ALKS Alkermes plc.: institutional ownership and insider trading
446 funds reported holding $10.0B of Alkermes plc. in their latest 13F filings; in Q2 2026 funds net bought $144M, with 86 new positions and 52 funds selling out; over the last 12 months insiders bought $0 and sold $10.3M on the open market.
Famous investors holding ALKS
- Renaissance Technologies (Renaissance Technologies): $339M, 0.5% of the portfolio
- Two Sigma (Two Sigma Investments): $54.4M, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $68.7M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $99.1M, 0.0% of the portfolio
- Izzy Englander (Millennium Management): $18.1M, 0.0% of the portfolio
Largest institutional holders of ALKS
- BlackRock, Inc. (BLK) — $1.53B
- BAKER BROS. ADVISORS LP — $525M
- VANGUARD GROUP INC — $504M
- VANGUARD PORTFOLIO MANAGEMENT LLC — $497M
- STATE STREET CORP (STT, STT-PG) — $480M
- VANGUARD CAPITAL MANAGEMENT LLC — $394M
- PRICE T ROWE ASSOCIATES INC /MD/ — $353M
- RENAISSANCE TECHNOLOGIES LLC — $339M
- GEODE CAPITAL MANAGEMENT, LLC — $235M
- DIMENSIONAL FUND ADVISORS LP — $220M
Recent ALKS insider trades
- Oct 2, 2026: Gaffin David Joseph sold 2,034 shares ($83.5K)
- Sep 3, 2026: Gaffin David Joseph sold 2,034 shares ($97.7K)
- Sep 1, 2026: Hopkinson Craig C. sold 9,000 shares ($423K)
- Aug 17, 2026: Nichols Christian Todd sold 7,576 shares ($373K)
Members of Congress trading ALKS
- Sep 29, 2026: Gilbert Ray Cisneros, Jr. bought $1.00K–$15.0K
- Jul 30, 2026: Gilbert Ray Cisneros, Jr. bought $15.0K–$50.0K
5%+ owners
- Vanguard Portfolio Management: 5.8% (Schedule 13G, filed Apr 28, 2026)
- Vanguard Capital Management: 5.2% (Schedule 13G, filed Apr 28, 2026)