FORM 8.1(a) & (b) (Opening Position Disclosure)

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DUBLIN , Nov. 5, 2025 /PRNewswire/ -- Alkermes plc (Nasdaq: ALKS): IRISH TAKEOVER PANEL OPENING POSITION DISCLOSURE UNDER RULE 8.1(a) AND (b) OF THE IRISH TAKEOVER PANEL ACT, 1997, TAKEOVER RULES, 2022 BY AN OFFEROR OR AN OFFEREE 1. KEY INFORMATION 2. INTERESTS AND SHORT POSITIONS If there are interests and positions to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2 for each additional class of relevant security. Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates (Note 1) N/A All interests and all short positions should be disclosed. Details of options including rights to subscribe for new securities and any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8. 3. INTERESTS AND SHORT POSITIONS OF PERSONS ACTING IN CONCERT WITH THE PARTY MAKING THE DISCLOSURE Ap11 4. OTHER INFORMATION (a) Indemnity and other dealing arrangements (b) Agreements, arrangements or understandings  relating to options or derivatives (c) Attachments Ap12 NOTES ON FORM 8.1(a) and (b)     View original content to download multimedia: https://www.prnewswire.com/news-releases/form-8-1a--b-opening-position-disclosure-302604930.html

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