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

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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 oncolytic immunotherapies. Our proprietary 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 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. We believe that the bundling of multiple approaches for the treatment of cancer into single therapies will increase clinical efficacy and simplify the development path of our product candidates, while also improving patient outcomes.

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, proceeds from borrowing under secured loan facilities. 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 $1,132.9 million in net proceeds to fund our operations, of which $101.2 million was from our IPO, $862.0 million was from five separate follow-on offerings, or the Public Offerings, that we closed in November 2019, June 2020, October 2020, December 2022, and November 2024, respectively, $96.7 million was from our private placement transaction in June 2024, and $73.0 million was from at-the-market offerings.

Our net losses were $313.9 million and $247.3 million for the years ended March 31, 2026 and 2025, respectively. As of March 31, 2026, we had an accumulated deficit of $1,262.5 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 at least the next several years.

We anticipate that our expenses and capital requirements will fluctuate from period to period depending upon the Company's development programs and priorities. We expect to continue to incur costs in connection with our ongoing development activities, including further advancement of any preclinical activities and clinical trials of our product candidates across our platform, and if and as we:

•continue to conduct our current and future clinical trials;

•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;

•maintain, expand and protect our intellectual property portfolio;

•hire, train 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

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•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.

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, 2026, we had cash and cash equivalents and short-term investments of $268.9 million. Based on our current operating plan, we believe that our existing cash and cash equivalents and short-term investments will enable us to fund our operating expenses and capital expenditure requirements into the first calendar quarter of 2027, which includes scale up for the potential commercialization of RP1 in skin cancers and for working capital and general corporate purposes and excludes any potential revenue. We have based these estimates on assumptions that may prove to be wrong, and we could utilize our available capital resources sooner than we expect.

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

Components of our results of operations

Revenue

To date, we have not generated any revenue from product sales as we do not have any approved products and we can not be certain we will generate any revenue from the sale of products in the 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

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

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 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;

•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.

Direct research and development costs, consisting of costs, such as fees paid to consultants, contractors, CMOs and CROs in connection with our preclinical and clinical development activities, are tracked by study. Additional costs, consisting

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primarily of our initial manufacturing costs, including materials, supplies, depreciation and facility costs, are allocated at a program level, based upon manufacturing runs, as the drug product can be utilized across multiple studies for any particular program. Additional costs to label, package and distribute the drug product is then directly allocated to the specific studies when incurred, as that drug product has then been assigned to a particular study. In the event our additional future or ongoing study costs become meaningful to investors, we will present those costs by study.

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.

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 in, and the initiation of, additional clinical trials, as well as the continued discovery and development of additional product candidates. However, if we determine that the continued development of RP1 is not viable, our outlook and plans may be uncertain and the impact on our research and development expenses will also be uncertain. At this time our ability to fund and successfully develop, and commercialize, if approved, 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 extent to which we are able to reach a mutually agreeable path forward with the FDA with respect to the scope, design, implementation and timing of an approval for RP1 (vusolimogene oderparepvec) in combination with nivolumab for the treatment of adult patients with advanced melanoma who have previously received an anti-PD-1 containing regimen 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 and the timing of such approval;

•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 and the views and implementation of such regulation and guidance from the leadership of the applicable regulatory agency.

A change in the outcome of any of these variables with respect to the development of a product candidate could mean a significant change in the costs and timing associated with the development of that product candidate. For example, if the FDA or another regulatory authority were to require us to conduct clinical trials beyond those that we anticipate will be required for the completion of clinical development of a product candidate, or if we experience significant trial delays due to patient enrollment or other reasons, we 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.

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

If the FDA provides an accelerated approval of our BLA for RP1 plus nivolumab for the treatment of advanced melanoma, 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 operations 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. If we determine that the continued development of RP1 is not viable, we expect that our selling, general and administrative expenses will decrease but to what extent we are uncertain.

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 16.2% 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 finance 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 (expense) income, net

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

Income taxes

During the years ended March 31, 2026 and 2025, the Company recorded an income tax benefit of $0.6 million and a provision of $0.5 million, respectively.

Results of operations

Comparison of the years ended March 31, 2026 and 2025

The following table summarizes our results of operations for the years ended March 31, 2026 and 2025:

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Year Ended March 31, Change

(Amounts in thousands)

Operating expenses:

Other income (expense):

Interest expense on finance lease liability (2,063) (2,118) 55 (3) %

Research and development expenses

Research and development expenses for the year ended March 31, 2026 were $221.2 million, compared to $189.4 million for the year ended March 31, 2025. The following table summarizes our research and development expenses for the years ended March 31, 2026 and 2025:

Year Ended March 31, Change

Direct research and development expenses by program:

RP1 program costs by study:

Unallocated research and development expenses:

The total increase of $31.7 million in research and development expenses was driven by an increase of $24.5 million in our direct research and development costs, as well as an increase of $7.2 million in unallocated expenses. The increase of approximately $24.5 million in our direct research and development costs was driven by an increase of $13.9 million in spending on RP2 study costs during the year, primarily related to the REVEAL study, as the Company continued to ramp up enrollment and expanded this trial outside of the United States. In addition, RP1 costs increased by $12.9 million as a result of costs related to the IGNYTE-3 confirmatory study as well as an increase of $7.7 million in other RP1 study costs, specifically operating and lab supplies, and facility costs. These increases were partially offset by decreases in the IGNYTE and CERPASS

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studies as a result of the completion of enrollment in the IGNYTE advanced melanoma cohort and declining enrollment and the wind down of the CERPASS study.

The increase in unallocated expenses includes an increase of $9.8 million in personnel-related costs, which is primarily related to an increase of $11.6 million in payroll and fringe benefits which largely reflected the increase in personnel in our research and development functions year over year as we expanded the development plan in multiple indications. The decrease in other costs is driven by a year over year decrease in consulting costs.

Selling, general and administrative expenses

Selling, general and administrative expenses were $98.7 million for the year ended March 31, 2026, compared to $72.2 million for the year ended March 31, 2025. The increase of $26.6 million in sales, general and administrative costs is driven primarily by an increase of $20.3 million in personnel related costs, comprised of an increase of $21.4 million in payroll and fringe benefits slightly offset by a stock-based compensation decrease of $1.1 million. The increase in personnel related costs was driven by the continued hiring of additional personnel within our selling, general and administrative functions, specifically focusing on planning for a potential commercial launch. Personnel related costs for the year ended March 31, 2026 and 2025 included stock-based compensation expense of $15.5 million and $16.6 million, respectively.

Total other income (expense), net

Other income for the year ended March 31, 2026 was $5.4 million compared to $14.8 million for the year ended March 31, 2025. The net change of $9.4 million is primarily attributable to a decrease of $7.5 million in investment income in the current year as compared to the prior year as a result of the cash and investment balance being lower throughout the year as compared to the prior year due to normal cash burn, as well as an increase in interest expense on debt obligations in the amount of $1.0 million as a result of a higher debt balance during the current year vs. the prior year.

Income tax provision

The income tax benefit for the year ended March 31, 2026 was $0.6 million compared to an income tax provision of $0.5 million for the year ended March 31, 2025.

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. Until we are able to generate sufficient revenue from RP1 and our other product candidates that we develop, if at all, we anticipate that we will continue to incur significant operating losses and negative cash flows from our operations.

Based on its currentoperating plan, the Company expects to continue to generate operating losses for the foreseeable future and that its existing cash, cash equivalents and short-term investments will be sufficient to fund its operating expenses and capital expenditure requirements only into the first calendar quarter of 2027, which is less than one year from the date these consolidated financial statements are issued. The Company does not have any committed source of additional funding and will be required to obtain additional financing to fund its operations beyond that date. These conditions raise substantial doubt about the Company's ability to continue as a going concern.

The Company is collaborating with the FDA regarding a path forward for RP1 and, if the BLA is approved, the Company will determine the best source of capital, which may be raising additional capital through public or private equity offerings (including under our at-the-market facilities), although there can be no guarantee that the Company will be able to raise such capital on acceptable terms, or at all. If the BLA is not approved, the Company will likely need to (i) execute a considerable restructuring and workforce reduction to reduce our cash burn, (ii) reconsider our product development efforts and strategies and (iii) pursue collaborations, strategic alliances, licensing arrangements, business combination, merger or acquisition, or other strategic business development activities to continue operations. In either scenario, our plans are subject to risks and uncertainties, including factors outside our control. Accordingly, we have not been able to conclude that these plans are probable of being effectively implemented and, as such, they do not alleviate the substantial doubt about our ability to continue as a going concern.

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, 2026, we had received net proceeds of $1,132.9

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million through the sale of shares of common stock and pre-funded warrants exercisable for common stock in public offerings, a private placement transaction, and at-the-market offerings, as well as our incurrence of debt under the Hercules Loan Agreement. As of March 31, 2026, we had cash and cash equivalents and short-term investments of $268.9 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 $ (280,344) $ (192,250)

Net cash provided by (used in) investing activities 310,843 (23,796)

Net cash provided by financing activities 66,294 252,396

Effect of exchange rate changes on cash and cash equivalents 1,112 315

Net increase in cash and cash equivalents $ 97,905 $ 36,665

Operating activities

During the year ended March 31, 2026, net cash used in operating activities was $280.3 million, primarily resulting from our net loss of $313.9 million, which was partially offset by non-cash charges of $37.4 million, consisting primarily of stock-based compensation expense of $32.3 million, depreciation and amortization expense of $3.3 million and a net $3.2 million change in operating and finance right-of-use assets and lease liabilities, somewhat offset by $2.5 million related to the net amortization of premiums and discounts on short-term investments and a decrease in cash of $3.8 million related to changes in our operating assets and liabilities. Changes in our operating assets and liabilities for the year ended March 31, 2026 consisted primarily of a $4.9 million decrease in accounts payable and a $2.2 million increase in accrued expenses and other current liabilities.

During the year ended March 31, 2025, net cash used in operating activities was $192.3 million, primarily resulting from our net loss of $247.3 million, which was partially offset by non-cash charges of $31.0 million, consisting primarily of stock-based compensation expense of $35.0 million and depreciation expense of $3.5 million, somewhat offset by $8.9 million related to the net amortization of premiums and discounts on short-term investments. Additionally, there was an increase in cash of $24.1 million related to changes in our operating assets and liabilities. Changes in our operating assets and liabilities for the year ended March 31, 2025 consisted primarily of a $11.7 million increase in accrued expenses and other current liabilities, a $9.9 million increase in accounts payable, and a net $2.4 million change in operating and finance right-of-use assets and lease liabilities.

Investing activities

During the year ended March 31, 2026, net cash provided by investing activities was $310.8 million, consisting of $393.0 million in proceeds from sales and maturities of short-term investments, somewhat offset by $77.9 million in purchases of available for sale securities and $4.2 million in purchases of property, plant and equipment.

During the year ended March 31, 2025, net cash used in investing activities was $23.8 million, consisting of $403.6 million in purchases of available for sale securities and $6.7 million in purchases of property, plant and equipment, partially offset by $386.5 million in proceeds from sales and maturities of short-term investments.

Financing Activities

During the year ended March 31, 2026, net cash provided by financing activities was $66.3 million, consisting primarily of $35.0 million in proceeds from the incurrence of debt under the loan agreement with Hercules, as well as $31.1 million in proceeds from the issuance of common stock through sales under our at-the-market facility.

During the year ended March 31, 2025, net cash provided by financing activities was $252.4 million, consisting primarily of $252.7 million in proceeds from the Company's private placement transaction in June 2024 as well as the Company's November 2024 public offering.

Funding requirements

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Our plan of operation is to continue implementing our business strategy, continue research and development of RP1 and our other product candidates and continue to expand our research pipeline and our internal research and development capabilities. We expect our expenses to increase substantially in connection with our ongoing activities, particularly as we advance the preclinical activities and clinical trials of our product candidates, and potential commercialization of RP1 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

As of March 31, 2026, we had cash and cash equivalents and short-term investments of $268.9 million and $83.3 million in long term debt. Based on our current operating plan, we believe that our existing cash, cash equivalents and short-term investments as of March 31, 2026, will enable us to fund operations into the first calendar quarter of 2027 which includes scale up for the potential commercialization of RP1 in skin cancers and for working capital and general corporate purposes and excludes any potential revenue. We have based these estimates on assumptions that may prove to be wrong, and we could utilize our available capital resources sooner than we expect.

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 and potential commercialization 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

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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 finance 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, 2026, the aggregate amount of future lease payments is approximately $45.1 million, with $4.0 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 $80.0 million as of March 31, 2026. Borrowings under the term loan agreement are repayable in monthly interest-only payments through September 2027, and the agreement has a maturity date of October 2027. A balloon payment, inclusive of accrued interest and principal, are due on the maturity date of October 1, 2027. Our remaining commitments, based on our current draws, are due on October 2027, and include principal and interest payments of $84.2 million, and an additional fee upon maturity of the loan of $4.0 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, 2026, the aggregate amount of non-cancelable purchase obligations related to such manufacturing commitments are approximately $0.8 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.

Roche

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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 intended to 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. Following our re-prioritization of our product development portfolio in December 2023, we have agreed with Roche to terminate the CRC collaboration and pursue the 2L cohort in HCC with RP2 only. Roche has continued to supply its currently approved drugs, atezolizumab and bevacizumab for the 2L cohort in HCC but is not sharing costs following our re-prioritization. Under the terms of the initial agreement we 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 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 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.

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Stock-based compensation

We issue stock-based awards to employees, directors, consultants and non-employees in the form of stock options, restricted stock units, or RSUs, and performance-based restricted stock units, or PSUs. 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, issued stock-based awards with service-based and performance-based vesting conditions. Expense for stock-based awards with service-based vesting conditions is recorded using the straight-line method and for PSUs with performance-based vesting conditions, the expense is recorded using the graded vesting 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 RSU and PSU 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.

Item 7A. Quantitative and qualitative disclosures about market risks

Interest rate sensitivity

As of March 31, 2026, we had cash and cash equivalents and short-term investments of $268.9 million, which consisted of cash equivalents, U.S. Treasury securities and U.S. government agency securities. Our primary exposure to market risk relates to fluctuations in interest rates, which are affected by changes in the general level of U.S. interest rates. Given the short-term nature of our cash, cash equivalents and marketable securities, we do not expect that a sudden change in market interest rates would have a material impact on our financial condition and/or results of operations.

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, 2026 and 2025, we recorded net foreign currency transaction gains of $0.3 million and $0.2 million, respectively. These gains 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 gains and losses were recorded as a component of other income (expense), net in our consolidated statements of operations. We believe that a 10% change in the exchange rate between the British pound and the euro would not have a material impact on our financial position or results of operations.

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

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

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Evaluation of disclosure controls and procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has performed an evaluation of the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act) as of the end of the period covered by this report, as required by Rule 13a-15(b) under the Exchange Act. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of March 31, 2026, our disclosure controls and procedures were effective at the reasonable assurance level.

Our management concluded that the consolidated financial statements included in this Annual Report on Form 10-K, present fairly, in all material respects, our financial position, results of operations, and cash flows for the periods presented in accordance with accounting principles generally accepted in the United States of America, or U.S. GAAP. Our Chief Executive Officer and Chief Financial Officer have certified that, based on each such officer’s knowledge, the financial statements, as well as the other financial information included in this Annual Report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in this Annual Report.

Management’s report on internal control over financial reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting. 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, 2026. 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 Treadway Commission, or COSO. Based on this evaluation, management concluded that our internal control over financial reporting was effective as of March 31, 2026.

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.

Remediation of material weakness

As of March 31, 2026, we have remediated the previously reported material weaknesses concerning the design and maintenance of information technology, or IT, general controls for information systems that are relevant to the preparation of our financial statements. Specifically, we did not design and maintain effective: (i) program change management controls to ensure that information technology program and data changes are identified, tested, authorized and implemented appropriately; (ii) user access controls to ensure appropriate segregation of duties and to adequately restrict user and privileged access to appropriate personnel; (iii) computer operations controls to ensure that processing and transfer of data, and data backups and recovery are monitored; and (iv) program development controls to ensure that new software development is tested, authorized and implemented appropriately.

In response to the identified material weaknesses, we took a number of actions to improve our internal control over financial reporting during the year ended March 31, 2026, including the following:

•Engaging an external advisor to assist with documenting and testing the design and operating effectiveness of internal controls over financial reporting and assist with the remediation efforts, as necessary;

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•Redesigned, enhanced, and implemented certain general IT controls, including controls over the provisioning and monitoring of user access rights for certain systems;

•Designed and implemented controls to formalize roles and review responsibilities over segregation of duties across key financial systems; and

•Designed and implemented program change management computer operations and program development controls.

Management has since completed implementation of all of the remedial measures, as well as testing the design and operating effectiveness of the applicable remediated controls in the last two quarters of fiscal year 2026.

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, 2026 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Item 9B. Other Information

Rule 10b5-1 Plan Trading Arrangements

During the three months ended March 31, 2026, none of our directors or officers adopted, modified, or terminated any effective “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” in each case as defined in Item 408 of Regulation S-K.

Item 9C. Disclosure Regarding Foreign Jurisdictions That Prevent Inspections

Not Applicable.

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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.

In addition, we have adopted an insider trading policy and procedures governing the purchase, sale, and/or other dispositions of our securities (the “Insider Trading Policy”) that applies to all directors, officers, and employees of the Company and its subsidiaries. With regard to the Company's trading in its own securities, it is the Company's policy to comply with the federal securities laws and the applicable exchange listing requirements. We believe that the Insider Trading Policy is reasonably designed to promote compliance with insider trading laws, rules and regulations with respect to the purchase, sale and/or other dispositions of the Company's securities, as well as any listing standards, rules and regulations applicable to us. A copy of the Insider Trading Policy is filed with the SEC and incorporated by reference herein as Exhibit 19.1 to our Annual Report on Form 10-K for the year ended March 31, 2025.

Information about our executive officers, directors, and all other remaining matters required to be disclosed in Item 10 “Directors, executive officers and corporate governance” appears under the “Executive Officers,” “Proposal No. 1 – Election of Directors,” “Board of Directors,” “Corporate Governance,” “Anti-Hedging and Pledging Policy,” and “Audit Committee Report” sections of our proxy statement for our 2026 annual meeting of stockholders, or our 2026 Proxy Statement, and is hereby incorporated by reference. We will file our 2026 Proxy Statement with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the close of our fiscal year ended March 31, 2026.

Item 11. Executive compensation

Information about compensation of our named executive officers appears under the “Corporate Governance,” “Director Compensation,” “Executive Compensation,” and the “Pay versus Performance” sections of our 2026 Proxy Statement and is hereby incorporated by reference. Information about compensation of the Board appears under the "Director Compensation" section of our 2026 Proxy Statement and is hereby incorporated by reference. We will file our 2026 Proxy Statement with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the close of our fiscal year ended March 31, 2026.

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, 2026, 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

Equity compensation plans not approved by stockholders — — —

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_________________

(1)Includes 4,907,131 shares of common stock subject to outstanding restricted and performance stock units.

Information about security ownership of certain beneficial owners and management appears under the "Security Ownership of Certain Owners and Management" section of our 2026 Proxy Statement and is hereby incorporated by reference. We will file our 2026 Proxy Statement with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the close of our fiscal year ended March 31, 2026.

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

Information about certain relationships and related transactions, and director independence appears under “Certain Relationships and Related Party Transactions” and “Corporate Governance” sections of our 2026 Proxy Statement and are hereby incorporated by reference. We will file our 2026 Proxy Statement with the Securities and Exchange Commission

pursuant to Regulation 14A not later than 120 days after the close of our fiscal year ended March 31, 2026.

Item 14. Principal accountant fees and services

Information about the fees and services of our principal accountant, PricewaterhouseCoopers LLP, appears under the “Proposal No. 2 — Ratification of Selection of Independent Registered Public Accounting Firm” section of our 2026 Proxy Statement and is hereby incorporated by reference. We will file our 2026 Proxy Statement with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the close of our fiscal year ended March 31, 2026.

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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.

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REPLIMUNE GROUP, INC.

Index to Consolidated Financial Statements

For the Years Ended March 31, 2026 and 2025

Page

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

Consolidated balance sheets F-4

Consolidated statements of operations F-5

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

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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, 2026 and 2025, 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, 2026 and 2025, 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.

Substantial Doubt about the Company’s Ability to Continue as a Going Concern

The accompanying consolidated financial statements have been prepared assuming that the Company will continue as a going concern. As discussed in Note 1 to the consolidated financial statements, the Company has incurred recurring losses since its inception which raises substantial doubt about its ability to continue as a going concern. Management's plans in regard to this matter are also described in Note 1. The consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty.

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.

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Accrued Research and Development Costs

As described in Notes 2 and 6 to the consolidated financial statements, the Company has entered into various research and development-related contracts with companies both inside and outside of the United States. When billing terms under these contracts do not coincide with the timing of when the work is performed, management is required to make estimates of outstanding obligations to those third parties as of the end of the reporting period. The Company records accruals for estimated ongoing research costs. Within accrued expenses and other current liabilities, total accrued research and development costs amounted to $26.7 million as of March 31, 2026. Accrual estimates are based on a number of factors, including management’s assessment of progress towards completion of the research and development activities, invoicing to date under the contracts, communication from the research organization or other companies of any actual costs incurred during the period that have not

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yet been invoiced, and the costs included in the contracts. Significant judgments and estimates are made by management in determining the accrued balances at the end of any reporting period.

The principal considerations for our determination that performing procedures relating to accrued research and development costs is a critical audit matter are (i) the significant judgment by management in developing the estimate of the accrued research and development costs and (ii) a high degree of auditor judgment and effort in performing procedures related to the accrued research and development costs.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included, among others, (i) testing management’s process for developing the estimate of accrued research and development costs; (ii) evaluating the appropriateness of the methodology used by management to develop the estimate; (iii) evaluating the reasonableness of management’s estimate of accrued external research and development costs by (a) testing the completeness and accuracy of costs incurred, on a sample basis, by tracing information to the underlying contracts, purchase orders, invoices and information received from the research organization or other companies, as applicable, and (b) evaluating the reasonableness of the estimated costs incurred for the services that have not been invoiced, on a sample basis, by tracing to underlying supporting documentation, such as underlying contracts, purchase orders and information received from research organizations or other companies, as applicable.

/s/ PricewaterhouseCoopers LLP

Florham Park, New Jersey

June 29, 2026

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

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REPLIMUNE GROUP, INC.

CONSOLIDATED BALANCE SHEETS

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

Assets

Current assets:

Research and development incentives receivable 1,619 3,725

Prepaid expenses and other current assets 8,611 8,351

Right-of-use asset – operating leases 3,270 3,998

Liabilities and Stockholders’ Equity

Current liabilities:

Accrued expenses and other current liabilities 47,516 45,916

Operating lease liabilities, current 1,158 1,184

Finance lease liabilities, current 2,883 2,799

Operating lease liabilities, non-current 2,328 3,076

Finance lease liabilities, non-current 21,909 22,729

Other liabilities, non-current 455 941

Commitments and contingencies (Note 13)

Stockholders’ equity:

Accumulated other comprehensive income 5,403 5,448

Total liabilities and stockholders’ equity $ 332,388 $ 551,328

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

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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 1,604 1,773

Interest expense on finance lease liability (2,063) (2,118)

Interest expense on debt obligations (6,796) (5,775)

Income tax (benefit) provision (551) 468

Net loss per common share, basic and diluted $ (3.38) $ (3.07)

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

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REPLIMUNE GROUP, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(Amounts in thousands)

Year Ended March 31,

Other comprehensive loss:

Foreign currency translation gain (loss) 255 174

Net unrealized (loss) gain on short-term investments (300) 419

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

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REPLIMUNE GROUP, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Amounts in thousands, except share amounts)

Shares Amount

Foreign currency translation adjustment — — — — 174 174

Unrealized gain on short-term investments — — — — 419 419

Exercise of pre-funded warrants 739,225 1 (1) — — —

Stock-based compensation expense — — $ 35,044 — — $ 35,044

Foreign currency translation adjustment — — — — 255 255

Unrealized loss on short-term investments — — — — (300) (300)

Stock-based compensation expense — — 32,272 — — 32,272

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

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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 3,332 3,502

Operating lease, right-of-use-asset amortization 771 683

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

Impairment on property, plant and equipment 188 —

Unrealized foreign currency transaction gains (942) (201)

Changes in operating assets and liabilities:

Research and development incentives receivable 451 1,303

Prepaid expenses and other current assets (232) (252)

Other non-current assets — (1,200)

Accrued expenses and other current liabilities 2,184 11,743

Operating lease liabilities (818) (720)

Other non-current liabilities (487) 155

Cash flows from investing activities:

Proceeds from sales and maturities of short-term investments 392,960 386,477

Net cash provided by (used in) investing activities 310,843 (23,796)

Cash flows from financing activities:

Proceeds from issuance of common stock, net of fees and offering costs — 155,728

Proceeds from long-term debt 35,000 —

Principal payment of finance lease obligation (736) (599)

Proceeds from exercise of stock options and pre-funded warrants 883 267

Net cash provided by financing activities 66,294 252,396

Net increase in cash, cash equivalents and restricted cash 97,905 36,665

Cash, cash equivalents and restricted cash at beginning of period 112,822 76,157

Cash, cash equivalents and restricted cash at end of period $ 210,727 $ 112,822

Supplemental disclosure of cash flow information:

Cash paid during the period for interest 4,688 $ 4,198

Cash received (paid) for income taxes, net 5 (105)

Supplemental disclosure of non-cash investing and financing activities:

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

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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 committed to applying our leading expertise in the field of oncolytic immunotherapy to transform the lives of cancer patients through our novel oncolytic immunotherapies. 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 $313.9 million and $247.3 million for the years ended March 31, 2026 and 2025, respectively. In addition, as of March 31, 2026, the Company had an accumulated deficit of $1,262.5 million.

In accordance with ASC 205-40, Presentation of Financial Statements—Going Concern, management has evaluated whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the Company's ability to continue as a going concern within one year after the date these consolidated financial statements are issued. Based on its current operating plan, the Company expects to continue to generate operating losses for the foreseeable future and that its existing cash, cash equivalents and short-term investments will be sufficient to fund its operating expenses and capital expenditure requirements only into the first calendar quarter of 2027, which is less than one year from the date these consolidated financial statements are issued. The Company does not have any committed source of additional funding and will be required to obtain additional financing to fund its operations beyond that date. These conditions raise substantial doubt about the Company's ability to continue as a going concern.

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

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

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 income (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.

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, 2026 and 2025, respectively. As of March 31, 2026 and 2025, the amount of cash equivalents included in cash and cash equivalents totaled $120.3 million and $89.9 million, respectively.

Restricted cash

The Company holds restricted cash in segregated bank accounts in connection with a letter of credit. As of March 31, 2026 and 2025, restricted cash consisted of $1.7 million, respectively, held for the benefit of the landlords in connection with our leases and for the Company's credit card program in the United Kingdom. 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 income (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 debt 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 investment income. For available-for-sale debt 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

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

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 investment 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 comprehensive loss.

No credit-related losses or impairments have been recognized on the Company's investments in available-for-sale debt securities during the years ended March 31, 2026 or 2025.

The Company’s short-term investments as of March 31, 2026 and 2025 had maturities of less than one year. 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:

Estimated Useful life

Office equipment 5 years

Computer equipment 3 years

Plant, manufacturing and laboratory equipment 5 years

Capitalized software 3 to 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.

Capitalized software as a service costs represent implementation costs incurred during the application development stage and are included in "property, plant and equipment, net" on the Company's consolidated balance sheet. Such costs are amortized on a straight-line basis over the term of the associated arrangement plus any reasonably certain renewal period. Costs incurred during the preliminary project stage and the post-implementation-operation stage are expensed as incurred.

Inventory

Prior to the regulatory approval of the Company’s product candidates, the Company incurs expenses for the manufacture of drug product that could potentially be available to support the commercial launch of those products. Until the date at which regulatory approval has been received or is otherwise considered probable, the Company records all such costs as research and development expenses. There were no capitalized inventory costs recorded as of March 31, 2026 and 2025.

Impairment of long-lived assets

Long-lived assets consist of property, plant and equipment, right-of-use-asset - operating leases, and right-of-use-asset - finance leases. 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

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

carrying value of the impaired asset group over its fair value, determined based on discounted cash flows. To date, the Company has recorded immaterial 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 at each balance sheet date 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 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 on a consolidated basis 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

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

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. Accrual estimates are based on a number of factors, including management’s assessment of progress towards completion of the research and development activities, invoicing to date under the contracts, communication from the research organization or other companies of any actual costs incurred during the period that have not yet been invoiced, and the costs included in the contracts. When billing terms under these contracts do not coincide with the timing of when the work is performed, management is required to make estimates of outstanding obligations to those third parties as of the end of the reporting period. 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 award 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. To date, the Company has issued stock-based awards in the form of restricted stock units, or RSUs, performance stock units, or PSUs, and stock option grants. Forfeitures for all awards are accounted for as they occur.

The grant date fair value for RSUs and PSUs is based on the closing price of the Company's common stock on the date of grant. The Company’s RSUs have service-based vesting conditions and the related expense for these awards is recorded using the straight-line method. The Company's PSUs have performance-based vesting conditions and expense is recognized when the achievement of the performance condition is probable.

The grant date fair value of each stock option grant is estimated 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). Expense for these awards is recorded using the straight-line method over the vesting period of the respective award.

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

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 16.2%.

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

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

from research and development incentives of $1.6 million and $1.8 million during the years ended March 31, 2026 and 2025, respectively, in the consolidated statements of operations and a research and development incentives receivable of $1.6 million and $3.7 million as of March 31, 2026 and 2025, 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, 2026, comprehensive loss included $0.3 million of unrealized losses on short-term investments, as well as $0.3 million of foreign currency translation gains. For the year ended March 31, 2025, comprehensive loss included $0.4 million of unrealized gains on short-term investments and $0.2 million of foreign currency translation gains.

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.

Recently Adopted Accounting Pronouncements

In December 2023, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” This ASU primarily focuses on the rate reconciliation and income taxes paid. ASU No. 2023-09 requires a public business entity (PBE) to disclose, on an annual basis, a tabular rate reconciliation using both percentages and currency amounts, broken out into specified categories with certain reconciling items further broken out by nature and jurisdiction to the extent those items exceed a specified threshold. In addition, all entities are required to disclose income taxes paid, net of refunds received disaggregated by federal, state/local, and foreign and by jurisdiction if the amount is at least 5% of total income tax payments, net of refunds received. For PBEs, the new standard is effective for annual periods beginning after December 15, 2024, with early adoption permitted. An entity may apply the amendments in this ASU prospectively by providing the revised disclosures for the first period ending December 31, 2025 or later, and continuing to provide the pre-ASU disclosures for the prior periods, or may apply the amendments retrospectively by providing the revised disclosures for all period presented. For the year ended March 31, 2026, the Company adopted this

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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

guidance in the current year on a prospective basis. As this accounting standard only impacts disclosures, it did not have an impact on the Company's consolidated financial results. Refer below to Note 15 - Income taxes for disclosure updates as a result of this ASU.

Recently Issued Accounting Pronouncements

In November 2024, the FASB issued ASU-2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Topic 220): Disaggregation of Income Statement Expenses. The ASU requires more detailed information about specified categories of expenses (purchases of inventory, employee compensation, depreciation, amortization, and depletion) included in certain expense captions presented on the face of the income statement. This ASU is effective for fiscal years beginning after December 15, 2026, and for interim periods within fiscal years beginning after December 15, 2027. Early adoption is permitted. The amendments may be applied either (1) prospectively to financial statements issued for reporting periods after the effective date of this ASU or (2) retrospectively to all prior periods presented in the financial statements. The Company is currently evaluating the impact of adopting this ASU on its consolidated financial statements and related disclosures.

In September 2025, the FASB issued ASU 2025-06, "Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40) Targeted Improvements to the Accounting for Internal-Use Software (ASU 2025-06)", which is intended to simplify the capitalization guidance for internal-use software by removing references to project stages and clarifying when the capitalizing of eligible costs is required. The new guidance is effective for annual periods beginning after December 15, 2027, and interim periods within those fiscal years, with early adoption permitted. ASU 2025-06 may be applied retrospectively or prospectively. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements and related disclosures.

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, 2026 Using:

Level 1 Level 2 Level 3 Total

Cash equivalents:

Short-term investments:

US Government Agency bonds — 3,984 — 3,984

Fair Value Measurements as of March 31, 2025 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, 2026 and 2025, there were no transfers between levels.

Valuation of cash equivalents and short-term investments

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)

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

3. Fair value of financial assets and liabilities (Continued)

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 both money market funds and U.S. Government Agency bonds at March 31, 2026 and money market funds at March 31, 2025.

4.Short-term investments

As of March 31, 2026 and 2025, the Company's available-for-sale investments by type, consisted of the following:

US Government agency bonds $ 3,985 $ — $ (1) $ — $ 3,984

As of March 31, 2026 and 2025, available-for-sale securities consisted of investments that mature within one year.

5.Property, plant and equipment, net

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

Plant, manufacturing and laboratory equipment 12,325 10,877

Less: Accumulated depreciation and amortization (16,731) (13,399)

Depreciation and amortization expense was $3.3 million and $3.5 million for the years ended March 31, 2026 and 2025, respectively, and recorded within research and development and selling, general and administrative expenses in the consolidated statement of operations.

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

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

6.Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following:

Accrued research and development costs $ 26,740 $ 19,606

Accrued compensation and benefits costs 17,483 20,080

Accrued professional fees 537 161

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 closing date, and at the Company's sole option, could have drawn, but did not draw down, an additional $30.0 million on or prior to September 30, 2023. The Company can also draw 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 Loan Agreement was subsequently amended (the "Amendment") on June 28, 2023 pursuant to which the Company agreed to draw an initial term loan advance in an aggregate principal amount not less than $30.0 million, provided that the aggregate amount of the term loan advances made under tranche 1 do not exceed $30.0 million, which reflects a decrease of $30.0 million from the $60.0 million in the original Loan Agreement for tranche 1. The total amount of the Loan Agreement, as well as the outstanding balance of the loan, was unchanged, but the option to borrow additional funds were redistributed from tranche 1 to tranche 2.

A second amendment was made to the Loan Agreement (the "Second Amendment") on December 22, 2023 pursuant to which the Company agreed to draw a term loan advance in an aggregate principal amount not less than $15.0 million, provided that the aggregate amount of the term loan advances made under tranche 2 do not exceed $15.0 million on or prior to December 31, 2023. The Second Amendment re-allocated the total future consideration of the Loan Agreement to the future tranches extending through September 2026, subject to the terms and conditions of the Loan Agreement. The Second Amendment did not change the total aggregate maximum principal amount to be drawn under the Loan Agreement, which remained up to $200.0 million. Upon closing of the Second Amendment on December 22, 2023, the Company drew down the tranche 2 amount of $15.0 million.

A third amendment was made to the Loan Agreement (the "Third Amendment") on January 29, 2026 (the "Third Amendment Closing Date") pursuant to which the Company drew down the tranche 3 loan advance amount of $35.0 million. The Third Amendment maintains a $200.0 million maximum principal amount and re-allocates the future tranches extending through December 2027, subject to the terms and conditions of the Loan Agreement.

In addition, the Third Amendment extends the amortization date, with a balloon payment, inclusive of accrued interest and principal due on the maturity date of October 1, 2027. The Third Amendment provides that if the Company receives FDA approval prior to October 1, 2027, the amortization and maturity date shall be extended to October 1, 2029. Borrowings under the Loan Agreement are repayable in monthly interest-only payments through September 2027, with the outstanding principal balance of the Term Loan Facility bearing interest payable in cash at a floating rate per annum equal to the greater of (i) 8.50% and (ii) the Prime Rate plus 1.75%.

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)

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

7. Long-term debt (Continued)

The principal balance of the Term Loan Facility will also 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.

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 Third Amendment Closing Date, 2.0% after 12 months following the Third Amendment 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 the Company to maintain unrestricted cash in an amount not less than 35% of the aggregate outstanding secured obligations under the Loan Agreement 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, as amended, also contains a financial covenant that beginning on the later of (i) July 1, 2026 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, 2026 and 2025, the amount accrued for the final payment was $1.7 million and $1.0 million, respectively.

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 $0.5 million and $0.9 million were recorded in other assets as of March 31, 2026 and 2025, respectively, 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, 2026 and 2025 was $6.8 million and $5.8 million, respectively.

The summary of obligations under the term loan as of March 31, 2026 and 2025 consisted of the following (in thousands):

Facility charge and diligence fee (120) (201)

Unamortized issuance costs (536) (901)

The annual principal payments by fiscal year due under the Loan Agreement as of March 31, 2026 were as follows:

The table of future payments of long-term debt excludes the end of term charge of $4.0 million, which is due upon the maturity of the loan.

8.Stockholders’ Equity

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REPLIMUNE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)

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

8. Stockholders’ Equity (Continued)

Common stock

As of March 31, 2026 and 2025, 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 1,569,457 2,119,283

Employee stock purchase plan, available for future grants 4,102,399 3,405,175

REPL US Equity

REPL · 10-K · period ended 2026-03-31

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 Foreign 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 2026-03-31

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 Foreign 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