Commitments and Contingent Liabilities	6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	18. COMMITMENTS AND CONTINGENT LIABILITIES Contingent Consideration At June 30, 2026, the Company’s contingent consideration related to the CVR Milestone issued as part of consideration for the Avadel Acquisition. Holders of Avadel Shares as of the Closing Date are entitled to receive a potential aggregate cash payment of $165.7 million, or $1.50 per Avadel Share, upon achievement of the CVR Milestone. For additional information related to the contingent consideration, see Note 3, Business Combination, and for information related to the change in the fair value of the contingent consideration, see Note 6, Fair Value in these “Notes to Condensed Consolidated Financial Statements”. Litigation From time to time, the Company may be subject to legal proceedings and claims in the ordinary course of business. On a quarterly basis, the Company reviews the status of each significant matter and assesses its potential financial exposure. If the potential loss from any claim, asserted or unasserted, or legal proceeding is considered probable and the amount can be reasonably estimated, the Company would accrue a liability for the estimated loss. Because of uncertainties related to claims and litigation, accruals are based on the Company’s best estimates, utilizing all available information. On a periodic basis, as additional information becomes available, or based on specific events such as the outcome of litigation or settlement of claims, the Company may reassess the potential liability related to these matters and may revise these estimates, which could result in material adverse adjustments to the Company’s operating results. At June 30, 2026, there were no potential material losses from claims, asserted or unasserted, or legal proceedings that the Company determined were probable of occurring. For claims that are reasonably possible, no estimable loss or range of loss can be made. LYBALVI ANDA Litigation In August 2025, Alkermes Pharma Ireland Limited (“APIL”) and Alkermes, Inc., two wholly-owned subsidiaries of the Company, filed a patent infringement lawsuit against Teva (as defined herein) in the U.S. District Court for the District of New Jersey (the “NJ District Court”) and a patent infringement lawsuit against Apotex in each of the NJ District Court and the U.S. District Court for the District of Delaware (the “DE District Court”). In September 2025, APIL and Alkermes, Inc. filed a patent infringement lawsuit against MSN (as defined herein) in the NJ District Court. On June 18, 2026, APIL and Alkermes, Inc. filed an additional patent infringement lawsuit against Apotex in the NJ District Court, which was consolidated on July 23, 2026 with the previously filed lawsuit in the NJ District Court. As used herein, Teva refers to Teva Pharmaceuticals, Inc., Apotex refers to Apotex Inc. and Apotex Corp., and MSN refers to MSN Laboratories Private Limited (“MSN Labs”), MSN Pharmaceuticals, Inc. and Novadoz Pharmaceuticals LLC. These lawsuits were filed following receipt of “paragraph IV certification” notices from each of Teva, Apotex and MSN Labs regarding their respective filings of an abbreviated new drug application (“ANDA”) with the U.S. Food and Drug Administration (“FDA”) seeking approval to engage in the commercial manufacture, use or sale of a generic version of LYBALVI (olanzapine and samidorphan tablets, 5mg/10mg, 10mg/10mg, 15mg/10mg and 20mg/10mg) in the U.S. prior to the expiration of certain of the Company’s U.S. patents. The notices alleged that certain of the Company’s patents related to LYBALVI are invalid, unenforceable and/or will not be infringed by the commercial manufacture, use or sale of the proposed generic products. The Company intends to vigorously defend its intellectual property. The filing of each lawsuit within 45 days of receipt of each of the respective notices triggered stays of FDA approval of each of the respective ANDAs for up to 30 months in accordance with the U.S. Drug Price Competition and Patent Term Restoration Act of 1984 (the “Hatch-Waxman Act”). Antitrust Class Action Litigation In October 2025, Value Drug Company filed a complaint asserting antitrust claims against Alkermes, Inc. and APIL in the U.S. District Court for the District of Massachusetts (the “MA District Court”). The complaint was filed on behalf of a putative class of direct purchasers of VIVITROL and alleges that the Company’s U.S. Patent No. 7,919,499 related to VIVITROL was fraudulently obtained, improperly listed in the Orange Book, and wrongfully enforced, resulting in delayed market entry for generic forms of VIVITROL. The lawsuit seeks, among other things, unspecified money damages plus interest, reasonable attorneys’ fees and other costs. The Company intends to vigorously defend itself in this matter. In December 2025, Alkermes, Inc. and APIL filed a motion to dismiss the complaint with the MA District Court. Government Matters The Company has received a civil investigative demand from a U.S. state governmental authority. The Company is cooperating with the investigation. Other Legal Proceedings The Company is involved in litigation and other legal proceedings incidental to its normal business activities. The Company intends to vigorously defend itself in these matters. In addition, in January 2023, Acorda Therapeutics, Inc. (“Acorda”) filed a petition with the U.S. District Court for the Southern District of New York (the “NY Southern District Court”) asking the court to confirm in part and modify in part the final arbitral award rendered by an arbitration panel in October 2022 and, as part of the requested modification, seeking an additional approximately $66.0 million in damages. In August 2023, the NY Southern District Court confirmed the final arbitral award and declined to modify the final award to increase the damages awarded thereunder. In September 2023, Acorda filed a notice of appeal of the NY Southern District Court decision to the U.S. Court of Appeals for the Federal Circuit (the “Federal Circuit Court”). In July 2025, the Federal Circuit Court transferred the appeal due to lack of jurisdiction to the U.S. Court of Appeals for the Second Circuit (the “Second Circuit”). On July 15, 2026, the Second Circuit affirmed the NY Southern District Court’s decision in favor of Alkermes.

Commitments and Contingent Liabilities

6 Months Ended

Jun. 30, 2026

Commitments and Contingencies Disclosure [Abstract]

18. COMMITMENTS AND CONTINGENT LIABILITIES

Contingent Consideration

At June 30, 2026, the Company’s contingent consideration related to the CVR Milestone issued as part of consideration for the Avadel Acquisition. Holders of Avadel Shares as of the Closing Date are entitled to receive a potential aggregate cash payment of $165.7 million, or $1.50 per Avadel Share, upon achievement of the CVR Milestone. For additional information related to the contingent consideration, see Note 3, Business Combination, and for information related to the change in the fair value of the contingent consideration, see Note 6, Fair Value in these “Notes to Condensed Consolidated Financial Statements”.

Litigation

From time to time, the Company may be subject to legal proceedings and claims in the ordinary course of business. On a quarterly basis, the Company reviews the status of each significant matter and assesses its potential financial exposure. If the potential loss from any claim, asserted or unasserted, or legal proceeding is considered probable and the amount can be reasonably estimated, the Company would accrue a liability for the estimated loss. Because of uncertainties related to claims and litigation, accruals are based on the Company’s best estimates, utilizing all available information. On a periodic basis, as additional information becomes available, or based on specific events such as the outcome of litigation or settlement of claims, the Company may reassess the potential liability related to these matters and may revise these estimates, which could result in material adverse adjustments to the Company’s operating results. At June 30, 2026, there were no potential material losses from claims, asserted or unasserted, or legal proceedings that the Company determined were probable of occurring. For claims that are reasonably possible, no estimable loss or range of loss can be made.

LYBALVI ANDA Litigation

In August 2025, Alkermes Pharma Ireland Limited (“APIL”) and Alkermes, Inc., two wholly-owned subsidiaries of the Company, filed a patent infringement lawsuit against Teva (as defined herein) in the U.S. District Court for the District of New Jersey (the “NJ District Court”) and a patent infringement lawsuit against Apotex in each of the NJ District Court and the U.S. District Court for the District of Delaware (the “DE District Court”). In September 2025, APIL and Alkermes, Inc. filed a patent infringement lawsuit against MSN (as defined herein) in the NJ District Court. On June 18, 2026, APIL and Alkermes, Inc. filed an additional patent infringement lawsuit against Apotex in the NJ District Court, which was consolidated on July 23, 2026 with the previously filed lawsuit in the NJ District Court. As used herein, Teva refers to Teva Pharmaceuticals, Inc., Apotex refers to Apotex Inc. and Apotex Corp., and MSN refers to MSN Laboratories Private Limited (“MSN Labs”), MSN Pharmaceuticals, Inc. and Novadoz Pharmaceuticals LLC. These lawsuits were filed following receipt of “paragraph IV certification” notices from each of Teva, Apotex and MSN Labs regarding their respective filings of an abbreviated new drug application (“ANDA”) with the U.S. Food and Drug Administration (“FDA”) seeking approval to engage in the commercial manufacture, use or sale of a generic version of LYBALVI (olanzapine and samidorphan tablets, 5mg/10mg, 10mg/10mg, 15mg/10mg and 20mg/10mg) in the U.S. prior to the expiration of certain of the Company’s U.S. patents. The notices alleged that certain of the Company’s patents related to LYBALVI are invalid, unenforceable and/or will not be infringed by the commercial manufacture, use or sale of the proposed generic products. The Company intends to vigorously defend its intellectual property. The filing of each lawsuit within 45 days of receipt of each of the respective notices triggered stays of FDA approval of each of the respective ANDAs for up to 30 months in accordance with the U.S. Drug Price Competition and Patent Term Restoration Act of 1984 (the “Hatch-Waxman Act”).

Antitrust Class Action Litigation

In October 2025, Value Drug Company filed a complaint asserting antitrust claims against Alkermes, Inc. and APIL in the U.S. District Court for the District of Massachusetts (the “MA District Court”). The complaint was filed on behalf of a putative class of direct purchasers of VIVITROL and alleges that the Company’s U.S. Patent No. 7,919,499 related to VIVITROL was fraudulently obtained, improperly listed in the Orange Book, and wrongfully enforced, resulting in delayed market entry for generic forms of VIVITROL. The lawsuit seeks, among other things, unspecified money damages plus interest, reasonable attorneys’ fees and other costs. The Company intends to vigorously defend itself in this matter. In December 2025, Alkermes, Inc. and APIL filed a motion to dismiss the complaint with the MA District Court.

Government Matters

The Company has received a civil investigative demand from a U.S. state governmental authority. The Company is cooperating with the investigation.

Other Legal Proceedings

The Company is involved in litigation and other legal proceedings incidental to its normal business activities. The Company intends to vigorously defend itself in these matters.

In addition, in January 2023, Acorda Therapeutics, Inc. (“Acorda”) filed a petition with the U.S. District Court for the Southern District of New York (the “NY Southern District Court”) asking the court to confirm in part and modify in part the final arbitral award rendered by an arbitration panel in October 2022 and, as part of the requested modification, seeking an additional approximately $66.0 million in damages. In August 2023, the NY Southern District Court confirmed the final arbitral award and declined to modify the final award to increase the damages awarded thereunder. In September 2023, Acorda filed a notice of appeal of the NY Southern District Court decision to the U.S. Court of Appeals for the Federal Circuit (the “Federal Circuit Court”). In July 2025, the Federal Circuit Court transferred the appeal due to lack of jurisdiction to the U.S. Court of Appeals for the Second Circuit (the “Second Circuit”). On July 15, 2026, the Second Circuit affirmed the NY Southern District Court’s decision in favor of Alkermes.