Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following should be read in conjunction with our consolidated financial statements and related notes beginning on page F-1 of this Annual Report. The following discussion contains forward-looking statements. Actual results may differ significantly from those projected in the forward-looking statements. See “Cautionary Note Concerning Forward-Looking Statements” on page 3 of this Annual Report. Factors that might cause future results to differ materially from those projected in the forward-looking statements also include, but are not limited to, those discussed in “Item 1A—Risk Factors” and elsewhere in this Annual Report. A detailed discussion of our 2023 financial condition and results of operations, and of 2024 year-over-year changes as compared to 2023, can be found in “Item 7—Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended December 31, 2024, which was filed with the SEC on February 12, 2025.

Overview

We have a portfolio of proprietary products that we manufacture, market and/or sell in the U.S., which in 2025 was comprised of ARISTADA, ARISTADA INITIO, LYBALVI and VIVITROL. We also earned manufacturing and/or royalty revenues on net sales of products commercialized by our licensees, the most significant of which in 2025 were the long-acting INVEGA products and VUMERITY. We expect ARISTADA, ARISTADA INITIO, LYBALVI, VIVITROL and VUMERITY, and our new product, LUMRYZ, which we acquired and began to market and sell in the U.S. in February 2026, to generate significant revenues for us in the near- and medium-term as we believe these products are singular or competitively advantaged products in their classes.

In 2025, our net income from continuing operations was $241.7 million, as compared to $372.1 million in 2024. The decrease in net income from continuing operations of $130.5 million was primarily due to an increase in total expenses of $84.9 million and a decrease of $182.8 million in manufacturing and royalty revenues. These items were partially offset by an increase in product sales, net of $101.1 million and a decrease in our income tax provision of $21.8 million. These items are discussed in further detail within the “Results of Operations” section below.

Business Update

In October 2025, we entered into the Transaction Agreement with Avadel, which was subsequently amended in November 2025, pursuant to which we agreed to acquire the entire issued and to be issued ordinary share capital of Avadel for consideration of (i) $21.00 per Avadel Share, payable in cash at closing and (ii) a non-transferable CVR entitling holders of Avadel Shares to a potential additional cash payment of $1.50 per Avadel Share, contingent upon achievement of a certain specified milestone. On February 12, 2026, we successfully completed the Avadel Acquisition, adding both LUMRYZ to our portfolio of proprietary commercial products and a commercial organization with experience in narcolepsy. During the three months ended December 31, 2025, we incurred costs of approximately $10.0 million in connection with the Avadel Acquisition.

In May 2024, we completed the sale of the Athlone Facility to Novo and entered into subcontracting arrangements to continue certain development and manufacturing activities performed at the Athlone Facility, which concluded by the end of 2025.

Results of Operations

Product Sales, Net

Our product sales, net, consisted of sales of ARISTADA, ARISTADA INITIO, LYBALVI and VIVITROL, primarily to wholesalers, specialty distributors and pharmacies. The following table presents the adjustments deducted from product sales, gross to arrive at product sales, net, for sales of these products during the years ended December 31, 2025 and 2024:

Year Ended December 31,

(In millions, except for % of Sales) 2025 % of Sales 2024 % of Sales

Adjustments to product sales, gross:

The increase in product sales, gross was due to a 19% increase in the number of units sold for LYBALVI and a 3% price increase for each of LYBALVI, ARISTADA/ARISTADA INITIO and VIVITROL that went into effect in January 2025, partially offset by decreases of 3% and 2% in the number of units sold for VIVITROL and ARISTADA/ARISTADA INITIO, respectively.

The decrease in Medicaid rebates as a percentage of sales was primarily due to gross-to-net favorability, as actual Medicaid rebates related to VIVITROL and ARISTADA/ARISTADA INITIO were lower than original estimates by approximately $26.7 million and $13.6 million, respectively.

The following table compares product sales, net earned during the years ended December 31, 2025 and 2024:

Year Ended December 31,

A number of companies currently market and/or are developing products to treat addiction, including alcohol and opioid dependence, that may compete with, and negatively impact, future sales of VIVITROL. In addition, the latest to expire of our patents covering VIVITROL will expire in 2029 in the U.S. and we expect generic versions of VIVITROL to enter the market in 2027. Pursuant to the terms of a confidential settlement and license agreement entered into in August 2023 with Teva, we granted Teva a non-exclusive, royalty-free, non-transferable, non-sublicensable limited license under the remaining patent covering VIVITROL to market and sell a generic version of VIVITROL in the U.S. beginning on the First Entry Date, or earlier under certain circumstances. Under the terms of a settlement and license agreement entered into in July 2019 with Amneal, we granted Amneal a non-exclusive license under certain patents covering VIVITROL, including the remaining patent covering VIVITROL in the U.S., to market and sell a generic formulation of VIVITROL in the U.S. beginning on the earlier of the First Entry Date, sometime in 2028 or earlier under certain circumstances, and in September 2025, entered into an authorized generic product supply agreement (the “AG Agreement”) with Amneal, pursuant to which we granted Amneal certain rights to distribute and sell in the U.S. an authorized generic version of VIVITROL for a one-year term beginning on the date of a Third Party ANDA Product Launch (as defined in the AG Agreement), subject to certain conditions set forth in the AG Agreement. Increased competition may lead to reduced unit sales of VIVITROL and increased pricing pressure.

A number of companies currently market and/or are developing products to treat schizophrenia and/or bipolar I disorder that may compete with and negatively impact future sales of ARISTADA, ARISTADA INITIO and LYBALVI. Increased competition may lead to reduced unit sales of ARISTADA, ARISTADA INITIO and LYBALVI and increased pricing pressure. The latest to expire of our patents covering ARISTADA and ARISTADA INITIO in the U.S. will expire in 2039; and, as such, we do not anticipate any generic versions of these products to enter the market in the near term.The latest to expire of our patents covering LYBALVI in the U.S. will expire in 2041. We are currently engaged in Paragraph IV litigation with certain entities in respect of certain of the Company’s patents related to LYBALVI with expiration dates between 2032 and 2041. For a discussion of these legal proceedings, see Note 19, Commitments and Contingent Liabilities in the “Notes to Consolidated Financial Statements” in this Annual Report and for information regarding the risks relating to these legal proceedings, see “Risks Related to our Intellectual Property—Uncertainty

over IP in the biopharmaceutical industry has been the source of litigation and other legal proceedings, and we and our licensees have previously and may in the future face claims against IP rights covering our products and competition from generic drug manufacturers”.

Manufacturing and Royalty Revenues

Substantially all of our manufacturing revenue was recognized at the point in time that the product has been fully manufactured. Royalties earned on our licensees’ net sales of products using our proprietary technologies and our licensed product were recognized in the period such products were sold by our licensees. The following table compares manufacturing and royalty revenues earned in the years ended December 31, 2025 and 2024:

Year Ended December 31,

Manufacturing and royalty revenues:

Manufacturing and royalty revenues $ 291.3 $ 474.1 $ (182.8 )

The decrease in royalty revenues related to the long-acting INVEGA products was primarily due to the expiration of our royalty on net sales of INVEGA SUSTENNA in the U.S. in August 2024. Although we expect royalty revenues related to U.S. net sales of INVEGA TRINZA and INVEGA HAFYERA through certain specified dates in 2030, total royalty revenues from net sales of the long-acting INVEGA products have been, and we expect will continue to be lower as the royalty revenues related to U.S. net sales of INVEGA SUSTENNA comprised a significant portion of the overall royalty revenues from the long-acting INVEGA products. In addition, INVEGA SUSTENNA is currently subject to Paragraph IV litigation in response to companies seeking to market generic versions of such product. Though we no longer receive royalties from INVEGA SUSTENNA in the U.S., increased competition from new products or generic versions of any one or more of the long-acting INVEGA products may lead to reduced unit sales of all of the long-acting INVEGA products, including those not yet genericized, and increased pricing pressure.

For additional discussion of our agreements with Janssen related to the long-acting INVEGA products, including the royalty provisions set forth therein and the related completed arbitration proceedings and outcome, see the section entitled “Collaborative Arrangements—Janssen” in “Item 1—Business” in this Annual Report.

The decrease in VUMERITY revenue was due to a $22.8 million decrease in manufacturing revenue, primarily due to a reduction in the number of batches manufactured for sale to Biogen, partially offset by a $19.2 million increase in royalty revenue, due to an increase in end-market sales of the product. For a discussion of our agreements with Biogen related to VUMERITY, including the manufacturing and royalty revenue provisions set forth therein, see the section entitled “Collaborative Arrangements—Biogen” in “Item 1—Business” in this Annual Report.

The decrease in revenue related to RISPERDAL CONSTA was primarily due to a $3.6 million decrease in manufacturing revenue, primarily due to a decrease in the number of batches made available to Janssen for sale in the U.S., which has a higher selling price than product sold outside of the U.S. We expect revenues from RISPERDAL CONSTA to continue to decrease as patents covering RISPERDAL CONSTA continue to expire in markets where end-market net sales of RISPERDAL CONSTA occur. We are aware of generic and other competition to RISPERDAL CONSTA that may lead to reduced unit sales and increased pricing pressure. For a discussion of our agreements with Janssen related to RISPERDAL CONSTA, including the manufacturing provisions set forth therein, see the section entitled “Collaborative Arrangements—Janssen” in “Item 1—Business” in this Annual Report.

The decrease in Other manufacturing and royalty revenue was primarily due to a $36.6 million decrease in revenue from FAMPYRA, as our manufacturing obligations for FAMPYRA concluded on December 31, 2024, and a $10.5 million decrease in manufacturing revenue from certain of our other legacy products.

Certain of our manufacturing and royalty revenues are earned in countries outside of the U.S. and are denominated in currencies in which the product is sold. See “Item 7A—Quantitative and Qualitative Disclosures about Market Risk” in this Annual Report for information on currency exchange rate risk related to our revenues and “Item 1A—Risk Factors” in this Annual Report, and specifically the section entitled “Currency exchange rates may affect revenues and expenses” for risks related to currency exchange rates.

Costs and Expenses

Cost of Goods Manufactured and Sold

Year Ended December 31,

Cost of goods manufactured and sold $ 196.5 $ 245.3 $ (48.8 )

The decrease in the cost of goods manufactured and sold was primarily related to a $43.7 million decrease in the cost of goods manufactured for certain legacy products following the sale of the Athlone Facility in May 2024. We also had decreases in the cost of goods sold for certain of our proprietary products, primarily due to decreases in costs related to out-of-specification batches and investigation costs. These decreases were partially offset by an increase in the cost of goods sold for LYBALVI due to an increase in the number of units sold, as discussed above.

Research and Development Expenses

For each of our R&D programs, we incur both external and internal expenses. External R&D expenses include fees for clinical and preclinical activities performed by CROs, consulting fees, and costs related to laboratory services, the purchase of drug product materials and third-party manufacturing development activities. Internal R&D expenses include employee-related expenses, occupancy costs, depreciation and general overhead. We track external R&D expenses for each of our development programs; however, internal R&D expenses are not tracked by individual program as they can benefit multiple development programs or our products or technologies in general.

The following table sets forth our external R&D expenses for the years ended December 31, 2025 and 2024 relating to our then-current development programs and our internal R&D expenses, listed by the nature of such expenses:

Year Ended December 31,

External R&D expenses:

Development programs:

Internal R&D expenses:

Research and development expenses $ 324.0 $ 245.3 $ 78.7

These amounts are not necessarily predictive of future R&D expenses. In an effort to allocate our spending most effectively, we continually evaluate our products under development based on the performance of such products in preclinical and/or clinical trials, our expectations regarding the likelihood of their regulatory approval and our view of their future potential commercial viability, among other factors.

The increase in expenses related to alixorexton was primarily due to increased spend related to the advancement of the development program for the product, including initiation of our Vibrance-3 phase 2 clinical study, costs related to the completion of our Vibrance-1 and Vibrance-2 phase 2 studies, startup costs related to planning for our phase 3 clinical program and costs related to our long-term extension study for the product. The increase in other external R&D expenses was primarily due to activities associated with our preclinical development programs. We expect R&D expense to increase in 2026, as we plan to initiate the phase 3 program for alixorexton and as ALKS 4510 and ALKS 7290, two internal early-stage development candidates which entered the clinic in 2025, advance.

The increase in employee-related expenses was primarily due to increases in labor and benefits expense related to a 7% increase in R&D-related headcount during 2025.

Selling, General and Administrative Expenses

Year Ended December 31,

Selling, general and administrative expense $ 701.5 $ 645.2 $ 56.3

The increase in selling and marketing expense was primarily due to increases of $33.3 million and $9.4 million in employee-related expenses and certain sales and marketing-related training programs and materials, respectively, due to a 10% increase in sales and marketing-related headcount, partially offset by a $9.5 million decrease in marketing spend, primarily related to decreases in media spend for our proprietary products.

The increase in general and administrative expense was primarily due to a $12.5 million increase in employee-related expenses, primarily due to a 9% increase in general and administrative-related headcount and a $10.7 million increase in professional service fees, primarily related to the Avadel Acquisition.

Other Income, Net

Year Ended December 31,

Interest income consists of interest earned on our cash and available-for-sale investments. Interest expense consisted, in 2025, of financing costs related to the amended and restated bridge term loan credit agreement that we entered into on November 18, 2025, which provided for a senior secured bridge term loan facility in an aggregate amount of up to approximately $1.5 billion to fund the Avadel Acquisition (the “Bridge Credit Agreement”) and, in 2024, of previously outstanding term loans (the “Former Term Loans”) that were scheduled to become due in 2026 under our former amended and restated credit agreement, which we prepaid in full and terminated in December 2024. See Note 11, Long-Term Debt in the “Notes to Consolidated Financial Statements” in this Annual Report for additional information regarding the Bridge Credit Agreement and Former Term Loans.

Income Tax Provision

Year Ended December 31,

The income tax provisions in 2025 and 2024 were primarily due to taxes on income earned in Ireland. Our effective tax rate during the year ended December 31, 2025 was 17.1%, which exceeds the Irish statutory tax rate of 12.5%, primarily due to non-deductible expenses and income that was taxable at rates higher than the Irish statutory tax rate. Our effective tax rate during the year ended December 31, 2024 was 16.1%. The increase in the effective tax rate was primarily due to an increase in income taxable at rates higher than the Irish statutory tax rate. The new corporate minimum tax rate of 15% did not have a material impact on our business in 2025 and 2024.

Cumulative unremitted earnings of U.S. subsidiaries totaled approximately $965.7 million as of December 31, 2025. In the event of a repatriation of those earnings in the form of dividends or otherwise, we may be liable for income taxes, subject to adjustment, if any, for foreign tax credits and foreign withholding taxes payable to foreign tax authorities. We estimate that approximately $70.0 million of income taxes would be payable on the repatriation of the unremitted earnings to Ireland.

As of December 31, 2025, we had $210.2 million of Irish NOL carryforwards, $13.6 million of U.S. federal NOL carryforwards, $43.2 million of state NOL carryforwards and $35.2 million of state tax credits which will either expire on various dates through 2040 or can be carried forward indefinitely. These loss and credit carryforwards are available to reduce certain future Irish and foreign taxable income and tax. These loss and credit carryforwards are subject to review and possible adjustment by the appropriate taxing authorities, and may be subject to limitations based upon changes in the ownership of our ordinary shares. Included within these loss and credit carryforwards are $13.6 million of U.S. federal NOL carryforwards and $5.3 million of state NOL carryforwards, acquired as part of the acquisition of Rodin Therapeutics, Inc. in November 2019, each of which are subject to a $0.5 million annual limitation.

Liquidity and Capital Resources

Our financial condition is summarized as follows:

(In millions) U.S. Ireland Total U.S. Ireland Total

At December 31, 2025, our investments consisted of the following:

Gross

Amortized Unrealized Allowance for Estimated

(In millions) Cost Gains Losses Credit Losses Fair Value

Investments—short-term available-for-sale $ 198.7 $ 0.9 $ — $ — $ 199.6

Investments—long-term available-for-sale — — — — —

Investments—long-term held-to-maturity 0.1 — — — 0.1

Sources and Uses of Cash

We generated $520.8 million and $439.1 million of cash from operating activities during the years ended December 31, 2025 and 2024, respectively. In connection with the Avadel Acquisition, we placed $731.2 million in escrow to finance the portion of the consideration in excess of the commitments secured under the Bridge Credit Agreement. In December 2024, we prepaid our previously outstanding long-term debt without penalty in the amount of $289.5 million and, during the course of 2024, repurchased approximately $200.0 million of our ordinary shares. We expect that our existing cash, cash equivalents, restricted cash and investments will be sufficient to finance our anticipated working capital and other cash requirements, including debt services and capital expenditures, for at least the twelve months following the date from which our financial statements were issued. Subject to market conditions, interest rates and other factors, we may pursue opportunities to obtain financing in the future, including debt and equity offerings, corporate collaborations, bank borrowings, arrangements relating to assets or other financing methods or structures.

Our investment objectives are, first, to preserve liquidity and conserve capital and, second, to generate investment income. We mitigate credit risk in our cash reserves by maintaining a well-diversified portfolio that limits the amount of investment exposure as to institution, maturity and investment type. Our available-for-sale investments consist primarily of short and long-term U.S. government and agency debt securities and corporate debt securities. Our held-to-maturity investments consist of investments that are held as collateral under certain letters of credit related to certain of our lease agreements.

We classify available-for-sale investments in an unrealized loss position that do not mature within 12 months as long-term investments. We have the intent and ability to hold these investments until recovery, which may be at maturity, and it is more-likely-than-not that we would not be required to sell these securities before recovery of their amortized cost.

We have no off-balance sheet arrangements that are reasonably likely to have a material effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures, or capital resources in the next 12 months.

Information about our cash flows, by category, is presented in the accompanying consolidated statements of cash flows. The discussion of our cash flows that follows does not include the impact of any adjustments to remove discontinued operations and is stated on a total company consolidated basis. The following table summarizes our cash flows for the years ended December 31, 2025 and 2024:

Year Ended December 31,

Cash, cash equivalents and restricted cash, beginning of period $ 291.1 $ 457.5

Cash flows provided by operating activities 520.8 439.1

Cash flows provided by (used in) investing activities 295.5 (111.3 )

Cash flows provided by (used in) financing activities 12.4 (494.1 )

Cash, cash equivalents and restricted cash, end of period $ 1,119.8 $ 291.2

Operating Activities

Cash flows provided by operating activities represent the cash receipts and disbursements related to all of our activities other than investing and financing activities. Operating cash flow is derived by adjusting our net income for non-cash operating items such as depreciation, amortization and share-based compensation and changes in operating assets and liabilities, which reflect timing differences between the receipt and payment of cash associated with transactions and when they are recognized in our results of operations.

Cash flows provided by operating activities during 2025 primarily consisted of net income of $241.7 million, adjusted for non-cash items, including share-based compensation of $98.7 million, depreciation and amortization of $27.2 million, deferred income taxes of $28.8 million and $119.1 million of changes in working capital.

Cash flows provided by operating activities during 2024 primarily consisted of net income of $367.1 million, adjusted for non-cash items, including share-based compensation of $96.6 million, depreciation and amortization of $28.5 million and deferred income taxes of $40.5 million, partially offset by changes in working capital of $97.4 million.

Investing Activities

Cash flows provided by investing activities during 2025 primarily consisted of $333.1 million of net proceeds from the sale and maturities of investments, partially offset by the purchase of $40.4 million of property, plant and equipment. Cash flows used in investing activities during 2024 primarily consisted of $176.2 million in net purchases of investments and the purchase of $33.5 million of property, plant and equipment. These outflows were partially offset by proceeds from the sale of the Athlone Facility and related business of $97.9 million.

We expect to spend approximately $40.0 million to $50.0 million during the year ending December 31, 2026 for capital expenditures. We continue to evaluate our manufacturing capacity based on expectations of demand for the products that we manufacture and will continue to record such amounts within construction in progress until such time as the underlying assets are placed into service, or we determine we have sufficient existing capacity and the assets are no longer required, at which time we would recognize an impairment charge. We continue to periodically evaluate whether facts and circumstances indicate that the carrying value of these long-lived assets to be held and used may not be recoverable.

Financing Activities

Cash flows provided by financing activities during 2025 were due to $43.4 million of cash that we received upon exercises of employee stock options, partially offset by $31.0 million of employee taxes paid related to the net share settlement of equity awards. Cash flows used in financing activities during 2024 primarily related to the prepayment of our previously outstanding long-term debt in the full amount of $289.5 million, payment for the repurchase of our ordinary shares and related expenses in the amount of $200.3 million, and $29.6 million of employee taxes paid related to net share settlements of equity awards, partially offset by $27.6 million of cash that we received upon exercises of employee stock options.

Debt

On February 12, 2026, in connection with the Avadel Acquisition, we entered into a credit agreement (the “Credit Agreement”), by and among Alkermes plc, as the TopCo Borrower, Alkermes, Inc., as the U.S. Borrower, Alkermes Finance LLC, as the U.S. Co-Borrower, JPMorgan Chase Bank, N.A., as Administrative Agent, Joint Lead Arranger and Joint Bookrunner, BofA Securities, Inc., as Joint Lead Arranger and Joint Bookrunner, and the lenders party thereto. The Credit Agreement provides for (i) a senior secured term loan A facility in an aggregate principal amount of up to $750.0 million (the “TLA Facility”) and (ii) a senior secured term loan B facility in an aggregate principal amount of up to $775.0 million (the “TLB Facility” and together with the TLA Facility, the “Facilities”). The TLA Facility matures on February 12, 2031, and the TLB Facility matures on August 12, 2031. On the closing date of the Facilities (the “Closing Date”), we borrowed the full $1.525 billion available under the Facilities.

Borrowings under the TLA Facility will bear interest at an annual rate of, at our option, either (i) the Term SOFR Rate (as defined in the Credit Agreement) plus a Secured Net Leverage Ratio (as defined in the Credit Agreement)-based margin, which will initially be 2.75% per annum or (ii) the Alternate Base Rate (as defined in the Credit Agreement) plus a Secured Net Leverage Ratio-based margin, which will initially be 1.75% per annum. Borrowings under the TLB Facility will bear interest at an annual rate of, at our option, either (i) the Term SOFR Rate plus a margin of 2.75% per annum or (ii) the Alternate Base Rate plus a margin of 1.75% per annum. We have agreed to pay certain fees and expenses in connection with the Facilities, as set forth in the Credit Agreement and certain related fee letters.

The Credit Agreement (other than with respect to the TLB Facility) requires the maintenance of a maximum Secured Net Leverage Ratio and a minimum Consolidated Interest Coverage Ratio (as defined in the Credit Agreement), in each case, with the levels set forth in the Credit Agreement, as of the last day of any of our fiscal quarters ending after the Closing Date. In addition, the Credit Agreement contains customary affirmative and negative covenants that apply after the Closing Date, including limitations on indebtedness, liens, mergers, consolidations, sales of assets, investments, transactions with affiliates, restricted payments and sales and leasebacks. The Credit Agreement also contains certain customary events of default, including upon a change of control.

The Credit Agreement is guaranteed by subsidiary guarantors and secured by a lien on substantially all of the assets of the borrowers and the subsidiary guarantors, whether owned as of the Closing Date or thereafter acquired.

Also on February 12, 2026, in connection with completion of the Avadel Acquisition and our entry into the Credit Agreement, we terminated the Bridge Credit Agreement entered into in order to fund the Avadel Acquisition, as the commitments under the Credit Agreement, together with our cash on hand, were sufficient to fund the Avadel Acquisition.

In December 2024, we prepaid in full all Former Term Loans under the Company’s then-in-effect amended and restated credit agreement (the “Former Credit Agreement”) for a total of $289.5 million and terminated the agreement. We did not incur any early termination penalties in connection with the termination of the Former Credit Agreement (other than customary breakage costs). All liens on the collateral securing the obligations under the Former Credit Agreement were released in connection with the termination. Such prepayment was accounted for as a debt extinguishment. See Note 11, Long-Term Debt, in the “Notes to Consolidated Financial Statements” in this Annual Report for additional discussion related to our Former Term Loans.

Discontinued Operations

Net loss from discontinued operations consists of the results of our former oncology business and is reported as a separate component of income. For additional information, see Note 15, Discontinued Operations, in the “Notes to Consolidated Financial Statements” in this Annual Report.

Critical Accounting Estimates

Our consolidated financial statements are prepared in accordance with GAAP. In connection with the preparation of our financial statements, we are required to make assumptions and estimates about future events, and apply judgments based on historical experience, current trends and other factors that management believes to be relevant at the time our consolidated financial statements are prepared. On a regular basis, we review these accounting policies, assumptions, estimates and judgments to ensure that our financial statements are presented fairly and in accordance with GAAP. However, because future events and their effects cannot be determined with certainty, actual results could differ from our assumptions and estimates, and such differences could be material.

Our significant accounting policies are discussed in Note 2, Summary of Significant Accounting Policies, of the “Notes to Consolidated Financial Statements” in this Annual Report. We believe that the following accounting estimates are the most critical to aid in fully understanding and evaluating our reported financial results, and they require our most difficult, subjective or complex judgments, resulting from the need to make estimates about the effects of matters that are inherently uncertain. We have reviewed these critical accounting estimates and related disclosures with the audit and risk committee of our board of directors.

Revenue from Contracts with Customers

We recognize revenue when our customer obtains control of promised goods or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. We recognize revenue following the five-step model prescribed under Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers, (“Topic 606”): (i) identify contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) we satisfy the performance obligations.

Product Sales, Net

Our product sales, net in 2025 and 2024 consisted of sales in the U.S. of ARISTADA, ARISTADA INITIO, LYBALVI and VIVITROL primarily to wholesalers, specialty distributors and pharmacies. Product sales, net are recognized when the customer obtains control of the product, which is when the product has been received by the customer.

Revenues from product sales are recorded net of reserves established for applicable discounts and allowances that are offered within contracts with our customers, healthcare providers or payers. Our process for estimating reserves established for these variable consideration components does not differ materially from historical practices. The transaction price, which includes variable consideration reflecting the impact of discounts and allowances, may be subject to constraint and is included in the net sales price only to the extent that it is probable that a significant reversal of the amount of the cumulative revenues recognized will not occur in a future period. Actual amounts may ultimately differ from our estimates. If actual results vary, we adjust these estimates, which could have an effect on earnings in the period of adjustment. The following are our significant categories of sales discounts and allowances:

•

Medicaid Rebates—we record accruals for rebates to U.S. states under the Medicaid Drug Rebate Program as a reduction of sales when the product is shipped into the distribution channel using the expected value. We rebate individual U.S. states for all eligible units purchased under the Medicaid program based on a rebate per unit calculation, which is based on our average manufacturer prices. We estimate expected unit sales to individuals covered by Medicaid and rebates per unit under the Medicaid program and adjust our rebate accrual based on actual unit sales and rebates per unit and changes in trends in Medicaid utilization. In 2025, actual Medicaid utilization rates related to VIVITROL and ARISTADA/ARISTADA INITIO, were lower than original estimates by approximately $26.7 million and $13.6 million, respectively. In 2024, actual Medicaid utilization rates related to VIVITROL were lower than original estimates, due, in part, to $8.7 million in actual credits received from certain states in the fourth quarter of 2024 related to duplicate Medicaid billings;

•

Chargebacks—discounts that occur when contracted indirect customers purchase directly from wholesalers and specialty distributors. Contracted customers generally purchase a product at its contracted price. The wholesaler or specialty distributor, in turn, then generally charges back to us the difference between the wholesale acquisition cost and the contracted price paid to the wholesaler or specialty distributor by the customer. The allowance for chargebacks is made using the expected value and is based on actual and expected utilization of these programs. Chargebacks could exceed historical experience and our estimates of future participation in these programs. To date, actual chargebacks have not differed materially from our estimates;

•

Product Discounts—cash consideration, including sales incentives, given by us under agreements with a number of wholesaler, distributor, pharmacy, and treatment provider customers that provide them with a discount on the purchase price of products. The reserve is made using the expected value and to date, actual product discounts have not differed materially from our estimates;

•

Product Returns—we record an estimate for product returns at the time our customers take control of our product. We estimate this liability using the expected returns of product sold based on our historical return levels and specifically identified anticipated returns due to known business conditions and product expiry dates. Return amounts are recorded as a reduction of sales. Once product is returned, it is destroyed. Actual product returns have not differed materially from our estimates; and

•

Medicare Part D—we record accruals for Medicare Part D liabilities under the Medicare Manufacturer Discount Program as a reduction of sales. Under an agreement with the Centers for Medicare and Medicaid Services, manufacturers are responsible for reimbursing Medicare for a specified percentage discount on the cost of applicable drugs during the initial coverage phase and a specified percentage discount during the catastrophic coverage phase of the Medicare Part D benefit. Actual Medicare Part D rebates have not differed materially from our estimates.

A rollforward of our provisions for sales and allowances is as follows:

Provision:

Payments and credits related to:

Provision:

Payments and credits related to:

(1)

“Contractual Adjustments” include “Medicaid Rebates” and “Medicare Part D” accruals

(2)

“Discounts” include “Chargebacks” and “Product Discounts”

Manufacturing Revenue

We recognize manufacturing revenues from the sale of products we manufacture for resale by our licensees. Substantially all of our manufacturing revenues are recognized at a point in time when control of the product passes to the licensee. The sales price for certain of our manufacturing revenues is based on the end-market sales price earned by our licensees. As end-market sales generally occur after we have recorded manufacturing revenue, we estimate the sales price for such products based on information supplied to us by our licensees, our historical transaction experience and other third-party data. Differences between actual manufacturing revenues and estimated manufacturing revenues are reconciled and adjusted for in the period in which they become known, which is generally within the same quarter. The differences between our actual and estimated manufacturing revenues have not been material to date.

Royalty Revenue

We recognize royalty revenues related to the sale by our licensees of products that incorporate our technology. All of our royalties qualify for the sales-and-usage exemption under Topic 606 as (i) such royalties are based strictly on the sales-and-usage by the licensee; and (ii) a license of IP is the sole or predominant item to which such royalties relate. Based on this exemption, such royalties are earned in the period the products are sold by our licensees and we have a present right to payment.

Certain of our royalty revenues are recognized based on information supplied to us by our licensees and require estimates to be made. Differences between actual royalty revenues and estimated royalty revenues are reconciled and adjusted for in the period in which they become known, which is generally within the same quarter. The differences between our actual and estimated royalty revenues have not been material to date.

Discontinued Operations

We determined that the separation of our former oncology business, which was completed on November 15, 2023, represented a disposal plan that met the criteria for classification of the oncology business as a discontinued operation in accordance with ASC 205-20, Discontinued Operations. Accordingly, the accompanying consolidated financial statements for all periods have been updated to present the assets and liabilities associated with the oncology business separately as discontinued operations on the consolidated balance sheet and the results of such discontinued operations reported as a separate component of income in the consolidated statements of operations and comprehensive income.

For additional information related to discontinued operations, see Note 15, Discontinued Operations, in our “Notes to Consolidated Financial Statements” in this Annual Report.

Impairment of Long-Lived Assets

Long-lived assets, other than goodwill which is separately tested for impairment, are evaluated for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. When evaluating long-lived assets for potential impairment, we first compare the carrying value of the asset to the asset’s estimated future cash flows (undiscounted and without interest charges). If the estimated future cash flows are less than the carrying value of the asset, we calculate an impairment loss. The impairment loss calculation compares the carrying value of the asset to the asset’s estimated fair value, which may be based on estimated future cash flows (discounted and with interest charges). We recognize an impairment loss if the amount of the asset’s carrying value exceeds the asset’s estimated fair value. If we recognize an impairment loss, the adjusted carrying amount of the asset becomes its new cost basis. For a depreciable long-lived asset, the new cost basis will be depreciated over the remaining useful life of that asset.

When reviewing long-lived assets for impairment, we group long-lived assets with other assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. Our impairment loss calculations contain uncertainties because they require management to make assumptions and to apply judgment to estimate future cash flows and asset fair values, including forecasting useful lives of the assets and selecting the discount rate that reflects the risk inherent in future cash flows.

Valuation of Deferred Tax Assets

We evaluate the need for deferred tax asset valuation allowances based on a more-likely-than-not standard. The ability to realize deferred tax assets depends on the ability to generate sufficient taxable income within the carryback or carryforward periods provided for in the tax law for each applicable tax jurisdiction. We consider the following possible sources of taxable income when assessing the realization of deferred tax assets:

•

future reversals of existing taxable temporary differences;

•

future taxable income exclusive of reversing temporary differences and carryforwards;

•

taxable income in prior carryback years; and

•

tax-planning strategies.

The assessment regarding whether a valuation allowance is required or should be adjusted also considers all available positive and negative evidence factors including, but not limited to:

•

nature, frequency and severity of recent losses;

•

duration of statutory carryforward periods;

•

historical experience with tax attributes expiring unused; and

•

near- and medium-term financial outlook.

We utilize a rolling three years of actual and current year anticipated results as the primary measures of cumulative income (losses) in recent years. For additional information related to our assessment of our valuation allowance, see Note 17, Income Taxes in the “Notes to Consolidated Financial Statements” in this Annual Report.

The evaluation of deferred tax assets requires judgment in assessing the likely future tax consequences of events that have been recognized in our financial statements or tax returns and future profitability. Our accounting for deferred tax consequences represents our best estimate of those future events. Changes in our current estimates, due to unanticipated events or otherwise, could have a material effect on our financial condition and results of operations. For information related to risks surrounding our deferred tax assets, see “Item 1A—Risk Factors” in this Annual Report and specifically the section entitled “Our deferred tax assets may not be realized.”

Recent Accounting Pronouncements

See Note 2, Summary of Significant Accounting Policies, “New Accounting Pronouncements” in our “Notes to Consolidated Financial Statements” in this Annual Report for discussion, if any, of new accounting standards.

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

We hold securities in our investment portfolio that are sensitive to market risks. Our securities with fixed interest rates may have their market value adversely impacted by a rise in interest rates, while floating rate securities may produce less income than expected if interest rates fall. Due in part to these factors, our future investment income may fall short of expectations due to a fall in interest rates or we may suffer losses in principal if we are forced to sell securities that decline in market value due to changes in interest rates. However, because we classify our investments in debt securities as available-for-sale, no gains or losses are recognized due to changes in interest rates unless such securities are sold prior to maturity or declines in fair value are determined to be other-than-temporary. Should interest rates fluctuate by 10%, our interest income would change by an immaterial amount over an annual period. We do not believe that we have a material exposure to interest rate risk as our investment policies specify credit quality standards for our investments and limit the amount of credit exposure from any single issue, issuer or type of investment.

We do not believe our exposure to liquidity and credit risk to be significant as approximately 49% and 51% of our investments at December 31, 2025 are in corporate debt securities with a minimum rating of A2 (Moody’s)/A (Standard and Poor’s) and debt securities issued by the U.S. government or its agencies, respectively. We have the intent and ability to hold these securities until recovery, which may be at maturity.

Currency Exchange Rate Risk

Manufacturing and royalty revenues that we receive on certain of our products and services are a percentage of the net sales made by our licensees, and a portion of these sales are made in countries outside the U.S. and are denominated in currencies in which the product is sold, which is predominantly the euro. The manufacturing and royalty payments on these non-U.S. sales are calculated initially in the currency in which the sale is made and are then converted into USD to determine the amount that our licensees pay us for manufacturing and royalty revenues. Fluctuations in the exchange ratio of the USD and these non-U.S. currencies will have the effect of increasing or decreasing our revenues even if there is a constant amount of sales in non-U.S. currencies. For example, if the USD weakens against a non-U.S. currency, then our revenues will increase given a constant amount of sales in such non-U.S. currency. For the year ended December 31, 2025, an average 10% strengthening of the USD relative to the currencies in which these products are sold would have resulted in revenues being reduced by approximately $13.9 million, as compared to a reduction in revenues of approximately $8.9 million for the year ended December 31, 2024.

We incur significant operating costs in Ireland and face exposure to changes in the exchange ratio of the USD and the euro arising from expenses and payables at our Irish operations that are settled in euro. The impact of changes in the exchange ratio of the USD and the euro on our USD-denominated revenues earned in countries other than the U.S. is partially offset by the opposite impact of changes in the exchange ratio of the USD and the euro on operating expenses and payables incurred at our Irish operations that are settled in euro. For the year ended December 31, 2025, an average 10% weakening in the USD relative to the euro would have resulted in an increase to our expenses denominated in euro of approximately $3.7 million, as compared to an increase in our expenses of approximately $3.9 million for the year ended December 31, 2024.

Item 8. Financial Statements and Supplementary Data

Selected Quarterly Financial Data (unaudited)

First Quarter Second Quarter Third Quarter Fourth Quarter Total2025

(In thousands, except per share data)

Earnings per share—basic:

From discontinued operations — — — — —

Earnings per share—diluted:

From discontinued operations — — — — —

First Quarter Second Quarter Third Quarter Fourth Quarter Total2024

(In thousands, except per share data)

Earnings (loss) per share—basic:

Earnings (loss) per share—diluted:

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Not applicable.

Item 9A. Controls and Procedures

Disclosure Controls and Procedures and Internal Control Over Financial Reporting

Controls and Procedures

Our management has evaluated, with the participation of our principal executive officer and principal financial officer, the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act), as of December 31, 2025. Based upon that evaluation, our principal executive officer and principal financial officer concluded that, as of the end of the period covered by this report, our disclosure controls and procedures were effective to provide reasonable assurance that (a) the information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and (b) such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating our disclosure controls and procedures, our management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and our management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended December 31, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Annual Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over our financial reporting as defined in Rules 13a-15(f) and 15d-15(f). Internal control over financial reporting is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act as a process designed by, or under the supervision of, the issuer’s principal executive and principal financial officers, or persons performing similar functions, and effected by the issuer’s board of directors, management and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP and includes those policies and procedures that:

•

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

•

provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that receipts and expenditures of the issuer are being made only in accordance with authorizations of management and directors of the issuer; and

•

provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the issuer’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Projections of any evaluation of effectiveness for 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.

Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2025. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in its 2013 Internal Control—Integrated Framework.

Based on this assessment, our management has concluded that, as of December 31, 2025, our internal control over financial reporting was effective.

The effectiveness of our internal control over financial reporting as of December 31, 2025 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report, which is included in this Annual Report, beginning on page F-1.

Item 9B. Other Information

Trading Plans

During the three months ended December 31, 2025, the following contracts, instructions or written plans for the purchase or sale of the Company’s securities that are or were intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act (each, a “Rule 10b5-1 plan”) were adopted by officers (as defined in Rule 16a-1(f) under the Exchange Act) and directors of the Company: (i) on November 7, 2025, Samuel Parisi, our Vice President, Finance and Interim Principal Accounting Officer, adopted a Rule 10b5-1 plan providing for the sale of up to 10,055 ordinary shares of the Company that may be obtained from the vesting of restricted stock unit awards; this plan is scheduled to expire on December 31, 2026; (ii) on November 19, 2025, David Gaffin, our Executive Vice President, Chief Legal Officer, Chief Compliance Officer and Secretary, adopted a Rule 10b5-1 plan providing for the sale of up to 77,518 ordinary shares of the Company that may be obtained from the exercise of vested stock options and the sale of up to 20,341 ordinary shares of the Company; this plan is scheduled to expire on February 17, 2027; (iii) on November 19, 2025, Blair Jackson, our Executive Vice President, Chief Operating Officer, adopted a Rule 10b5-1 plan providing for the sale of up to 45,899 ordinary shares of the Company that may be obtained from the exercise of vested and expiring stock options; this plan is scheduled to expire on February 27, 2026; (iv) on November 19, 2025, Christian Todd Nichols, our Senior Vice President, Chief Commercial Officer, adopted a Rule 10b5-1 plan providing for the sale of up to 6,000 ordinary shares of the Company; this plan is scheduled to expire on December 31, 2026; and (v) on November 19, 2025, Richard Pops, our Chairman and Chief Executive Officer, adopted a Rule 10b5-1 plan providing for the sale of up to 305,999 ordinary shares of the Company that may be obtained from the exercise of vested and expiring stock options; this plan is scheduled to expire on February 27, 2026. During the three months ended December 31, 2025, no other directors or officers of the Company adopted or terminated a Rule 10b5-1 plan or a trading plan not intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

PART III

Item 10. Directors, Executive Officers and Corporate Governance

The information required by this item is incorporated herein by reference to our definitive proxy statement for our 2026 annual general meeting of shareholders. We expect this information will be provided under sections of the proxy statement entitled “Proposal 1—Election of Directors,” “The Role of the Board and Its Committees,” “Executive Officers,” “Other Corporate Governance Matters” and “Board Nominations, Evaluations and Refreshment” and, if required, “Delinquent Section 16(a) Reports”.

Item 11. Executive Compensation

The information required by this item (excluding, for clarity, the information required by Item 402(v) of Regulation S-K) is incorporated herein by reference to our definitive proxy statement for our 2026 annual general meeting of shareholders. We expect this information will be provided under sections of the proxy statement entitled “The Role of the Board and Its Committees,” “Director Compensation,” “Executive Compensation—Compensation Discussion and Analysis,” “Executive Compensation Tables,” “Additional Compensation Information,” “Compensation Committee Report” and “Pay Ratio”.

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

PART IV

Item 15. Exhibits and Financial Statement Schedules

(a)(1) Consolidated Financial Statements—The consolidated financial statements of Alkermes plc, as required by this item, are submitted in a separate section beginning on page F-1 of this Annual Report, as follows:

Financial Statement Page Number

Report of Independent Registered Public Accounting Firm (PCAOB ID: 238) F-1

Consolidated Balance Sheets F-3

Consolidated Statements of Operations and Comprehensive Income F-4

Consolidated Statements of Shareholders’ Equity F-5

Consolidated Statements of Cash Flows F-6

Notes to the Consolidated Financial Statements F-7

(2) Financial Statement Schedules—All schedules have been omitted because the absence of conditions under which they are required or because the required information is included in the consolidated financial statements or notes thereto.

(3) The exhibits listed in the below Exhibit Index are filed or furnished as part of this Annual Report or are incorporated into this Annual Report by reference.

EXHIBIT INDEX

Incorporated by reference herein

Exhibit No. Description of Exhibit Form Date

4.1 # Description of Securities.

Incorporated by reference herein

Exhibit No. Description of Exhibit Form Date

Incorporated by reference herein

Exhibit No. Description of Exhibit Form Date

Incorporated by reference herein

Exhibit No. Description of Exhibit Form Date

Incorporated by reference herein

Exhibit No. Description of Exhibit Form Date

10.24 # † Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Incorporated by reference herein

Exhibit No. Description of Exhibit Form Date

19.1 # Alkermes plc Insider Trading Policy.

21.1 # List of subsidiaries.

24.1 # Power of Attorney (included on the signature pages hereto).

Incorporated by reference herein

Exhibit No. Description of Exhibit Form Date

# Filed herewith.

‡ Furnished herewith.

Item 16. Form 10-K Summary

None.

SIGNATURES

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

ALKERMES PLC

By: /s/ Richard F. PopsRichard F. PopsChairman and Chief Executive Officer

POWER OF ATTORNEY

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Each person whose signature appears below in so signing also makes, constitutes and appoints Richard F. Pops and Joshua Reed, and each of them, his true and lawful attorney-in-fact, with full power of substitution, for him in any and all capacities, to execute and cause to be filed with the Securities and Exchange Commission any and all amendments to this Annual Report, with exhibits thereto and other documents in connection therewith, and hereby ratifies and confirms all that said attorney-in-fact or his substitute or substitutes may do or cause to be done by virtue hereof.

Signature Title Date

/s/ Shane M. CookeShane M. Cooke Director February 25, 2026

/s/ Richard B. GaynorRichard B. Gaynor Director February 25, 2026

/s/ Cato T. Laurencin Director February 25, 2026

Cato T. Laurencin

/s/ Nancy S. LurkerNancy S. Lurker Director February 25, 2026

/s/ Brian P. McKeonBrian P. McKeon Director February 25, 2026

/s/ Nancy L. SnydermanNancy L. Snyderman Director February 25, 2026

/s/ Frank Anders WilsonFrank Anders Wilson Director February 25, 2026

/s/ Christopher I. WrightChristopher I. Wright Director February 25, 2026

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of Alkermes plc

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Alkermes plc and its subsidiaries (the "Company") as of December 31, 2025 and 2024, and the related consolidated statements of operations and comprehensive income, of shareholders' equity and of cash flows for each of the three years in the period ended December 31, 2025, including the related notes (collectively referred to as the "consolidated financial statements"). We also have audited the Company's internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Annual Report on Internal Control over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting 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 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, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements 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. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s 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. A company’s internal control over financial reporting 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 the assets of the company; (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 receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

F-1

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.

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.

Rebate Accruals – Medicaid Drug Rebate Program

As described in Notes 2 and 10 to the consolidated financial statements, the Company’s revenues from product sales are recorded net of reserves established for applicable discounts and allowances that are offered within contracts with the Company’s customers, health care providers or payers. The Company records accruals for rebates to U.S. states under the Medicaid Drug Rebate Program as a reduction of sales when the product is shipped into the distribution channel using the expected value method. As of December 31, 2025, accrued Medicaid rebates were $186.1 million, of which a significant amount related to the Medicaid Drug Rebate Program. The Company rebates individual U.S. states for all eligible units purchased under the Medicaid program based on a rebate per unit calculation, which is based on the Company’s average manufacturer prices. The Company estimates expected unit sales to individuals covered by Medicaid and rebates per unit under the Medicaid program and adjusts its rebate accrual based on actual unit sales and rebates per unit and changes in trends in Medicaid utilization.

The principal considerations for our determination that performing procedures relating to rebate accruals for the Medicaid Drug Rebate Program is a critical audit matter are (i) the significant judgment by management due to significant measurement uncertainty involved in developing the reserves, as the reserves are based on assumptions developed using historical experience, current contractual requirements, specific known market events and payment patterns and (ii) a high degree of auditor judgment, subjectivity and effort in applying procedures and evaluating evidence related to these assumptions.

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 testing the effectiveness of controls relating to rebate accruals for the Medicaid Drug Rebate Program, including controls over the assumptions used to estimate the rebate accruals. These procedures also included, among others, (i) developing an independent estimate of the rebate accruals by utilizing third-party data related to product sales, the historical trend of actual rebate claims paid and consideration of contractual requirement changes and market events; (ii) comparing the independent estimate to management’s estimate; and (iii) testing rebate claims processed by the Company.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

February 25, 2026

We have served as the Company’s auditor since 2007.

F-2

ALKERMES PLC AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

December 31, 2025 and 2024

(In thousands, except share and per share amounts)

ASSETS

CURRENT ASSETS:

Prepaid expenses and other current assets 79,090 91,282

Contract assets — 4,990

LIABILITIES AND SHAREHOLDERS’ EQUITY

CURRENT LIABILITIES:

Accrued sales discounts, allowances and reserves 247,126 272,452

Operating lease liabilities—short-term 6,746 6,166

Contract liabilities—short-term — 1,249

OPERATING LEASE LIABILITIES—LONG-TERM 63,253 69,372

COMMITMENTS AND CONTINGENT LIABILITIES (Note 19)

SHAREHOLDERS’ EQUITY:

Accumulated other comprehensive loss (2,100 ) (1,967 )

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

F-3

ALKERMES PLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME

Years Ended December 31, 2025, 2024 and 2023

Year Ended December 31,

(In thousands, except per share amounts)

REVENUES:

Research and development revenue — 3 19

EXPENSES:

Amortization of acquired intangible assets — 1,101 35,689

OTHER INCOME, NET:

LOSS FROM DISCONTINUED OPERATIONS, NET OF TAX — (5,068 ) (163,400 )

EARNINGS PER ORDINARY SHARE:

Earnings per ordinary share - basic $ 1.47 $ 2.22 $ 2.14

Earnings per ordinary share - diluted $ 1.43 $ 2.17 $ 2.10

WEIGHTED AVERAGE NUMBER OF ORDINARY SHARES OUTSTANDING:

COMPREHENSIVE INCOME:

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

F-4

ALKERMES PLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

Years Ended December 31, 2025, 2024 and 2023

Accumulated

Additional Other

Ordinary Shares Paid-In Comprehensive Accumulated Treasury Stock

Shares Amount Capital Loss Deficit Shares Amount Total

(In thousands, except share data)

Distribution of Mural Oncology plc — — (293,760 ) — — — — (293,760 )

Repurchase of Alkermes' ordinary shares — — — — — — — —

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

F-5

ALKERMES PLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

Years Ended December 31, 2025, 2024 and 2023

Year Ended December 31,

(In thousands)

CASH FLOWS FROM OPERATING ACTIVITIES:

Adjustments to reconcile net income to cash flows from operating activities:

Changes in assets and liabilities:

Accrued sales discounts, allowances and reserves (25,326 ) 8,811 11,526

CASH FLOWS FROM INVESTING ACTIVITIES:

Proceeds from the sale of property, plant and equipment 1,086 461 354

Return of Fountain Healthcare Partners II, L.P. investment — 43 —

Proceeds from the sale of the Athlone Facility 1,708 97,933 —

CASH FLOWS FROM FINANCING ACTIVITIES:

Cash transferred to Mural Oncology plc at separation — — (275,000 )

Payment for the repurchase of ordinary shares — (200,282 ) —

Prepayment of long-term debt — (289,542 ) —

Principal payments of long-term debt — (2,250 ) (3,000 )

RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH

SUPPLEMENTAL CASH FLOW DISCLOSURE:

Non-cash investing and financing activities:

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

F-6

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

Alkermes plc is a global biopharmaceutical company that seeks to develop innovative medicines in the field of neuroscience. Alkermes has a portfolio of proprietary commercial products for the treatment of alcohol dependence and opioid dependence, schizophrenia, bipolar I disorder and narcolepsy and a pipeline of clinical and preclinical candidates in development for neurological disorders. Headquartered in Ireland, Alkermes also has a corporate office and research and development (“R&D”) center in Massachusetts and a manufacturing facility in Ohio.

In October 2025, the Company and Avadel Pharmaceuticals plc (“Avadel”) entered into a definitive transaction agreement, subsequently amended in November 2025 (the “Transaction Agreement”), pursuant to which the Company agreed to acquire the entire issued and to be issued ordinary share capital of Avadel for consideration of (i) $21.00 per ordinary share, nominal value $0.01 per share, of Avadel (each, an “Avadel Share”), payable in cash at closing and (ii) a non-transferable contingent value right (the “CVR”) entitling holders of Avadel Shares to a potential additional cash payment of $1.50 per Avadel Share, contingent upon achievement of a certain specified milestone (the “Avadel Acquisition”). The Company incurred costs of approximately $10.0 million in connection with the Avadel Acquisition during the fourth quarter of 2025. On February 12, 2026, the Company successfully completed the Avadel Acquisition, adding both LUMRYZ to the Company’s portfolio of proprietary commercial products and a commercial organization with experience in narcolepsy.

In May 2024, the Company completed the sale of its development and manufacturing facility in Athlone, Ireland (the “Athlone Facility”) and related business to Novo Nordisk (“Novo”) pursuant to an asset purchase agreement entered into in December 2023. The Company and Novo also entered into subcontracting arrangements to continue certain development and manufacturing activities performed at the Athlone Facility for a period of time after the closing of the transaction, which activities concluded by the end of 2025. In connection with the sale of the Athlone Facility, the Company received $97.9 million from Novo, which included a payment of approximately $91.0 million for the facility and certain related assets, and recorded a gain of approximately $1.5 million within “Other income (expense), net” in the accompanying consolidated statements of operations and comprehensive income for the year ended December 31, 2024.

In November 2023, the Company completed the separation of its former oncology business into Mural Oncology plc (“Mural”), a new, independent, publicly-traded company (the “Separation”). The Separation was effected by means of a distribution of all of the outstanding ordinary shares of Mural to the Company’s shareholders (the “Distribution”), in which each of the Company’s shareholders received one ordinary share, nominal value $0.01 per share, of Mural for every ten ordinary shares, par value $0.01 per share, of the Company (the “Distribution Ratio”) held by such shareholder as of the close of business on November 6, 2023, the record date for the Distribution (the “Record Date”). The historical results of the oncology business have been reflected as discontinued operations in the Company’s consolidated financial statements through November 15, 2023 (the “Separation Date”). For additional information related to the Separation, see Note 15, Discontinued Operations in these “Notes to Consolidated Financial Statements” in this Annual Report.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation

The consolidated financial statements include the accounts of Alkermes plc and its wholly-owned subsidiaries that were subsidiaries of Alkermes plc during the year ended December 31, 2025 and do not include any accounts of subsidiaries acquired in February 2026 as part of the Avadel Acquisition. Intercompany accounts and transactions have been eliminated. Columns and rows within tables may not sum due to rounding.

Reclassification

The Company has presented its former oncology business as discontinued operations in its consolidated statement of operations and comprehensive income as of December 31, 2023. See Note 15, Discontinued Operations in these “Notes to Consolidated Financial Statements” in this Annual Report for additional information.

F-7

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Discontinued Operations

The Company determined that the Separation met the criteria for classification of the former oncology business as discontinued operations in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 205, Discontinued Operations. Accordingly, the accompanying consolidated financial statements have been updated to present the results of the oncology business as discontinued operations through the Separation Date for the year ended December 31, 2023 in the consolidated statements of operations and comprehensive income.

Use of Estimates

The preparation of the Company’s consolidated financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”) requires that Company management make estimates, judgments and assumptions that may affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, judgments and methodologies, including but not limited to, those related to revenue from contracts with its customers and related allowances, impairment of intangibles and long-lived assets, share-based compensation, income taxes including the valuation allowance for deferred tax assets, valuation of investments and litigation. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions.

Cash, Cash Equivalents and Restricted Cash

Cash and cash equivalents

The Company values its cash and cash equivalents at cost plus accrued interest, which the Company believes approximates its market value. The Company considers as cash equivalents only those investments that are highly liquid, readily convertible into cash and so near their maturity (three months from the date of purchase) that they present insignificant risk of change in value because of interest rate changes.

Restricted Cash

The Company’s restricted cash balance as of December 31, 2025 represents cash held in escrow to finance the portion of the consideration for the Avadel Acquisition that is in excess of the amounts secured under the bridge term loan credit agreement, as amended and restated on November 18, 2025 (the “Bridge Credit Agreement”).

Investments

The Company has investments in various types of securities, consisting primarily of United States (“U.S.”). government and agency obligations and corporate debt securities. The Company generally holds its interest-bearing investments with major financial institutions and in accordance with documented investment policies. The Company limits the amount of credit exposure to any one financial institution or corporate issuer. The Company classifies these investments as available-for-sale, with such investments carried at fair value and unrealized gains and losses included in accumulated other comprehensive income, net of related tax. Realized gains and losses on available-for-sale debt securities are included in other income (expense), net. The Company reviews its portfolio of available-for-sale debt securities, using both quantitative and qualitative factors, to determine if declines in fair value below cost have resulted from a credit-related loss or other factors. If the decline in fair value is due to credit-related factors, a loss is recognized in net income, whereas if the decline in fair value is not due to credit-related factors, the loss is recorded in other comprehensive income.

The Company’s held-to-maturity investments are restricted investments held as collateral under letters of credit related to certain of the Company’s agreements and are included in “Investments—long-term,” in the accompanying consolidated balance sheets.

Fair Value of Financial Instruments

The Company’s financial assets and liabilities are recorded at fair value and are classified as Level 1, 2 or 3 within the fair value hierarchy, as described in the accounting standards for fair value measurement. At December 31, 2025, the Company’s financial assets consisted of cash equivalents and investments and are classified within the fair value hierarchy as follows:

•

Level 1–these valuations are based on a market approach using quoted prices in active markets for identical assets. Valuations of these products do not require a significant degree of judgment. Assets utilizing Level 1 inputs at December 31, 2025 included U.S. treasury securities, marketable securities classified as cash equivalents and a fixed term deposit account;

F-8

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

•

Level 2–these valuations are based on quoted prices for identical or similar assets in active markets or other market observable inputs such as interest rates, yield curves, foreign currency spot rates and option pricing valuation models. Assets utilizing Level 2 inputs at December 31, 2025 included U.S. government agency debt securities and investments in corporate debt securities that are trading in the credit markets; and

•

Level 3- these valuations are based on significant inputs not observable in markets. Assets utilizing Level 3 inputs at December 31, 2025 included an investments in a corporate debt security.

The carrying amounts reflected in the consolidated balance sheets for cash and cash equivalents, accounts receivable, contract assets, other current assets, accounts payable and accrued expenses and accrued sales discounts, allowances and reserves approximate fair value due to their short-term nature.

Inventory

Inventory is stated at the lower of cost and net realizable value. The Company utilizes a standard cost basis, which approximates cost determined using the first-in first-out method. Cost is determined using the first-in, first-out method. Included in inventory are raw materials used in production of preclinical and clinical products, which have alternative future use and are charged to R&D expense when consumed. The cost elements included within inventory include three primary categories for commercial products: cost of raw materials; direct labor; and overhead. Overhead is based on the normal capacity of the Company’s production facility and does not include costs from abnormally low production or idle capacity, which are expensed directly to the consolidated statement of operations and comprehensive income.

The Company capitalizes inventory costs associated with its products prior to regulatory approval when, based on management’s judgment, future commercialization of the product is considered probable and future economic benefit from such product is expected to be realized. The Company assesses the regulatory approval process and where the particular product stands in relation to that approval process, including any known safety, efficacy or quality concerns, potential labeling restrictions and other potential impediments to approval. The Company also considers the shelf life of the product in relation to the expected timeline for approval and considers issues that may prevent or delay commercialization, including issues that may arise in relation to the manufacturing of the product. The Company expenses previously capitalized costs related to pre-approval inventory upon a change in such judgment, due to, among other potential factors, a denial or significant delay of approval by relevant regulatory agencies or other issues that may make the pre-approval inventory batches less likely or unlikely to be commercialized and to result in future economic benefit.

Property, Plant and Equipment

Property, plant and equipment are recorded at cost, subject to review for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Expenditures for repairs and maintenance are charged to expense as incurred and major renewals and improvements are capitalized. Depreciation is calculated using the straight-line method over the following estimated useful lives of the assets:

Asset group Term

Buildings and improvements 25 years

Furniture, fixtures and equipment 5 - 7 years

Leasehold improvements Shorter of useful life or lease term

Goodwill

Goodwill represents the excess cost of the Company’s investment in the net assets of acquired companies over the fair value of the underlying identifiable net assets at the date of acquisition. The Company’s goodwill consists solely of goodwill created as a result of the Company’s acquisition of Elan Drug Technologies (“EDT”) from Elan Corporation, plc (such acquisition, the “Business Combination”) in September 2011 and has been assigned to one reporting unit. A reporting unit is an operating segment or one level below an operating segment or a component to which goodwill is assigned when initially recorded.

Goodwill is not amortized but is reviewed for impairment on an annual basis, as of October 31, and whenever events or changes in circumstances indicate that the carrying value of the goodwill might not be recoverable. The Company has the option to first assess qualitative factors to determine whether it is necessary to perform the quantitative impairment test. If the Company elects this option and believes, as a result of the qualitative assessment, that it is more-likely-than-not that the fair value of its reporting unit is less than its carrying amount, the quantitative impairment test is required; otherwise, no further testing is required. Alternatively, the Company may elect to not first assess qualitative factors and immediately perform the quantitative impairment test. In the quantitative impairment test, the Company compares the fair value of its reporting unit to its carrying value. If the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, then the Company would record an impairment loss equal to the difference.

F-9

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

When some, but not all, of a reporting unit is to be disposed of, the accounting for that reporting unit’s goodwill will depend on whether the disposal group constitutes a business. If the disposal group constitutes a business, the Company attributes a portion of the reporting unit’s goodwill to the disposal group based on the relative fair values of: (i) the disposal group; and (ii) the portion of the reporting unit that will be retained.

Impairment of Long-Lived Assets

The Company reviews long-lived assets to be held and used for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Conditions that would necessitate an impairment assessment include a significant decline in the observable market value of an asset; a significant change in the extent or manner in which an asset is used; a significant adverse change in legal factors or in the business climate that could affect the value of a long-lived asset; an accumulation of costs significantly in excess of the amount originally expected for the acquisition or construction of a long-lived asset; a current-period operating or cash flow loss combined with a history of operating or cash-flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-lived asset; or a current expectation that, more likely than not, a long-lived asset will be sold or otherwise disposed of significantly before the end of its previously estimated useful life. Determination of recoverability is based on an estimate of undiscounted future cash flows resulting from the use of the asset and its eventual disposition. In the event that such cash flows are not expected to be sufficient to recover the carrying amount of the assets, the assets are written-down to their estimated fair values. Long-lived assets to be disposed of are carried at fair value less costs to sell them.

Revenue from Contracts with Customers

The Company recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration which it expects to receive in exchange for those goods or services. The Company recognizes revenue following the five-step model prescribed in accordance with FASB ASC 606, Revenue from Contracts with Customers (“Topic 606”): (i) identify contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the Company satisfies the performance obligations.

Product Sales, Net

The Company’s product sales, net in 2025 and 2024 consisted of sales in the U.S. of ARISTADA®, ARISTADA INITIO® LYBALVI® and VIVITROL®, primarily to wholesalers, specialty distributors and pharmacies. Product sales, net are recognized when the customer obtains control of the product, which is when the product has been received by the customer.

Revenues from product sales are recorded net of reserves established for applicable discounts and allowances that are offered within contracts with the Company’s customers, healthcare providers or payers. The Company’s process for estimating reserves established for these variable consideration components does not differ materially from historical practices. The transaction price, which includes variable consideration reflecting the impact of discounts and allowances, may be subject to constraint and is included in the net sales price only to the extent that it is probable that a significant reversal of the amount of the cumulative revenues recognized will not occur in a future period. Actual amounts may ultimately differ from the Company’s estimates. If actual results vary, the Company adjusts these estimates, which could have an effect on earnings in the period of adjustment. The following are the Company’s significant categories of sales discounts and allowances:

•

Medicaid Rebates—the Company records accruals for rebates to U.S. states under the Medicaid Drug Rebate Program as a reduction of sales when the product is shipped into the distribution channel using the expected value method. The Company rebates individual U.S. states for all eligible units purchased under the Medicaid program based on a rebate per unit calculation, which is based on the Company’s average manufacturer prices. The Company estimates expected unit sales to individuals covered by Medicaid and rebates per unit under the Medicaid program and adjusts its rebate accrual based on actual unit sales and rebates per unit and changes in trends in Medicaid utilization. In 2025, actual Medicaid utilization rates related to VIVITROL and ARISTADA/ARISTADA INITIO, were lower than original estimates by approximately $26.7 million and $13.6 million, respectively. In 2024, actual Medicaid utilization rates related to VIVITROL were lower than original estimates, due, in part, to $8.7 million in actual credits received from certain states in the fourth quarter of 2024 related to duplicate Medicaid billings;

•

Chargebacks—discounts that occur when contracted indirect customers purchase directly from wholesalers and specialty distributors. Contracted customers generally purchase a product at its contracted price. The wholesaler or specialty distributor, in turn, then generally charges back to the Company the difference between the wholesale acquisition cost and the contracted price paid to the wholesaler or specialty distributor by the customer. The allowance for chargebacks is made using the expected value method and is based on actual and expected utilization of these programs. Chargebacks could exceed historical experience and the Company’s estimates of future participation in these programs. To date, actual chargebacks have not differed materially from the Company’s estimates;

F-10

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

•

Product Discounts—cash consideration, including sales incentives, given by the Company under agreements with a number of wholesaler, distributor, pharmacy, and treatment provider customers that provide them with a discount on the purchase price of products. The reserve is made using the expected value method and to date, actual product discounts have not differed materially from the Company’s estimates;

•

Product Returns—the Company records an estimate for product returns at the time its customers take control of their product. The Company estimates this liability using the expected returns of product sold based on historical return levels and specifically identified anticipated returns due to known business conditions and product expiry dates. Return amounts are recorded as a reduction of sales. Once product is returned, it is destroyed. To date, actual product returns have not differed materially from the Company’s estimates; and

•

Medicare Part D—the Company records accruals for Medicare Part D liabilities under the Medicare Manufacturer Discount Program as a reduction of sales. Under an agreement with the Centers for Medicare and Medicaid Services, manufacturers are responsible for reimbursing Medicare for a specified percentage discount on the cost of applicable drugs during the initial coverage phase and a specified percentage discount during the catastrophic coverage phase of the Medicare Part D benefit. Actual Medicare Part D rebates have not differed materially from the Company’s estimates.

A rollforward of the Company’s provisions for sales and allowances is as follows:

Adjustments relating to prior years (8,921 ) — 2,841 — (6,080 )

(1)

“Contractual Adjustments” include “Medicaid Rebates” and “Medicare Part D” accruals

(2)

“Discounts” include “Chargebacks” and “Product Discounts”

F-11

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Total revenue-related reserves as of December 31, 2025 and 2024, included in our consolidated balance sheets, are summarized as follows:

December 31,

Components of accrued sales discounts, allowances and reserves 247,126 272,452

Components of other long-term liabilities 47,860 41,944

Collaborative Arrangements

The Company has entered into collaborative arrangements with pharmaceutical companies including, among others, Janssen Pharmaceuticals, Inc. (“Janssen, Inc.”), Janssen Pharmaceutica International, a division of Cilag International AG (“Janssen International”), and Janssen Pharmaceutica N.V. (together with Janssen, Inc., Janssen International and their affiliates, “Janssen”) related to INVEGA SUSTENNA®/XEPLION®, INVEGA TRINZA®/TREVICTA®, INVEGA HAFYERA®/BYANNLI® (collectively, the “long-acting INVEGA products”) and RISPERDAL CONSTA®, and Biogen International GmbH (together with its affiliates, “Biogen”) related to VUMERITY®. Substantially all of the products developed under these arrangements are currently being marketed as approved products for which the Company received or receives payments for manufacturing services and/or royalties on net product sales.

Manufacturing Revenue

The Company recognizes manufacturing revenues from the sale of products it manufactures for resale by its licensees. Substantially all of the manufacturing revenues are recognized at a point in time when control of the product passes to the licensee. The sales price for certain of the Company’s manufacturing revenues is based on the end-market sales price earned by its licensees. As end-market sales generally occur after the Company has recorded manufacturing revenue, the Company estimates the sales price for such products based on information supplied to it by the Company’s licensees, its historical transaction experience and other third-party data. Differences between actual manufacturing revenues and estimated manufacturing revenues are reconciled and adjusted for in the period in which they become known, which is generally within the same quarter. The differences between the Company’s actual and estimated manufacturing revenues have not been material to date.

Royalty Revenue

The Company recognizes royalty revenues related to the sale by its licensees of products that incorporate the Company’s technologies. All of the Company’s royalties qualify for the sales-and-usage exemption under Topic 606 as (i) such royalties are based strictly on the sales-and-usage by the licensee; and (ii) a license of IP is the sole or predominant item to which such royalties relate. Based on this exemption, these royalties are earned in the period that the products are sold by the Company’s licensee and the Company has a present right to payment.

Certain of the Company’s royalty revenues are recognized by the Company based on information supplied to the Company by its licensees and require estimates to be made. Differences between actual royalty revenues and estimated royalty revenues are reconciled and adjusted for in the period in which they become known, which is generally within the same quarter. The differences between the Company’s actual and estimated royalty revenues have not been material to date.

Receivables, net

Receivables, net, include amounts billed and amounts unbilled but currently unconditionally due from customers. The amounts due are stated at their net estimated realizable value. The Company’s unbilled receivable balance was $65.8 million and $69.5 million at December 31, 2025 and 2024, respectively, and related primarily to royalty revenue. The Company maintains an allowance for doubtful accounts to provide for the estimated amounts of receivables that will not be collected. The allowance is based upon an assessment of customer creditworthiness, historical payment experience, the age of outstanding receivables and collateral to the extent applicable. The Company’s allowance for doubtful accounts was approximately $0.4 million and $0.3 million at December 31, 2025 and 2024, respectively.

Contract Assets

Contract assets include unbilled amounts that will result in a sale under certain of the Company’s manufacturing contracts. The amounts included in the contract assets table below are classified as “Current assets” in the accompanying consolidated balance sheets, as they relate to manufacturing processes that are completed in ten days to eight weeks.

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ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Contract assets consisted of the following:

(In thousands) Contract Assets

Transferred to receivables, net (2,331 )

Transferred to receivables, net (9,473 )

Contract assets at December 31, 2025 $ —

Contract Liabilities

Contract liabilities consist of contractual obligations related to deferred revenue. At December 31, 2025 and 2024, none and $1.2 million of the contract liabilities, respectively, were classified as “Contract liabilities–short-term” in the accompanying consolidated balance sheets and none of the contract liabilities in either period were classified as “Other long-term liabilities” in the accompanying consolidated balance sheets.

Contract liabilities consisted of the following:

(In thousands) Contract Liabilities

Contract liabilities at January 1, 2024 $ 4,775

Additions 34

Amounts recognized into revenue (3,560 )

Amounts recognized into revenue (2,562 )

Contract liabilities at December 31, 2025 $ —

Foreign Currency

The Company’s functional and reporting currency is the U.S. dollar. Transactions in foreign currencies are recorded at the exchange rate prevailing on the date of the transaction. The resulting monetary assets and liabilities are translated into U.S. dollars at exchange rates prevailing on the subsequent balance sheet date. Gains and losses as a result of translation adjustments are recorded within “Other income (expense), net” in the accompanying consolidated statements of operations and comprehensive income. During the years ended December 31, 2025, 2024 and 2023, the Company recorded a gain of $1.0 million and losses of $0.8 million and $0.5 million, respectively, on foreign currency translation.

Concentrations

Financial instruments that potentially subject the Company to concentrations of credit risk are receivables and marketable securities. Billings to large pharmaceutical companies and pharmaceutical wholesalers account for the majority of the Company’s receivables, and collateral is not required from these customers. To mitigate credit risk, the Company monitors the financial performance and credit-worthiness of its customers. The following represents revenue and receivables from the Company’s customers exceeding 10% of the total in each category as of, and for the years ended, December 31, 2025, 2024 and 2023:

Year Ended December 31,

Customer Receivables Revenue Receivables Revenue Receivables Revenue

Biogen * * * 11 % * 11 %

The Company holds its interest-bearing investments with major financial institutions and, in accordance with documented investment policies, the Company limits the amount of credit exposure to any one financial institution or corporate issuer. The Company’s investment objectives are, first, to ensure liquidity and conservation of capital and, second, to generate investment income.

F-13

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Geographic Information

Company revenues by geographic location for the years ended December 31, 2025, 2024 and 2023, as determined by the location of the customer, are as follows:

Year Ended December 31,

Revenue by region:

The location of the Company’s assets are as follows:

December 31,

Assets by region:

Current assets:

U.S.:

Ireland:

Long-term assets:

U.S.:

Ireland:

Property, plant and equipment, net $ 39 $ 918

Investments—long-term — 48,519

Research and Development Expenses

For each of its R&D programs, the Company incurs both external and internal expenses. External R&D expenses include fees related to clinical and preclinical activities performed by contract research organizations, consulting fees and costs related to laboratory services, purchases of drug product materials and third-party manufacturing development costs. Internal R&D expenses include employee-related expenses, occupancy costs, depreciation and general overhead. The Company tracks external R&D expenses for each of its development programs, however, internal R&D expenses are not tracked by individual program as they benefit multiple development programs or the Company’s products or technologies in general.

Selling, General and Administrative Expenses

Selling, general and administrative (“SG&A”) expenses are primarily comprised of employee-related expenses associated with selling and marketing, finance, human resources, legal, information technology and other administrative personnel, outside marketing, advertising, financial and legal expenses and other general and administrative costs.

Advertising costs are expensed as incurred. During the years ended December 31, 2025, 2024 and 2023, advertising costs totaled $89.7 million, $107.6 million and $127.6 million, respectively.

F-14

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Share-Based Compensation

The Company’s share-based compensation programs permit grants of awards in the form of stock options and restricted stock unit awards (“RSUs”), which vest with the passage of time and/or based on the achievement of certain performance criteria. The Company issues new shares upon the exercise of stock options or the vesting of RSUs. Under the terms of the Company’s stock option and incentive plans (the “Plans”), the Company’s employees may, at the discretion of the plan administrator, become eligible in certain circumstances set forth in the Plans for accelerated vesting of certain awards granted to them under the Plans. In such circumstances, if there are no effective future service requirements for such employees, the remaining fair value of any such accelerated awards would be expensed as of the date of acceleration.

Time-Based Stock Options

Except as otherwise provided in the applicable Plan or award certificate, stock option grants to employees expire ten years from the date of grant and generally vest in four equal annual installments, commencing on the first anniversary of the date of grant, provided the employee remains continuously employed or in a service relationship with the Company during the applicable vesting period. Except as otherwise provided in the applicable Plan or Award Certificate (as defined in the 2018 Plan): (i) annual stock option grants to non-employee directors expire ten years from the date of grant and generally vest over a one-year period; and (ii) stock option grants to new non-employee directors expire ten years from the date of grant and generally vest over a three-year period. The estimated fair value of options is recognized over the requisite service period, which is generally the vesting period. Share-based compensation expense is based on awards ultimately expected to vest. Forfeitures are estimated based on historical experience at the time of grant and revised in subsequent periods if actual forfeitures differ from those estimates.

The fair value of stock option grants is based on estimates as of the date of grant using a Black-Scholes option valuation model. The Company uses historical data as the basis for estimating stock option terms and forfeitures. Separate groups of employees that have similar historical stock option exercise and forfeiture behavior are considered separately for valuation purposes. The ranges of expected terms disclosed below reflect different expected behavior among certain groups of employees. Expected stock volatility factors are based on a weighted average of implied volatilities from traded options of the Company’s ordinary shares and historical share price volatility of the Company’s ordinary shares, which is determined based on a review of the weighted average of historical weekly price changes of the Company’s ordinary shares. The risk-free interest rate for periods commensurate with the expected term of the stock option is based on the U.S. treasury yield curve in effect at the time of grant. The dividend yield on the Company’s ordinary shares is estimated to be zero as the Company has not paid dividends and does not expect to pay dividends in the near future. The exercise price of options granted is equal to the closing price of the Company’s ordinary shares traded on the Nasdaq Global Select Market on the date of grant.

The fair value of each stock option granted was estimated on the grant date with the following weighted-average assumptions:

Year Ended December 31,

Expected option term 5 - 7 years 5 - 7 years 5 - 8 years

Expected stock volatility 38 % - 41 % 38 % - 42 % 40 % - 44 %

Expected annual dividend yield — — —

Time-Based Restricted Stock Unit Awards

Except as otherwise provided in the applicable Plan or award certificate, time-based RSUs awarded to employees generally vest in four equal annual installments, commencing on the first anniversary of the date of grant, provided the employee remains continuously employed or in a service relationship with the Company during the applicable vesting period. Shares subject to these RSUs are delivered to the employee upon vesting, subject to payment of applicable withholding taxes. The fair value of time-based RSUs is equal to the closing price of the Company’s ordinary shares traded on the Nasdaq Global Select Market on the date of grant. Compensation expense, including the effect of forfeitures, is recognized over the applicable service period.

Performance-Based Restricted Stock Unit Awards

Performance-based RSUs awarded to employees vest upon the achievement of certain performance criteria, typically during or following the end of a specified performance period. The estimated fair value of these performance-based RSUs are generally based on the closing price of the Company’s ordinary shares traded on the Nasdaq Global Select Market on the date of grant, unless the performance-based RSU is also subject to a market condition. In that case, the fair value of the performance-based RSU is based on a Monte Carlo simulation model. Compensation expense for performance-based RSUs is recognized from the date the Company determines the performance criteria probable of being achieved to the date the award, or relevant portion of the award, is expected to vest. Cumulative adjustments are recorded on a quarterly basis to reflect subsequent changes to the estimated outcome of the performance criteria until the date that the final outcome of the performance criteria is determined.

F-15

ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Income Taxes

The Company recognizes income taxes under the asset and liability method. Deferred income taxes are recognized for differences between the financial reporting and tax bases of assets and liabilities at enacted statutory tax rates in effect for the years in which the differences are expected to reverse. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date. In evaluating the Company’s ability to recover its deferred tax assets, the Company considers all available positive and negative evidence including its past operating results, the existence of cumulative income in the most recent fiscal years, changes in the business in which the Company operates and its forecast of future taxable income. In determining future taxable income, the Company is responsible for assumptions utilized including the amount of Irish and non-Irish pre-tax operating income, the reversal of temporary differences and the implementation of feasible and prudent tax planning strategies. These assumptions require significant judgment about the forecasts of future taxable income and are consistent with the plans and estimates that the Company is using to manage the underlying business.

The Company accounts for uncertain tax positions using a more-likely-than-not threshold for recognizing and resolving uncertain tax positions. The evaluation of uncertain tax positions is based on factors including, but not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters subject to audit, new audit activity and changes in facts or circumstances related to a tax position. The Company evaluates its tax position on a quarterly basis. The Company also accrues for potential interest and penalties related to unrecognized tax benefits in income tax expense.

Comprehensive Income

Comprehensive income consists of net income and other comprehensive income. Other comprehensive income includes changes in equity that are excluded from net income, such as unrealized holding gains and losses on available-for-sale investments.

Earnings Per Share

Basic earnings per ordinary share from continuing operations is calculated based upon net income from continuing operations available to holders of ordinary shares divided by the weighted average number of ordinary shares outstanding. Basic loss per ordinary share from discontinued operations is calculated based upon net loss from discontinued operations available to holders of ordinary shares, divided by the weighted average number of ordinary shares outstanding. For the calculation of diluted earnings (loss) per ordinary share from continuing operations and discontinuing operations, the Company utilizes the treasury stock method and adjusts the weighted average number of ordinary shares outstanding for the potential dilutive effect of outstanding ordinary share equivalents such as stock options and RSUs.

Segment Information

In November 2023, the FASB issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting: Improvements to Reportable Segment Disclosure (“Topic 280”) to establish standards for reporting information about operating segments. Operating segments are defined as components of an enterprise engaging in business activities for which separate financial information is available and regularly reviewed by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance. The Company has utilized the management approach to determine that the Company is managed as one segment on a consolidated basis and is the business of developing, manufacturing and commercializing medicines designed to address unmet medical needs of patients in major therapeutic areas. The Company’s CODM, the Chairman and Chief Executive Officer, reviews the Company’s operating results on an aggregate basis and manages the Company’s operations as a single operating unit. The CODM measures profitability on a reportable segment basis using net income (loss) and utilizes this information in allocating resources and in assessing performance by monitoring budget versus actual results. Please refer to Note 18, Segment Reporting, in these “Notes to Consolidated Financial Statements” in this Annual Report for further information.

Employee Benefit Plans

401(k) Plan

The Company maintains a 401(k) retirement savings plan (the “401(k) Plan”), which covers all of its eligible U.S.-based employees. Eligible employees may contribute up to 100% of their eligible compensation, subject to certain Internal Revenue Service (“IRS”) limitations. The Company matches 100% of employee contributions up to the first 5% of employee pay, up to IRS limits. Employee and Company contributions are fully vested when made. During the years ended December 31, 2025, 2024 and 2023, the Company contributed $16.3 million, $15.1 million and $15.0 million, respectively, to match employee deferrals under the 401(k) Plan.

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ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Defined Contribution Plan

The Company maintains a defined contribution plan for its Ireland-based employees (the “Defined Contribution Plan”). The Defined Contribution Plan provides for eligible employees to contribute up to a maximum of 40%, depending upon their age, of their total taxable earnings subject to an earnings cap of €115,000. The Company provides a match of up to 18% of taxable earnings depending upon an individual’s contribution level. During the years ended December 31, 2025, 2024 and 2023, the Company contributed $2.5 million, $3.4 million and $5.6 million, respectively, in contributions to the Defined Contribution Plan.

New Accounting Pronouncements

From time to time, new accounting pronouncements are issued by the FASB or other standard-setting bodies that are adopted by the Company as of the specified effective date. Unless otherwise discussed, the Company believes that the impact of recently issued standards that are not yet effective will not have a material impact on its financial position or results of operations upon adoption.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (“Topic 740”): Improvements to Income Tax Disclosures, to enhance the transparency and decision usefulness of income tax disclosures in order to provide information to assist key stakeholders in better assessing how the Company’s operations and related tax risks and tax planning and operational opportunities affect the Company’s tax rate and prospects for future cash flows. This ASU became effective for public companies for annual periods beginning after December 15, 2024. This guidance was applied on a retrospective basis. See Note 17, Income Taxes in these “Notes to Consolidated Financial Statements” in this Annual Report for additional information.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income-Expense Disaggregation Disclosures, to improve disclosures about a public business entity’s expenses and address requests from investors for more detailed information about the types of expenses (including purchases of inventory, employee compensation, depreciation, amortization and depletion) in commonly-presented expense captions, such as cost of sales, selling, general and administrative expenses, and research and development. All disclosure requirements under this guidance are required for public business entities and effective for annual periods beginning after December 15, 2026 and interim periods beginning after December 15, 2027. Early adoption is permitted and the amendments in this guidance will be applied prospectively to financial statements for periods after the effective dates. The Company is currently evaluating the impact this ASU will have on its consolidated financial statements and related disclosures.

In September 2025, the FASB issued ASU 2025-06, Targeted Improvements to the Accounting for Internal-Use Software. This ASU updates the requirements for capitalization of internal-use software, removing all reference to prescriptive and sequential software development stages (referred to as “project stages”). This ASU is effective for annual periods beginning after December 15, 2027, and for interim periods within those fiscal years. The Company is currently assessing the impact this ASU will have on its consolidated financial statements and related disclosures.

In December 2025, the FASB issued ASU 2025-11, Interim Reporting. The amendments in this update clarify current interim disclosure requirements and provide a comprehensive list of required interim disclosures. The update also incorporates a disclosure principle that requires entities to disclose events that occur after the end of the reporting period. This update is effective for interim periods within annual periods beginning after December 15, 2027, though early adoption is permitted. The Company is currently assessing the impact this ASU will have on its consolidated financial statements and related disclosures.

3. REVENUE FROM CONTRACTS WITH CUSTOMERS

During the years ended December 31, 2025, 2024 and 2023, the Company recorded product sales, net, as follows:

Year Ended December 31,

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ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

During the years ended December 31, 2025, 2024 and 2023, the Company recorded manufacturing and royalty revenues from its collaboration arrangements as follows:

(In thousands) ManufacturingRevenue RoyaltyRevenue Total

(In thousands) Manufacturing Revenue Royalty Revenue Total

(1)

“long-acting INVEGA products”: INVEGA SUSTENNA/XEPLION (paliperidone palmitate), INVEGA TRINZA/TREVICTA (paliperidone palmitate) and INVEGA HAFYERA/BYANNLI (paliperidone palmitate).

In November 2021, the Company received notice of partial termination of an exclusive license agreement with Janssen. Under this license agreement, the Company provided Janssen with rights to, and know-how, training and technical assistance in respect of, the Company’s small particle pharmaceutical compound technology, known as NANOCRYSTAL technology, which was used to develop the long-acting INVEGA products. When the partial termination became effective in February 2022, Janssen ceased paying royalties related to sales of INVEGA SUSTENNA, INVEGA TRINZA and INVEGA HAFYERA. Accordingly, the Company ceased recognizing royalty revenue related to sales of these products in February 2022. In April 2022, the Company commenced binding arbitration proceedings related to, among other things, Janssen’s partial termination of this license agreement and Janssen’s royalty and other obligations under the agreement. In May 2023, the arbitral tribunal (the “Tribunal”) in the arbitration proceedings issued a final award (the “Final Award”) which concluded the arbitration proceedings. The Final Award provided, among other things, that the Company was due back royalties of $195.4 million, inclusive of $8.1 million in late-payment interest related to 2022 U.S. net sales of the long-acting INVEGA products, which amount the Company received from Janssen in the second quarter of 2023, and is entitled to 2023 and future royalty revenues from Janssen related to net sales of INVEGA SUSTENNA through August 20, 2024, INVEGA TRINZA through the second quarter of 2030 (but no later than May 2030 when the license agreement expires) and INVEGA HAFYERA through May 2030 (when the license agreement expires).

Following issuance of the Final Award, the Company recognized royalty revenues related to the back royalties noted above and resumed recognizing royalty revenue related to ongoing U.S. sales of the long-acting INVEGA products. During 2023, the Company recorded $486.1 million in royalty revenue from sales of the long-acting INVEGA products, including $195.4 million in back royalties and associated interest related to net sales of the long-acting INVEGA in the U.S. in 2022, and approximately $290.7 million related to resumed recognition of royalty revenue related to worldwide net sales of the long-acting INVEGA products.

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ALKERMES PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4. INVESTMENTS

Investments consist of the following:

Gross Unrealized

Losses

ALKS US Equity

ALKS · 10-K · period ended 2025-12-31

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

Item 8. Financial Statements and Supplementary Data

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

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. Form 10-K Summary

ALKS US Equity☆

ALKS · 10-K · period ended 2025-12-31

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

Item 8. Financial Statements and Supplementary Data

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

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. Form 10-K Summary

ALKS US Equity