penalties and our business, financial condition, results of operations, stock price and prospects will be materially harmed.

We are subject to many federal and state healthcare laws, such as the federal Anti-Kickback Statute, the federal civil and criminal False Claims Acts, the civil monetary penalties statute, the Medicaid Drug Rebate statute and other price reporting requirements, the Veterans Health Care Act of 1992, or VHCA, the federal Health Insurance Portability and Accountability Act of 1996 (as amended by the Health Information Technology for Economics and Clinical Health Act, or HITECH), or HIPAA, the FCPA, the ACA, and similar state laws. Even though we do not and will not control referrals of healthcare services or bill directly to Medicare, Medicaid or other third party payors, certain federal and state healthcare laws, and regulations pertaining to fraud and abuse, reimbursement programs, government procurement, and patients’ rights are and will be applicable to our business. We would be subject to healthcare fraud and abuse and patient privacy regulation by both the federal government and the states and foreign jurisdictions in which we conduct our business. In the European Union, the data privacy laws are generally stricter than those that apply in the United States and include specific requirements for the collection of personal data of European Union persons or the transfer of personal data outside of the European Union to the United States to ensure that European Union standards of data privacy will be applied to such data.

If we or our operations are found to be in violation of any federal or state healthcare law, or any other governmental laws or regulations that apply to us, we may be subject to penalties, including civil, criminal, and administrative penalties, damages, fines, disgorgement, suspension and debarment from government contracts, and refusal of orders under existing government contracts, exclusion from participation in U.S. federal or state health care programs, corporate integrity agreements, and the curtailment or restructuring of our operations, any of which could materially adversely affect our ability to operate our business and our financial results. If any of the physicians or other healthcare providers or entities with whom we expect to do business is found not to be in compliance with applicable laws, it may be subject to criminal, civil or administrative sanctions, including but not limited to, exclusions from participation in government healthcare programs, which could also materially affect our business.

Although an effective compliance program can mitigate the risk of investigation and prosecution for violations of these laws, the risks cannot be entirely eliminated. Moreover, achieving and sustaining compliance with applicable federal, state and foreign privacy, data protection, security, reimbursement, and fraud laws may prove costly. Any action against us for violation of these laws, even if we successfully defend against it, could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business.

If the government or third party payors fail to provide adequate coverage, reimbursement and payment rates for our product candidates, or if health maintenance organizations or long-term care facilities choose to use therapies that are less expensive or considered a better value, our revenue and prospects for profitability will be limited.

In both domestic and foreign markets, sales of our products will depend in part upon the availability of coverage and reimbursement from third party payors. Such third party payors include government health programs such as Medicare and Medicaid, managed care providers, private health insurers, and other organizations. Coverage decisions may depend upon clinical and economic standards that disfavor new therapeutic products when more established or lower cost therapeutic alternatives are already available or subsequently become available, even if our products are alone in a class. If reimbursement is not available, or is available only to limited levels, our product candidates may be competitively disadvantaged, and we may not be able to successfully commercialize our product candidates. Even if coverage is provided, the approved reimbursement amount may not be high enough to allow us to establish or maintain a market share sufficient to realize a sufficient return on our or their investments. Alternatively, securing favorable reimbursement terms may require us to compromise pricing and prevent us from realizing an adequate margin over cost.

There is significant uncertainty related to third party payor coverage and reimbursement of newly approved therapeutics. Marketing approvals, pricing, and reimbursement for new therapeutic products vary widely from country to country. Current and future legislation may significantly change the approval requirements in ways that could involve additional costs and cause delays in

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obtaining approvals. Some countries require approval of the sale price of a therapeutic before it can be marketed. In many countries, the pricing review period begins after marketing or product licensing approval is granted. In some foreign markets, prescription biopharmaceutical pricing remains subject to continuing governmental control even after initial approval is granted. As a result, we might obtain marketing approval for a product in a particular country, but then be subject to price regulations that delay commercial launch of the product, possibly for lengthy time periods, which may negatively impact the revenues we are able to generate from the sale of the product in that country. Adverse pricing limitations may hinder our ability to recoup our investment in one or more product candidates, even if our product candidates obtain marketing approval. Our ability to commercialize our product candidates will depend in part on the extent to which coverage and reimbursement for these products and related treatments will be available from government health administration authorities, private health insurers and other organizations. Regulatory authorities and third party payors, such as private health insurers, and health maintenance organizations, decide which medications they will cover and establish reimbursement levels. The healthcare industry is acutely focused on cost containment, both in the United States and elsewhere. Several third party payors are requiring that companies provide them with predetermined discounts from list prices, are using preferred drug lists to leverage greater discounts in competitive classes, are disregarding therapeutic differentiators within classes, are challenging the prices charged for therapeutics, and are negotiating price concessions based on performance goals.

Third-party payors, whether foreign or domestic, or governmental or commercial, are developing increasingly sophisticated methods of controlling healthcare costs. In addition, in the United States, no uniform policy of coverage and reimbursement for products exists among third party payors. Therefore, coverage and reimbursement for products can differ significantly from payor to payor. Further, we believe that future coverage and reimbursement will likely be subject to increased restrictions both in the United States and in international markets. Third-party coverage and reimbursement for our products or product candidates for which we receive regulatory approval may not be available or adequate in either the United States or international markets, which could have a negative effect on our business, financial condition, results of operations, stock price and prospects.

Assuming coverage is approved, the resulting reimbursement payment rates might not be adequate. If payors subject our product candidates to maximum payment amounts, or impose limitations that make it difficult to obtain reimbursement, providers may choose to use therapies which are less expensive when compared to our product candidates. Additionally, if payors require high copayments, beneficiaries may seek alternative therapies. We may need to conduct postmarketing studies in order to demonstrate the cost effectiveness of any products to the satisfaction of hospitals, other target customers and their third party payors. Such studies might require us to commit a significant amount of management time and financial and other resources. Our products might not ultimately be considered cost effective. Adequate third party coverage and reimbursement might not be available to enable us to maintain price levels sufficient to realize an appropriate return on investment in product development.

In addition, federal programs impose penalties on manufacturers of therapeutics in the form of mandatory additional rebates and/or discounts if commercial prices increase at a rate greater than the Consumer Price Index Urban, and these rebates and/or discounts, which can be substantial, may impact our ability to raise commercial prices. A few states have also passed or are considering legislation intended to prevent significant price increases. Regulatory authorities and third party payors have attempted to control costs by limiting coverage and the amount of reimbursement for particular medications, which could affect our ability to sell our product candidates profitably. These payors may not view our products, if any, as cost effective, and coverage and reimbursement may not be available to our customers, or may not be sufficient to allow our products, if any, to be marketed on a competitive basis. Cost control initiatives could cause us to decrease, discount, or rebate a portion of the price we, or they, might establish for products, which could result in lower than anticipated product revenues. If the realized prices for our products, if any, decrease or if governmental and other third party payors do not provide adequate coverage or reimbursement, our prospects for revenue and profitability will suffer.

There may also be delays in obtaining coverage and reimbursement for newly approved therapeutics, and coverage may be more limited than the indications for which the product is approved by the FDA or comparable foreign regulatory authorities. Such delays have made it increasingly common for manufacturers to provide newly approved drugs to patients experiencing coverage delays or disruption at no cost for a limited period in order to ensure that patients are able to access the drug. Moreover, eligibility for reimbursement does not imply that any therapeutic will be paid for in all cases or at a rate that covers our costs, including research, development, manufacture, sale, and distribution. Interim reimbursement levels for new therapeutics, if applicable, may also not be sufficient to cover our costs and may only be temporary. Reimbursement rates may vary, by way of example, according to the use of the product and the clinical setting in which it is used. Reimbursement rates may also be based on reimbursement levels already set for lower cost products or may be incorporated into existing payments for other services.

In addition, third party payors are increasingly requiring higher levels of evidence of the benefits and clinical outcomes of new technologies, benchmarking against other therapies, seeking performance-based discounts, and challenging the prices charged. We cannot be sure that coverage will be available for any product candidate that we commercialize and, if available, that the reimbursement rates will be adequate. An inability to promptly obtain coverage and adequate payment rates from both government-funded and private payors for any of our product candidates for which we obtain marketing approval could have a material adverse effect on our operating results, our ability to raise capital needed to commercialize products and our overall financial condition.

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We are subject to new legislation, regulatory proposals and healthcare payor initiatives that may increase our costs of compliance, and adversely affect our ability to market our products, obtain collaborators, and raise capital.

In the United States and some foreign jurisdictions, there have been a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to profitably sell any products for which we obtain marketing approval. We expect that current laws, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional downward pressure on the price that we may receive for any approved products.

For example, legislative changes have been proposed and adopted since the ACA was enacted in 2010. These changes include, among other things, aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, which went effective on April 1, 2013. In addition, the American Taxpayer Relief Act of 2012, among other things, further reduced Medicare payments to several providers and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. The Centers for Medicare and Medicaid Services, or CMS, promulgated regulations governing manufacturers’ obligations and reimbursement under the Medicaid Drug Rebate Program, and recently promulgated a regulation that limited Medicare Part B payment to certain hospitals for outpatient drugs purchased under the 340B program. These new laws may result in additional reductions in Medicare and other healthcare funding, which could have a material adverse effect on customers for our products, if approved, and, accordingly, on our results of operations.

We expect that the ACA, as well as other federal and state healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria, increased regulatory burdens and operating costs, decreased net revenue from our biopharmaceutical products, decreased potential returns from our development efforts, and additional downward pressure on the price that we receive for any approved product. Any reduction in reimbursement from Medicare or other government healthcare programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from commercializing our products and being able to generate revenue, and we could be prevented from or significantly delayed in achieving profitability.

In addition, there have been a number of other legislative and regulatory proposals aimed at changing the biopharmaceutical industry. For instance, the Drug Quality and Security Act imposes obligations on manufacturers of biopharmaceutical products related to product tracking and tracing. Among the requirements of this legislation, manufacturers are required to provide certain information regarding the product to individuals and entities to which product ownership is transferred, will be required to label products with a product identifier, and are required to keep certain records regarding the product. The transfer of information to subsequent product owners by manufacturers is also required to be done electronically. Manufacturers are also being required to verify that purchasers of the manufacturers’ products are appropriately licensed. Further, manufactures have product investigation, quarantine, disposition, and FDA, other comparable foreign regulatory authorities, and trading partner notification responsibilities related to counterfeit, diverted, stolen, and intentionally adulterated products that would result in serious adverse health consequences of death to humans, as well as products that are the subject of fraudulent transactions or which are otherwise unfit for distribution such that they would be reasonably likely to result in serious health consequences or death.

Compliance with the federal track and trace requirements may increase our operational expenses and impose significant administrative burdens. As a result of these and other new proposals, we may determine to change our current manner of operation, provide additional benefits or change our contract arrangements, any of which could have a material adverse effect on our business, financial condition, results of operations, stock price and prospects.

Our employees, independent contractors, consultants, commercial partners, principal investigators, CMOs, or CROs may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements, which could have a material adverse effect on our business.

We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees, independent contractors, consultants, commercial partners, principal investigators, CMOs, or CROs could include intentional, reckless, negligent, or unintentional failures to comply with FDA regulations, comply with applicable fraud and abuse laws, provide accurate information to the FDA, properly calculate pricing information required by federal programs, report financial information or data accurately or disclose unauthorized activities to us. This misconduct could also involve the improper use or misrepresentation of information obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to our reputation. It is not always possible to identify and deter this type of misconduct, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. Moreover, it is possible for a whistleblower to pursue a False Claims Act case against us even if the government considers the claim unmeritorious and declines to intervene, which could require us to incur costs defending against such a claim. If any such actions are instituted against us, and we are not successful

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in defending ourselves or asserting our rights, those actions could have a significant impact on our business, financial condition, results of operations, stock price and prospects, including the imposition of significant fines or other sanctions.

Violations of or liabilities under environmental, health and safety laws and regulations could subject us to fines, penalties or other costs that could have a material adverse effect on the success of our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures, the handling, use, storage, treatment and disposal of hazardous materials and wastes and the cleanup of contaminated sites. Our operations involve the use of hazardous and flammable materials, including chemicals and biological and radioactive materials. Our operations also produce hazardous waste products. We would incur substantial costs as a result of violations of or liabilities under environmental requirements in connection with our operations or property, including fines, penalties and other sanctions, investigation and cleanup costs and third party claims. Although we generally contract with third parties for the disposal of hazardous materials and wastes from our operations, we cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting from our use of hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil or criminal fines and penalties.

Although we maintain workers’ compensation insurance to cover costs and expenses, we may incur due to injuries to our employees resulting from the use of hazardous materials, this insurance may not provide adequate coverage against potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive materials.

Our internal computer systems, or those of our third party CROs or other contractors or consultants, may fail or suffer security breaches, which could result in a material disruption of our development programs.

Our internal computer systems, and those of our CROs, CMOs, information technology suppliers and other contractors and consultants are vulnerable to damage from computer viruses, cyber-attacks and other unauthorized access, natural disasters, terrorism, war, and telecommunication and electrical failures. If such an event were to occur and cause interruptions in our operations, it could result in a material disruption of our development programs. For example, the loss of clinical trial data from completed, ongoing or planned clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. To the extent that any disruption or security breach were to result in a loss of or damage to our data or applications, or inappropriate disclosure of personal, confidential or proprietary information, we could incur liability and the further development of any of our product candidates could be delayed.

Risks related to our operations

We will need to expand the size of our organization, and we may experience difficulties in managing this growth, which could disrupt our operations.

As of December 31, 2019, we had 104 fulltime employees, including 89 employees engaged in research and development. As our development and commercialization plans and strategies develop, we expect to need additional managerial, operational, sales, marketing, financial and other personnel. Future growth would impose significant added responsibilities on members of management, including:

·identifying, recruiting, integrating, maintaining and motivating additional employees;

·managing our internal development efforts effectively, including the clinical, FDA and comparable foreign regulatory review process for our product candidates, while complying with our contractual obligations to contractors and other third parties; and

·strengthening our operational, financial and management controls, reporting systems and procedures.

Our future financial performance and our ability to commercialize RP1 and our other product candidates will depend, in part, on our ability to effectively manage any future growth, and our management may also have to divert a disproportionate amount of its attention away from day-to-day activities in order to devote a substantial amount of time to managing these growth activities.

We currently rely, and for the foreseeable future will continue to rely, in substantial part on certain independent organizations, advisors and consultants to provide certain services. The services include substantially all aspects of clinical trial management and manufacturing, as well as support for our financial reporting and accounting functions. We cannot assure you that the services of independent organizations, advisors and consultants will continue to be available to us on a timely basis when needed, or that we can find qualified replacements. In addition, if we are unable to effectively manage our outsourced activities or if the quality or accuracy of the services provided by consultants is compromised for any reason, our clinical trials may be extended, delayed

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or terminated, we may not comply with our financial reporting and accounting obligations on a timely basis and we may not be able to obtain marketing approval of RP1 and our other product candidates or otherwise advance our business. We cannot assure you that we will be able to manage our existing consultants or find other competent outside contractors and consultants on economically reasonable terms, or at all.

If we are not able to effectively expand our organization by hiring qualified new employees and expanding our groups of consultants and contractors, we may not be able to successfully implement the tasks necessary to further develop and commercialize RP1 and our other product candidates and, accordingly, may not achieve our research, development and commercialization goals.

We are highly dependent on our key personnel, including Robert Coffin, Ph.D., our President and Chief Research & Development Officer; Philip Astley-Sparke, our Chief Executive Officer; and Colin Love, Ph.D., our Chief Operating Officer. If we are not successful in attracting, motivating and retaining highly qualified personnel, we may not be able to successfully implement our business strategy.

Our ability to compete in the highly competitive biotechnology and pharmaceutical industries depends upon our ability to attract, motivate and retain highly qualified managerial, scientific and medical personnel. We are highly dependent on our management and particularly on the services of our founders, as well as our other scientific, manufacturing, quality and medical personnel. Robert Coffin, Ph.D., our President and Chief Research & Development Officer, Philip Astley-Sparke, our Chief Executive Officer, and Colin Love, Ph.D., our Chief Operating Officer, were the founder and senior management team of BioVex Group, Inc., or BioVex, where they invented and developed T-VEC, the only oncolytic immunotherapy to receive FDA approval. BioVex was acquired by Amgen Inc., or Amgen, in 2011. We believe that their drug discovery and development experience, and overall biopharmaceutical company management experience, would be difficult to replace. The loss of the services of our key personnel and any of our other executive officers, key employees, and scientific and medical advisors, and our inability to find suitable replacements, could result in delays in product development and harm our business. Furthermore, the historical results, past performance and/or acquisitions of companies with which our founders were affiliated, including BioVex, do not necessarily predict or guarantee similar results for our company.

We conduct our operations at our facilities near Boston, Massachusetts and near Oxford, England, each of which are in regions that are home to many other biopharmaceutical companies and many academic and research institutions.

Competition for skilled personnel is intense and the turnover rate can be high, which may limit our ability to hire and retain highly qualified personnel on acceptable terms or at all. We expect that we will need to recruit talent from outside of these regions, and doing so may be costly and difficult.

To induce valuable employees to remain at our company, in addition to salary and cash incentives, we have provided stock option grants that vest over time. The value to employees of these equity grants that vest over time may be significantly affected by movements in our stock price that are beyond our control, and may at any time be insufficient to counteract more lucrative offers from other companies. Although we have employment agreements with our key employees, these employment agreements generally provide for at-will employment, which means that any of our employees could leave our employment at any time, with or without notice. We do not maintain “key man” insurance policies on the lives of any of these individuals or the lives of any of our other employees.

We have identified material weaknesses in our internal control over financial reporting. If we are unable to remediate these material weaknesses, or if we identify additional material weaknesses in the future or otherwise fail to maintain an effective system of internal controls, we may not be able to accurately or timely report our financial condition or results of operations, which may adversely affect our business.

In connection with the audits of our consolidated financial statements as of and for the years ended March 31, 2019, 2018 and 2017, we identified material weaknesses in our internal control over financial reporting. A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis. If we are unable to remediate these material weaknesses, or if we identify additional material weaknesses in the future or otherwise fail to maintain an effective system of internal controls, we may not be able to accurately or timely report our financial condition or results of operations,which may adversely affect investor confidence in us and, as a result, our stock price and ability to access the capital markets in the future.

The material weaknesses we identified were as follows:

·We did not design or maintain an effective control environment commensurate with our financial reporting requirements. We lacked a sufficient number of professionals with an appropriate level of accounting knowledge, training and experience to appropriately analyze, record and disclose accounting matters timely and accurately. Additionally, the

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limited personnel resulted in our inability to consistently establish appropriate authorities and responsibilities in pursuit of our financial reporting objectives, as demonstrated by, among other things, our insufficient segregation of duties in our accounting function. This material weakness further contributed to the material weakness below.

·We did not design and maintain formal accounting policies, processes and controls to analyze, account for and disclose complex transactions, including accounting for preferred stock, stock-based compensation, warrant liabilities and leases.

Each of these control deficiencies could result in a misstatement of our accounts or disclosures that would result in a material misstatement of our annual or interim consolidated financial statements that would not be prevented or detected, and accordingly, we determined that these control deficiencies constitute material weaknesses.

These material weaknesses also resulted in adjustments to preferred stock, stock compensation expense, warrant liability and deferred rent in our consolidated financial statements as of and for the year ended March 31, 2017, which were recorded prior to their issuance.

Prior to the completion of our IPO, we were a private company with limited accounting personnel to adequately execute our accounting processes and other supervisory resources with which to address our internal control over financial reporting. We have implemented, and continue to implement, measures designed to improve our internal control over financial reporting and remediate the control deficiencies that led to these material weaknesses. To date, we have hired Jean Franchi, our first Chief Financial Officer, and additional finance and accounting personnel and have engaged a third party consulting firm to assist us in the design and documentation of appropriate controls. We are continuing these efforts in order to design and implement our financial control environment, including the establishment of controls to account for and disclose complex transactions.

We cannot assure you that the measures we have taken to date, and actions we intend to take in the future, will be sufficient to remediate the control deficiencies that led to these material weaknesses in our internal control over financial reporting or that they will prevent or avoid potential future material weaknesses. In addition, neither our management nor an independent registered public accounting firm has performed an evaluation of our internal control over financial reporting in accordance with the provisions of the Sarbanes-Oxley Act because no such evaluation has been required. Had we or our independent registered public accounting firm performed an evaluation of our internal control over financial reporting in accordance with the provisions of the Sarbanes-Oxley Act, additional material weaknesses may have been identified. If we are unable to successfully remediate our existing or any future material weaknesses in our internal control over financial reporting, or identify any additional material weaknesses, the accuracy and timing of our financial reporting may be adversely affected, potentially resulting in restatements of our financial statements, we may be unable to maintain compliance with securities law requirements regarding timely filing of periodic reports and applicable Nasdaq listing requirements, investors may lose confidence in our financial reporting, and our share price may decline as a result.

If we fail to establish and maintain proper and effective internal controls over financial reporting our ability to produce accurate and timely financial statements could be impaired.

We are required to maintain internal controls over financial reporting. Commencing with our fiscal year ending March 31, 2020, we must perform system and process design evaluation and testing of the effectiveness of our internal controls over financial reporting to allow management to report on the effectiveness of our internal controls over financial reporting in our Annual Report on Form 10-K filing for that year, as required by Section 404 of the Sarbanes-Oxley Act. This will require that we incur substantial additional professional fees and internal costs to expand our accounting and finance functions and that we expend significant management efforts. Prior to our IPO, we were not required to test our internal controls within a specified period and, as a result, we may experience difficulty in meeting these reporting requirements in a timely manner.

If we are not able to comply with the requirements of Section 404 of the Sarbanes-Oxley Act in a timely manner, if our independent registered public accounting firm determines that we continue to have a material weakness or significant deficiency in our internal control over financial reporting, or if we are unable to maintain proper and effective internal controls over financial reporting, we may not be able to produce timely and accurate financial statements. If that were to happen, our investors could lose confidence in our reported financial information, the market price of our stock could decline and we could be subject to sanctions or investigations by the SEC, Nasdaq or other regulatory authorities.

We believe that any internal controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. We may discover weaknesses in our system of internal financial and accounting controls and procedures that could result in a material misstatement of our consolidated financial statements. Our internal control over financial reporting will not prevent or detect all errors and all fraud. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud will be detected.

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These inherent limitations include the realities that judgments in decision making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by an unauthorized override of the controls. Accordingly, because of the inherent limitations in our control system, misstatements due to error or fraud may occur and not be detected.

Our disclosure controls and procedures were not effective as of March 31, 2019, and in any event may not prevent or detect all errors or acts of fraud.

We must design our disclosure controls and procedures to reasonably assure that information we must disclose in reports we file or submit under the Exchange Act is accumulated and communicated to management, and recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC. Based on the evaluation of our disclosure controls and procedures as of December 31, 2019, we concluded that, as of December 2019, our disclosure controls and procedures were not effective at the reasonable assurance level as a result of the material weaknesses discussed above. Notwithstanding these material weaknesses, our management has concluded that the financial statements included elsewhere in this Quarterly Report present fairly, in all material respects, our financial position, results of operations and cash flows in conformity with generally accepted accounting principles. We believe that any disclosure controls and procedures or internal controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. These inherent limitations include the realities that judgments in decision making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by an unauthorized override of the controls. Accordingly, because of the inherent limitations in our control system, misstatements due to error or fraud may occur and not be detected.

If we engage in future acquisitions or strategic partnerships, this may increase our capital requirements, dilute our stockholders, cause us to incur debt or assume contingent liabilities, and subject us to other risks.

We may evaluate various acquisitions and strategic partnerships, including licensing or acquiring complementary products, intellectual property rights, technologies, or businesses. Any potential acquisition or strategic partnership may entail numerous risks, including:

·increased operating expenses and cash requirements;

·the assumption of additional indebtedness or contingent liabilities;

·the issuance of our equity securities;

·assimilation of operations, intellectual property and products of an acquired company, including difficulties associated with integrating new personnel;

·the diversion of our management’s attention from our existing product programs and initiatives in pursuing such a strategic merger or acquisition;

·retention of key employees, the loss of key personnel, and uncertainties in our ability to maintain key business relationships;

·risks and uncertainties associated with the other party to such a transaction, including the prospects of that party, their regulatory compliance status, and their existing products or product candidates and marketing approvals; and

·our inability to generate revenue from acquired technology and/or products sufficient to meet our objectives in undertaking the acquisition or even to offset the associated acquisition and maintenance costs.

In addition, if we undertake acquisitions, we may issue dilutive securities, assume or incur debt obligations, incur large onetime expenses and acquire intangible assets that could result in significant future amortization expense or intangible asset impairment charges. Moreover, we may not be able to locate suitable acquisition opportunities and this inability could impair our ability to grow or obtain access to technology or products that may be important to the development of our business. Any of the foregoing may materially harm our business, financial condition, results of operations, stock price and prospects.

Unfavorable market and economic conditions may have serious adverse consequences on our business, financial condition, results of operations, stock price and prospects.

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Our results of operations could be adversely affected by general conditions in the global economy and in the global financial markets. The most recent global financial crisis caused extreme volatility and disruptions in the capital and credit markets. A severe or prolonged economic downturn could result in a variety of risks to our business, including a reduced ability to raise additional capital when needed on acceptable terms, if at all. A weak or declining economy could also strain our suppliers, possibly resulting in supply disruption. Any of the foregoing could harm our business and we cannot anticipate all of the ways in which the economic climate and financial market conditions could adversely impact our business.

At December 31, 2019, we had $180.9 million of cash and cash equivalents and short term investments. Although we are not aware of any downgrades, material losses, or other significant deterioration in the fair value of our cash equivalents or short term investments since that date, we cannot assure you that deterioration of the global credit and financial markets would not negatively impact our current portfolio of cash equivalents or short term investments, or our ability to meet our financing objectives. Furthermore, our stock price may decline due, in part, to the volatility of the stock market and general economic downturns.

Exchange rate fluctuations may materially affect our results of operations and financial conditions.

Owing to the international scope of our operations, fluctuations in exchange rates, particularly between the U.S. dollar and the British pound and the euro, may adversely affect us. Although we are based in the United States, we have significant research and development operations in the United Kingdom, and source third party manufacturing, consulting and other services in the United Kingdom and the European Union. As a result, our business and the price of our common stock may be affected by fluctuations in foreign exchange rates, which may have a significant impact on our results of operations and cash flows from period to period. Currently, we do not have any exchange rate hedging arrangements in place.

Risks related to our common stock

An active trading market for our common stock may not be sustained.

Our common stock began trading on the Nasdaq Global Select Market on July 19, 2018. Given the limited trading history of our common stock, there is a risk that an active trading market for shares of our common stock may not be sustained. In the absence of an active trading market for shares of our common stock, our stockholders may not be able to sell their common stock at or above the price at which such stockholder acquired our common stock or at the time that they would like to sell.

The price of our common stock may be volatile and fluctuate substantially, which could result in substantial losses for purchasers of our common stock.

Our stock price has been and is likely to be volatile. The stock market in general and the market for biopharmaceutical companies in particular have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. As a result of this volatility, you may not be able to sell your common stock at or above the price at which it was acquired. The market price for our common stock may be influenced by many factors, including:

·the success of competitive products or technologies;

·results of clinical trials of RP1 and our other product candidates or those of our competitors;

·regulatory or legal developments in the United States and other countries;

·developments or disputes concerning patent applications, issued patents or other proprietary rights;

·the recruitment or departure of key personnel;

·the level of expenses related to the development of RP1 and our other product candidates or clinical development programs;

·the results of our efforts to discover, develop, acquire or in-license additional product candidates or drugs;

·actual or anticipated changes in estimates as to financial results, development timelines or recommendations by securities analysts;

·variations in our financial results or those of companies that are perceived to be similar to us;

·changes in the structure of healthcare payment systems;

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·market conditions in the pharmaceutical and biotechnology sectors;

·general economic, industry and market conditions; and

·the other factors described in this “Risk factors” section.

Our operating results may fluctuate significantly, which makes our future operating results difficult to predict and could cause our operating results to fall below expectations or our guidance.

Our quarterly and annual operating results may fluctuate significantly in the future, which makes it difficult for us to predict our future operating results. From time to time, we may enter into license or collaboration agreements with other companies that include development funding and significant upfront and milestone payments and/or royalties, which may become an important source of our revenue. Accordingly, our revenue may depend on development funding and the achievement of development and clinical milestones under current and any potential future license and collaboration agreements and sales of our products, if approved. These upfront and milestone payments may vary significantly from period to period and any such variance could cause a significant fluctuation in our operating results from one period to the next.

In addition, we measure compensation cost for stock-based awards made to employees at the grant date of the award, based on the fair value of the award as determined by our board of directors, and recognize the cost as an expense over the employee’s requisite service period. As the variables that we use as a basis for valuing these awards change over time, including, our underlying stock price and stock price volatility, the magnitude of the expense that we must recognize may vary significantly.

Furthermore, our operating results may fluctuate due to a variety of other factors, many of which are outside of our control and may be difficult to predict, including the following:

·timing and cost of, and level of investment in, research and development activities relating to our current and any future product candidates, which will change from time to time;

·the total expenses we incur in connection with equipping, and operating our manufacturing facility and the actual timing of the facility becoming fully operational;

·our ability to enroll patients in clinical trials and the timing of enrollment;

·the cost of manufacturing our current and any future product candidates, which may vary depending on the FDA’s and comparable foreign regulatory authorities’ guidelines and requirements, the quantity of production and the terms of any agreements with manufacturers;

·expenditures that we will or may incur to acquire or develop additional product candidates and technologies;

·the timing and outcomes of clinical and preclinical studies for RP1 and our other product candidates or competing product candidates;

·competition from existing and potential future products that compete with RP1 and our other product candidates, and changes in the competitive landscape of our industry, including consolidation among our competitors or partners;

·any delays in regulatory review or approval of RP1 or our other product candidates;

·the level of demand for RP1 and our other product candidates, if approved, which may fluctuate significantly and be difficult to predict;

·the risk/benefit profile, cost and reimbursement policies with respect to our product candidates, if approved, and existing and potential future products that compete with RP1 and our other product candidates;

·our ability to commercialize RP1 and our other product candidates, if approved, inside and outside of the United States, either independently or working with third parties;

·the success of and our ability to establish and maintain collaborations, licensing or other arrangements;

·our ability to adequately support future growth;

·potential unforeseen business disruptions that increase our costs or expenses;

·future accounting pronouncements or changes in our accounting policies; and

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·the changing and volatile global economic environment.

These factors could result in large fluctuations and unpredictability in our quarterly and annual operating results. As a result, comparing our operating results on a period-to-period basis may not be meaningful. Investors should not rely on our past results as an indication of our future performance.

This variability and unpredictability could also result in our failing to meet the expectations of industry or financial analysts or investors for any period. If our revenue or operating results fall below the expectations of analysts or investors or below any forecasts we may provide to the market, or if the forecasts we provide to the market are below the expectations of analysts or investors, the price of our common stock could decline substantially. Such a stock price decline could occur even when we have met any previously publicly stated revenue and/or earnings guidance we may provide.

We have broad discretion in how we use our cash, cash equivalents and investments, and may not use these resources effectively, which could affect our results of operations and cause our stock price to decline.

Our management has considerable discretion in the application of our cash, cash equivalents and investments. We intend to use our resources to fund our preclinical and clinical development programs as well as for general corporate purposes, including working capital requirements and other operating expenses. As a result, investors will be relying upon management’s judgment with only limited information about our specific intentions for the use of our resources. We may use our resources for purposes that do not yield a significant return or any return at all for our stockholders. In addition, pending their use, we may invest our cash, cash equivalents and investments in a manner that does not produce income or that loses value.

We do not intend to pay dividends on our common stock so any returns will be limited to the value of our stock.

We currently anticipate that we will retain future earnings for the development, operation and expansion of our business and do not anticipate declaring or paying any cash dividends for the foreseeable future. Any return to stockholders will therefore be limited to the appreciation of their stock, which may never occur, as the only way to realize any return on their investment.

Our executive officers, directors, and stockholders and their affiliates who beneficially own more than 5% of our common stock exercise significant influence over our company, which limits your ability to influence corporate matters and could delay or prevent a change in corporate control.

Based on the number of shares outstanding as of December 31, 2019, our executive officers, directors, holders of 5% or more of our capital stock and their respective affiliates beneficially owned a significant portion of our voting stock and, accordingly, these stockholders will continue to have significant influence over matters requiring stockholder approval. For example, these stockholders will continue to significantly influence elections of directors, amendments of our organizational documents, or approval of any merger, sale of assets, or other major corporate transaction. This may prevent or discourage unsolicited acquisition proposals or offers for our common stock that you may feel are in your best interest as one of our stockholders.

Conflicts of interest may arise because some members of our board of directors are representatives of our principal stockholders.

Certain of our principal stockholders or their affiliates are venture capital funds or other investment vehicles that could invest in entities that directly or indirectly compete with us. As a result of these relationships, when conflicts arise between the interests of the principal stockholders or their affiliates and the interests of other stockholders, members of our board of directors that are representatives of the principal stockholders may not be disinterested. Neither the principal stockholders nor the representatives of the principal stockholders on our board of directors, by the terms of our amended and restated certificate of incorporation, are required to offer us any transaction opportunity of which they become aware and could take any such opportunity for themselves or offer it to their other affiliates, unless such opportunity is expressly offered to them solely in their capacity as members of our board of directors.

Sales of a substantial number of shares of our common stock in the public market could cause our stock price to fall.

If our existing stockholders sell, or indicate an intention to sell, substantial amounts of our common stock in the public market after the expiration of contractual or legal restrictions on resale lapse, the market price of our common stock could decline. These sales may make it more difficult for us to sell equity or equity related securities in the future at a time and price that we deem appropriate, or to use equity as consideration for future acquisition.

In addition, approximately 10.1 million shares of common stock that are either subject to outstanding options, reserved for future issuance under our equity incentive plans or subject to outstanding warrants are eligible for sale in the public market to the extent permitted by the provisions of various vesting schedules and Rule 144 and Rule 701 under the Securities Act. If these additional

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shares of common stock are sold, or if it is perceived that they will be sold, in the public market, the market price of our common stock could decline.

Certain holders of shares of our common stock, or their permitted transferees, are entitled to rights with respect to the registration under the Securities Act of approximately 19.2 million shares of our common stock pursuant to the amended and restated investors’ rights agreement by and among us and certain of our stockholders. Registration of these shares under the Securities Act would result in the shares becoming freely tradable without restriction under the Securities Act, except for shares purchased by affiliates. Any sales of securities by these stockholders could have a material adverse effect on the market price of our common stock.

We incur significantly increased costs as a result of operating as a public company, and our management is required to devote substantial time to compliance initiatives.

As a public company, we incur significant legal, accounting and other expenses. We are subject to the reporting requirements of the Exchange Act, which requires, among other things, that we file with the SEC annual, quarterly and current reports with respect to our business and financial condition. In addition, the Sarbanes-Oxley Act, and related SEC and Nasdaq rules impose significant requirements on public companies, including requiring establishment and maintenance of effective disclosure and financial controls and changes in corporate governance practices. Further, in July 2010, the Dodd-Frank Wall Street Reform and Consumer Protection Act, or the Dodd-Frank Act, was enacted. There are significant corporate governance and executive compensation-related provisions in the Dodd-Frank Act that require the SEC to adopt additional rules and regulations in these areas such as “say on pay” and proxy access. Recent legislation permits emerging growth companies to implement many of these requirements over a longer period and up to five years from the pricing of our IPO. We intend to take advantage of this new legislation, but cannot guarantee that we will not be required to implement these requirements sooner than budgeted or planned and thereby incur unexpected expenses. Stockholder activism, the current political environment and the current high level of government intervention and regulatory reform may lead to substantial new regulations and disclosure obligations, which may lead to additional compliance costs and impact the manner in which we operate our business in ways we cannot currently anticipate.

The rules and regulations applicable to public companies have substantially increased our legal and financial compliance costs and have made some activities more time consuming and costly. If these requirements divert the attention of our management and personnel from other business concerns, they could have a material adverse effect on our business, financial condition, results of operations, stock price and prospects. The increased costs will decrease our net income or increase our net loss and may require us to reduce costs in other areas of our business. For example, these rules and regulations have made it more difficult and more expensive for us to obtain director and officer liability insurance and we may be required to incur substantial costs to maintain the same or similar coverage. The impact of these requirements could also make it more difficult for us to attract and retain qualified persons to serve on our board of directors, our board committees or as executive officers.

If securities analysts do not publish research or reports about our business or if they publish negative evaluations of our stock, the price of our stock could decline.

The trading market for our common stock relies, in part, on the research and reports that industry or financial analysts publish about us or our business. If one or more of the analysts covering our business downgrade their evaluations of our stock, the price of our stock could decline. If one or more of these analysts cease to cover our stock, we could lose visibility in the market for our stock, which, in turn, could cause our stock price to decline.

Antitakeover provisions in our charter documents and under Delaware law could make an acquisition of our company, which may be beneficial to our stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management.

Provisions in our certificate of incorporation and amended and restated bylaws may delay or prevent an acquisition of our company or a change in our management. These provisions include a classified board of directors and the ability of our board of directors to issue preferred stock without stockholder approval. In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, or DGCL, which limits the ability of stockholders owning in excess of 15% of our outstanding voting stock to merge or combine with our company. Although we believe these provisions collectively provide for an opportunity to obtain greater value for stockholders by requiring potential acquirers to negotiate with our board of directors, they would apply even if an offer rejected by our board of directors were considered beneficial by some stockholders. In addition, these provisions may frustrate or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for our stockholders to replace members of our board of directors, which is responsible for appointing the members of our management.

We are an emerging growth company, and we cannot be certain if the reduced reporting requirements applicable to emerging growth companies will make our common stock less attractive to investors.

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We are an emerging growth company. For as long as we continue to be an emerging growth company, we may take advantage of exemptions from various reporting requirements applicable to other public companies that are not emerging growth companies, including not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act and critical audit matters reporting, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements and exemptions from the requirements of holding nonbinding advisory votes on executive compensation and stockholder approval of any golden parachute payments not previously approved. We could be an emerging growth company for up to five years following the year in which we completed our IPO, although circumstances could cause us to lose that status earlier. We will remain an emerging growth company until the earlier of (1) March 31, 2024, (2) the last day of the fiscal year (a) in which we have total annual gross revenue of at least $1.07 billion or (b) in which we are deemed to be a large accelerated filer, which requires the market value of our common stock that is held by non-affiliates to exceed $700.0 million as of the prior September 30th, and (3) the date on which we have issued more than $1.0 billion in nonconvertible debt during the prior three year period.

Even after we no longer qualify as an emerging growth company, we may still qualify as a “smaller reporting company” which would allow us to take advantage of many of the same exemptions from disclosure requirements including reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements. We cannot predict if investors will find our common stock less attractive because we may rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our stock price may be more volatile.

Under the Jumpstart Our Business Startups Act of 2012, emerging growth companies can also delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have irrevocably elected not to avail ourselves of this exemption from new or revised accounting standards and, therefore, will be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies. As a result, changes in rules of U.S. generally accepted accounting principles or their interpretation, the adoption of new guidance or the application of existing guidance to changes in our business could significantly affect our financial position and results of operations.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware will be the exclusive forum for substantially all disputes between us and our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, or employees.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware is the exclusive forum for:

·any derivative action or proceeding brought on our behalf;

·any action asserting a breach of fiduciary duty;

·any action asserting a claim against us arising under the DGCL, our amended and restated certificate of incorporation, or our amended and restated bylaws; and

·any action asserting a claim against us that is governed by the internal affairs doctrine.

This exclusive forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for corporate disputes with us or our directors, officers, or other employees, which may discourage lawsuits against us and our directors, officers, and other employees. If a court were to find this exclusive forum provision in our amended and restated certificate of incorporation to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving the dispute in other jurisdictions, which could seriously harm our business.

79

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

None.

Item 3. Defaults Upon Senior Securities

Not applicable.

Item 4. Mine Safety Disclosure

Not applicable.

Item 5. Other Information

None.

Item 6. Exhibits

Exhibit		Incorporated by Reference
Number	Exhibit Description	Form	Date	Number
4.1	Form of Pre-Funded Warrant	8-K	November 18, 2019	4.1
10.1#	Employment Agreement, dated November 27, 2019, by and between Replimune Inc. and Jean Franchi	8-K	December 9, 2019	10.1
10.2*#	Separation Agreement and Release, dated December 23, 2019, by and between Replimune Inc. and Howard Kaufman
31.1*	Certification of the Chief Executive Officer, as required by Section 302 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
31.2*	Certification of the Chief Financial Officer, as required by Section 302 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
32.1*	Certification of the Chief Executive Officer, as required by Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
32.2*	Certification of the Chief Financial Officer, as required by Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
101.INS*	XBRL Instance Document.
101.SCH*	XBRL Taxonomy Extension Schema Document.
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF*	XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB*	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document.

* Filed or furnished herewith. The certifications furnished in Exhibit 32.1 and Exhibit 32.2 hereto are deemed to accompany this Quarterly Report on Form 10-Q and will not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, except to the extent that the registrant specifically incorporates it by reference.

# Indicates management contract or compensatory plan.

80

SIGNATURES

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

	REPLIMUNE GROUP, INC.
Dated: February 13, 2020	By:	/s/ Philip Astley-Sparke
		Name:	Philip Astley-Sparke
		Title:	Chief Executive Officer and Director
		(Principal Executive Officer)
Dated: February 13, 2020	By:	/s/ Jean Franchi
		Name:	Jean Franchi
		Title:	Chief Financial Officer
		(Principal Financial Officer)

81

EX-10.2

Exhibit 10.2

18 Commerce Way

Woburn, MA 01801

PERSONAL & CONFIDENTIAL
BY HAND	December 20, 2019

Howard Kaufman

285 3rd St., #126

Cambridge, MA 02142

RE:         Separation Agreement and Release — EXECUTION COPY

Dear Howard:

This letter of agreement and general release (“Agreement”) confirms our mutual agreement regarding the terms and conditions of your separation from employment with Replimune, Inc. (the “Company”). You and the Company agree as follows:

1.Last Day of Employment.  Your last day of employment with the Company will be December 31, 2019 (“Last Day of Employment”). You will receive your salary and other amounts earned, accrued and owing but not yet paid through your Last Day of Employment, including  any benefits accrued and due under any applicable benefit plans and programs of the Company (“Accrued Obligations”), pursuant to your Employment Agreement with the Company dated June 22, 2018 (the “Employment Agreement”), regardless of whether you execute or revoke this Agreement. You will also receive payment for approved expenses provided you submit for such expenses by February 1st 2020. Your employment and your participation in and eligibility for the Company’s employee benefit plans and programs will terminate on your Last Day of Employment.

2.Consideration in Exchange for Release.  Upon execution of this Agreement (provided you do not revoke it), and provided that you (i) return all Company property upon request, however, you may keep your cellular telephone and your cellular telephone number (including porting to an alternative cellular phone provider if desired) subject to (a) your compliance with  Paragraph 5, (b) your assuming responsibility for any cellular telephone provider costs within two weeks of execution of this Agreement and that the Company after the nine month or shorter period in accordance with Paragraph 2(a) is able to confirm removal of all Company information and access to Company e-mail accounts, and (c) that you do not revoke and that you continue to comply with this Agreement (ii) provide all administrative information, including all login controls upon request, regarding all accounts you used or accessed related in any way to your work for the Company, and (iii) otherwise comply with your obligations under this Agreement and your continuing

1

obligations under Paragraphs 15-17 of your Employment Agreement, attached hereto as Exhibit A, the Company will:

a)Provide you with a payment in the amount of $315,000, subject to applicable taxes and withholdings, which constitutes .75 times your annual base salary (the “Severance”).  The Severance will be paid over the nine- month period following your Last Day of Employment in installments according to the Company’s normal payroll and payroll tax practices, with payments commencing within 60 days of your Last Day of Employment.  Commencing January 1, 2020, for a nine-month period, you agree to make yourself reasonably available to the Company to consult and advise on a question and answer basis via telephone or via e-mail and occasionally, upon reasonable notice, in-person meetings, which will be capped at a limit of five (5) meetings with respect to the transition of your responsibilities. You agree to make yourself available with reasonably acceptable turn around period (usually not greater than 48 hours other than during Holiday periods or on weekends) to provide advice on a question and answer basis via telephone or via e-mail and occasionally, upon reasonable notice, in-person meetings, which will be capped at a limit of five (5) meetings for medical monitoring, patient eligibility determination and e-mail confirmation of sign off, agreeing the Replimune study drug injection plan with study site clinical investigators, helping to address clinical trial site and regulatory authority (including Institutional Review Board) clinical trial protocol and related queries.  In order to enable you to perform these services you will retain your Company laptop computer, cellular telephone and e-mail account for the nine month period or otherwise shorter period if the Company determines the consultancy services to be provided no longer require access to these Company resources (excepting that you may then retain your cellular telephone in accordance with this Paragraph as described above). You agree that the compensation you will receive pursuant to this provision shall be all that you receive for providing these services and that you will not request or be owed any further compensation.

b)Provide you with a lump sum payment, subject to applicable taxes and withholdings, equal to the COBRA premiums that you would pay if you elected continued health coverage under the Company’s health plan for you and your dependents for the nine- month period following your Last Day of Employment, based on COBRA rates in effect on your Last Day of Employment.   This lump sum payment will be made within 60 days of your Last Day of Employment; and

c)Allow your options to acquire 321,635 shares of the Company’s common stock to continue to vest during the nine- month period following your Last Day of Employment and to extend the period during which you may exercise such vested options to December 31, 2020.

2

3.Release.

a)In consideration of the compensation benefits set forth in Paragraph 2 hereof, to the fullest extent permitted by law you waive, release and forever discharge the Company and each of its past and current parents, subsidiaries, affiliates, and each of its and their respective past and current directors, officers, members, trustees, employees, representatives, agents, attorneys, employee benefit plans and such plans’ administrators, fiduciaries, trustees, recordkeepers and service providers, and each of its and their respective successors and assigns, each and all of them in their personal and representative capacities (collectively the “Company Releasees”) from any and all claims legally capable of being waived, agreements, causes of action, attorneys’ fees, costs, damages, or any right to any monetary recovery or any other personal relief, whether known or unknown, in law or in equity, by contract, tort, law of trust or pursuant to federal, state or local statute, regulation, ordinance or common law, which you now have, ever have had, or may hereafter have, whether known or unknown to you, arising at any time up to the date of execution of this Agreement, arising out of or relating in any way to your employment with the Company or the termination thereof.

Without limiting the generality of the foregoing, this waiver, release, and discharge includes any claim or right, to the extent legally capable of being waived, based upon or arising under any federal, state or local fair employment practices or equal opportunity laws, including, but not limited to, the Age Discrimination in Employment Act (“ADEA”) (29 U.S.C. Section 621, et seq.), 42 U.S.C. Section 1981, Title VII of the Civil Rights Act of 1964, the Equal Pay Act, the Employee Retirement Income Security Act (“ERISA”) (including, but not limited to, claims for breach of fiduciary duty under ERISA), the Americans With Disabilities Act, the Family and Medical Leave Act of 1993, the Massachusetts Fair Employment Practices Act, the Massachusetts Civil Rights Act, the Massachusetts Equal Rights Act, the Massachusetts Parental Leave Act, the Massachusetts Labor and Industries Act, the Massachusetts right of privacy law, the Massachusetts Wage Act (as further explained below), the Massachusetts Earned Sick Time law, the Massachusetts Equal Pay Act, and the Massachusetts Minimum Fair Wage Law, as well as any claim or right under your Employment Agreement unless as provided herein.

This waiver, release, and discharge includes any claims arising under any employment agreement you have had with the Company and any amendments thereto.

Massachusetts Wage Act Waiver.  By signing this Agreement, you acknowledge that this waiver includes any claims against the Company Releasees under Mass. Gen. Laws ch. 149, § 148 et seq., — the Massachusetts Wage Act. These claims include, but are not limited to, claims for failure to pay earned wages, failure to pay overtime, failure to pay earned commissions, failure to timely pay wages, failure to

3

pay accrued vacation or holiday pay, failure to furnish appropriate pay stubs, improper wage deductions, and failure to provide proper check-cashing facilities.

b)Notwithstanding the generality of the foregoing, nothing herein constitutes a release or waiver by you of, or prevents you from making or asserting: (i) any claim or right you may have under COBRA; (ii) any claim or right you may have for unemployment insurance or workers’ compensation benefits (other than for retaliation under workers’ compensation laws); (iii) any claim to vested benefits under the written terms of a qualified employee pension benefit plan; (iv) any claim for indemnity pursuant to Paragraph 25 of your Employment Agreement, which is incorporated herein by reference; (v) any medical claim incurred during your employment that is payable under applicable medical plans or an employer-insured liability plan; (vi) any claim or right that may arise after the execution of this Agreement; (vii) any claim or right you may have under this Agreement; or (viii) any claim that is not otherwise able to be waived under applicable law.

c)In addition, nothing herein shall prevent you from filing a charge or complaint with the Equal Employment Opportunity Commission (“EEOC”) or similar federal or state fair employment practices agency or interfere with your ability to participate in any investigation or proceeding conducted by such agency; provided, however, that pursuant to Paragraph 3(a), you are waiving any right to recover monetary damages or any other form of personal relief from the Company Releasees to the extent any such charge, complaint, investigation or proceeding asserts a claim subject to the release in Paragraph 3(a) above. To the extent you receive any such personal or monetary relief in connection with any such charge, complaint, investigation or proceeding, the Company will be entitled to an offset for the payment made pursuant to Paragraph 2 of this Agreement.

4.No Additional Entitlements.  You agree and represent that other than as provided for in this Agreement, you have received all entitlements due from the Company relating to your employment with the Company or under your Employment Agreement, including but not limited to, all wages earned, including without limitation all commissions and bonuses, sick pay, vacation pay, overtime pay, and any paid and unpaid personal leave for which you were eligible and entitled, and that no other entitlements are due to you other than as set forth in this Agreement. Additionally, the Company agrees not to contest any claim for unemployment benefits you may file; provided, however, that the Company may respond to any inquiry from the unemployment compensation board to the extent you make any allegations of wrongdoing by the Company.  Except as expressly provided for herein, your Employment Agreement with the Company is hereby terminated.

5.Return of Property.  You agree to promptly return to the Company after the nine month period or sooner if requested by Company all of its property, including, but not limited to, computers, files, and documents, including any correspondence or other materials containing trade secrets of the Company, identification cards, credit cards, keys, equipment, software and data, however stored other an as required to perform the consultancy services, as agreed with the Company. To the extent you have any Company information or material

4

stored on any PDA, personal computer, personal email, hard drive, thumb drive, cloud or other electronic storage device, you agree to cooperate with the Company in permanently deleting such information from such devices, subject to any Company litigation preservation directive then in effect.

6.Protection of Confidential Information.  Except as expressly permitted in Paragraph 8 of this Agreement or if otherwise required by law, you agree that you will not at any time, directly or indirectly, use or disclose any trade secret, confidential or proprietary information you have learned by reason of your employment with the Company (the “Confidential Information”) and will continue to abide by your confidentiality obligations pursuant to Paragraph 15 of your Employment Agreement.

7.Non-Disparagement.  Except as expressly permitted in Paragraph 8 of this Agreement, you agree that you shall not at any time make any written or oral comments or statements of a defamatory or disparaging nature regarding the Company and/or the Company Releasees and you shall not take any action that would cause or contribute to their being held in disrepute. The Company agrees that it shall not at any time make any written or oral comments or statements of a defamatory or disparaging nature concerning you.  You and the Company agree to prepare a mutually acceptable communication to employees and third parties regarding your separation.

8.Reports to Government Entities.  Nothing in this Agreement restricts or prohibits you from initiating communications directly with, responding to any inquiries from, providing testimony before, providing confidential information to, reporting possible violations of law or regulation to, or from filing a claim or assisting with an investigation directly with a self-regulatory authority or a government agency (collectively, the “Regulators”), or from making other disclosures that are protected under the whistleblower provisions of federal, state, or local law or regulation. You do not need the prior authorization of the Company to engage in conduct protected by this Paragraph, and you do not need to notify the Company that you have engaged in such conduct. Please take notice that federal law provides criminal and civil immunity to federal and state claims for trade secret misappropriation to individuals who disclose a trade secret to their attorney, a court, or a government official in certain, confidential circumstances that are set forth at 18 U.S.C. §§ I833(b)(1) and I 833(b)(2), related to the reporting or investigation of a suspected violation of the law, or in connection with a lawsuit for retaliation for reporting a suspected violation of the law.

9.Non-Admission. It is understood and agreed that neither the execution of this Agreement nor the terms of this Agreement constitute an admission of liability to you by the Company or the Company Releasees, and such liability is expressly denied. It is further understood and agreed that no person shall use the Agreement, or the consideration paid pursuant thereto, as evidence of an admission of liability, inasmuch as such liability is expressly denied.

10.Cooperation. You agree that upon the Company’s reasonable notice to you, and a reasonable request, you shall cooperate with the Company and its counsel (including,

5

if necessary, preparation for and appearance at depositions, hearings, trials or other proceedings) with regard to matters that relate to or arise out of matters you have knowledge about or have been involved with during your employment with the Company. In the event that such cooperation is required, you will be reimbursed for any reasonable travel expenses incurred in connection therewith.

11.Confidentiality of the Agreement. Except as permitted in Paragraph 8 of this Agreement, as may be required pursuant to the Securities Exchange Act of 1934, as amended, and the rules and regulations thereof, or if otherwise required by law, the parties, including the Company, shall not disclose the terms of this Agreement, or the circumstances giving rise to this Agreement, to any person other than their respective attorneys, immediate family members, accountants, financial advisors or corporate employees who have a business need to know such terms in order to approve or implement such terms.

12.Continuing Obligations. Subject to Paragraph 8 of this Agreement, you reaffirm and agree that you remain bound by Paragraphs 15-17 of your Employment Agreement, attached hereto as Exhibit A, which remain binding and in full force and effect in accordance with its terms, and is incorporated herein by reference.

13.Acknowledgments.  You hereby acknowledge that:

a)The Company advises you to consult with an attorney before signing this Agreement;

b)You have obtained independent legal advice from an attorney of your own choice with respect to this Agreement, or you have knowingly and voluntarily chosen not to do so;

c)You freely, voluntarily and knowingly entered into this Agreement after due consideration;

d)You have had a minimum of twenty-one (21) days to review and consider this Agreement;

e)You and the Company agree that changes to the Company’s offer contained in this Agreement, whether material or immaterial, will not restart the twenty-one (21) day consideration period provided for in Paragraph 13(d) above;

f)You have a right to revoke this Agreement by notifying the undersigned representative in writing, via hand delivery, facsimile or electronic mail, within seven (7) business days of your execution of this Agreement;

g)In exchange for your waivers, releases and commitments set forth herein, including your waiver and release of all claims arising under the ADEA, the payments, benefits and other considerations that you are receiving pursuant to this Agreement exceed any payment, benefit or other thing of value to which you would otherwise

6

be entitled, and are just and sufficient consideration for the waivers, releases and commitments set forth herein; and

h)No promise or inducement has been offered to you, except as expressly set forth herein, and you are not relying upon any such promise or inducement in entering into this Agreement.

14.Medicare Disclaimer. You acknowledge that you are not a Medicare Beneficiary as of the time you enter into this Agreement. To the extent that you are a Medicare Beneficiary, you agree to contact a Company Human Resources Representative for further instruction.

15.Miscellaneous.

a)Entire Agreement. This Agreement, together with the expressly  incorporated provisions of your Employment Agreement, sets forth the entire agreement between you and the Company and replaces any other oral or written agreement between you and the Company relating to the subject matter of this Agreement, including, without limitation, any prior offer letters and/or employment agreements.

b)Governing Law. This Agreement shall be construed, performed, enforced and in all respects governed in accordance with the laws of the Commonwealth of Massachusetts, without giving effect to the principles of conflicts of law thereof. Additionally, all disputes arising from or related to this Agreement shall be brought in a state or federal court situated in the Commonwealth of Massachusetts, Suffolk County, and the parties hereby expressly consent to the jurisdiction of such courts for all purposes related to resolving such disputes.

c)Severability. Should any provision of this Agreement be held to be void or unenforceable, the remaining provisions shall remain in full force and effect, to be read and construed as if the void or unenforceable provisions were originally deleted.

d)Amendments. This Agreement may not be modified or amended, except upon the express written consent of both you and the Company.

e)Breach. You acknowledge that if you breach your commitments to the Company agreed upon in Paragraphs 5, 6, 7, 9, 10, 11 and 12 you will forfeit the severance benefits set forth in Paragraph 2 and be subject to suit by the Company for damages and equitable relief relating to such breach. You further acknowledge that any breach by you of Paragraphs 5, 6, 7, 9, 10, 11 and 12 will cause irreparable damage to the Company and that in the event of such breach the Company shall have, in addition to any and all remedies at law, the right to an injunction, specific performance or other equitable relief to prevent the violation of your obligations hereunder.

7

f)Waiver. A waiver by either party hereto of a breach of any term or provision of the Agreement shall not be construed as a waiver of any subsequent breach.

g)Counterparts. This Agreement may be executed in one or more counterparts, and be transmitted by facsimile or pdf, each of which shall be deemed an original, but all of which together shall constitute one and the same agreement.

h)Effective Date. This Agreement will become effective and enforceable upon the expiration of the seven (7) business day revocation period provided for in Paragraph 13(f) above (the “Effective Date”). If you fail to return an executed original by January 8, 2020 (or otherwise revoke this Agreement pursuant to Paragraph 13(f) above), this Agreement, including but not limited to the obligation of the Company to provide the severance benefit provided in Paragraph 2 above, shall be deemed automatically null and void.

8

If the above accurately states our agreement, including the separation, waiver and release, kindly sign below and return the original Agreement to me by no later than January 8, 2020.

Sincerely,
Replimune Inc.
By:	/s/ Philip Astley-Sparke
Date:	12/23/2019
UNDERSTOOD, AGREED TO AND ACCEPTED WITH THE INTENTION TO BE LEGALLY BOUND:
/s/ Howard Kaufman
Howard Kaufman
Date:	12/23/2019

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Philip Astley-Sparke, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Replimune Group, 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)) for the registrant and 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) 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 evaluation; and

c) 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 the 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: February 13, 2020	By:	/s/ Philip Astley-Sparke
		Philip Astley-Sparke
		Chief Executive Officer
		(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Jean Franchi, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Replimune Group, 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)) for the registrant and 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) 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 evaluation; and

c) 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 the 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: February 13, 2020	By:	/s/ Jean Franchi
		Jean Franchi
		Chief Financial Officer
		(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Replimune Group, Inc. (the “Company”) for the period ended December 31, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Philip Astley-Sparke, Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of his knowledge:

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

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: February 13, 2020	By:	/s/ Philip Astley-Sparke
		Philip Astley-Sparke
		Chief Executive Officer
		(Principal Executive Officer)

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Replimune Group, Inc. (the “Company”) for the period ended December 31, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Jean Franchi, Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of his knowledge:

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

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: February 13, 2020	By:	/s/ Jean Franchi
		Jean Franchi
		Chief Financial Officer
		(Principal Financial Officer)

XML

Commitments and contingencies - Additional information related to leases (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Oct. 22, 2019	Aug. 01, 2019
Leases
Right-to-use operating lease asset	$ 4,731	$ 4,731	$ 18,425	$ 2,368
Right-to-use financing lease asset	47,528	47,528
Total lease assets	52,259	52,259
Operating lease liabilities, current	1,011	1,011
Finance lease liabilities, current	2,393	2,393
Operating lease liabilities, non-current	3,886	3,886
Finance lease liabilities, non-current	25,016	25,016
Total lease liabilities	32,306	32,306
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	516
Operating cash flows from finance leases	623
Financing cash flows from finance leases	22	22
Right-to-use asset obtained in exchange for new operating lease liabilities	5,152	5,152
Right-to-use asset obtained in exchange for new financing lease liabilities	$ 48,224	$ 48,224
Weighted-average remaining lease term - operating leases	8 years 7 months 6 days	8 years 7 months 6 days
Weighted-average remaining lease term - financing leases	19 years 7 months 6 days	19 years 7 months 6 days
Weighted-average discount rate - operating leases	7.00%	7.00%
Weighted-average discount rate - financing leases	8.00%	8.00%

XML

Long-Term Debt (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Long-Term Debt
Principal amount of long-term debt	$ 10,000
Unamortized debt discount	(261)
Long-term debt, net of discount	$ 9,739

XML

Stockholders' Equity - Convertible preferred stock (Details) $ in Thousands	Jul. 25, 2018 shares	Jul. 09, 2018	Dec. 31, 2019 USD ($)
Convertible preferred stock
Forward stock split ratio for each common stock		0.100534
Preferred stock outstanding | $			$ 0
Common stock
Convertible preferred stock
Conversion of shares (in shares) | shares	19,157,360

XML

Property, plant and equipment, net (Tables)

9 Months Ended

Dec. 31, 2019

Property, plant and equipment, net

Schedule of property, plant and equipment, net

	December 31,		March 31,
	2019		2019
Construction in progress	$	726	$	124
Plant and laboratory equipment		3,453		584
Leasehold improvements		368		154
Computer equipment		981		138
Office equipment		721		49
Build-to-suit lease asset		—		11,514
		6,249		12,563
Less: Accumulated depreciation and amortization		(595)		(404)
	$	5,654	$	12,159

XML

Summary of significant accounting policies (Policies)

9 Months Ended

Dec. 31, 2019

Summary of significant accounting policies

Principles of consolidation

Principles of consolidation

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, and include the accounts of the Company and its wholly owned subsidiaries, Replimune UK, Replimune US and Replimune Securities Corporation, after elimination of all intercompany accounts and transactions. The consolidated financial statements reflect the capital as if Replimune Group, Inc. had been in existence for all periods presented.

Use of estimates

Use of estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting periods. Significant estimates and assumptions reflected in these consolidated financial statements include, but are not limited to, the accrual for research and development expenses and the valuation of common stock and stock‑based awards. The Company bases its estimates on historical experience, known trends and other market‑specific or other relevant factors that it believes to be reasonable under the circumstances. Estimates are periodically reviewed in light of reasonable changes in circumstances, facts and experience. Changes in estimates are recorded in the period in which they become known. Actual results could differ from those estimates or assumptions.

Unaudited interim financial information

Unaudited interim financial information

The accompanying consolidated balance sheet as of December 31, 2019, the consolidated statements of operations, of comprehensive loss and of convertible preferred stock and stockholders’ equity for the three and nine months ended December 31, 2019 and 2018 and the consolidated statements of cash flows for the nine months ended December 31, 2019 and 2018 are unaudited. The unaudited interim consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of the Company’s financial position as of December 31, 2019 and the results of its operations for the three and nine months ended December 31, 2019 and 2018. The financial data and other information disclosed in these consolidated notes related to the three and nine months ended December 31, 2019 and 2018 are unaudited. The results for the three and nine months ended December 31, 2019 are not necessarily indicative of results to be expected for the year ending March 31, 2020, any other interim periods or any future year or period. The financial information included herein should be read in conjunction with the financial statements and notes in the Company's Annual Report on Form 10-K for the year ended March 31, 2019.

During the three and nine months ended December 31, 2019, there have been no changes to the Company’s significant accounting policies as described in the Company's Annual Report on Form 10-K for the year ended March 31, 2019, except as described below.

Debt Issuance Costs

Debt Issuance Costs

Debt issuance costs consist of payments made to secure commitments under certain debt financing arrangements. These amounts are recognized as interest expense over the period of the financing arrangement using the effective interest method. If the financing arrangement is canceled or forfeited, or if the utility of the arrangement to the Company is otherwise compromised, these costs are recognized as interest expense immediately. The Company's condensed consolidated financial statements present debt issuance costs related to a recognized debt liability as a direct reduction from the carrying amount of that debt liability.

Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In June 2018, the FASB issued Accounting Standards Updates (“ASU” ) No. 2018-07, Compensation - Stock Compensation (Topic 718):Improvements to Nonemployee Share-Based Payment Accounting (“ASU 2018-07”). ASU 2018-17 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. ASU 2018-17 also clarifies that Topic 718 does not apply to share-based payments used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Revenue from Contracts with Customers (Topic 606).  The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is permitted. The Company adopted ASU 2018-17 on April 1, 2019.  The adoption of ASU 2018-17 did not have a material impact on the Company’s consolidated financial statements.

In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815) I. Accounting for Certain Financial Instruments with Down Round Features II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception (“ASU 2017-11”). Part I applies to entities that issue financial instruments such as warrants, convertible debt or convertible preferred stock that contain down-round features. Part II replaces the indefinite deferral for certain mandatorily redeemable noncontrolling interests and mandatorily redeemable financial instruments of nonpublic entities contained within Accounting Standards Codification (“ASC”) Topic 480 with a scope exception and does not impact the accounting for these mandatorily redeemable instruments. ASU 2017-11 is required to be adopted for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted ASU 2017-11 on April 1, 2019. The adoption of ASU 2017-11 did not have a material impact on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02 ("ASU 2016-02"), Leases (Topic 842), which supersedes FASB Topic 840, Leases (Topic 840) and provides principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases. In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842) Land Easement Practical Expedient for Transition to Topic 842, which amends ASU 2016-02 to provide entities an optional transition practical expedient to not evaluate under Topic 842 existing or expired land easements that were not previously accounted for as leases under the current leases guidance in Topic 842. An entity that elects this practical expedient should evaluate new or modified land easements under Topic 842 beginning at the date that the entity adopts Topic 842. In July 2018, the FASB also issued ASU 2018-11, Leases (Topic 842): Targeted Improvements, which provides an optional transition method that allows entities to elect to apply the standard prospectively at its effective date, versus recasting the prior periods presented.

The Company adopted ASU 2016-02, as amended, on April 1, 2019, which supersedes the current leasing guidance and upon adoption, requires lessees to recognize right-of-use assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. Upon the adoption of the guidance, operating leases are capitalized on the balance sheet at the present value of lease payments. The balance sheet amount recorded for existing leases at the date of adoption of ASU 2016-02 was calculated using the applicable incremental borrowing rate at the date of adoption.

The Company adopted ASU 2016-02, including several practical expedients on April 1, 2019. The Company elected the available package of practical expedients, which allows the Company to not reassess previous accounting conclusions around whether arrangements are or contain leases, the classification of leases, and the treatment of initial direct costs. The Company also made an accounting policy election to utilize the short-term lease exemption, whereby leases with a term of 12 months or less will not follow the recognition and measurement requirements of the new standard. Upon adoption, the Company recognized total right-of-use assets of $789, with corresponding liabilities of $837 on the consolidated balance sheets. Additionally,  the Company derecognized $11,514 of construction in progress assets and $6,561 of financing obligations and recorded long term prepaid rent of $5,006 on the consolidated balance sheet (see Note 12).

The following table summarizes the financial impact on the Company’s condensed consolidated balance sheet upon the adoption of ASU 2016-02 and the cumulative effect adjustment on April 1, 2019:

	March31,2019		Adjustments		April1,2019
Property, plant, and equipment, net	$	12,159	$	(11,514)	$	645
Right-to-use asset	$	—	$	789	$	789
Long term prepaid rent	$	—	$	5,006	$	5,006
Lease liabilities, current	$	—	$	388	$	388
Lease liabilities, non-current	$	—	$	449	$	449
Accrued expenses	$	2,801	$	(24)	$	2,777
Deferred rent, net of current portion	$	24	$	(24)	$	—
Financing obligation	$	6,561	$	(6,561)	$	—
Accumulated deficit	$	(59,766)	$	93	$	(59,673)

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). The amendments in this ASU require certain existing disclosure requirements in Topic 820 to be modified or removed, and certain new disclosure requirements to be added to the Topic. In addition, this ASU allows entities to exercise more discretion when considering fair value measurement disclosures. ASU 2018-13 will be effective for the Company beginning April 1, 2020 with early adoption permitted. The Company is in the process of evaluating the impact of ASU 2018-13 on its consolidated financial statements and disclosures.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments- Credit Losses (Topic 326). The standard changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. Financial assets measured at amortized cost will be presented at the net amount expected to be collected by using an allowance for credit losses. In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments, which clarifies and corrects certain unintended applications of the guidance contained in each of the amended Topics. Additionally, in May 2019, the FASB issued ASU No. 2019-05, Financial Instruments – Credit Losses (Topic 326), which provides an option to irrevocably elect to measure certain individual financial assets at fair value instead of amortized cost. The standard is effective for fiscal years and interim periods beginning after December 15, 2019. Early adoption is permitted for all periods beginning after December 15, 2018. The Company is currently in the process of evaluating the impact the standard will have on its consolidated financial statements

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Commitments and contingencies (Tables)

9 Months Ended

Dec. 31, 2019

Commitments and contingencies

Schedule of variable lease components

	Three Months Ended		Nine Months Ended
	December 31,		December 31,
	2019		2019
Lease cost
Finance lease costs:
Amortization of right-of-use asset	$	607	$	666
Interest on lease liabilities		591		652
Operating lease costs		262		633
Total lease cost	$	1,460	$	1,951

Summary of the maturity of company's lease liabilities

	December 31, 2019
	Operating lease		Financing lease		Total
2020 (remaining three months)	$	243	$	593	$	836
2021		1,034		2,411		3,445
2022		586		2,483		3,069
2023		596		2,558		3,154
2024		605		2,634		3,239
Thereafter		3,384		46,398		49,782
Total lease payments		6,448		57,077		63,525
Less: interest		1,551		29,668		31,219
Total lease liabilities	$	4,897	$	27,409	$	32,306

Schedule of future annual minimum lease payment commitments

2020	$	2,062
2021		2,901
2022		2,493
2023		2,568
2024		2,645
2025		2,725
Thereafter		12,770
	$	28,164

Schedule of additional information related to leases

	December 31, 2019
Leases
Right-to-use operating lease asset	$	4,731
Right-to-use finance lease asset		47,528
Total lease assets	$	52,259
Operating lease liabilities, current	$	1,011
Finance lease liabilities, current		2,393
Operating lease liabilities, non-current		3,886
Finance lease liabilities, non-current		25,016
Total lease liabilities	$	32,306
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	516
Operating cash flows from finance leases	$	623
Financing cash flows from finance leases	$	22
Right-to-use asset obtained in exchange for new operating lease liabilities	$	5,152
Right-to-use asset obtained in exchange for new financing lease liabilities	$	48,224
Variable lease costs	$	—
Short term lease costs	$	—
Weighted-average remaining lease term - operating leases		8.6	years
Weighted-average remaining lease term - financing leases		19.6	years
Weighted-average discount rate - operating leases		7	%
Weighted-average discount rate - financing leases		8	%

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Fair value of financial assets and liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Fair value of financial assets and liabilities
Transfer from Leve 1 to Level 2, assets	$ 0	$ 0	$ 0	$ 0
Transfer from Leve 2 to Level 1, assets	0	0	0	0
Transfers into Level 3, assets	0	0	0	0
Transfer out of Level 3, assets	0	0	0	0
Transfer from Leve 1 to Level 2, liabilities	0	0	0	0
Transfer from Leve 2 to Level 1, liabilities	0	0	0	0
Transfers into Level 3, liabilities	0	0	0	0
Transfer out of Level 3, liabilities	0	$ 0	0	$ 0
Recurring
Fair value of financial assets and liabilities
Assets fair value	163,852		163,852		$ 119,771
Level 2 | Recurring
Fair value of financial assets and liabilities
Assets fair value	163,852		163,852		119,771
Money market funds | Recurring
Fair value of financial assets and liabilities
Assets fair value	35,853		35,853		2,676
Money market funds | Level 2 | Recurring
Fair value of financial assets and liabilities
Assets fair value	35,853		35,853		2,676
Commercial paper | Recurring
Fair value of financial assets and liabilities
Assets fair value	42,172		42,172		46,687
Commercial paper | Level 2 | Recurring
Fair value of financial assets and liabilities
Assets fair value	42,172		42,172		46,687
US Government Agency bonds | Recurring
Fair value of financial assets and liabilities
Assets fair value	23,158		23,158		20,884
US Government Agency bonds | Level 2 | Recurring
Fair value of financial assets and liabilities
Assets fair value	23,158		23,158		20,884
US Treasury bonds | Recurring
Fair value of financial assets and liabilities
Assets fair value	28,105		28,105		41,057
US Treasury bonds | Level 2 | Recurring
Fair value of financial assets and liabilities
Assets fair value	28,105		28,105		41,057
Corporate debt securities | Recurring
Fair value of financial assets and liabilities
Assets fair value	34,564		34,564		8,467
Corporate debt securities | Level 2 | Recurring
Fair value of financial assets and liabilities
Assets fair value	$ 34,564		$ 34,564		$ 8,467

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Significant agreements

9 Months Ended

Dec. 31, 2019

Significant agreements

Significant agreements

11.         Significant agreements

Agreement with Bristol-Myers Squibb Company

In February 2018, the Company entered into an agreement with Bristol-Myers Squibb Company (“BMS”). Pursuant to the agreement, BMS will provide to the Company, at no cost, nivolumab for use in the Company’s ongoing clinical trial  of RP1 in combination with nivolumab. Under the agreement, the Company will sponsor, fund and conduct the clinical trial in accordance with an agreed-upon protocol. BMS granted the Company a non-exclusive, non-transferrable, royalty-free license (with a right to sublicense) under its intellectual property to its compound in the clinical trial and agreed to manufacture and supply its compound, at its cost and for no charge to the Company, for use in the clinical trial. In January 2020, this agreement was expanded to cover an additional cohort of 125 patients with anti-PD1 refractory melanoma.

Unless earlier terminated, the agreement will remain in effect until  the latter of (i) the completion of the clinical trial, (ii) all related clinical trial data have been delivered to both parties and (iii) the completion of any statistical analyses and bioanalyses contemplated by the clinical trial protocol or any analysis otherwise agreed upon by the parties. The agreement may be terminated by either party (x) in the event of an uncured material breach by the other party, (y) in the event the other party is insolvent or in bankruptcy proceedings or (z) for safety reasons. Upon termination, the licenses granted to the Company to use BMS’s compound in the clinical trial will terminate. 

As of December 31, 2019, the Company had not incurred any costs and does not expect to incur future costs in connection with this agreement.

In April 2019, the Company entered into a separate agreement with BMS on terms similar to the terms set forth in the agreement described above, pursuant to which BMS will provide to the Company, at no cost, nivolumab for use in the Company's Phase 1 clinical trial of RP2 in combination with nivolumab.

Agreement with Regeneron Pharmaceuticals, Inc.

In May 2018, the Company entered into an agreement with Regeneron Pharmaceuticals, Inc. (“Regeneron”). The Company and Regeneron are each independently developing compounds for the treatment of certain tumor types. Pursuant to the agreement, the Company and Regeneron will undertake one or more clinical trials using a combination of the compounds being developed by each entity. Under the agreement, each study will be conducted under terms set out in a separately agreed upon study plan that will identify the name of the sponsor and which party will manage the particular clinical trial, and include the protocol, the budget and a schedule of clinical obligations.  In June 2018, under the terms of the agreement between the Company and Regeneron, the parties agreed to the first study plan. The Company and Regeneron have agreed to the protocol, budget, sample testing and clinical obligations schedule under the study plan. Development and supply costs associated with the study plan will be split equally between the Company and Regeneron.

Pursuant to the terms of the agreement, each party granted the other party a non-exclusive license under its respective intellectual property and agreed to contribute the necessary resources needed to fulfill its respective obligations, in each case, under the terms of the agreed-upon or to-be agreed upon study plans. Development costs of a particular clinical trial will be split equally between the Company and Regeneron.

The agreement may be terminated by either party if (i) there is no active study plan for which a final study report has not been completed, (ii) the parties have not entered into a study plan for an additional clinical trial within a period of time after the delivery of the most recent final study report or (iii) in the event of a material breach.

The Company will account for costs incurred as part of the study, including costs to supply compounds for use in the study, as research and development expenses within the consolidated statement of operations.  The Company will recognize any amounts received from Regeneron in connection with this agreement as an offset to research and development expense within the consolidated statement of operations.

Under the terms of the agreement, on a quarterly basis the Company and Regeneron true-up costs of the study and make corresponding payments to the party that incurred the majority of the costs. During the three and nine months ended December 31, 2019 and 2018, the Company did not make any payments under the terms of the agreement to Regeneron. During the three and nine months ended December 31, 2019, the Company received payments under the terms of the agreement to Regeneron of $760 and $2,008, respectively, which were recorded as an offset to research and development expenses on the consolidated statement of operations. The Company did not receive any payments under the terms of the agreement to Regeneron during the three and nine months ended December 31, 2018. As of December 31, 2019 and March 31, 2019, the Company recorded $1,017 and $337 of receivables from Regeneron in connection with this agreement in prepaid expenses and other current assets in the consolidated balance sheet, respectively.

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Long-Term Debt

9 Months Ended

Dec. 31, 2019

Long-Term Debt

Long-Term Debt

7.           Long-Term Debt

Long-term debt consisted of the following:

	December 31,
	2019
Principal amount of long-term debt	$	10,000
Unamortized debt discount		(261)
Long-term debt, net of discount	$	9,739

Hercules Loan Agreement

On August 8, 2019, (the “Closing Date”) the Company and certain of its affiliates entered into a Loan and Security Agreement (the “Loan Agreement”) with Hercules Capital, Inc. (“Hercules”) pursuant to which Hercules agreed to make available to the Company a secured term loan facility in the amount of $30,000 (the “Term Loan Facility”), subject to certain terms and conditions. The Company borrowed $10,000 under the Loan Agreement in one advance as a single tranche Term Loan on the Closing Date upon which the Company paid a $225 facility charge and incurred $130 in additional closing and legal fees. The Company may borrow the unused $20,000 available under the Term Loan Facility in two separate advances.  The second advance of up to $10,000 may be borrowed between January 1, 2020 and December 15, 2020 and the third advance of up to $10,000 may be borrowed between July 1, 2020 and June 30, 2021.

Advances under the Term Loan Facility bear interest at a rate per annum equal to the greater of either (i) the prime rate as reported in The Wall Street Journal plus 2.75%,  or (ii) 8.75%. The Loan Agreement includes covenants, limitations, and events of default customary for similar facilities. The term of the Loan Agreement is four years, ending August 1, 2023.

Interest is payable on a monthly basis until March 1, 2022 (the “Amortization Date”). After the Amortization Date, payments shall consist of equal monthly installments of principal and interest payable until the secured obligations are repaid in full.

At any time the Company may prepay the principal of any advance pursuant to the terms of the Term Loan Facility subject to a prepayment charge equal to: 3.0%, if such advance is prepaid within the first twelve months following the Closing Date, 2.0%, if such advance is prepaid after twelve months but prior to twenty four months following the Closing Date, and 1.0%, if such advance is prepaid anytime thereafter. The Company will also pay a charge  equal to the product of 4.95% and the aggregate amount of any advance made pursuant to the terms of the Term Loan Facility.

The Term Loan Facility is secured by substantially all of the Company’s assets, but excluding its intellectual property, and subject to certain exceptions and exclusions.

The Loan Agreement contains customary covenants for transactions of this type and other covenants agreed to by the parties, including, among others, (i) the provision of delivery of annual and quarterly financial statements and insurance policies and restrictions on incurring debt, granting liens, making acquisitions, making loans, paying dividends, dissolving, and entering into leases and asset sales. The Loan Agreement also provides for customary events of default, including, among others, events of default relating to failure to make payment, bankruptcy, breach of covenants, breaches of representations and warranties, change of control, judgment and material adverse effects.

In connection with entering into the Hercules Loan Agreement the Company also paid Hercules $355 of upfront fees, including closing costs and legal fees associated with entering into the agreement, which were recorded as a debt discount. The debt discount is reflected as a reduction of the carrying value of long-term debt on the Company’s condensed consolidated balance sheet and is being amortized to interest expense over the term of the loan using the effective interest method.

The Company recognized aggregate interest expense under the Hercules Loan Agreement of $302 and $376 during the three and nine months ended December 31, 2019, which included non-cash interest expense of $81 and $94 related to the accretion of the debt discount and the final payment. As of December 31, 2019, the unamortized debt discount was $261. The Company’s annual effective interest rate of the Hercules Loan Agreement was approximately 10.1% for the period from August 8, 2019 to December 31, 2019.

There were no principal payments due or paid under the Hercules Loan Agreement during the three and nine months ended December 31, 2019.

Future payments of long-term debt, as of December 31, 2019 are as follows (fiscal years):

2021	$	—
2022		527
2023		6,558
2024		2,915
Total debt payments	$	10,000

The table of future payments of long-term debt excludes the end of term charge of $495 which is due upon the maturity of the loan.

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CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEICIT) - USD ($) $ in Thousands	Convertible preferred stock	Common stock ATM sales	Common stock Follow-on public offering	Common stock Initial public offering	Common stock	Additional paid-in capital ATM sales	Additional paid-in capital Follow-on public offering	Additional paid-in capital Initial public offering	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive loss	ATM sales	Follow-on public offering	Initial public offering	Total
Balance at Mar. 31, 2018	$ 86,361				$ 5				$ 1,097	$ (28,932)	$ (238)				$ (28,068)
Balance (in shares) at Mar. 31, 2018	1,925,968				5,007,485
Increase (decrease) in Stockholders' Equity
Foreign currency translation adjustment											(847)				(847)
Unrealized gain (loss) on short-term investments											35				35
Stock-based compensation expense									225						225
Net loss										(10,044)					(10,044)
Balance at Jun. 30, 2018	$ 86,361				$ 5				1,322	(38,976)	(1,050)				(38,699)
Balance (in shares) at Jun. 30, 2018	1,925,968				5,007,485
Balance at Mar. 31, 2018	$ 86,361				$ 5				1,097	(28,932)	(238)				(28,068)
Balance (in shares) at Mar. 31, 2018	1,925,968				5,007,485
Increase (decrease) in Stockholders' Equity
Foreign currency translation adjustment															(1,088)
Unrealized gain (loss) on short-term investments															(54)
Conversion of convertible preferred stock into common stock upon closing of initial public offering															7,094
Conversion of convertible preferred stock warrants into common stock warrants															86,361
Net loss															(24,178)
Balance at Dec. 31, 2018					$ 32				197,697	(53,110)	(1,380)				143,239
Balance (in shares) at Dec. 31, 2018					31,640,672
Balance at Jun. 30, 2018	$ 86,361				$ 5				1,322	(38,976)	(1,050)				(38,699)
Balance (in shares) at Jun. 30, 2018	1,925,968				5,007,485
Increase (decrease) in Stockholders' Equity
Foreign currency translation adjustment											(139)				(139)
Unrealized gain (loss) on short-term investments											(34)				(34)
Exercise of stock options					$ 1				11						12
Exercise of stock options (in shares)					7,149
Conversion of convertible preferred stock into common stock upon closing of initial public offering	$ (86,361)				$ 19				86,342						86,361
Conversion of convertible preferred stock into common stock upon closing of initial public offering (in shares)	(1,925,968)				19,157,360
Conversion of convertible preferred stock warrants into common stock warrants									7,094						7,094
Repurchase of class A common stock upon closing of initial public offering (in shares)					(26,258)
Issuance of common shares upon closing of follow-on public offering, net of issuance costs and underwriter fees				$ 7				$ 101,177						$ 101,184
Issuance of common shares upon closing of follow-on public offering, net of issuance costs and underwriter fees (in shares)				7,407,936
Stock-based compensation expense									718						718
Net loss										(6,461)					(6,461)
Balance at Sep. 30, 2018					$ 32				196,664	(45,437)	(1,223)				150,036
Balance (in shares) at Sep. 30, 2018					31,553,672
Increase (decrease) in Stockholders' Equity
Foreign currency translation adjustment											(102)				(102)
Unrealized gain (loss) on short-term investments											(55)				(55)
Exercise of stock options									153						153
Exercise of stock options (in shares)					87,000
Stock-based compensation expense									880						880
Net loss										(7,673)					(7,673)
Balance at Dec. 31, 2018					$ 32				197,697	(53,110)	(1,380)				143,239
Balance (in shares) at Dec. 31, 2018					31,640,672
Balance at Mar. 31, 2019					$ 32				198,645	(59,766)	(1,055)				137,856
Balance (in shares) at Mar. 31, 2019					31,656,950
Increase (decrease) in Stockholders' Equity
Foreign currency translation adjustment											(182)				(182)
Unrealized gain (loss) on short-term investments											65				65
Exercise of stock options									18						18
Exercise of stock options (in shares)					6,751
Impact of adoption of ASC 842										93					93
Stock-based compensation expense									1,810						1,810
Net loss										(9,508)					(9,508)
Balance at Jun. 30, 2019					$ 32				200,473	(69,181)	(1,172)				130,152
Balance (in shares) at Jun. 30, 2019					31,663,701
Balance at Mar. 31, 2019					$ 32				198,645	(59,766)	(1,055)				137,856
Balance (in shares) at Mar. 31, 2019					31,656,950
Increase (decrease) in Stockholders' Equity
Foreign currency translation adjustment															$ 8
Exercise of stock options (in shares)															184,580
Issuance of common shares upon closing of follow-on public offering, net of issuance costs and underwriter fees (in shares)												287,559
Net loss															$ (36,836)
Balance at Dec. 31, 2019					$ 37				295,084	(96,509)	(1,047)				197,565
Balance (in shares) at Dec. 31, 2019					36,645,650
Balance at Jun. 30, 2019					$ 32				200,473	(69,181)	(1,172)				130,152
Balance (in shares) at Jun. 30, 2019					31,663,701
Increase (decrease) in Stockholders' Equity
Foreign currency translation adjustment											(218)				(218)
Unrealized gain (loss) on short-term investments											(40)				(40)
Exercise of stock options									105						105
Exercise of stock options (in shares)					55,645
Stock-based compensation expense									1,781						1,781
Net loss										(11,139)					(11,139)
Balance at Sep. 30, 2019					$ 32				202,359	(80,320)	(1,430)				120,641
Balance (in shares) at Sep. 30, 2019					31,719,346
Increase (decrease) in Stockholders' Equity
Foreign currency translation adjustment											408				408
Unrealized gain (loss) on short-term investments											(25)				(25)
Exercise of stock options									357						357
Exercise of stock options (in shares)					122,184
Conversion of convertible preferred stock warrants into common stock warrants									28,145						28,145
Issuance of common shares upon closing of follow-on public offering, net of issuance costs and underwriter fees			$ 5			$ 4,431	$ 57,448					$ 4,431	$ 57,453
Issuance of common shares upon closing of follow-on public offering, net of issuance costs and underwriter fees (in shares)		287,559	4,516,561
Stock-based compensation expense									2,344						2,344
Net loss										(16,189)					(16,189)
Balance at Dec. 31, 2019					$ 37				$ 295,084	$ (96,509)	$ (1,047)				$ 197,565
Balance (in shares) at Dec. 31, 2019					36,645,650

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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Current assets:
Cash and cash equivalents	$ 63,002	$ 25,704
Short-term investments	117,877	109,107
Research and development incentives receivable	4,775	2,474
Prepaid expenses and other current assets	5,220	3,696
Total current assets	190,874	140,981
Property, plant and equipment, net	5,654	12,159
Restricted cash	1,636	1,186
Right-to-use asset - operating leases	4,731
Right-to-use asset - financing leases	47,528
Total assets	250,423	154,326
Current liabilities:
Accounts payable	6,256	7,084
Accrued expenses and other current liabilities	4,557	2,801
Operating lease liabilities, current	1,011
Financing lease liabilities, current	2,393
Total current liabilities	14,217	9,885
Deferred rent, net of current portion		24
Financing obligation		6,561
Long term debt, net of debt discount	9,739
Operating lease liabilities, non-current	3,886
Finance lease liabilities, non-current	25,016
Total liabilities	52,858	16,470
Commitments and contingencies (Note 12)
Stockholders' Equity:
Common stock, $0.001 par value; 150,000,000 shares authorized as of December 31, 2019 and March 31, 2019; 36,645,650 and 31,656,950 shares issued and outstanding as of December 31, 2019 and March 31, 2019	37	32
Additional paid-in capital	295,084	198,645
Accumulated deficit	(96,509)	(59,766)
Accumulated other comprehensive loss	(1,047)	(1,055)
Total stockholders' equity	197,565	137,856
Total liabilities and stockholders' equity	$ 250,423	$ 154,326

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Fair value of financial assets and liabilities

9 Months Ended

Dec. 31, 2019

Fair value of financial assets and liabilities

Fair value of financial assets and liabilities

3.           Fair value of financial assets and liabilities

The following tables present information about the Company’s financial assets and liabilities measured at fair value on a recurring basis:

	Fair Value Measurements as of
	December 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	—	$	35,853	$	—	$	35,853
Commercial paper		—		42,172		—		42,172
US Government Agency bonds		—		23,158		—		23,158
US Treasury bonds		—		28,105		—		28,105
Corporate debt securities		—		34,564		—		34,564
	$	—	$	163,852	$	—	$	163,852

	Fair Value Measurements as of
	March 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	—	$	2,676	$	—	$	2,676
Commercial paper		—		46,687		—		46,687
US Government Agency bonds		—		20,884		—		20,884
US Treasury bonds		—		41,057		—		41,057
Corporate debt securities		—		8,467		—		8,467
	$	—	$	119,771	$	—	$	119,771

During the three and nine months ended December 31, 2019 and 2018,  there were no transfers between levels.

Valuation of cash equivalents and short‑term investments

Money market funds, commercial paper, US Government Agency bonds, US Treasury bonds and corporate debt securities were valued by the Company using quoted prices in active markets for similar securities, which represent a Level 2 measurement within the fair value hierarchy.

Valuation of Warrant Liability

The warrant liability is related to the warrants to purchase shares of series seed convertible preferred stock (see Note 8). The fair value of the warrant liability was determined based on significant inputs not observable in the market , which represents a Level 3 measurement within the fair value hierarchy. Upon the closing of the IPO in July 2018, the warrant to purchase shares of the Company’s series seed convertible preferred stock was converted into a warrant to purchase shares of the Company’s common stock.  As a result, the warrant liability was remeasured a final time on the closing date of the IPO and reclassified to stockholders’ equity.

The Company used the Black-Scholes option-pricing model, which incorporated assumptions and estimates, to value the warrant liability. Key estimates and assumptions impacting the fair value measurement include: (i) the expected term of the warrants, (ii) the risk-free interest rate, (iii) the expected dividend yield, (iv) expected volatility of the price of the underlying series seed convertible preferred stock and (v) the fair value of the series seed convertible preferred stock on the valuation date. The Company estimated the fair value per share of the underlying series seed convertible preferred stock based, in part, on the results of third-party valuations and additional factors deemed relevant. The risk-free interest rate was determined by reference to the U.S. Treasury yield curve for time periods approximately equal to the remaining contractual term of the warrants. The Company estimated a 0% expected dividend yield based on the fact that the Company has never paid or declared dividends and does not intend to do so in the foreseeable future. Prior to July 2018, the Company was a private company and accordingly, lacked company-specific historical and implied volatility information of its stock, the expected stock volatility was based on the historical volatility of publicly traded peer companies for a term equal to the remaining expected term of the warrants.

Based on the terms and conditions of the warrant, upon closing of the Company’s IPO in July 2018, the warrant to purchase shares of the Company’s series seed convertible preferred stock was converted into a warrant to purchase shares of the Company’s common stock. On that date, the Company remeasured the warrant liability to fair value and reclassified the total carrying value to additional paid-in capital. The Company performed the final remeasurement of the warrant liability using the IPO price of $15.00 per share and recorded the change in fair value as a component of total other income (expense), net in the consolidated statement of operations.

The following assumptions were used to measure the fair market value of the warrant liability upon the conversion date:

	Nine Months
	Ended
	December 31,
	2018
Risk-free interest rate		2.81	%
Expected dividend yield		0	%
Expected term (in years)		7.2
Expected volatility		64.4	%
Fair value of series seed preferred stock	$	15.00

The following table presents a roll forward of the warrant liability:

	Warrant
	Liability
Balance at March 31, 2018	$	1,642
Change in fair value		5,452
Conversion of convertible preferred stock warrant into common stock warrant		(7,094)
Balance at December 31, 2018	$	—

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Commitments and contingencies - Lease agreements (Details) $ in Thousands			1 Months Ended				3 Months Ended	9 Months Ended		30 Months Ended
	Oct. 22, 2019 USD ($) ft²	Aug. 01, 2019 USD ($) ft²	Jun. 30, 2019 USD ($) ft²	Jun. 30, 2018 USD ($) ft² Option	Apr. 30, 2016	Dec. 31, 2015 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2019 USD ($)	Apr. 01, 2019 USD ($)	Mar. 31, 2019 USD ($)
Lease agreements
Number of options to extend lease agreement (in years)						5 years
Monthly lease payments, inclusive of base rent and ancillary charges						$ 7
Prior notice period upon termination of lease					9 months
Base rent of monthly lease payments									$ 23	$ 31
Leased office space | ft²	53,000	10,500	18,700	63,000
Rentable office space | ft²				106,000
Lease term			10 years	10 years						10 years
Number of options to renewal the lease | Option				2
Renewal period of lease			5 years	5 years						5 years
Annual rental payment			$ 488	$ 2,373
Percentage of annual increase in lease rental expenses			1.60%	3.00%						1.60%
Property, plant and equipment, net							$ 5,654	$ 5,654				$ 12,159
Financing obligation												6,561
Right-to-use asset	$ 18,425	$ 2,368					4,731	4,731
Right-to-use liability			$ 4,363				4,897	4,897		$ 4,363
Operating lease, remained payable							516
ASU 2016-02
Lease agreements
Property, plant and equipment, net											$ 645
Long term prepaid rent											5,006
Right-to-use asset											789
Right-to-use liability											$ 837
General and administrative expenses
Lease agreements
Finance Lease Cost							90	149
Research and development expenses
Lease agreements
Finance Lease Cost							$ 517	$ 517
Leasehold improvements
Lease agreements
Property, plant and equipment, net												$ 11,514

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Stock Based Compensation - Classification of expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Share-Based Compensation
Stock-based compensation expense	$ 2,344	$ 880	$ 5,935	$ 1,823
Total unrecognized compensation cost	18,483		$ 18,483
Expenses expected to be recognized over a weighted average remaining period			2 years 8 months 12 days
Research and development expenses
Share-Based Compensation
Stock-based compensation expense	1,318	473	$ 2,974	989
General and administrative expenses
Share-Based Compensation
Stock-based compensation expense	$ 1,026	$ 407	$ 2,961	$ 834

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Geographic Information (Tables)

9 Months Ended

Dec. 31, 2019

Geographic Information

Summary of company's long-lived assets held in different geographic regions

	December 31, 2019		March 31, 2019
United States	$	5,136	$	11,648
United Kingdom		518		511
	$	5,654	$	12,159

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Fair value of financial assets and liabilities - Unobservable inputs of the warrant liability (Details)	Dec. 31, 2018 $ / shares	Jul. 30, 2018 $ / shares	Jul. 24, 2018 $ / shares
Initial public offering
Unobservable inputs of the warrant liability
Fair value of series seed preferred stock (in price per share)	$ 15.00	$ 15.00	$ 15.00
Risk-free interest rate
Unobservable inputs of the warrant liability
Warrant liability inputs	2.81
Expected dividend yield
Unobservable inputs of the warrant liability
Warrant liability inputs	0
Expected term
Unobservable inputs of the warrant liability
Warrant liability inputs	7.2
Expected volatility
Unobservable inputs of the warrant liability
Warrant liability inputs	64.4

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Accrued expenses and other current liabilities

9 Months Ended

Dec. 31, 2019

Accrued expenses and other current liabilities.

Accrued expenses and other current liabilities

6.           Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following:

	December 31,		March 31,
	2019		2019
Accrued research and development costs	$	1,416	$	530
Accrued compensation and benefits costs		2,099		1,510
Accrued professional fees		697		464
Deferred rent		—		24
Other		345		273
	$	4,557	$	2,801

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CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEICIT (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Sep. 30, 2018
Prefunded common stock warrants
Issuance costs and underwriter fees	$ 1,797
Common stock | Follow-on public offering
Issuance costs and underwriter fees	$ 4,017
Common stock | Initial public offering
Issuance costs and underwriter fees		$ 9,935

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2019	Mar. 31, 2019
CONDENSED CONSOLIDATED BALANCE SHEETS
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized	150,000,000	150,000,000
Common stock, issued	36,645,650	31,656,950
Common stock, outstanding	36,645,650	31,656,950

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Summary of significant accounting policies

9 Months Ended

Dec. 31, 2019

Summary of significant accounting policies

Summary of significant accounting policies

2.           Summary of significant accounting policies

Principles of consolidation

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, and include the accounts of the Company and its wholly owned subsidiaries, Replimune UK, Replimune US and Replimune Securities Corporation, after elimination of all intercompany accounts and transactions. The consolidated financial statements reflect the capital as if Replimune Group, Inc. had been in existence for all periods presented.

Use of estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting periods. Significant estimates and assumptions reflected in these consolidated financial statements include, but are not limited to, the accrual for research and development expenses and the valuation of common stock and stock‑based awards. The Company bases its estimates on historical experience, known trends and other market‑specific or other relevant factors that it believes to be reasonable under the circumstances. Estimates are periodically reviewed in light of reasonable changes in circumstances, facts and experience. Changes in estimates are recorded in the period in which they become known. Actual results could differ from those estimates or assumptions.

Unaudited interim financial information

The accompanying consolidated balance sheet as of December 31, 2019, the consolidated statements of operations, of comprehensive loss and of convertible preferred stock and stockholders’ equity for the three and nine months ended December 31, 2019 and 2018 and the consolidated statements of cash flows for the nine months ended December 31, 2019 and 2018 are unaudited. The unaudited interim consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of the Company’s financial position as of December 31, 2019 and the results of its operations for the three and nine months ended December 31, 2019 and 2018. The financial data and other information disclosed in these consolidated notes related to the three and nine months ended December 31, 2019 and 2018 are unaudited. The results for the three and nine months ended December 31, 2019 are not necessarily indicative of results to be expected for the year ending March 31, 2020, any other interim periods or any future year or period. The financial information included herein should be read in conjunction with the financial statements and notes in the Company's Annual Report on Form 10-K for the year ended March 31, 2019.

During the three and nine months ended December 31, 2019, there have been no changes to the Company’s significant accounting policies as described in the Company's Annual Report on Form 10-K for the year ended March 31, 2019, except as described below.

Debt Issuance Costs

Debt issuance costs consist of payments made to secure commitments under certain debt financing arrangements. These amounts are recognized as interest expense over the period of the financing arrangement using the effective interest method. If the financing arrangement is canceled or forfeited, or if the utility of the arrangement to the Company is otherwise compromised, these costs are recognized as interest expense immediately. The Company's condensed consolidated financial statements present debt issuance costs related to a recognized debt liability as a direct reduction from the carrying amount of that debt liability.

Recently Adopted Accounting Pronouncements

In June 2018, the FASB issued Accounting Standards Updates (“ASU” ) No. 2018-07, Compensation - Stock Compensation (Topic 718):Improvements to Nonemployee Share-Based Payment Accounting (“ASU 2018-07”). ASU 2018-17 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. ASU 2018-17 also clarifies that Topic 718 does not apply to share-based payments used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Revenue from Contracts with Customers (Topic 606).  The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is permitted. The Company adopted ASU 2018-17 on April 1, 2019.  The adoption of ASU 2018-17 did not have a material impact on the Company’s consolidated financial statements.

In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815) I. Accounting for Certain Financial Instruments with Down Round Features II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception (“ASU 2017-11”). Part I applies to entities that issue financial instruments such as warrants, convertible debt or convertible preferred stock that contain down-round features. Part II replaces the indefinite deferral for certain mandatorily redeemable noncontrolling interests and mandatorily redeemable financial instruments of nonpublic entities contained within Accounting Standards Codification (“ASC”) Topic 480 with a scope exception and does not impact the accounting for these mandatorily redeemable instruments. ASU 2017-11 is required to be adopted for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted ASU 2017-11 on April 1, 2019. The adoption of ASU 2017-11 did not have a material impact on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02 ("ASU 2016-02"), Leases (Topic 842), which supersedes FASB Topic 840, Leases (Topic 840) and provides principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases. In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842) Land Easement Practical Expedient for Transition to Topic 842, which amends ASU 2016-02 to provide entities an optional transition practical expedient to not evaluate under Topic 842 existing or expired land easements that were not previously accounted for as leases under the current leases guidance in Topic 842. An entity that elects this practical expedient should evaluate new or modified land easements under Topic 842 beginning at the date that the entity adopts Topic 842. In July 2018, the FASB also issued ASU 2018-11, Leases (Topic 842): Targeted Improvements, which provides an optional transition method that allows entities to elect to apply the standard prospectively at its effective date, versus recasting the prior periods presented.

The Company adopted ASU 2016-02, as amended, on April 1, 2019, which supersedes the current leasing guidance and upon adoption, requires lessees to recognize right-of-use assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. Upon the adoption of the guidance, operating leases are capitalized on the balance sheet at the present value of lease payments. The balance sheet amount recorded for existing leases at the date of adoption of ASU 2016-02 was calculated using the applicable incremental borrowing rate at the date of adoption.

The Company adopted ASU 2016-02, including several practical expedients on April 1, 2019. The Company elected the available package of practical expedients, which allows the Company to not reassess previous accounting conclusions around whether arrangements are or contain leases, the classification of leases, and the treatment of initial direct costs. The Company also made an accounting policy election to utilize the short-term lease exemption, whereby leases with a term of 12 months or less will not follow the recognition and measurement requirements of the new standard. Upon adoption, the Company recognized total right-of-use assets of $789, with corresponding liabilities of $837 on the consolidated balance sheets. Additionally,  the Company derecognized $11,514 of construction in progress assets and $6,561 of financing obligations and recorded long term prepaid rent of $5,006 on the consolidated balance sheet (see Note 12).

The following table summarizes the financial impact on the Company’s condensed consolidated balance sheet upon the adoption of ASU 2016-02 and the cumulative effect adjustment on April 1, 2019:

	March31,2019		Adjustments		April1,2019
Property, plant, and equipment, net	$	12,159	$	(11,514)	$	645
Right-to-use asset	$	—	$	789	$	789
Long term prepaid rent	$	—	$	5,006	$	5,006
Lease liabilities, current	$	—	$	388	$	388
Lease liabilities, non-current	$	—	$	449	$	449
Accrued expenses	$	2,801	$	(24)	$	2,777
Deferred rent, net of current portion	$	24	$	(24)	$	—
Financing obligation	$	6,561	$	(6,561)	$	—
Accumulated deficit	$	(59,766)	$	93	$	(59,673)

Recently Issued Accounting Pronouncements

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). The amendments in this ASU require certain existing disclosure requirements in Topic 820 to be modified or removed, and certain new disclosure requirements to be added to the Topic. In addition, this ASU allows entities to exercise more discretion when considering fair value measurement disclosures. ASU 2018-13 will be effective for the Company beginning April 1, 2020 with early adoption permitted. The Company is in the process of evaluating the impact of ASU 2018-13 on its consolidated financial statements and disclosures.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments- Credit Losses (Topic 326). The standard changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. Financial assets measured at amortized cost will be presented at the net amount expected to be collected by using an allowance for credit losses. In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments, which clarifies and corrects certain unintended applications of the guidance contained in each of the amended Topics. Additionally, in May 2019, the FASB issued ASU No. 2019-05, Financial Instruments – Credit Losses (Topic 326), which provides an option to irrevocably elect to measure certain individual financial assets at fair value instead of amortized cost. The standard is effective for fiscal years and interim periods beginning after December 15, 2019. Early adoption is permitted for all periods beginning after December 15, 2018. The Company is currently in the process of evaluating the impact the standard will have on its consolidated financial statements.

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Net loss per share

9 Months Ended

Dec. 31, 2019

Net loss per share

Net loss per share

10.         Net loss per share

Basic and diluted net loss per share attributable to common stockholders was calculated as follows:

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2019		2018		2019		2018
Numerator:
Net loss attributable to common stockholders	$	(16,189)	$	(7,673)	$	(36,836)	$	(24,178)
Denominator:
Weighted average common shares outstanding, basic and diluted		34,877,944		31,577,313		32,742,148		20,433,580
Net loss per share attributable to common stockholders, basic and diluted	$	(0.46)	$	(0.24)	$	(1.13)	$	(1.18)

Included within weighted average common shares outstanding are common shares issuable upon the exercise of the pre-funded warrants as the warrants are exercisable at any time for nominal consideration, and as such, the shares are considered outstanding for the purpose of calculating  basic and diluted net loss per share attributable to common stockholders.

The Company’s potentially dilutive securities, which include stock options  and warrants to purchase shares of series seed preferred stock, have been excluded from the computation of diluted net loss per share as the effect would be to reduce the net loss per share. Common A stock has been excluded from the computation of diluted net loss per share because the shares have nominal economic participation rights. Therefore, the weighted average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same. The Company excluded the following potential common shares, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti‑dilutive effect:

	Three and Nine Months Ended
	December 31,
	2019	2018
Options to purchase common stock	4,916,402	3,673,535
Warrants to purchase convertible preferred stock (as converted to common stock)	497,344	497,344
	5,413,746	4,170,879

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Significant agreements (Details) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Jan. 31, 2020 item	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)
Significant agreements
Prepaid expenses and other current assets		$ 5,220	$ 5,220	$ 3,696
Regeneron Pharmaceuticals, Inc
Significant agreements
Payments received under the terms of the agreement		760	2,008
Prepaid expenses and other current assets		$ 1,017	$ 1,017	$ 337
Bristol-Myers Squibb Company [Member]
Significant agreements
Number Of Patients | item	125

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Stock Based Compensation - Stock option activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Number of Shares
Outstanding at beginning of the period (in shares)			3,721,784
Granted (in shares)			1,515,535
Exercised (in shares)			(184,580)
Cancelled (in shares)			(136,337)
Outstanding at end of the period (in shares)	4,916,402		4,916,402		3,721,784
Options exercisable (in shares)	1,924,564		1,924,564		1,278,930
Weighted Average Exercise Price
Outstanding at beginning of the period (in dollars per share)			$ 7.14
Granted (in dollars per share)			15.00
Exercised (in dollars per share)			2.60
Cancelled (in dollars per share)			11.26
Outstanding at end of the period (in dollars per share)	$ 9.46		9.46		$ 7.14
Options exercisable (in dollars per share)	$ 5.33		$ 5.33		$ 2.51
Weighted Average Contractual Term (Years)
Outstanding (years)			8 years 2 months 12 days		8 years 7 months 10 days
Granted (years)			9 years 4 months 28 days
Options exercisable (years)			7 years 4 months 24 days		7 years 9 months
Aggregate Intrinsic Value
Outstanding at beginning of the period			$ 30,150
Outstanding at end of the period	$ 26,959		26,959		$ 30,150
Options exercisable	17,650		17,650		$ 16,249
Total fair value of options vested	$ 1,063	$ 211	$ 4,480	$ 1,042
Outstanding unvested service-based stock options	0		0

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Subsequent Events (Details)-ol	1 Months Ended
	Jan. 31, 2020 item
Subsequent events
Subsequent Event [Line Items]
Number Of Patients	125

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Commitments and contingencies - Future annual minimum lease payment commitments (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Commitments and contingencies
2020	$ 2,062
2021	2,901
2022	2,493
2023	2,568
2024	2,645
2025	2,725
Thereafter	12,770
Total	$ 28,164

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Long-Term Debt - Hercules Loan Agreement (Details) $ in Thousands		1 Months Ended	3 Months Ended	5 Months Ended	9 Months Ended
	Aug. 08, 2019 USD ($) item	Aug. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Debt Securities
Unamortized debt discount			$ 261	$ 261	$ 261
Long Term Debt Due Charges					495
Term Loan Agreement
Debt Securities
Maximum borrowing capacity	$ 30,000
Borrowed amount	10,000
Facility charge	225
Additional closing and legal fees	130
Unused borrowing capacity available under the facility	$ 20,000
Number of separate advances available to be borrowed under the unused facility | item	2
Interest rate		8.75%
Term (in years)		4 years
Percentage of prepayment charge payable within the first twelve months		3.00%
Percentage of prepayment charge payable after twelve months but prior to twenty four months		2.00%
Percentage of prepayment charge payable anytime thereafter		1.00%
Percentage of charge Payable on aggregate debt amount		4.95%
Upfront fees, including closing costs and legal fees		$ 355
Interest expense			302		376
Non-cash interest expense related to accretion of the debt discount			81		94
Unamortized debt discount			261	$ 261	261
Interest Rate				10.10%
Principal payments due or paid			$ 0	$ 0	$ 0
Term loan agreement, second advance
Debt Securities
Maximum borrowing capacity	$ 10,000
Term loan agreement, third advance
Debt Securities
Maximum borrowing capacity	$ 10,000
Prime Rate | Term Loan Agreement
Debt Securities
Variable interest rate		2.75%

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Stockholders' Equity - Preferred stock warrants (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Jul. 24, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Preferred stock warrants
Loss from change in fair value of the warrant liability					$ 5,452
Series seed preferred stock
Preferred stock warrants
Number of preferred stock warrants issued		50,000		50,000
Exercise price (in dollars per share)		$ 10.00		$ 10.00
Fair value of the warrants to purchase shares of series seed preferred stock		$ 391		$ 391
Preferred stock warrants, exercisable	497,344
Other income (expense), net
Preferred stock warrants
Loss from change in fair value of the warrant liability		$ 0	$ 0	$ 0	$ (5,452)

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Short-term investments (Tables)

9 Months Ended

Dec. 31, 2019

Short-term investments

Schedule of short-term investments

	December 31, 2019
			Gross unrealized		Gross unrealized
	Amortized cost		gains		losses		Fair value
Commercial paper	$	42,148	$	24	$	—	$	42,172
US Government agency bonds		13,045		—		(9)		13,036
US Treasury bonds		28,107		—		(2)		28,105
Corporate debt securities		34,562		5		(3)		34,564
	$	117,862	$	29	$	(14)	$	117,877

	March 31, 2019
			Gross unrealized		Gross unrealized
	Amortized cost		gains		losses		Fair value
Commercial paper	$	46,687	$	2	$	(2)	$	46,687
US Government agency bonds		15,889		4		—		15,893
US Treasury bonds		38,047		13		—		38,060
Corporate debt securities		8,469		—		(2)		8,467
	$	109,092	$	19	$	(4)	$	109,107

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Subsequent Events

9 Months Ended

Dec. 31, 2019

Subsequent Events

Subsequent Events

14.         Subsequent Events 

Agreement with Bristol- Myers Squibb Company

In January 2020, the Company and BMS expanded the scope of the Clinical Trial Collaboration and Supply Agreement to provide that BMS will supply to the Company, at no cost, nivolumab for use in combination with RP1 in an additional cohort of 125 patients with anti-PD1 refractory melanoma.

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Stockholders' Equity

9 Months Ended

Dec. 31, 2019

Stockholders' Equity

Stockholders' Equity

8.           Stockholders’ Equity

Common Stock

As of December 31, 2019 and March 31, 2019, the Company’s certificate of incorporation, as amended and restated, authorized the Company to issue up to 150,000,000 shares of common stock, par value $0.001 per share.

As of December 31, 2019 and March 31, 2019, the Company had reserved 10,472,126 and 6,873,744 shares of common stock for the exercise of outstanding stock options, the number of shares remaining available for grant under the Company's 2018 Omnibus Incentive Compensation Plan and the Company's Employee Stock Purchase Plan (see Note 9) and the exercise of the outstanding warrants to purchase shares of common, respectively.

Undesignated Preferred Stock

As of December 31, 2019 and March 31, 2019, the Company’s certificate of incorporation, as amended and restated, authorized the Company to issue up to 10,000,000 shares of undesignated preferred stock, par value $0.001 per share.  There were no undesignated preferred shares issued or outstanding as of December 31, 2019 or March 31, 2019.

Convertible Preferred Stock

The Company has issued series seed convertible preferred stock (the “series seed preferred stock”), series A convertible preferred stock (the “series A preferred stock”) and series B convertible preferred stock (the “series B preferred stock”). The series seed preferred stock, series A preferred stock and series B preferred stock are collectively referred to as the “preferred stock.”  In connection with the closing of the IPO, the preferred stock converted into 19,157,360 shares of common stock on a 1:9.94688 basis. There was no preferred stock outstanding as of December 31, 2019.

Preferred Stock Warrants

In connection with the issuance of the series seed preferred stock, the Company issued to the holders of the series seed preferred stock warrants for the purchase of 50,000 shares of series seed preferred stock, which became fully vested and exercisable in the year of issuance. The warrants to purchase shares of series seed preferred stock were issued at an exercise price of $10.00 per share and expire on the earlier of September 16, 2025 or a qualified change of control event.

The issuance date fair value of the warrants to purchase shares of series seed preferred stock was $391 and was recorded as a liability with a corresponding reduction in the carrying value of the series seed preferred stock. The Company did not recognize any losses for the change in fair value of warrant liability within total other income (expense), net in the consolidated statements of operations for the three and nine months ended December 31, 2019, related to the change in fair value of the warrant liability. The Company recognized a loss of $0 and $(5,452) in change in fair value of warrant liability within total other income (expense), net in the consolidated statements of operations for the three and nine months ended December 31,2018, respectively, related to the change in fair value of the warrant liability.

Upon the closing of the Company’s IPO in July 2018, all outstanding convertible preferred stock was converted into common stock and the series seed preferred stock warrants became exercisable for 497,344 shares of common stock instead of series seed preferred stock. As a result, the warrant liability was remeasured a final time on the closing date of the IPO and reclassified to stockholders’ equity.

ATM Program

In August 2019, the Company entered into a Sales Agreement (the “Sales Agreement”) with SVB Leerink LLC (the “Agent”), pursuant to which the Company may sell, from time to time, at its option, up to an aggregate amount of $75,000 of shares of the Company’s common stock, $0.001 par value per share (the “Shares”) , through the Agent, as the Company’s sales agent.

Any Shares to be offered and sold under the Sales Agreement will be issued and sold (i) by methods deemed to be an “at the market offering” (“ATM”), as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended or in negotiated transactions, if authorized by the Company, and (ii) pursuant to, and only upon the effectiveness of, a registration statement on Form S-3 filed by the Company with the Securities and Exchange Commission on August 8, 2019 for an offering of up to $250,000 of various securities, including shares of the Company’s common stock, preferred stock, debt securities, warrants and/or units for sale to the public in one or more public offerings.

Subject to the terms of the Sales Agreement, the Agent will use commercially reasonable efforts to sell the Shares from time  to time, based upon the Company's  instructions (including any price, time or size limits or other customary parameters or conditions the Company may impose). The Company will pay the Agent a commission of 3.0% of the gross proceeds from the sale of the Shares, if any. During the nine months ended December 31, 2019, the Company has issued and sold 287,559 shares of common stock for  gross proceeds of $4,568 less offering fees of $137 for net proceeds of $4,431 under the ATM program.

Equity offerings

In November 2019, the Company entered into an underwriting agreement (the “Underwriting Agreement”) with J.P. Morgan Securities LLC and SVB Leerink LLC, as representatives of the several underwriters named therein (the “Underwriters”), relating to the issuance and sale of an aggregate of (a) 3,678,031 shares of the Company’s common stock (the “Shares”), and (b) pre-funded warrants to purchase 2,200,000 shares of the Company’s common stock (the “Pre-Funded Warrants”) to the Underwriters (the “Offering”). The Shares were sold to the purchasers at the public offering price of $13.61 per share. The Pre-Funded Warrants were sold at a public offering price of $13.6099 per Pre-Funded Warrant, which represents the per share public offering price for the Company’s common stock less a $0.0001 per share exercise price for each such Pre-Funded Warrant. Pursuant to the Underwriting Agreement, the Company also granted the Underwriters a 30-day option to purchase up to 881,704 additional shares of its common stock. In December 2019, the Underwriters partially exercised their purchase option and the Company issued and sold an additional 838,530 shares of its common stock.  The Company received aggregate net proceeds of approximately $85,598 after deducting underwriting discounts, commissions and other offering expenses payable by the Company of approximately $5,814.

The Pre-Funded Warrants are exercisable at any time after the date of issuance. A holder of Pre-Funded Warrants may not exercise the warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of the Company’s common stock outstanding immediately after giving effect to such exercise. A holder of Pre-Funded Warrants may increase or decrease this percentage by providing at least 61 days’ prior notice to the Company.  As of December 31, 2019, none of the warrants had been exercised.

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net loss	$ (16,189)	$ (7,673)	$ (36,836)	$ (24,178)
Other comprehensive income (loss):
Foreign currency translation gain (loss)	408	(102)	8	(1,088)
Net unrealized loss on short-term investments, net of tax	(25)	(55)		(54)
Comprehensive loss	$ (15,806)	$ (7,830)	$ (36,828)	$ (25,320)

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Document and Entity Information - shares	9 Months Ended
	Dec. 31, 2019	Feb. 10, 2020
Document And Entity Information
Entity Registrant Name	REPLIMUNE GROUP, INC.
Entity Central Index Key	0001737953
Document Type	10-Q
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		36,645,650
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3

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Short-term investments

9 Months Ended

Dec. 31, 2019

Short-term investments

Short-term investments

4.           Short‑term investments

Short‑term investments by investment type consisted of the following:

	December 31, 2019
			Gross unrealized		Gross unrealized
	Amortized cost		gains		losses		Fair value
Commercial paper	$	42,148	$	24	$	—	$	42,172
US Government agency bonds		13,045		—		(9)		13,036
US Treasury bonds		28,107		—		(2)		28,105
Corporate debt securities		34,562		5		(3)		34,564
	$	117,862	$	29	$	(14)	$	117,877

	March 31, 2019
			Gross unrealized		Gross unrealized
	Amortized cost		gains		losses		Fair value
Commercial paper	$	46,687	$	2	$	(2)	$	46,687
US Government agency bonds		15,889		4		—		15,893
US Treasury bonds		38,047		13		—		38,060
Corporate debt securities		8,469		—		(2)		8,467
	$	109,092	$	19	$	(4)	$	109,107

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Nature of the business

9 Months Ended

Dec. 31, 2019

Nature of the business

Nature of the business

1.           Nature of the business

Replimune Group, Inc. (the “Company”) is a clinical‑stage biotechnology company focused on the development of oncolytic immunotherapies to treat cancer.

Replimune Limited (“Replimune UK”) was incorporated in 2015 under the laws of England, and was the sole shareholder of Replimune, Inc. (“Replimune US”), a Delaware corporation. On July 5, 2017, Replimune Group, Inc., a Delaware corporation, was incorporated and on July 10, 2017 the shareholders of Replimune UK effected a share‑for‑share exchange pursuant to which they exchanged their outstanding shares in Replimune UK for shares in Replimune Group, Inc., on a one‑for‑one basis. In addition, the holders of warrants and stock options to purchase Replimune UK capital stock canceled their warrants to purchase shares of series seed convertible preferred stock and stock options in Replimune UK and were issued replacement warrants to purchase shares of series seed convertible preferred stock and stock options to acquire Replimune Group, Inc. capital stock on a one‑for‑one basis. These transactions are collectively referred to as the reorganization. Upon completion of the reorganization, the historical consolidated financial statements of Replimune UK became the historical consolidated financial statements of Replimune Group, Inc. because the reorganization was accounted for similar to a reorganization of entities under common control due to the high degree of common ownership of Replimune UK and Replimune Group, Inc. and lack of economic substance to the transaction. The Company concluded that the reorganization resulted in no change in the material rights and preferences of each respective class of equity interests and no change in the fair value of each respective class of equity interests before and after the reorganization. On December 8, 2017, Replimune UK transferred all outstanding shares of its wholly owned subsidiary, Replimune US to Replimune Group, Inc. Replimune Group. Inc., a Delaware corporation, is the sole shareholder of Replimune UK, Replimune US and Replimune Securities Corporation, a Massachusetts corporation that was incorporated in November 2017.

The Company is subject to risks and uncertainties common to early‑stage companies in the biotechnology industry, including, but not limited to, development by competitors of new technological innovations, dependence on key personnel, protection of proprietary technology, compliance with government regulations and the ability to secure additional capital to fund operations. Product candidates currently under development will require significant additional research and development efforts, including preclinical and clinical testing and regulatory approval, prior to commercialization. These efforts require significant amounts of additional capital, adequate personnel and infrastructure and extensive compliance and reporting capabilities. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will realize significant revenue from product sales.

Forward stock split

On July 9, 2018, the Company effected a l -for-9.94688 forward stock split of its issued and outstanding shares of common stock and a proportional adjustment to the existing conversion ratios for each series of the Company’s Convertible Preferred Stock (see Note 8). Accordingly, all share and per share amounts for all periods presented in the accompanying consolidated financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect this forward stock split and adjustment of the convertible preferred stock conversion ratios. Further, on July 9, 2018, the Company’s authorized shares of common stock were increased to 27,314,288. Accordingly, the authorized shares of common stock presented in the accompanying consolidated financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect the newly authorized shares of common stock.

Initial public offering

On July 24, 2018, the Company completed an initial public offering (“IPO”) of its common stock and issued and sold 6,700,000 shares of common stock at a public offering price of $15.00 per share, resulting in net proceeds of $93,465 after deducting underwriting discounts and commissions but before deducting offering costs of $2,157.  

Upon closing of the IPO, the Company’s outstanding convertible preferred stock automatically converted into shares of common stock (see Note 8). Upon conversion of the convertible preferred stock, the Company reclassified the carrying value of the convertible preferred stock to common stock and additional paid-in capital.  The warrant to purchase shares of the Company’s series seed convertible preferred stock was converted into a warrant to purchase shares of the Company’s common stock upon the closing of the IPO. As a result, the warrant liability was remeasured a final time on the closing date of the IPO and reclassified to stockholders’ equity. Additionally, the Company repurchased 26,258 shares of class A common stock at a price equal to its par value upon the closing of the IPO.

On July 30, 2018, the Company issued and sold an additional 707,936 shares of its common stock at the IPO price of $15.00 per share pursuant to the underwriters’ partial exercise of their option to purchase additional shares of common stock, resulting in additional net proceeds of $9,876 after deducting discounts and commissions and other offering expenses.

Also, in connection with the completion of its IPO on July 24, 2018, the Company filed an amended and restated certificate of incorporation with the Secretary of State of the State of Delaware to authorize the issuance of up to 150,000,000 shares of common stock, par value $0.001 per share, and 10,000,000 shares of undesignated preferred stock, par value $0.001 per share.

Basis of presentation

The accompanying consolidated financial statements have been prepared on the basis of continuity of operations, realization of assets and the satisfaction of liabilities and commitments in the ordinary course of business. The Company has incurred recurring losses since its inception, including net losses of $16,189 and $7,673 for the three months ended December 31, 2019 and 2018, respectively and net losses of $36,836 and $24,178 for the nine months ended December 31, 2019 and 2018, respectively. In addition, as of December 31, 2019, the Company had an accumulated deficit of $96,509. The Company expects to continue to generate operating losses for the foreseeable future. As of February 13, 2020, the issuance date of these consolidated financial statements, the Company expects that its cash and cash equivalents and short-term investments will be sufficient to fund its operating expenses and capital expenditure requirements through at least 12 months from the issuance of the condensed consolidated financial statements. The future viability of the Company beyond that point is dependent on its ability to raise additional capital to finance its operations.

If the Company is unable to obtain funding it could be forced to delay, reduce or eliminate some or all of its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects, or it may be unable to continue operations. Although management continues to pursue these plans, there is no assurance that the Company will be successful in obtaining sufficient funding on terms acceptable to the Company to fund continuing operations, if at all.

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Net loss per share (Tables)

9 Months Ended

Dec. 31, 2019

Net loss per share

Schedule of calculation of basic and diluted net loss per share attributable to common stockholders

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2019		2018		2019		2018
Numerator:
Net loss attributable to common stockholders	$	(16,189)	$	(7,673)	$	(36,836)	$	(24,178)
Denominator:
Weighted average common shares outstanding, basic and diluted		34,877,944		31,577,313		32,742,148		20,433,580
Net loss per share attributable to common stockholders, basic and diluted	$	(0.46)	$	(0.24)	$	(1.13)	$	(1.18)

Schedule of anti-dilutive securities excluded from the computation of diluted net loss per share attributable to common shareholders

	Three and Nine Months Ended
	December 31,
	2019	2018
Options to purchase common stock	4,916,402	3,673,535
Warrants to purchase convertible preferred stock (as converted to common stock)	497,344	497,344
	5,413,746	4,170,879

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Summary of significant accounting policies (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Oct. 22, 2019	Aug. 01, 2019	Jun. 30, 2019	Apr. 01, 2019	Mar. 31, 2019
Recently adopted accounting pronouncements
Right-to-use liability	$ 4,897			$ 4,363
Property, plant and equipment, net	5,654					$ 12,159
Right-to-use asset	4,731	$ 18,425	$ 2,368
Lease liabilities, current	1,011
Lease liabilities, non-current	3,886
Accrued expenses	4,557					2,801
Deferred rent, net of current portion						24
Financing obligation						6,561
Accumulated deficit	$ (96,509)					$ (59,766)
ASU 2016-02
Recently adopted accounting pronouncements
Right-to-use liability					$ 837
Property, plant and equipment, net					645
Right-to-use asset					789
Long term prepaid rent					5,006
Lease liabilities, current					388
Lease liabilities, non-current					449
Accrued expenses					2,777
Accumulated deficit					(59,673)
ASU 2016-02 | Adjustments
Recently adopted accounting pronouncements
Property, plant and equipment, net					(11,514)
Right-to-use asset					789
Long term prepaid rent					5,006
Lease liabilities, current					388
Lease liabilities, non-current					449
Accrued expenses					(24)
Deferred rent, net of current portion					(24)
Financing obligation					(6,561)
Accumulated deficit					$ 93

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Short-term investments (Details) - Short-term investments - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2019	Mar. 31, 2019
Short-term investments
Amortized cost	$ 117,862	$ 109,092
Gross unrealized gains	29	19
Gross unrealized losses	(14)	(4)
Fair value	117,877	109,107
Commercial paper
Short-term investments
Amortized cost	42,148	46,687
Gross unrealized gains	24	2
Gross unrealized losses		(2)
Fair value	42,172	46,687
US Government Agency bonds
Short-term investments
Amortized cost	13,045	15,889
Gross unrealized gains		4
Gross unrealized losses	(9)
Fair value	13,036	15,893
US Treasury bonds
Short-term investments
Amortized cost	28,107	38,047
Gross unrealized gains		13
Gross unrealized losses	(2)
Fair value	28,105	38,060
Corporate debt securities
Short-term investments
Amortized cost	34,562	8,469
Gross unrealized gains	5
Gross unrealized losses	(3)	(2)
Fair value	$ 34,564	$ 8,467

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Commitments and contingencies - Components of lease expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2019
Finance lease costs:
Amortization of right-of-use asset	$ 607	$ 666
Interest on lease liabilities	591	652
Operating lease costs	262	633
Total lease cost	$ 1,460	$ 1,951

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Net loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Net loss attributable to common stockholders	$ (16,189)	$ (7,673)	$ (36,836)	$ (24,178)
Denominator:
Weighted average common shares outstanding, basic and diluted (in shares)	34,877,944	31,577,313	32,742,148	20,433,580
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.46)	$ (0.24)	$ (1.13)	$ (1.18)

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Stock Based Compensation (Details) - shares			9 Months Ended
	Apr. 01, 2019	Jul. 09, 2018	Dec. 31, 2019
2017 Plan
Share based payments
Shares authorized (in shares)			2,659,885
Number of shares available for grant		2,520,247	0
Common stock reserved for issuance		131,850
2018 Plan
Share based payments
Shares authorized (in shares)		3,617,968
Number of shares available for grant			2,193,176
Common stock reserved for issuance		3,486,118
Additional shares authorized (in shares)	1,266,370
ESPP
Share based payments
Common stock reserved for issuance	665,204	348,612
Share based payment award percentage of outstanding shares		1.00%
Additional shares authorized (in shares)	316,592	697,224
Employees stock options
Share based payments
Exercise price for persons holding ten percent of voting power (as a percent)			100.00%
Exercise price for persons holding more than ten percent of voting power (as a percent)			110.00%
Share based payment award expiration period			10 years
Share based payment award vesting period			4 years
Employees stock options | Minimum
Share based payments
Expiration period for persons holding more than ten percent of voting power			10 years
Employees stock options | Maximum
Share based payments
Expiration period for persons holding ten percent of voting power			5 years

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Accrued expenses and other current liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Accrued expenses and other current liabilities.
Accrued research and development costs	$ 1,416	$ 530
Accrued compensation and benefits costs	2,099	1,510
Accrued professional fees	697	464
Deferred rent		24
Other	345	273
Total	$ 4,557	$ 2,801

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Stockholders' Equity (Details) - $ / shares	Jul. 24, 2018	Dec. 31, 2019	Mar. 31, 2019	Jul. 09, 2018
Stockholders' Equity
Shares authorized (in shares)		150,000,000	150,000,000	27,314,288
Par value (in dollars per share)		$ 0.001	$ 0.001
Repurchase of class A common stock upon closing of initial public offering (in shares)	26,258
Initial public offering
Stockholders' Equity
Shares authorized (in shares)	150,000,000
Par value (in dollars per share)	$ 0.001
Undesignated preferred stock, authorized	10,000,000	10,000,000	10,000,000
Preferred stock, Par Value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Undesignated preferred shares issued		0	0
Undesignated preferred shares outstanding		0	0
Common stock
Stockholders' Equity
Common stock reserved for the conversion of outstanding shares of preferred stock		10,472,126	6,873,744

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Stockholders' Equity - Equity offerings (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		9 Months Ended
	Dec. 31, 2019	Nov. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Class of Warrant or Right [Line Items]
Public offering price		$ 13.61
Variation between public offering prices of common stock and pre-funded warrants		$ 0.0001
Net proceeds from sale of stock	$ 85,598
Issuance costs and underwriter fees			$ 355	$ 2,157
Pre-Funded Warrants [Member]
Class of Warrant or Right [Line Items]
Issuance of pre-funded warrants		2,200,000
Pre-funded warrants exercise price		$ 13.6099
Maximum percentage of holding for exercise warrants		9.99%
Prior notice period to change percentage of holding		61 days
Underwriter rights
Class of Warrant or Right [Line Items]
Common stock sold	838,530	3,678,031
Number of days for purchase shares		30 days
Maximum additional shares to purchase		881,704
Issuance costs and underwriter fees	$ 5,814

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Commitments and contingencies - Manufacturing commitments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Commitments and contingencies
Minimum payments committed to manufacturing organization	$ 5,113	$ 4,694

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Accrued expenses and other current liabilities (Tables)

9 Months Ended

Dec. 31, 2019

Accrued expenses and other current liabilities.

Schedule of accrued expenses and other current liabilities

	December 31,		March 31,
	2019		2019
Accrued research and development costs	$	1,416	$	530
Accrued compensation and benefits costs		2,099		1,510
Accrued professional fees		697		464
Deferred rent		—		24
Other		345		273
	$	4,557	$	2,801

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Summary of significant accounting policies (Tables)

9 Months Ended

Dec. 31, 2019

Summary of significant accounting policies

Summary of financial impact on condensed consolidated balance sheet upon the adoption of ASU 2016-02 and the cumulative effect adjustment

	March31,2019		Adjustments		April1,2019
Property, plant, and equipment, net	$	12,159	$	(11,514)	$	645
Right-to-use asset	$	—	$	789	$	789
Long term prepaid rent	$	—	$	5,006	$	5,006
Lease liabilities, current	$	—	$	388	$	388
Lease liabilities, non-current	$	—	$	449	$	449
Accrued expenses	$	2,801	$	(24)	$	2,777
Deferred rent, net of current portion	$	24	$	(24)	$	—
Financing obligation	$	6,561	$	(6,561)	$	—
Accumulated deficit	$	(59,766)	$	93	$	(59,673)

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Commitments and contingencies

9 Months Ended

Dec. 31, 2019

Commitments and contingencies

Commitments and contingencies

12.         Commitments and contingencies

Leases

In December 2015, the Company entered into a lease agreement for office space in Woburn, Massachusetts, which expires on March 30, 2021. The Company has the option to extend the lease agreement for successive periods of five years. Monthly lease payments, inclusive of base rent and ancillary charges, total $7. Monthly base rent is subject to increase each year in proportion to the Consumer Price Index.

In April 2016, the Company entered into a lease agreement for office and laboratory space in Abingdon, England, which expires on April 3, 2026. The Company has the right to terminate the lease as of April 4, 2021 upon at least nine months’ prior written notice. Monthly lease payments are inclusive of base rent, ancillary charges, non‑rent shared tenant occupancy costs and the respective value added tax to be paid. Monthly lease payments include base rent of approximately $23 through December 3, 2016 and $31 thereafter. Monthly base rent is subject to increase after April 2021 in proportion to the Retail Price Index.

In June 2018, the Company entered into an agreement to lease approximately 63,000 square feet of office, manufacturing and laboratory space within a previously occupied building with approximately 106,000 square feet of rentable space in Framingham, Massachusetts. Pursuant to the lease agreement, the lease term commenced in December 2018, subject to the landlord completing certain agreed upon landlord improvements. The rent commenced in August 2019. The initial lease term is ten years from the rent commencement date and includes two optional five-year extensions. Annual lease payments during the first year are $2,373 with increases of 3.0% each year.

Upon transition to ASC 842, the Company determined that it did not control the build-to-suit lease asset and the arrangement has been accounted for under ASC 842 guidance. Upon the adoption of ASC 842, the Company derecognized $11,514 of construction in progress and $6,561 of financing obligations and recorded long term prepaid rent of $5,006 on the consolidated balance sheet as landlord owned tenant improvements were determined to be lease payments and included as prepaid rent on the balance sheet.

Subsequent to the transition, construction was completed associated with approximately 10,500 square feet of the leased space in Framingham, Massachusetts and the Company occupied the building as office space beginning August 1, 2019. This space was determined to be a separate unit of account and is classified as a financing lease. The Company recorded a right-of-use asset and lease liability associated with the occupied space as of August 1, 2019. The right-of-use asset was recorded including $2,368 of prepaid rent of costs incurred prior to the commencement date. The Company occupied the remainder of the facility, approximately 53,000 square feet used as laboratory space, on October 22, 2019.  The Company recorded a right-of-use asset, which included prepaid rent costs of $18,425, and lease liability associated with the occupancy on October 22, 2019.

In June 2019, the Company entered into an agreement to lease approximately 18,700 square feet of office space in Woburn, Massachusetts. Pursuant to the lease agreement, the lease term commenced in August 2019.  The rent commenced in September 2019.The initial lease term is ten years from the rent commencement date and includes an optional five-year extension. Annual lease payments during the first year are $488 with increases of approximately 1.6% each year. The Company recorded a right-of-use asset and a lease liability of $4,363 upon the commencement date of the lease and the lease is classified as an operating lease.

The Company determines if an arrangement is a lease at inception. Operating leases are included in our balance sheet as right-of-use assets-operating leases, current operating lease liabilities and long-term operating lease liabilities. Finance leases are included in the balance sheet as right-of-use asset - finance lease, finance lease liabilities, current, and finance lease liabilities, non-current.Certain of the Company’s lease agreements contain renewal options; however, the Company does not recognize right-of-use assets or lease liabilities for renewal periods unless it is determined that the Company is reasonably certain of renewing the lease at inception or when a triggering event occurs. As the Company’s leases do not provide an implicit rate, the Company estimated the incremental borrowing rate in calculating the present value of the lease payments. Since the Company elected to account for each lease component and its associated non-lease components as a single combined lease component, all contract consideration was allocated to the combined lease component. Some of the Company’s lease agreements contain rent escalation clauses (including index-based escalations). The Company recognizes the minimum rental expense on a straight-line basis based on the fixed components of a lease arrangement. The Company amortizes this expense over the term of the lease beginning with the date of initial possession, which is the date the Company can enter the leased space and begin to make improvements in preparation for its intended use. Variable lease components represent amounts that are not fixed in nature and are not tied to an index or rate, and are recognized as incurred.

	Three Months Ended		Nine Months Ended
	December 31,		December 31,
	2019		2019
Lease cost
Finance lease costs:
Amortization of right-of-use asset	$	607	$	666
Interest on lease liabilities		591		652
Operating lease costs		262		633
Total lease cost	$	1,460	$	1,951

Finance lease costs of $90 and $149 are recognized in general and administrative expenses for the three and nine months ended December 31, 2019 and $517 in research and development expenses for both the three and nine months ended December 31, 2019. The following table summarizes the maturity of the Company’s lease liabilities on an undiscounted cash flow basis and a reconciliation to the operating and financing lease liabilities recognized on our balance sheet as of December 31, 2019:

	December 31, 2019
	Operating lease		Financing lease		Total
2020 (remaining three months)	$	243	$	593	$	836
2021		1,034		2,411		3,445
2022		586		2,483		3,069
2023		596		2,558		3,154
2024		605		2,634		3,239
Thereafter		3,384		46,398		49,782
Total lease payments		6,448		57,077		63,525
Less: interest		1,551		29,668		31,219
Total lease liabilities	$	4,897	$	27,409	$	32,306

The following disclosure is provided for periods prior to adoption of ASU 2016-02. Future annual minimum lease payment commitments as of March 31, 2019 were as follows, which included payments for the lease agreement in Framingham, Massachusetts which has not commenced under ASC 842, and therefore has not been recorded on the Company’s condensed consolidated balance sheet as of December 31, 2019:

2020	$	2,062
2021		2,901
2022		2,493
2023		2,568
2024		2,645
2025		2,725
Thereafter		12,770
	$	28,164

The following table provides lease disclosure as of and for the three months ended December 31, 2019:

	December 31, 2019
Leases
Right-to-use operating lease asset	$	4,731
Right-to-use finance lease asset		47,528
Total lease assets	$	52,259
Operating lease liabilities, current	$	1,011
Finance lease liabilities, current		2,393
Operating lease liabilities, non-current		3,886
Finance lease liabilities, non-current		25,016
Total lease liabilities	$	32,306
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	516
Operating cash flows from finance leases	$	623
Financing cash flows from finance leases	$	22
Right-to-use asset obtained in exchange for new operating lease liabilities	$	5,152
Right-to-use asset obtained in exchange for new financing lease liabilities	$	48,224
Variable lease costs	$	—
Short term lease costs	$	—
Weighted-average remaining lease term - operating leases		8.6	years
Weighted-average remaining lease term - financing leases		19.6	years
Weighted-average discount rate - operating leases		7	%
Weighted-average discount rate - financing leases		8	%

The variable lease costs and short-term lease costs were insignificant for the three and nine  months ended December 31, 2019.

Manufacturing commitments

The Company has entered into an agreement with a contract manufacturing organization to provide clinical trial products. As of December 31, 2019 and March 31, 2019, the Company had committed to minimum payments under these arrangements totaling $5,113 and $4,694 through March 31, 2020, respectively.

Indemnification agreements

In the ordinary course of business, the Company may provide indemnification of varying scope and terms to vendors, lessors, business partners and other parties with respect to certain matters including, but not limited to, losses arising out of breach of such agreements or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with members of its board of directors that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is, in many cases, unlimited. To date, the Company has not incurred any material costs as a result of such indemnifications. The Company is not aware of any claims under indemnification arrangements, and therefore it has not accrued any liabilities related to such obligations in its consolidated financial statements as of December 31, 2019 or March 31, 2019.

Legal Proceedings

The Company is not a party to any litigation and does not have contingency reserves established for any litigation liabilities.

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Stockholders' Equity - ATM Program (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended	9 Months Ended
	Dec. 31, 2019	Aug. 31, 2019	Dec. 31, 2019	Dec. 31, 2019	Mar. 31, 2019
Class of Warrant or Right [Line Items]
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001	$ 0.001	$ 0.001
Net proceeds	$ 85,598
ATM sales
Class of Warrant or Right [Line Items]
Issuance of stock (value)			$ 4,431
Common stock, par value (in dollars per share)		$ 0.001
Percentage Of Commission		3.00%
Common stock sold				287,559
Gross proceeds				$ 4,568
Legal fees				137
Net proceeds				$ 4,431
ATM sales | Maximum
Class of Warrant or Right [Line Items]
Issuance of stock (value)		$ 75,000
Securities offered to the public during the period		$ 250,000

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Property, plant and equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019	Mar. 31, 2019
Property, plant and equipment, net
Property, plant and equipment , gross	$ 6,249		$ 6,249			$ 12,563
Less: Accumulated depreciation and amortization	(595)		(595)			(404)
Property, plant and equipment , net	5,654		5,654			12,159
Depreciation and amortization expense	107	$ 37	191	$ 106
Financing obligation						6,561
ASU 2016-02
Property, plant and equipment, net
Property, plant and equipment , net					$ 645
Long term prepaid rent					5,006
ASU 2016-02 | Adjustments
Property, plant and equipment, net
Property, plant and equipment , net					(11,514)
Financing obligation					(6,561)
Long term prepaid rent					$ 5,006
Construction in progress
Property, plant and equipment, net
Property, plant and equipment , gross	726		726			124
Plant and laboratory equipment
Property, plant and equipment, net
Property, plant and equipment , gross	3,453		3,453			584
Leasehold improvements
Property, plant and equipment, net
Property, plant and equipment , gross	368		368			154
Property, plant and equipment , net						11,514
Computer equipment
Property, plant and equipment, net
Property, plant and equipment , gross	981		981			138
Office equipment
Property, plant and equipment, net
Property, plant and equipment , gross	$ 721		$ 721			49
Build-to-suit lease asset
Property, plant and equipment, net
Property, plant and equipment , gross						$ 11,514

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Long-Term Debt - Future payments of long-term debt (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Long-Term Debt
2022	$ 527
2023	6,558
2024	2,915
Total debt payments	$ 10,000

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Geographic Information (Details) $ in Thousands	9 Months Ended
	Dec. 31, 2019 USD ($) segment	Mar. 31, 2019 USD ($)
Geographic information
Number of operating geographic regions | segment	2
Long-lived assets	$ 5,654	$ 12,159
United States
Geographic information
Long-lived assets	5,136	11,648
United Kingdom
Geographic information
Long-lived assets	$ 518	$ 511

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Fair value of financial assets and liabilities (Tables)

9 Months Ended

Dec. 31, 2019

Fair value of financial assets and liabilities

Schedule of company's financial assets and liabilities measured at fair value on a recurring basis

	Fair Value Measurements as of
	December 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	—	$	35,853	$	—	$	35,853
Commercial paper		—		42,172		—		42,172
US Government Agency bonds		—		23,158		—		23,158
US Treasury bonds		—		28,105		—		28,105
Corporate debt securities		—		34,564		—		34,564
	$	—	$	163,852	$	—	$	163,852

	Fair Value Measurements as of
	March 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	—	$	2,676	$	—	$	2,676
Commercial paper		—		46,687		—		46,687
US Government Agency bonds		—		20,884		—		20,884
US Treasury bonds		—		41,057		—		41,057
Corporate debt securities		—		8,467		—		8,467
	$	—	$	119,771	$	—	$	119,771

Schedule of unobservable inputs of the warrant liability upon the conversion date

	Nine Months
	Ended
	December 31,
	2018
Risk-free interest rate		2.81	%
Expected dividend yield		0	%
Expected term (in years)		7.2
Expected volatility		64.4	%
Fair value of series seed preferred stock	$	15.00

Schedule of roll forward of the warrant liability

	Warrant
	Liability
Balance at March 31, 2018	$	1,642
Change in fair value		5,452
Conversion of convertible preferred stock warrant into common stock warrant		(7,094)
Balance at December 31, 2018	$	—

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Geographic Information

9 Months Ended

Dec. 31, 2019

Geographic Information

Geographic Information

13.         Geographic Information

The Company operates in two geographic regions: the United States (Massachusetts) and the United Kingdom (Oxfordshire).

Information about the Company’s long-lived assets held in different geographic regions is presented in the table below:

	December 31, 2019		March 31, 2019
United States	$	5,136	$	11,648
United Kingdom		518		511
	$	5,654	$	12,159

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Long-Term Debt (Tables)

9 Months Ended

Dec. 31, 2019

Long-Term Debt

Schedule of Long-term Debt

	December 31,
	2019
Principal amount of long-term debt	$	10,000
Unamortized debt discount		(261)
Long-term debt, net of discount	$	9,739

Schedule of future payments of long term debt

Future payments of long-term debt, as of December 31, 2019 are as follows (fiscal years):

2021	$	—
2022		527
2023		6,558
2024		2,915
Total debt payments	$	10,000

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss		$ (36,836)	$ (24,178)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	$ 2,344	5,935	1,823
Depreciation and amortization	107	191	106
Change in fair value of warrant liability			5,452
Net amortization of premiums and discounts on short-term investments		(899)	(1,171)
Noncash interest expense		94	40
Changes in operating assets and liabilities:
Research and development incentives receivable		(2,184)	340
Prepaid expenses and other current assets		(1,520)	(589)
Operating lease, right-of-use-asset		421
Finance lease, right-of-use-asset		666
Long term prepaid rent		(14,051)
Accounts payable		(2,585)	(521)
Accrued expenses and other current liabilities		1,781	(767)
Operating lease liabilities		(303)
Deferred rent			120
Net cash used in operating activities		(49,290)	(19,345)
Cash flows from investing activities:
Purchases of property, plant and equipment		(5,202)	(752)
Purchase of short-term investments		(119,611)	(134,624)
Proceed from sales and maturities of short-term investments		111,739	58,958
Net cash provided by (used in) investing activities		(13,074)	(76,418)
Cash flows from financing activities:
Proceeds from issuance of common stock in follow-on public offering, net of underwriting fees and discounts		57,453
Proceeds from issuance of prefunded warrants to purchase common stock, net of underwriting fees and discounts		28,145
Proceeds from issuance of common stock through ATM sales		4,431
Proceeds from long-term debt		10,000
Payment of issuance costs		(355)	(2,157)
Exercise of stock options		480	165
Proceeds from issuance of common stock in initial public offering, net of underwriting fees and discounts			103,341
Principal payment of finance lease obligation	(22)	(22)
Net cash provided by financing activities		100,132	101,349
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(20)	(1,009)
Net increase in cash, cash equivalents and restricted cash		37,748	4,577
Cash, cash equivalents and restricted cash at beginning of period		26,890	17,661
Cash, cash equivalents and restricted cash at end of period	64,638	64,638	22,238
Supplemental Cash Flow Information [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities		282
Supplemental disclosure of non-cash investing and financing activities:
Conversion of convertible preferred stock warrants into common stock warrants			7,094
Conversion of convertible preferred stock into common stock	28,145		86,361
Purchases of property and equipment included in accounts payable			108
Lease assets obtained in exchange for new financing lease liabilities	48,224	48,224
Lease assets obtained in exchange for new operating lease liabilities	$ 5,152	$ 5,152
Amounts capitalized under build-to-suit lease transaction			$ 4,932

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Stock-Based Compensation

9 Months Ended

Dec. 31, 2019

Stock-Based Compensation

Stock-Based Compensation

9.           Stock‑Based Compensation

2015 Enterprise Management Incentive Share Option Plan

The 2015 Enterprise Management Incentive Share Option Plan of Replimune UK (the “2015 Plan”) provided for Replimune UK to grant incentive stock options, non‑statutory stock options, stock awards, stock units, stock appreciation rights and other stock‑ based awards. Incentive stock options are granted only to the Company’s employees, including officers and directors who are also employees. Non‑statutory stock options are granted to employees, members of the board of directors, outside advisors and consultants of the Company.

2017 Equity Compensation Plan

In July 2017, in conjunction with the reorganization, the 2015 Plan was terminated, and all awards were cancelled with replacement awards issued under the 2017 Equity Compensation Plan (the “2017 Plan”). Subsequent to the reorganization, no additional grants will be made under the 2015 Plan and any outstanding awards under the 2015 Plan will continue with their original terms. The Company concluded that the cancellation of the 2015 Plan and issuance of replacement awards under the 2017 Plan was a modification with no change in the material rights and preferences and therefore no recorded change in the fair value of each respective award.

The Company’s 2017 Plan provides for the Company to grant incentive stock options or non‑statutory stock options, stock awards, stock units, stock appreciation rights and other stock‑ based awards. Incentive stock options may be granted only to the Company’s employees, including officers and directors who are also employees. Restricted stock awards and non‑statutory stock options may be granted to employees, officers, members of the board of directors, advisors and consultants of the Company. The maximum number of common shares that may be issued under the 2017 Plan was 2,659,885 as of December 31, 2019, of which 0 remained available for future grants as of December 31, 2019. Shares with respect to which awards have expired, terminated, surrendered or cancelled under the 2017 Plan without having been fully exercised will be available for future awards under the 2018 Plan. In addition, shares of common stock that are tendered to the Company by a participant to exercise an award are added to the number of shares of common stock available for the grant of awards.

2018 Omnibus Incentive Compensation Plan

On July 9, 2018, the Company’s board of directors adopted, and the Company’s stockholders approved, the 2018 Omnibus Incentive Compensation Plan (the “2018 Plan”), which became effective immediately prior to the effectiveness of the registration statement for the Company’s IPO. The 2018 Plan provides for the issuance of incentive stock options, non-qualified stock options, stock awards, stock units, stock appreciation rights and other stock-based awards. The number of shares initially reserved for issuance under the 2018 Plan is 3,617,968 shares, which is equal to the sum of (i) 3,486,118 shares of the Company’s common stock, plus (ii) the number of shares of the Company’s common stock reserved for issuance under the 2017 Plan that remain available as of the effective date of the 2018 Plan (not to exceed 131,850 shares of the Company’s common stock). If any options or stock appreciation rights, including outstanding options and stock appreciation rights granted under the 2017 Plan (up to 2,520,247 shares), terminate, expire, or are canceled, forfeited, exchanged, or surrendered without having been exercised, or if any stock awards, stock units or other stock-based awards, including outstanding awards granted under the 2017 Plan, are forfeited, terminated, or otherwise not paid in full in shares of common stock, the shares of the Company’s common stock subject to such grants will be available for purposes of our 2018 Plan. On April 1, 2019, the number of shares reserved for issuance under the 2018 Plan automatically increased by 1,266,370 shares pursuant to the terms of the 2018 Plan. As of December 31, 2019, 2,193,176 shares remained available for future grants under the 2018 Plan.

The 2015 Plan, the 2017 Plan and the 2018 Plan was administered by the board of directors or, at the discretion of the board of directors, by a committee of the board of directors. However, the board of directors shall administer and approve all grants made to non-employee directors. The exercise prices, vesting and other restrictions are determined at the discretion of the board of directors, except that the exercise price per share of incentive stock options may not be less than 100% of the fair market value of the common stock on the date of grant (or 110% of fair value in the case of an award granted to employees who hold more than 10% of the total combined voting power of all classes of stock at the time of grant) and the term of stock options may not be greater than five years for an incentive stock option granted to a 10% stockholder and greater than ten years for all other options granted. Stock options awarded under both plans expire ten years after the grant date, unless the board of directors sets a shorter term. Vesting periods for both plans are determined at the discretion of the board of directors. Incentive stock options granted to employees and non-statutory options granted to employees, officers, members of the board of directors, advisors, and consultants of the Company typically vest over four years.

Employee Stock Purchase Plan

On July 9, 2018, the Company’s board of directors adopted and the Company’s stockholders approved the Employee Stock Purchase Plan (the “ESPP”), which became effective immediately prior to the effectiveness of the registration statement for the Company’s IPO. The total shares of common stock initially reserved for issuance under the ESPP is limited to 348,612 shares. In addition, as of the first trading day of each fiscal year during the term of the ESPP (excluding any extensions), an additional number of shares of the Company’s common stock equal to 1% of the total number of shares outstanding on the last trading day in the immediately preceding fiscal year or 697,224 shares, whichever is less (or such lesser amount as determined by the Company’s board of directors) will be added to the number of shares authorized under the ESPP. In accordance, on April 1, 2019, the number of shares reserved for issuance under the ESPP automatically increased by 316,592 shares, for a total of 665,204 shares reserved for the ESPP. If the total number of shares of common stock to be purchased pursuant to outstanding purchase rights on any particular date exceed the number of shares then available for issuance under the ESPP, then the plan administrator will allocate the available shares pro-rata and refund any excess payroll deductions or other contributions to participants.

Stock option valuation

The fair value of stock option grants is estimated using the Black-Scholes option-pricing model. The Company lacks company- specific historical and implied volatility information. Therefore, it estimated its expected stock volatility based on the historical volatility of a publicly traded set of peer companies. For options with service-based vesting conditions, the expected term of the Company’s stock options has been determined utilizing the “simplified” method for awards that qualify as “plain-vanilla” options. The expected term of stock options granted to non-employees is equal to the contractual term of the option award. The risk-free interest rate is determined by reference to the U.S. Treasury yield curve in effect at the time of grant of the award for time periods approximately equal to the expected term of the award. Expected dividend yield is based on the fact that the Company has never paid cash dividends and does not expect to pay any cash dividends in the foreseeable future.

The following table presents, on a weighted-average basis, the assumptions that the Company used to determine the grant-date fair value of stock options granted to employees and directors:

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2019		2018		2019		2018
Risk-free interest rate	1.68	%	2.83	%	2.17	%	2.83	%
Expected term (in years)	6.1		6.1		6.0		6.1
Expected volatility	69.7	%	63.3	%	71.0	%	61.7	%
Expected dividend yield	0	%	0	%	0	%	0	%

Stock options

The following table summarizes the Company’s stock option activity:

		Weighted		Weighted
		Average		Average	Aggregate
	Number of	Exercise		Contractual	Intrinsic
	Shares	Price		Term (Years)	Value
Outstanding as of March 31, 2019	3,721,784	$	7.14	8.61	$	30,150
Granted	1,515,535		15.00	9.41
Exercised	(184,580)		2.60
Cancelled	(136,337)		11.26
Outstanding as of December 31, 2019	4,916,402	$	9.46	8.20	$	26,959
Options exercisable as of March 31, 2019	1,278,930	$	2.51	7.75	$	16,249
Options exercisable as of December 31, 2019	1,924,564	$	5.33	7.40	$	17,650

The aggregate intrinsic value of stock options is calculated as the difference between the exercise price of the stock options and the fair value of the Company’s common stock for those stock options that had exercise prices lower than the fair value of the Company’s common stock.

The total fair value of options vested during the three and nine months ended December 31, 2019 was $1,063 and $4,480, respectively. The total fair value of options vested during the three and nine months ended December 31, 2018 was $211 and $1,042, respectively. As of December 31, 2019, there were no outstanding unvested service‑based stock options held by non‑employees.

Stock‑Based Compensation

Stock‑based compensation expense was classified in the consolidated statements of operations as follows:

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2019		2018		2019		2018
Research and development	$	1,318	$	473	$	2,974	$	989
General and administrative		1,026		407		2,961		834
	$	2,344	$	880	$	5,935	$	1,823

As of December 31, 2019, total unrecognized compensation cost related to the unvested stock‑based awards was $18,483, which is expected to be recognized over a weighted average period of 2.70 years.

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Operating expenses:
Research and development	$ 11,948	$ 7,857	$ 27,573	$ 16,760
General and administrative	4,716	2,280	12,240	6,360
Total operating expenses	16,664	10,137	39,813	23,120
Loss from operations	(16,664)	(10,137)	(39,813)	(23,120)
Other income (expense):
Research and development incentives	951	1,577	2,192	1,937
Investment income	550	882	1,804	1,775
Interest expense	(834)		(1,029)
Change in fair value of warrant liability				(5,452)
Other income (expense)	(192)	5	10	682
Total other income (expense), net	475	2,464	2,977	(1,058)
Net loss attributable to common stockholders	$ (16,189)	$ (7,673)	$ (36,836)	$ (24,178)
Net loss per share attributable to common shareholders, basic and diluted (in dollars per share)	$ (0.46)	$ (0.24)	$ (1.13)	$ (1.18)
Weighted average common shares outstanding-basic and diluted (in shares)	34,877,944	31,577,313	32,742,148	20,433,580

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Property, plant and equipment, net

9 Months Ended

Dec. 31, 2019

Property, plant and equipment, net

Property, plant and equipment, net

5.           Property, plant and equipment, net

	December 31,		March 31,
	2019		2019
Construction in progress	$	726	$	124
Plant and laboratory equipment		3,453		584
Leasehold improvements		368		154
Computer equipment		981		138
Office equipment		721		49
Build-to-suit lease asset		—		11,514
		6,249		12,563
Less: Accumulated depreciation and amortization		(595)		(404)
	$	5,654	$	12,159

Depreciation and amortization expense was $107 and $191 for the three and nine months ended December 31, 2019, respectively, and $37 and $106 for the three and nine months ended December 31, 2018, respectively.

Build-to-suit lease asset, as of March 31, 2019, included $11,514 capitalized in connection with the Company's build-to-suit lease accounting. Upon transition to ASC 842, the Company determined that it did not control the build-to-suit lease asset and the arrangement has been accounted for under ASC 842 guidance. Upon the adoption of ASC 842, the Company derecognized $11,514 of construction in progress and $6,561 of financing obligations and recorded long term prepaid rent of $5,006 on the consolidated balance sheet (see Note 12).

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Fair value of financial assets and liabilities - Roll forward of the warrant liability (Details) - Warrant liability $ in Thousands	9 Months Ended
	Dec. 31, 2018 USD ($)
Roll forward of the warrant liability
Balance at beginning of the period	$ 1,642
Change in fair value	5,452
Conversion of convertible preferred stock warrant into common stock warrant	$ (7,094)

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Stock-Based Compensation (Tables)

9 Months Ended

Dec. 31, 2019

Stock-Based Compensation

Summary of stock option activity

		Weighted		Weighted
		Average		Average	Aggregate
	Number of	Exercise		Contractual	Intrinsic
	Shares	Price		Term (Years)	Value
Outstanding as of March 31, 2019	3,721,784	$	7.14	8.61	$	30,150
Granted	1,515,535		15.00	9.41
Exercised	(184,580)		2.60
Cancelled	(136,337)		11.26
Outstanding as of December 31, 2019	4,916,402	$	9.46	8.20	$	26,959
Options exercisable as of March 31, 2019	1,278,930	$	2.51	7.75	$	16,249
Options exercisable as of December 31, 2019	1,924,564	$	5.33	7.40	$	17,650

Schedule of stock-Based Compensation expense

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2019		2018		2019		2018
Research and development	$	1,318	$	473	$	2,974	$	989
General and administrative		1,026		407		2,961		834
	$	2,344	$	880	$	5,935	$	1,823

Employees stock options

Stock-Based Compensation

Schedule of assumptions used to determine the grant-date fair value of stock options granted

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2019		2018		2019		2018
Risk-free interest rate	1.68	%	2.83	%	2.17	%	2.83	%
Expected term (in years)	6.1		6.1		6.0		6.1
Expected volatility	69.7	%	63.3	%	71.0	%	61.7	%
Expected dividend yield	0	%	0	%	0	%	0	%

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Nature of the business (Details) $ / shares in Units, $ in Thousands					1 Months Ended	3 Months Ended						9 Months Ended
	Jul. 30, 2018 USD ($) $ / shares shares	Jul. 24, 2018 USD ($) $ / shares shares	Jul. 09, 2018 shares	Jul. 10, 2017	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($) $ / shares	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares	Mar. 31, 2019 USD ($) $ / shares shares
Shares issued in exchange of shares in Replimune Group, Inc				1
Ratio of replacement warrants to capital stock				1
Forward stock split ratio for each common stock			0.100534
Common stock, authorized | shares			27,314,288		150,000,000	150,000,000						150,000,000		150,000,000
Proceeds from issuance of common stock in initial public offering, net of underwriting fees and discounts													$ 103,341
Issuance costs and underwriter fees												$ 355	2,157
Common stock, par value (in dollars per share) | $ / shares					$ 0.001	$ 0.001						$ 0.001		$ 0.001
Repurchase of class A common stock upon closing of initial public offering (in shares) | shares		26,258
Net loss						$ (16,189)	$ (11,139)	$ (9,508)	$ (7,673)	$ (6,461)	$ (10,044)	$ (36,836)	$ (24,178)
Accumulated deficit					$ (96,509)	$ (96,509)						$ (96,509)		$ (59,766)
Initial public offering
Common stock, authorized | shares		150,000,000
Shares issued | shares		6,700,000
Shares issued price (in dollars per share) | $ / shares	$ 15.00	$ 15.00							$ 15.00				$ 15.00
Proceeds from issuance of common stock in initial public offering, net of underwriting fees and discounts		$ 93,465
Issuance costs and underwriter fees		$ 2,157
Common stock, par value (in dollars per share) | $ / shares		$ 0.001
Undesignated preferred stock, authorized | shares		10,000,000			10,000,000	10,000,000						10,000,000		10,000,000
Preferred stock, Par Value (in dollars per share) | $ / shares		$ 0.001			$ 0.001	$ 0.001						$ 0.001		$ 0.001
Underwriter rights
Shares issued | shares	707,936
Shares issued price (in dollars per share) | $ / shares	$ 15.00
Proceeds from issuance of common stock in initial public offering, net of underwriting fees and discounts	$ 9,876
Issuance costs and underwriter fees					$ 5,814

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Net loss per share - Computation of diluted net loss per share attributable to common stockholders (Details) - shares	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Diluted net loss per share attributable to common stockholders
Antidilutive securities excluded from computation of diluted weighted average shares outstanding	5,413,746	4,170,879	5,413,746	4,170,879
Options to purchase common stock
Diluted net loss per share attributable to common stockholders
Antidilutive securities excluded from computation of diluted weighted average shares outstanding	4,916,402	3,673,535	4,916,402	3,673,535
Warrant liability
Diluted net loss per share attributable to common stockholders
Antidilutive securities excluded from computation of diluted weighted average shares outstanding	497,344	497,344	497,344	497,344

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Stock Based Compensation - Assumptions to determine grant-date fair value of stock options (Details)	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Stock-Based Compensation
Risk-free interest rate	1.68%	2.83%	2.17%	2.83%
Expected term (in years)	6 years 1 month 6 days	6 years 1 month 6 days	6 years	6 years 1 month 6 days
Expected volatility	69.70%	63.30%	71.00%	61.70%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%

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Commitments and contingencies - Future lease payments under operating and financing lease liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019
Operating lease
2020 (remaining three months)	$ 243
2021	1,034
2022	586
2023	596
2024	605
Thereafter	3,384
Total lease payments	6,448
Less: interest	1,551
Total lease liabilities	4,897	$ 4,363
Financing lease
2020 (remaining three months)	593
2021	2,411
2022	2,483
2023	2,558
2024	2,634
Thereafter	46,398
Total lease payments	57,077
Less: interest	29,668
Total lease liabilities	27,409
Total
2020 (remaining three months)	836
2021	3,445
2022	3,069
2023	3,154
2024	3,239
Thereafter	49,782
Total lease payments	63,525
Less: interest	31,219
Total lease liabilities	$ 32,306