Form 4 Filing for Alkermes plc.

This filing details several transactions by Samuel Joseph Parisi, VP of Finance (Interim PAO) of Alkermes plc. On May 29, 2026, Mr. Parisi acquired 3,392 ordinary shares at $20.03 per share and an additional 12,825 ordinary shares at $19.34 per share. Concurrently, he disposed of 16,217 ordinary shares. The shares were sold in multiple transactions at prices ranging from $42.245 to $42.50, with the weighted average price reported as $42.3634. The filing also notes the exercise and disposal of employee stock options: 3,392 options were exercised, and 12,825 options were exercised. Following these transactions, Mr. Parisi holds 7,717 ordinary shares directly.