Officer Sale of Alkermes plc Ordinary Shares

David Joseph Gaffin, EVP, CLO of Alkermes, Inc., reported the sale of 2,034 ordinary shares on June 4, 2026. The shares were sold at a price of $43.05 per share, for a total transaction value of $87,574.70. This transaction was part of a Rule 10b5-1 trading plan adopted on November 19, 2025. Following the sale, Gaffin directly owns 229,524 ordinary shares. The filing is Form 4, indicating a change in beneficial ownership.