Item 7. Management’s discussion and analysis of financial condition and results of operations

You should read the following discussion and analysis of our financial condition and results of operations in conjunction with our consolidated financial statements and related notes and other financial information included elsewhere in this Annual Report on Form 10-K. In addition to historical information, some of the statements contained in this discussion and analysis or set forth elsewhere in this Annual Report on Form 10-K, 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 Annual Report on Form 10-K, particularly including those risks identified in Part I, Item 1A “Risk factors” and our other filings with the SEC.

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 Annual Report on Form 10-K. Statements made herein are as of the date of the filing of this Annual Report on Form 10-K 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 Annual Report on Form 10-K, 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 through our novel tumor-directed oncolytic immunotherapies. Our

TABLE OF CONTENTS

proprietary tumor-directed oncolytic immunotherapy product candidates are designed and intended to maximally activate the immune system against cancer.

Oncolytic immunotherapy is an emerging drug class, which we intend to establish as the second cornerstone of immune-based cancer treatments, alongside checkpoint blockade. Oncolytic immunotherapy 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. 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 other approaches of inducing anti-tumor immunity, including 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.

Financial

Since our inception, we have devoted substantially all of our resources to developing our proprietary RPx platform, building our intellectual property portfolio, conducting research and development of our product candidates, business planning, raising capital and providing selling, general and administrative support for our operations. To date, we have incurred significant operating losses and we have financed our operations primarily with proceeds from the sale of equity securities and to a lesser extent the proceeds from the issuance of debt securities. 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. We do not have any products approved for sale and have not generated any revenue from product sales.

Since our initial public offering, or IPO, on July 20, 2018, we have raised an aggregate of approximately $849.1 million in net proceeds to fund our operations, of which $101.2 million was from our IPO, $706.0 million was from four separate follow-on offerings, or the Public Offerings, that we closed in November 2019, June 2020, October 2020 and December 2022, respectively, and $41.9 million was from at-the-market offerings. We sold 7,407,936 shares of common stock in our IPO, an aggregate of 20,430,480 shares of our common stock and pre-funded warrants to purchase 9,484,238 shares of common stock in the Public Offerings, and 2,313,997 shares of common stock through our at-the-market facilities.

Our net losses were $174.3 million and $118.0 million for the years ended March 31, 2023 and 2022, respectively. As of March 31, 2023, we had an accumulated deficit of $485.5 million. These losses have resulted primarily from costs incurred in connection with research and development activities and selling, general and administrative costs associated with our operations. We expect to continue to incur significant expenses and increasing operating losses for the next several years and our ability to generate product revenue sufficient to achieve profitability will depend on the successful development and commercialization of one or more of our product candidates.

We anticipate that our expenses and capital requirements will increase substantially in connection with our ongoing activities, particularly as we advance the clinical trials, development and pre-commercial activities related to our RPx platform product candidates, and if and as we:

•conduct our current and future clinical trials with RP1, RP2 and RP3;

•further preclinical development of our platform;

•operate our 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 manufacturing facility is fully validated, continued limited manufacturing by third parties for clinical development;

•maintain, expand and protect our intellectual property portfolio;

•hire and retain additional clinical, quality control, scientific and selling, general and administration personnel;

•acquire or in-license other drugs, technologies or intellectual property rights; and

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

TABLE OF CONTENTS

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 March 31, 2023, we had cash and cash equivalents and short-term investments of $583.4 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 through at least 12 months from the issuance of the consolidated financial statements included in this Annual Report on Form 10-K.

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

The COVID-19 pandemic

We are continuing to monitor the global outbreak and spread of COVID-19 and, throughout the pandemic, have implemented measures designed to comply with applicable federal, state and local guidelines, as well as care for our employee's health and well-being. We will continue to examine our protocols as the pandemic and health guidance evolves. The COVID-19 pandemic continues to affect the United States and global economies and has affected and may continue to affect our operations and those of third parties on which we rely, including by causing disruptions in our raw material and anti-PD-1 supply, the manufacturing of our product candidates and our commercialization processes. In addition, timing of patient enrollment and treatment in certain of our ongoing clinical studies has been impacted by the pandemic. However, the extent of these delays is currently unknown and has and will likely continue to vary by clinical study. In addition, we may incur unforeseen costs as a result of disruptions in raw material supplies, clinical product supplies, and preclinical studies or clinical trial delays. The full extent to which the COVID-19 pandemic will directly or indirectly impact our business, results of operations and financial condition will depend on future developments that are highly uncertain and cannot be accurately predicted, including new information that may emerge concerning COVID-19, the actions taken in an effort to contain it or to potentially treat or continue to vaccinate against COVID-19 and the economic impact on local, regional, national and international markets. We continue to actively monitor this situation and the possible effects on our financial condition, liquidity, operations, suppliers, supplies, industry and workforce.

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 collaborations or license agreements.

Operating expenses

Research and development expenses

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

•expenses incurred under agreements with third parties, including clinical research organizations, or CROs, that conduct research, preclinical activities and clinical trials on our behalf as well as contract manufacturing organizations, or CMOs, that manufacture our raw materials and/or 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 engaged in research and development functions, 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;

TABLE OF CONTENTS

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

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

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 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. We do not allocate personnel costs, costs associated with our discovery efforts, laboratory supplies 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. Non-employee costs associated with our manufacturing facility including depreciation, amortization and facility costs are appropriately allocated to development programs based on the percentage of time spent per program.

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 continue enrollment and initiate additional clinical trials 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, as well as future clinical trials 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;

•the rate of enrollment in clinical trials;

•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 operating our 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 maintain, expand and 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.

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

TABLE OF CONTENTS

enrollment or other reasons, we could 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.

Selling, general and administrative expenses

Selling, general and administrative expenses consist primarily of salaries and other related costs, including stock-based compensation, for personnel in our executive, finance, corporate, commercial, and business development and administrative functions. Selling, general and administrative expenses also include professional fees for legal, patent, accounting, auditing, tax and consulting services, pre-commercial planning, marketing and strategic planning, business development, 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 selling, general and administrative expenses will continue to increase in the future as we increase our selling, general and administrative headcount to support our continued research and development and pre-launch activities to prepare for potential commercialization of our product candidates. We also expect to continue to incur increased expenses, including 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.

Investment income

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

Interest expense on finance lease liability

Interest expense on finance lease liability consists of amortization of finance charges under our financing lease.

Interest expense on debt obligations

Interest expense on debt obligations consists of the amortization of debt discount and cash paid for interest under the Hercules Loan Agreement.

Other income (expense), net

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

Income taxes

During the year ended March 31, 2023, the Company recorded an income tax provision of $0.3 million related to U.S. current taxes primarily due to the transfer pricing arrangement between the U.S. and the U.K., as well as unfavorable adjustments related to stock compensation, resulting in U.S. taxable income reduced by certain prior year available net operating losses.

During the year ended March 31, 2022, the Company recorded no income tax benefit for the net operating losses incurred due to the uncertainty of the realization of such losses.

Results of operations

Comparison of the years ended March 31, 2023 and 2022

The following table summarizes our results of operations for the years ended March 31, 2023 and 2022:

TABLE OF CONTENTS

Year Ended March 31, Change

(Amounts in thousands)

Operating expenses:

Other income (expense):

Interest expense on finance lease liability (2,197) (2,223) 26 (1) %

Interest expense on debt obligations (1,963) — (1,963) (100) %

Research and development expenses

Research and development expenses for the year ended March 31, 2023 were $126.5 million, compared to $79.5 million for the year ended March 31, 2022. The following table summarizes our research and development expenses for the years ended March 31, 2023 and 2022:

Year Ended March 31, Change

Direct research and development expenses by program:

Unallocated research and development expenses:

The change in our direct research and development expenses between our product candidates is primarily associated with technology transfer from RP2 to RP3, process development, qualification and comparability of our in-house manufactured materials compared to our third-party manufactured materials in readiness for utilizing our product candidates made at our in-house manufacturing facility in our clinical development programs and preparation for potential commercial manufacture, if approved.

The increase in RP1 is primarily the result of an increase in our number of clinical trial sites and patient enrollment as compared to the prior year, and a reduction of $5.7 million of costs sharing in the CERPASS trial from Regeneron during the current period as discussed in Note 12 to the consolidated financial statements appearing elsewhere in this Annual Report. During the second half of the year, manufacturing shifted focus to validation batches for RP1, which is the driver of the change in program costs year over year.

The increase of $21.8 million in our unallocated expenses was due primarily to a $16.1 million increase in personnel-related costs, including a $14.6 million increase in payroll and fringe benefits and a stock-based compensation increase of $1.5 million. The increase in personnel-related costs largely reflected the hiring of additional personnel in our research and development functions as we expand the development plan in multiple indications. Personnel related costs for the years ended March 31, 2023 and 2022 included stock-based compensation expense of $10.1 million and $8.6 million, respectively.

TABLE OF CONTENTS

Additionally, the increase in other expenses is primarily driven by an increase of $2.6 million in consulting costs across our platform and a $0.9 million of increased costs related to our manufacturing facility and related lease costs.

Selling, general and administrative expenses

Selling, general and administrative expenses were $50.6 million for the year ended March 31, 2023, compared to $38.8 million for the year ended March 31, 2022. The increase of $11.8 million is primarily the result of an increase of $5.9 million in personnel related costs, including a stock-based compensation increase of $2.4 million, an increase of $3.5 million in payroll and fringe benefits. The increase in personnel related costs was driven by the continued hiring of additional personnel in our selling, general and administrative functions, focusing on additional pre-launch planning and initial build of the Company's commercial infrastructure, which accounts for approximately $1.2 million of the increase compared to prior year. Additionally, there is an increase of $4.9 million in other variable costs which is driven by external spend increases for sales and marketing programs, advertising and market research.

Total other income (expense), net

Other income for the year ended March 31, 2023 was $3.1 million compared to $0.3 million for the year ended March 31, 2022. The net change of $2.8 million is primarily attributable to an increase of $9.6 million in investment income in the current year as compared to the prior year. This increase was somewhat offset by a $4.6 million increase in expense due to the changes in foreign exchange rates of the Great British Pound to United States Dollar, as well as an increase in expense of $2.0 million as a result of interest expense on debt obligations.

Income tax provision

Income tax provision for the year ended March 31, 2023 was $0.3 million compared to $0.0 million for the year ended March 31, 2022. The income tax provision for the current year is attributable to U.S. current taxes primarily due to the transfer pricing arrangement between the U.S. and the U.K., as well as unfavorable adjustments related to stock compensation, resulting in U.S. taxable income reduced by certain prior year available net operating losses.

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 of equity securities and, to a lesser extent, proceeds from borrowing under a secured loan facility. Through March 31, 2023, we had received net proceeds of $935.9 million through the sale of equity securities, as well as net $27.8 million from our incurrence of debt under the Hercules Loan Agreement. As of March 31, 2023, we had cash and cash equivalents and short-term investments of $583.4 million.

Cash flows

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

Year Ended March 31,

(Amounts in thousands)

Net cash used in operating activities $ (128,050) $ (82,180)

Net cash (used in) investing activities (142,502) (1,806)

Net cash provided by financing activities 311,303 6,598

Effect of exchange rate changes on cash and cash equivalents (109) 818

Net increase (decrease) in cash and cash equivalents $ 40,642 $ (76,570)

Operating activities

TABLE OF CONTENTS

During the year ended March 31, 2023, net cash used in operating activities was $128.1 million, primarily resulting from our net loss of $174.3 million, partially offset by non-cash charges of $31.1 million, consisting primarily of stock-based compensation expense of $28.1 million, and an increase in cash of $15.1 million related to changes in our operating assets and liabilities. Changes in our operating assets and liabilities for the year ended March 31, 2023 consisted primarily of a $11.4 million increase in accrued expenses and other current liabilities, a net $2.4 million change in operating and financing right-of-use assets and lease liabilities, and a $2.0 million increase in accounts payable.

During the year ended March 31, 2022, net cash used in operating activities was $82.2 million, primarily resulting from our net loss of $118.0 million, partially offset by non-cash charges of $28.6 million, consisting of stock-based compensation expense of $24.3 million and $4.4 million of expense related to depreciation and amortization and net amortization of premiums and discounts on short-term investments, and an increase in cash of $7.2 million related to changes in our operating assets and liabilities. Changes in our operating assets and liabilities for the year ended March 31, 2022 consisted primarily of a $4.7 million increase in accrued expenses and other current liabilities, a net $2.5 million change in operating and financing right-of-use assets and lease liabilities, a $1.1 million increase in accounts payable and a $0.8 million increase in prepaid expenses and other current assets, as well as a $0.2 million increase in research and development incentives receivable from the United Kingdom government due to the timing and amount of qualifying expenditures.

Investing activities

During the year ended March 31, 2023, net cash used in investing activities was $142.5 million, consisting of $583.4 million in purchases of available for sale securities and $2.3 million in purchases of property, plant and equipment, offset by $443.2 million in proceeds from sales and maturities of short-term investments.

During the year ended March 31, 2022, net cash used in investing activities was $1.8 million, consisting of $255.7 million in purchases of available for sale securities and $2.3 million in purchases of property, plant and equipment, offset by $256.3 million in proceeds from sales and maturities of short-term investments.

Financing Activities

During the year ended March 31, 2023, net cash provided by financing activities was $311.3 million, consisting primarily of $149.9 million in proceeds from the issuance of common stock, $92.8 million from the issuance of pre-funded warrants to purchase common stock, $37.4 million from the issuance of common stock through sales under our at-the-market facilities, $28.2 million in proceeds from the incurrence of debt under the Hercules Loan Agreement, as well as approximately $3.4 million in proceeds from the exercise of stock options.

During the year ended March 31, 2022, net cash provided by financing activities was $6.6 million, consisting primarily of $6.9 million in proceeds from the exercise of stock options.

Funding requirements

Our plan of operation is to continue implementing our business strategy, continue research and development of our RPx platform, 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 and if and as we:

•conduct our current and future clinical trials with RP1, RP2 and RP3;

•further preclinical development of our RPx platform;

•operate, qualify and maintain our in-house manufacturing facility and qualify and maintain our product candidates made therein for use in our clinical trials;

•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 fully validated, continued limited manufacturing by third parties for clinical development;

•maintain, expand and protect our intellectual property portfolio;

•acquire or in-license other drugs, technologies or third-party intellectual property; and

TABLE OF CONTENTS

As of March 31, 2023, we had cash and cash equivalents and short-term investments of $583.4 million. Based on our current operating plan, we believe that our existing cash, cash equivalents and short-term investments as of March 31, 2023, will enable us to fund operations into the second half of calendar year 2025.

Because of the numerous risks and uncertainties associated with the development of RP1 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, our shareholders’ interest may be diluted, and the terms of these securities may include liquidation or other preferences and anti-dilution protections that could adversely affect the rights of our 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.

Contractual obligations and commitments

We have entered into arrangements that contractually obligate us to make payments that will affect our liquidity and cash flows in future periods. Our contractual obligations include those related to our operating and financing leases, long-term debt, as well as costs associated with contracts entered into in the normal course of business with CROs, CMOs and other third parties for clinical trials and preclinical research studies and testing.

Lease Commitments

As of March 31, 2023, the aggregate amount of future lease payments is approximately $56.6 million, with $3.8 million due within one year. For additional information on our leases and timing of future payments, see Note 13 Commitments and contingencies, of the "notes to Consolidated Financial Statements" contained in Part II, Item 8 of this Annual Report on Form 10-K.

Loan Agreement

Our commitments due for our term loan under our arrangement with Hercules include principal payments of $30.0 million as of March 31, 2023. Borrowings under the term loan agreement are repayable in monthly interest-only payments through September 2026, and the agreement has a maturity date of October 2027. Our remaining commitments, based on our current draws, are due through October 2027, and include principal and interest payments of $43.8 million, and an additional fee upon

TABLE OF CONTENTS

maturity of the loan of $1.5 million. See Note 7, Long term debt, of the "notes to Consolidated Financial Statements" contained in Part II, Item 8 of this Annual Report on Form 10-K for further discussion of the Hercules term loan.

Other Obligations

Manufacturing and research commitments include agreements that are enforceable and legally binding on us and that specify all significant terms, including fixed or minimum quantities to be purchased; fixed, minimum or variable price provisions; and the approximate timing of the transaction. As of March 31, 2023, the aggregate amount of non-cancelable purchase obligations related to such manufacturing commitments are approximately $1.0 million and all of this balance is due within one year.

Collaborations

BMS

In February 2018, we entered into a Clinical Trial Collaboration and Supply Agreement with Bristol-Myers Squibb Company, or BMS. Pursuant to the agreement, BMS is providing to us, at no cost, nivolumab, its anti-PD-1 therapy, for use in combination with RP1 in our ongoing Phase 1/2 clinical trial. Under the agreement, we will sponsor, fund and conduct the clinical trial in accordance with an agreed-upon protocol. BMS granted us a non-exclusive, non-transferrable, royalty-free license (with a right to sublicense) under its intellectual property to use nivolumab in the clinical trial and has agreed to supply nivolumab, at no cost to us, for use in the clinical trial. Both parties will own the study data produced in the clinical trial, other than study data related solely to nivolumab, which will belong solely to BMS, or study data related solely to RP1, which will belong solely to us. In January 2020, this agreement was expanded to cover an additional cohort of 125 patients with anti-PD-1 failed melanoma.

Unless earlier terminated, the agreement will remain in effect until (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 us to use nivolumab in the clinical trial will terminate. The agreement contains representations, warranties, undertakings and indemnities customary for a transaction of this nature.

In April 2019, we 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, at no cost to us, nivolumab for use in our Phase 1 clinical trial of RP2 in combination with nivolumab.

Regeneron

In May 2018, we entered into a Master Clinical Trial Collaboration and Supply Agreement with Regeneron. Pursuant to the agreement we agreed to undertake one or more clinical trials with Regeneron for the administration of our product candidates in combination with cemiplimab, an anti-PD-1 therapy developed by Regeneron, across multiple solid tumor types, the first of which is our ongoing Phase 2 clinical trial testing RP1 in combination with cemiplimab versus cemiplimab alone in patients with CSCC. Each clinical trial will be conducted pursuant to an agreed study plan which, among other things, will identify the name of the sponsor and which party will manage the particular study, and include the protocol, the budget and a schedule of clinical obligations. The first study plan related to the Phase 2 clinical trial in CSCC has been agreed.

Pursuant to the terms of the agreement, each party granted the other party a non-exclusive license of their respective intellectual property and agreed to contribute the necessary resources needed to fulfill their respective obligations, in each case, under the terms of agreed study plans. Development costs of an agreed study plan will be split equally. In July 2022, Regeneron informed the Company that the costs of the study have reached the initial budget for the initial study plan of June 2018 and that Regeneron's reimbursement of CERPASS study costs to the Company have completed in the period ending June 30, 2022 in relation to the initial study budget. As a result of this notice from, and the ongoing communications with, Regeneron, we have not recorded any cost-sharing reimbursements from Regeneron in prepaid expenses and other current assets in the consolidated balance sheet or as an offset to research and development expense within the consolidated statement of operations since Regeneron informed us that Regeneron’s reimbursement of CERPASS study costs have completed. The Company does not expect any further reimbursements from Regeneron related to the initial study plan of June 2018. The agreement contains representations, warranties, undertakings and indemnities customary for a transaction of this nature. The agreement also contains certain time-based covenants that restrict us from entering into a third-party arrangement with respect to the use of our product candidates in combination with an anti-PD-1 therapy and that restrict Regeneron from entering into a third-party arrangement with respect to the use of cemiplimab in combination with an HSV-1 virus, in each case, for the treatment of a

TABLE OF CONTENTS

tumor type that is the subject of a clinical trial to which the covenants apply. Unless otherwise mutually agreed in a future study plan, these covenants are only applicable to our ongoing Phase 2 clinical trial in CSCC.

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 and 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 (ii) in the event of a material breach.

Roche

In December 2022, we entered into a Master Clinical Trial Collaboration and Supply Agreement with Roche in relation to our RP2 and RP3 programs in colorectal cancer, or CRC, and hepatocellular carcinoma, or HCC. Under the agreement, the companies will collaborate in 30 patient cohort signal finding studies in third-line, or 3L, CRC and in first- and second-line, or 1L and 2L, respectively, HCC. Under the terms of the agreement, the companies will share costs and Roche will supply its currently approved drugs, atezolizumab and bevacizumab for 2L HCC and 3L CRC combined with RP3. Roche will also supply atezolizumab and bevacizumab for 1L HCC combined with RP3, and for 3L CRC combined with RP2. We have retained the responsibility of operating the clinical trials as well as retaining all the rights to the development and commercialization of our product candidates. The agreement may be terminated by either party upon sixty (60) days prior written notice to the other party.

Critical accounting policies and estimates

Our management’s discussion and analysis of financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with generally accepted accounting principles in the United States. The preparation of our consolidated financial statements and related disclosures requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, costs and expenses and the disclosure of contingent assets and liabilities in our consolidated financial statements. We base our estimates on historical experience, known trends and events and various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates under different assumptions or conditions.

While our significant accounting policies are described in greater detail in Note 2 to our consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K, we believe that the following accounting policies are those most critical to the judgments and estimates used in the preparation of our consolidated financial statements.

Accrued research and development expenses

As part of the process of preparing our consolidated financial statements, we are required to estimate our accrued research and development expenses. This process involves reviewing open contracts and purchase orders, communicating with our personnel to identify services that have been performed on our behalf and estimating the level of service performed and the associated cost incurred for the service when we have not yet been invoiced or otherwise notified of actual costs. The majority of our service providers invoice us in arrears for services performed, on a pre-determined schedule or when contractual milestones are met; however, some require advanced payments. We make estimates of our accrued expenses as of each balance sheet date in the consolidated financial statements based on facts and circumstances known to us at that time. Examples of estimated accrued research and development expenses include fees paid to:

•CROs in connection with performing research activities and conducting preclinical studies and clinical trials on our behalf;

•CMOs in connection with the production of preclinical and clinical trial materials;

•investigative sites or other service providers in connection with clinical trials;

•vendors in connection with preclinical and clinical development activities; and

•vendors related to product manufacturing and development and distribution of preclinical and clinical supplies.

We base our expenses related to preclinical studies and clinical trials on our estimates of the services received and efforts expended pursuant to quotes and contracts with multiple CMOs and CROs that supply, conduct and manage preclinical studies and clinical trials on our behalf. The financial terms of these agreements are subject to negotiation, vary from contract to contract and may result in uneven payment flows. There may be instances in which payments made to our vendors will exceed the level of services provided and result in a prepayment of the expense. Payments under some of these contracts depend onfactors such as the successful enrollment of patients and the completion of clinical trial milestones. In accruing service fees, we

TABLE OF CONTENTS

estimate the time period over which services will be performed and the level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from the estimate, we adjust the accrual or the amount of prepaid expenses accordingly. Although we do not expect our estimates to be materially different from amounts actually incurred, our understanding of the status and timing of services performed relative to the actual status and timing of services performed and/or timing of receiving invoices for actual services performed may vary and may result in reporting amounts that are too high or too low in any particular period. To date, there have not been any material adjustments to our prior estimates of accrued research and development expenses.

Stock-based compensation

We issue stock-based awards to employees, directors, consultants and non-employees in the form of stock options and restricted stock units. We measure such stock-based awards in accordance with ASC 718, Compensation — Stock Compensation, which requires all stock-based awards to be recognized in the consolidated statements of operations and comprehensive loss based on their fair value on the date of the grant and the related compensation expense for those awards is recognized over the requisite service period, which is generally the vesting period of the respective award. We have, to date, only issued stock-based awards with service-based vesting conditions and record the expense for these awards using the straight-line method. The fair value of each stock option grant is estimated on the date of grant using the Black-Scholes option-pricing model, which requires inputs based on certain subjective assumptions, including the expected stock price volatility, the expected term of the option, the risk-free interest rate for a period that approximates the expected term of the option, and our expected dividend yield. See Note 10 of the "Notes to Consolidated Financial Statements" contained in Part II, Item 8 of this Annual Report on Form 10-K for more information. Forfeitures are accounted for as they occur. The fair value of each stock-based award is estimated on the date of grant based on the fair value of our common stock on that same date.

We classify stock-based compensation expense in our consolidated statements of operations in the same manner in which the award recipient’s payroll costs are classified or in which the award recipient’s service payments are classified.

Recently issued accounting pronouncements

Refer to Note 2, summary of significant accounting policies of the “Notes to Consolidated Financial Statements” contained in Part II, Item 8 of this Annual Report on Form 10-K for a description of recent accounting pronouncements that are applicable to our business and may potentially have an impact on our financial position and results of operations.

Emerging growth company status

As an “emerging growth company,” the Jumpstart Our Business Startups Act of 2012 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 7A. Quantitative and qualitative disclosures about market risks

Interest rate sensitivity

As of March 31, 2023, we had cash and cash equivalents and short-term investments of $583.4 million, which consisted of cash equivalents, U.S. Treasury securities and U.S. government agency securities. Interestincome 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.

Foreign currency exchange risk

Our headquarters are located in the United States, where the majority of our selling, 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 years ended March 31, 2023 and 2022, we recognized a net foreign currency transaction losses of $5.7 million and $1.1 million, respectively. These losses are primarily related to unrealized and realized foreign 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 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.

TABLE OF CONTENTS

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.

Item 8. Financial statements and supplementary data

See the consolidated financial statements filed as part of this Annual Report on Form 10-K as listed under Item 15 below.

Item 9. Changes in and disagreements with accountants on accounting and financial disclosures

None.

Item 9A. 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. Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the effectiveness of our disclosure controls and procedures as of March 31, 2023. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective at a reasonable assurance level as of March 31, 2023.

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.

Management’s report on internal control over financial reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act). Internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles and includes those policies and procedures that:

(i)pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets;

(ii)provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and

(iii)provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on our financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Management of the Company has assessed the effectiveness of the Company’s internal control over financial reporting as of March 31, 2023. In making its assessment of internal control over financial reporting, management used the criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the

TABLE OF CONTENTS

Treadway Commission (COSO). Based on this evaluation, management concluded that our internal control over financial reporting was effective as of March 31, 2023.

This annual report does not include an audit report of the Company’s registered public accounting firm regarding internal control over financial reporting. Management’s report was not subject to audit by the Company’s registered public accounting firm pursuant to rules of the Securities and Exchange Commission that permit the Company to provide only management’s report in this Annual Report on Form 10-K.

Changes in internal control over financial reporting

There have been no changes in our internal control over financial reporting during the fourth quarter of the fiscal year ended March 31, 2023 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Item 9B. Other Information

None.

Item 9C. Disclosure Regarding Jurisdictions That Prevent Inspections

Not Applicable.

TABLE OF CONTENTS

PART III

Item 10. Directors, executive officers and corporate governance

The text of our Code of Business Conduct and Ethics, which applies to our directors and employees (including our principal executive officer, principal financial officer, and principal accounting officer or controller, and persons performing similar functions), is posted in the “Corporate Governance” section of our website, www.replimune.com. A copy of the Code of Business Conduct and Ethics can be obtained free of charge on our website. We intend to disclose on our website any amendments to, or waivers from, our Code of Business Conduct and Ethics that are required to be disclosed pursuant to the rules of the Securities and Exchange Commission and Nasdaq. The information contained on our website is not considered part of, or incorporated by reference into, this Annual Report on Form 10-K or any other filing that we make with the Securities and Exchange Commission.

The remaining information required under this item is incorporated herein by reference to our definitive proxy statement pursuant to Regulation 14A, which proxy statement will be filed with the Securities and Exchange Commission not later than 120 days after the close of our fiscal year ended March 31, 2023.

Item 11. Executive compensation

The information required under this item is incorporated herein by reference to our definitive proxy statement pursuant to Regulation 14A, which proxy statement will be filed with the Securities and Exchange commission not later than 120 days after the close of our fiscal year ended March 31, 2023.

Item 12. Security ownership of certain beneficial owners and management and related stockholder matters

Securities authorized for issuance under equity compensation plans

The following table provides information as of March 31, 2023, regarding our common stock that may be issued under (1) the 2017 Equity Compensation Plan, or the 2017 Plan; (2) the 2018 Omnibus Incentive Compensation Plan, or the 2018 Plan; or (3) the Employee Stock Purchase Plan, or the ESPP.

Plan Category:

Equity compensation plans approved by stockholders

_________________

(1)Includes 1,230,030 shares of common stock subject to outstanding restricted stock units.

The remaining information required under this item is incorporated herein by reference to our definitive proxy statement pursuant to Regulation 14A, which proxy statement will be filed with the Securities and Exchange commission not later than 120 days after the close of our fiscal year ended March 31, 2023.

Item 13. Certain relationships and related transactions, and director independence

Item 14. Principal accountant fees and services

TABLE OF CONTENTS

PART IV

Item 15. Exhibits and financial statement schedules

(a)1. Consolidated financial statements.

For a list of the consolidated financial statements included herein, see Index on page F-1 of this report.

2.Financial statement schedules.

All required information is included in the financial statements or notes thereto.

3.List of exhibits.

The documents listed in the exhibit index immediately preceding the signature page of this Annual Report on Form 10-K are incorporated by reference or are filed or furnished with this Annual Report on Form 10-K, in each case as indicated therein.

Item 16. 10-K summary

None.

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

Financial Statements

For the Years Ended March 31, 2023 and 2022

Page

Report of independent registered public accounting firm (PCAOB ID 238) F-2

Consolidated balance sheets F-3

Consolidated statements of operations F-4

Consolidated statements of comprehensive loss F-6

Consolidated statements of stockholders’ equity F-7

Consolidated statements of cash flows F-8

Notes to consolidated financial statements F-9

F - 1

TABLE OF CONTENTS

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of Replimune Group, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Replimune Group, Inc. and its subsidiaries (the “Company”) as of March 31, 2023 and 2022, and the related consolidated statements of operations, of comprehensive loss, of stockholders’ equity and of cash flows for the years then ended, including the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of March 31, 2023 and 2022, and the results of its operations and its cash flows for the years then ended in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits of these consolidated financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

May 18, 2023

We have served as the Company’s auditor since 2018.

F - 2

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

CONSOLIDATED BALANCE SHEETS

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

Assets

Current assets:

Research and development incentives receivable 2,939 3,055

Prepaid expenses and other current assets 6,278 5,267

Property, plant and equipment, net 7,479 7,933

Right-to-use asset – operating leases 5,208 5,552

Right-to-use asset – financing leases 39,665 42,094

Liabilities and Stockholders’ Equity

Current liabilities:

Accrued expenses and other current liabilities 24,704 13,392

Operating lease liabilities, current 1,118 1,070

Financing lease liabilities, current 2,639 2,562

Operating lease liabilities, non-current 4,389 4,801

Financing lease liabilities, non-current 23,965 24,406

Long term debt, net of discount 28,648 —

Other liabilities, non-current 472 —

Commitments and contingencies (Note 13)

Stockholders’ equity:

Accumulated other comprehensive income (loss) 5,729 (973)

Total liabilities and stockholders’ equity $ 646,591 $ 461,192

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

F - 3

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

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

Year Ended March 31,

Operating expenses:

Other income (expense):

Research and development incentives 2,914 3,170

Interest expense on finance lease liability (2,197) (2,223)

Interest expense on debt obligations (1,963) —

Income tax provision 288 —

Net loss per common share, basic and diluted $ (2.99) $ (2.26)

F - 4

TABLE OF CONTENTS

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

F - 5

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(Amounts in thousands)

Year Ended March 31,

Other comprehensive loss:

Foreign currency translation gain 5,483 748

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

F - 6

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Amounts in thousands, except share amounts)

Shares Amount

Foreign currency translation adjustment — — — — 748 748

Unrealized loss on short-term investments — — — — (1,327) (1,327)

Vesting of RSUs 3,993 — — — — —

Stock-based compensation expense — — 24,254 — — 24,254

Issuance of prefunded warrants to purchase common stock — — 92,778 — — 92,778

Foreign currency translation adjustment — — — — 5,483 5,483

Unrealized gain on short-term investments — — — — 1,219 1,219

Vesting of RSUs 203,681 — — — — —

Stock-based compensation expense — — 28,131 — — 28,131

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

F - 7

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in thousands)

Year Ended March 31,

Cash flows from operating activities:

Adjustments to reconcile net loss to net cash used in operating activities:

Depreciation and amortization 2,447 2,147

Noncash interest expense 494 —

Unrealized foreign currency transaction losses 5,676 —

Changes in operating assets and liabilities:

Research and development incentives receivable (61) (247)

Prepaid expenses and other current assets (1,059) (815)

Operating lease, right-of-use-asset 225 99

Finance lease, right-of-use-asset 2,428 2,428

Accrued expenses and other current liabilities 11,376 4,725

Operating lease liabilities (238) (73)

Other non-current liabilities 472 —

Net cash used in operating activities (128,050) (82,180)

Cash flows from investing activities:

Purchases of property, plant and equipment (2,270) (2,336)

Proceeds from sales and maturities of short-term investments 443,180 256,250

Net cash used in investing activities (142,502) (1,806)

Cash flows from financing activities:

Proceeds from long-term debt, net of debt issuance costs 28,154 —

Principal payment of finance lease obligation (365) (264)

Proceeds from exercise of stock options 3,444 6,862

Net cash provided by financing activities 311,303 6,598

Cash, cash equivalents and restricted cash at end of period $ 148,226 $ 107,584

Supplemental disclosure of cash flow information:

Cash paid during the period for interest 1,066 $ —

Cash paid for income taxes, net — 55

Supplemental disclosure of non-cash investing and financing activities:

Purchases of property and equipment included in accounts payable $ 103 $ 415

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

F - 8

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

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

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 Group, Inc., whose predecessor was founded in 2015, is the parent company of its wholly owned, direct and indirect subsidiaries: Replimune Limited (“Replimune UK”); Replimune, Inc. (“Replimune US”); Replimune Securities Corporation; and Replimune (Ireland) Limited.

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.

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 $174.3 million and $118.0 million for the years ended March 31, 2023 and 2022, respectively. In addition, as of March 31, 2023, the Company had an accumulated deficit of $485.5 million. The Company expects to continue to generate operating losses for the foreseeable future. As of 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 consolidated financial statements.

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 direct and indirect wholly owned subsidiaries, Replimune UK, Replimune US, Replimune Securities Corporation and Replimune (Ireland) Limited after elimination of all intercompany accounts and transactions.

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 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.

Foreign currency and currency translation

The functional currency for the Company’s wholly owned foreign subsidiary, Replimune UK, is the British pound. Assets and liabilities of Replimune UK are translated into United States dollars at the exchange rate in effect on the balance sheet date. Revenues and expenses are translated at the average exchange rate in effect during the period. Unrealized translation gains and losses are recorded as a cumulative translation adjustment, which is included in the consolidated statements of stockholders’ equity as a component of accumulated other comprehensive loss. Adjustments that arise from exchange rate changes on transactions denominated in a currency other than the local currency are included in other income (expense), net in the consolidated statements of operations as incurred.

F - 9

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

2. Summary of significant accounting policies (Continued)

Concentrations of credit risk and of significant suppliers

Financial instruments that potentially expose the Company to concentrations of credit risk consist primarily of cash and cash equivalents as well as short-term investments. The Company deposits its cash in financial institutions in amounts that may exceed federally insured limits. We limit our exposure to credit risk by placing investments with high credit quality financial institutions, diversifying our investment portfolio and placing investments with maturities that maintain safety and liquidity. To date, the Company has not experienced any losses on such accounts.

The Company relies, and expects to continue to rely, on a small number of vendors to manufacture and supply raw materials and supply services for its development programs. These programs could be adversely affected by a significant interruption in these services or the availability of raw materials.

Cash and cash equivalents

The Company considers all highly liquid investments with original maturities of three months or less at date of purchase to be cash equivalents. Cash equivalents consisted of money market funds as of March 31, 2023 and 2022, respectively. As of March 31, 2023 and 2022, the amount of cash equivalents included in cash and cash equivalents totaled $121.5 million and $75.1 million, respectively.

Restricted cash

The Company holds restricted cash in segregated bank accounts in connection with a letter of credit. As of March 31, 2023 and 2022, restricted cash consisted of $1.6 million, held for the benefit of the landlords in connection with our leases. These amounts have been classified as non-current assets on the Company’s consolidated balance sheets.

Short-term investments

The Company’s short-term debt security investments are classified as available-for-sale and are carried at fair value, with the unrealized gains and non-credit related losses reported as a component of accumulated other comprehensive loss and included in stockholders’ equity. Realized gains and losses and declines in value determined to be other than temporary are based on the specific identification method and are included as a component of other income (expense), net in the consolidated statements of operations.

For available-for-sale securities in an unrealized loss position, we first assess whether we intend to sell, or if it is more likely than not that we will be required to sell, the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through a charge to interest income. For available-for-sale securities that do not meet the aforementioned criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Company considers such factors as, among other things, the severity of the impairment, any changes in interest rates, how long the market value of the investment has been less than its original cost, the Company’s ability and intent to retain the short-term debt security investment for a period of time sufficient to allow for any anticipated recovery in fair value and market conditions in general. The credit-related portion of unrealized losses, and any subsequent improvements, are recorded in interest income through an allowance account. Any impairment that has not been recorded through an allowance for credit losses is included in other comprehensive loss on the statements of operations and comprehensive loss.

No credit-related losses or impairments have been recognized on the Company's investments in available-for-sale securities during the years ended March 31, 2023 or 2022.

The Company’s short-term investments as of March 31, 2023 and 2022 had maturities of less than two years. The Company has classified its investments with maturities beyond one year as short term, based on their highly liquid nature and because they represent the investment of cash that is available for current operations.

Property, plant and equipment

Property, plant and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization expense is recognized using the straight-line method over the estimated useful lives of the respective assets as follows:

F - 10

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

2. Summary of significant accounting policies (Continued)

Estimated Useful life

Office equipment 5 years

Computer equipment and software 3 years

Plant, manufacturing and laboratory equipment 5 years

Leasehold improvements Lesser of lease term or 10 years

Costs for capital assets not yet placed into service are capitalized as construction-in-progress and depreciated in accordance with the above guidelines once placed into service. Upon retirement or sale, the cost of assets disposed of and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is included in loss from operations. Expenditures for repairs and maintenance are charged to expense as incurred.

Impairment of long-lived assets

Long-lived assets consist of property, plant and equipment. Long-lived assets to be held and used are tested for recoverability whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable. Factors that the Company considers in deciding when to perform an impairment review include significant underperformance of the business in relation to expectations, significant negative industry or economic trends and significant changes or planned changes in the use of the assets. If an impairment review is performed to evaluate a long-lived asset group for recoverability, the Company compares forecasts of undiscounted cash flows expected to result from the use and eventual disposition of the long-lived asset group to its carrying value. An impairment loss would be recognized when estimated undiscounted future cash flows expected to result from the use of an asset group are less than its carrying amount. The impairment loss would be based on the excess of the carrying value of the impaired asset group over its fair value, determined based on discounted cash flows. To date, the Company has not recorded any impairment losses on long-lived assets.

Fair value measurements

Certain assets and liabilities of the Company are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three levels of the fair value hierarchy, of which the first two are considered observable and the last is considered unobservable:

•Level 1 — Quoted prices in active markets for identical assets or liabilities.

•Level 2 — Observable inputs (other than Level 1 quoted prices), such as quoted prices in active markets for similar assets or liabilities, quoted prices in markets that are not active for identical or similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data.

•Level 3 — Unobservable inputs that are supported by little or no market activity that are significant to determining the fair value of the assets or liabilities, including pricing models, discounted cash flow methodologies and similar techniques.

The Company’s short-term investments and cash equivalents are carried at fair value, determined according to the fair value hierarchy described above (see Note 3). The carrying values of research and development incentives receivable, prepaid expenses and other current assets, accounts payable and accrued expenses and other current liabilities approximate their fair values due to the short-term nature of these assets and liabilities. Furthermore, the carrying value of the Company’s long-term debt approximates its fair value as of March 31, 2023 due to its variable interest rate, which approximates a market interest rate.

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 consolidated financial statements

F - 11

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

2. Summary of significant accounting policies (Continued)

present debt issuance costs related to a recognized debt liability as a direct reduction from the carrying amount of that debt liability.

Segment information

The Company manages its operations as a single operating segment for the purposes of assessing performance and making operating decisions. The Company’s current focus is on developing oncolytic immunotherapies for the treatment of cancer.

Research and development costs

Research and development costs are expensed as incurred. Research and development expenses consist of costs incurred in performing research and development activities, including salaries, stock-based compensation and benefits, facilities costs and laboratory supplies, depreciation and external costs of outside vendors engaged to conduct preclinical development, clinical development activities and clinical trials as well as to manufacture clinical trial materials. Non-refundable prepayments for goods or services that will be used or rendered for future research and development activities are deferred and capitalized. Such amounts are recognized as an expense as the goods are delivered or the related services are performed, or until it is no longer expected that the goods will be delivered or the services rendered. Upfront payments for materials and supplies acquired for particular research and development activities that have no alternative future use in other research and development projects or otherwise, and therefore have no separate economic value, are expensed as research and development costs at the time the costs are incurred.

Research contract costs and accruals

The Company has entered into various research and development-related contracts with companies both inside and outside of the United States. These agreements are generally cancellable, and related costs are recorded as research and development expenses as incurred. The Company records accruals for estimated ongoing research costs. When evaluating the adequacy of the accrued liabilities, the Company analyzes progress of the studies or clinical trials, including the phase or completion of events, invoices received and contracted costs. Significant judgments and estimates are made in determining the accrued balances at the end of any reporting period. Actual results could differ from the Company’s estimates. The Company’s historical accrual estimates have not been materially different from the actual costs.

Patent costs

All patent-related costs incurred in connection with filing and prosecuting patent applications are expensed as incurred due to the uncertainty about the recovery of the expenditure. Amounts incurred are classified as selling, general and administrative expenses.

Stock-based compensation

The Company accounts for share-based payment awards granted to employees, consultants, and non-employees and directors using the fair value of the Company’s common stock on the grant date and compensation expense is recognized for those awards over the requisite service period, which is generally the vesting period of the respective award. The grant date fair value is utilized for time-vested restricted stock units (“RSUs”) is based on the closing price of the Company's common stock on the date of grant. The fair value of each stock option grant is estimated on the date of grant using the Black-Scholes option-pricing model, which requires inputs based on certain subjective assumptions, including the expected stock price volatility, the expected term of the option, the risk-free interest rate for a period that approximates the expected term of the option, and the Company’s expected dividend yield (see Note 10). Forfeitures are accounted for as they occur. To date, the Company has issued stock-based awards with only service-based vesting conditions and records the expense for these awards using the straight-line method.

The Company classifies stock-based compensation expense in its consolidated statements of operations in the same manner in which the award recipient’s payroll costs are classified or in which the award recipient’s service payments are classified.

Research and development incentives and receivable

F - 12

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

2. Summary of significant accounting policies (Continued)

The Company, through its subsidiary in the United Kingdom, receives reimbursements of certain research and development expenditures as part of a United Kingdom government’s research and development tax reliefs program. Under the program, a percentage of qualifying research and development expenses incurred by the Company’s subsidiary in the United Kingdom are reimbursed up to 14.5%.

Management has assessed the Company’s research and development activities and expenditures to determine which activities and expenditures are likely to be eligible under the research and development incentive program described above. At each period end, management estimates the reimbursement available to the Company based on available information at the time.

The Company recognizes income from the research and development incentives when the relevant expenditure has been incurred, the associated conditions have been satisfied and there is reasonable assurance that the reimbursement will be received. The Company records these research and development incentives as other income. The research and development incentives receivable represents an amount due in connection with the above program. The Company recorded other income from research and development incentives of $2.9 million and $3.2 million during the years ended March 31, 2023 and 2022, respectively, in the consolidated statements of operations and a research and development incentives receivable of $2.9 million and $3.1 million as of March 31, 2023 and 2022, respectively, on the consolidated balance sheets.

Comprehensive loss

Comprehensive loss includes net loss as well as other changes in stockholders’ equity that result from transactions and economic events other than those with stockholders. For the year ended March 31, 2023, comprehensive loss included $5.5 million of foreign currency translation gains and $1.2 million of unrealized gains on short-term investments, net of tax. For the year ended March 31, 2022, comprehensive loss included $0.7 million of foreign currency translation gains and $1.3 million of unrealized losses on short-term investments, net of tax.

Income taxes

The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the consolidated financial statements or in the Company’s tax returns. Deferred tax assets and liabilities are determined on the basis of the differences between the consolidated financial statements and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Changes in deferred tax assets and liabilities are recorded in the provision for income taxes. The Company assesses the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent it believes, based upon the weight of available evidence, that it is more likely than not that all or a portion of the deferred tax assets will not be realized, a valuation allowance is established through a charge to income tax provision. Potential for recovery of deferred tax assets is evaluated by estimating the future taxable profits expected and considering prudent and feasible tax planning strategies.

The Company accounts for uncertainty in income taxes recognized in the consolidated financial statements by applying a two-step process to determine the amount of tax benefit to be recognized. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination by the taxing authorities. If the tax position is deemed more-likely-than-not to be sustained, the tax position is then assessed to determine the amount of benefit to recognize in the consolidated financial statements. The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The provision for income taxes includes the effects of any resulting tax reserves, or unrecognized tax benefits, that are considered appropriate as well as the related net interest and penalties.

Net income (loss) per share

Basic net income (loss) per common share is computed by dividing the net income (loss) by the weighted average number of shares of common stock outstanding for the period. Diluted net income (loss) per common share is computed by dividing the diluted net income (loss) by the weighted average number of shares of common stock outstanding for the period, including potential dilutive common shares assuming the dilutive effect of common stock equivalents.

In periods in which the Company reports a net loss, diluted net loss per share is the same as basic net loss per share, since dilutive common shares are not assumed to have been issued if their effect is anti-dilutive.

F - 13

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

2. Summary of significant accounting policies (Continued)

Recently adopted accounting pronouncements

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. The Company adopted ASU 2016-13 as of April 1, 2022. The adoption of ASU 2016-13 did not have a material impact on the Company's 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 March 31, 2023 Using:

Level 1 Level 2 Level 3 Total

Cash equivalents:

Short-term investments:

Fair Value Measurements as of March 31, 2022 Using:

Level 1 Level 2 Level 3 Total

Cash equivalents:

Short-term investments:

The underlying securities held in the money market funds held by the Company are all government backed securities. During the years ended March 31, 2023 and 2022, there were no transfers between levels.

Valuation of cash equivalents and short-term investments

Money market funds, U.S. Treasury bonds and U.S. Government Agency bonds 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. Cash equivalents consisted of money market funds at March 31, 2023 and March 31, 2022.

4.Short-term investments

As of March 31, 2023 and 2022, the Company's available-for-sale investments by type, consisted of the following:

F - 14

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)

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

4. Short-term investments (Continued)

As of March 31, 2023 and 2022, available-for-sale securities consisted of investments that mature within one year, with the exception of certain U.S. Government agency bonds and U.S. Treasury bonds which have maturities between one and two years and an aggregate fair value of $15.1 million and $7.6 million, respectively.

5.Property, plant and equipment, net

Property, plant and equipment, net consisted of the following:

Plant and laboratory equipment 9,186 7,720

Less: Accumulated depreciation and amortization (7,242) (4,795)

Depreciation and amortization expense was $2.4 million and $2.1 million for the years ended March 31, 2023 and 2022, respectively, and recorded within research and development and selling, general and administrative expenses in the consolidated statement of operations.

6.Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following:

Accrued research and development costs $ 11,261 $ 5,882

Accrued compensation and benefits costs 9,909 5,569

Accrued professional fees 540 621

7.Long-term debt

Hercules Loan Agreement

On October 6, 2022, the Company entered into a Loan and Security Agreement (the “Loan Agreement”), with Hercules Capital, Inc., as administrative agent, collateral agent and as a lender (“Hercules”). Pursuant to the Loan Agreement, the Company can borrow term loans in an aggregate maximum principal amount of up to $200.0 million under multiple tranches (the “Term Loan Facility”). Under the Loan Agreement, the Company borrowed an initial amount of $30.0 million on the

F - 15

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)

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

7. Long-term debt (Continued)

Closing Date, and at the Company's sole option, can draw down an additional $30.0 million on or prior to September 30, 2023, as well as additional term loan advances in an aggregate principal amount of up to $115.0 million during the term of the Term Loan Facility subject to achievement of specified performance milestones, and two additional term loan advances up to an aggregate principal amount of $25.0 million subject to certain terms and conditions, on or prior to the end of the interest-only period. The Company intends to use the proceeds of the Term Loan Facility for working capital and general corporate purposes.

The Term Loan Facility will mature on October 1, 2027 (the “Maturity Date”). The outstanding principal balance of the Term Loan Facility bears interest payable in cash at a floating rate per annum equal to the greater of (i) 7.25% and (ii) the sum of the Prime Rate (which is capped at 7.25%) and 1.75%. Accrued interest is payable monthly following the funding of each term loan advance. In addition, the principal balance of the Term Loan Facility will bear “payment-in-kind” interest at the rate of 1.50% (“PIK Interest”), which PIK Interest will be added to the outstanding principal balance of the Term Loan Facility on each interest payment date.

Borrowings under the Loan Agreement are repayable in monthly interest-only payments through September 2026. After the interest-only payment period, borrowings under the Loan Agreement are repayable in equal monthly payments of principal and accrued interest until October 2027. At the Company's option, the Company may prepay all or a portion of the outstanding borrowings, subject to a prepayment fee of 3.0% of the principal amount if prepayment occurs during the 12 months following the Closing Date, 2.0% after 12 months following the Closing Date but prior to 36 months following the Closing Date, and 1.0% thereafter.

The Loan Agreement contains customary facility fees, events of default and representations, warranties and affirmative and negative covenants, including a financial covenant requiring us to maintain certain levels of cash in accounts subject to a control agreement in favor of the Agent (the “Unrestricted Cash”) at all times commencing on January 1, 2024. In addition, the Loan Agreement also contains a financial covenant that beginning on the later of (i) July 1, 2024 and (ii) the date on which the aggregate outstanding principal amount of the Term Loan Facility is equal to or greater than $100.0 million, the Company is required to satisfy one of the following requirements: (1) achieve a minimum amount of trailing three-month net product revenue tested on a monthly basis, (2) maintain a market capitalization in excess of $1.2 billion and Unrestricted Cash in an amount no less than 50% of the outstanding amount under the Term Loan Facility, or (3) maintain Unrestricted Cash in an amount no less than 85% of the outstanding amount under the Term Loan Facility.

The Company paid a $0.5 million facility charge and incurred debt issuance costs of $1.5 million upon closing of the Loan Agreement. The Loan Agreement also provides for a final payment, payable upon maturity or the repayment of the obligations in full or in part (on a pro rata basis), equal to 4.95% of the aggregate principal amount of Term Loans advanced to the Borrower and repaid on such date, which is being accrued on the Company's consolidated balance sheet. As of March 31, 2023, the amount accrued for the final payment is $0.2 million.

Unamortized debt issuance costs are recorded as a reduction of the carrying amount on the term loan and amortized as interest expense using the effective-interest method. In addition, unamortized deferred financing costs of $0.2 million were recorded in other assets as of March 31, 2023 related to the Company's right to borrow additional amounts from Hercules in the future and amortized to interest expense over the relevant draw period on a straight-line basis. Interest expense for the twelve months ended March 31, 2023 was $2.0 million.

The summary of obligations under the term loan as of March 31, 2023 consisted of the following (in thousands):

Principal loan balance $ 30,222

Facility charge and diligence fee (315)

Unamortized issuance costs (1,410)

Accumulated end of term fee 151

Long term debt, net $ 28,648

The annual principal payments due under the Loan Agreement as of March 31, 2023 were as follows:

F - 16

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)

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

7. Long-term debt (Continued)

The table of future payments of long-term debt excludes the end of term charge of $1.5 million, which is due upon the maturity of the loan.

8.Stockholders’ Equity

Common stock

As of March 31, 2023 and 2022, 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.

The Company had reserved for common stock for the exercise of outstanding stock options and the vesting of restricted share units, 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 10) and the exercise of the outstanding warrants to purchase shares of common stock as follows:

Stock options and restricted stock units, future issuance 2,209,597 1,933,300

Employee stock purchase plan, available for future grants 2,076,603 1,550,375

Undesignated preferred stock

As of March 31, 2023, 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 March 31, 2023.

ATM program

On August 11, 2020, the Company and SVB Leerink (the "Agent") entered into a sales agreement, which was subsequently amended on October 21, 2020 (as amended, the “2020 Sales Agreement”), pursuant to which the Company could sell, from time to time, at its option, up to an aggregate of $62.5 million 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.

During the twelve months ended March 31, 2023, the Company settled transactions that occurred pursuant to the 2020 Sales Agreement, whereby the Company issued and sold an aggregate of 1,686,438 shares of its common stock, resulting in gross proceeds of $32.0 million, before deducting fees of $1.0 million. The Company did not issue or sell any shares under the 2020 Sales Agreement during the year ended March 31, 2022.

F - 17

TABLE OF CONTENTS

REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)

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

8. Stockholders’ Equity (Continued)

On June 23, 2022, the 2020 Sales Agreement was terminated by the execution by the Company and the Agent of a new sales agreement (the “2022 Sales Agreement”). Under the 2022 Sales Agreement, the Company may sell, from time to time, at its option, up to an aggregate $100.0 million 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 2022 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 if authorized by the Company, in negotiated transactions or block trades, and (ii) pursuant to a registration statement on Form S-3 filed by the Company with the Securities and Exchange Commission on June 23, 2022 for an offering of up to $400.0 million 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 2022 Sales Agreement, the Agent will use 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 up to 3.0% of the gross proceeds from the sale of the Shares. The Company has also agreed to provide the Agent with customary indemnification rights.

During the twelve months ended March 31, 2023, pursuant to the 2022 Sales Agreement, the Company issued and sold an aggregate of 340,000 shares of its common stock, resulting in gross proceeds of $6.7 million, before deducting fees of $0.3 million. The Company cannot provide any assurances that it will issue any additional Shares pursuant to the 2022 Sales Agreement.

Equity offerings

In November 2019, the Company completed a public offering of (a) 4,516,561 shares of the Company’s common stock at a public offering price of $13.61 per share, inclusive of the underwriters partially exercised 30-day option to purchase an additional 838,530 shares of the Company’s common stock, and (b) pre-funded warrants to purchase 2,200,000 shares of the Company’s common stock at a public offering price of $13.6099 per warrant. The Company received aggregate net proceeds of approximately $85.6 million after deducting underwriting discounts, commissions and other offering expenses payable by the Company of approximately $5.8 million.

In June 2020, the Company completed a public offering of (a) 3,478,261 shares of the Company’s common stock, inclusive of the June 2020 Underwriters fully exercised 30-day option to purchase 652,173 shares of the Company's common stock at a public offering price of $23.00 per share, and (b) pre-funded warrants to purchase 1,521,738 shares of the Company’s common stock at a public offering price of $22.9999 per warrant. The Company received aggregate net proceeds of approximately $107.8 million after deducting underwriting discounts, commissions and other offering expenses payable by the Company of approximately $7.2 million.

In October 2020, the Company completed a public offering of (a) 5,625,000 shares of the Company’s common stock, inclusive of the underwriters 30-day option to purchase up to an additional 937,500 shares of the Company’s common stock, at a public offering price of $40.00 per share and (b) pre-funded warrants to purchase 1,562,500 shares of the Company’s common stock at a public offering price of $39.9999 per warrant. The Company received aggregate net proceeds of approximately $270.0 million after deducting underwriting discounts, commissions and other offering expenses payable by the Company of approximately $17.5 million.

In December 2022, the Company completed a public offering of (a) 6,810,658 shares of the Company’s common stock, inclusive of the underwriters 30-day option to purchase up to an additional 1,436,172 shares of the Company’s common stock, at a public offering price of $23.50 per share and (b) pre-funded warrants to purchase 4,200,000 shares of the Company’s common stock at a public offering price of $23.4999 per warrant. The Company received aggregate net proceeds of approximately $242.6 million after deducting underwriting discounts, commissions and other offering expenses payable by the Company of approximately $16.1 million.

9. Pre-funded Warrants

The pre-funded warrants described above are exercisable at any time after the date of issuance. Unless otherwise modified by a holder of a pre-funded warrant, no holder may exercise a pre-funded warrant if such holder, together with its affiliates,

F - 18

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 a pre-funded warrant may increase or decrease this percentage up to 19.99% by providing at least 61 days’ prior notice to the Company.

The 9,484,238 shares of the Company's common stock underlying the above described pre-funded warrants, are not included in the number of issued and outstanding shares of the Company’s common stock outstanding as reported on the consolidated balance sheet, though they are included in the Company's annual pool increase calculation as well as the weighted average outstanding common stock in the calculation of basic and diluted net loss per share, as noted below in Note 11. As of March 31, 2023, no pre-funded warrants had been exercised.

In April 2023, a holder of the Company's pre-funded warrants exercised 1,016,528 of its pre-funded warrants and the Company issued 1,016,528 shares of common stock.

10.Stock-based compensation

Stock-based compensation expense

The following table summarizes the classification of stock-based compensation expense in the consolidated statements of operations for the years ended March 31, 2023 and 2022 as follows:

Twelve Months EndedMarch 31,

The following table summarizes stock-based compensation expense by award type for the years ended March 31, 2023 and 2022 as follows:

Twelve Months EndedMarch 31,

REPL US Equity

REPL · 10-K · period ended 2023-03-31

Item 7. Management’s discussion and analysis of financial condition and results of operations

Item 7A. Quantitative and qualitative disclosures about market risks

Item 8. Financial statements and supplementary data

Item 9. Changes in and disagreements with accountants on accounting and financial disclosures

Item 9A. Controls and procedures

Item 9B. Other Information

Item 9C. Disclosure Regarding Jurisdictions That Prevent Inspections

Item 10. Directors, executive officers and corporate governance

Item 11. Executive compensation

Item 12. Security ownership of certain beneficial owners and management and related stockholder matters

Item 13. Certain relationships and related transactions, and director independence

Item 14. Principal accountant fees and services

Item 15. Exhibits and financial statement schedules

Item 16. 10-K summary

REPL US Equity☆

REPL · 10-K · period ended 2023-03-31

Item 7. Management’s discussion and analysis of financial condition and results of operations

Item 7A. Quantitative and qualitative disclosures about market risks

Item 8. Financial statements and supplementary data

Item 9. Changes in and disagreements with accountants on accounting and financial disclosures

Item 9A. Controls and procedures

Item 9B. Other Information

Item 9C. Disclosure Regarding Jurisdictions That Prevent Inspections

Item 10. Directors, executive officers and corporate governance

Item 11. Executive compensation

Item 12. Security ownership of certain beneficial owners and management and related stockholder matters

Item 13. Certain relationships and related transactions, and director independence

Item 14. Principal accountant fees and services

Item 15. Exhibits and financial statement schedules

Item 16. 10-K summary

REPL US Equity