ALNY ALNYLAM PHARMACEUTICALS, INC.: institutional ownership and insider trading
839 funds reported holding $48.5B of ALNYLAM PHARMACEUTICALS, INC. in their latest 13F filings; in Q2 2026 funds net bought $1.51B, with 81 new positions and 80 funds selling out; over the last 12 months insiders bought $0 and sold $44.0M on the open market.
Famous investors holding ALNY
- Two Sigma (Two Sigma Investments): $565M, 0.4% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $462M, 0.2% of the portfolio
- Ray Dalio (Bridgewater Associates): $30.0M, 0.1% of the portfolio
- Izzy Englander (Millennium Management): $114M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $94.9M, 0.0% of the portfolio
Largest institutional holders of ALNY
- VANGUARD GROUP INC — $5.39B
- FMR LLC — $4.52B
- Capital World Investors — $3.35B
- BlackRock, Inc. (BLK) — $3.28B
- Capital Research Global Investors — $2.94B
- Banque Cantonale Vaudoise — $2.20B
- VANGUARD PORTFOLIO MANAGEMENT LLC — $1.97B
- VANGUARD CAPITAL MANAGEMENT LLC — $1.82B
- T. Rowe Price Investment Management, Inc. — $1.70B
- Invesco Ltd. (IVZ) — $1.13B
Recent ALNY insider trades
- Oct 2, 2026: Supran Bryan sold 1,758 shares ($399K)
- Jun 1, 2026: Pyott David E I sold 3,830 shares ($1.15M)
- Apr 6, 2026: McLaughlin Melissa sold 3,910 shares ($1.27M)
- Mar 5, 2026: Fitzgerald Kevin Joseph sold 1,291 shares ($418K)
Members of Congress trading ALNY
- May 12, 2025: Jefferson Shreve sold $15.0K–$50.0K
- Jan 29, 2024: Josh Gottheimer sold $1.00K–$15.0K
- Jan 11, 2024: Josh Gottheimer bought $1.00K–$15.0K
- Dec 11, 2023: Josh Gottheimer sold $1.00K–$15.0K
5%+ owners
- FMR LLC: 11.0% (Schedule 13G/A, filed May 6, 2026)
- Capital World Investors: 8.2% (Schedule 13G/A, filed May 14, 2026)
- Capital Research Global Investors: 7.1% (Schedule 13G/A, filed May 14, 2026)
- Vanguard Capital Management: 5.4% (Schedule 13G, filed Apr 29, 2026)