INSM INSMED Inc: institutional ownership and insider trading
718 funds reported holding $28.8B of INSMED Inc in their latest 13F filings; in Q2 2026 funds net bought $1.06B, with 107 new positions and 120 funds selling out; over the last 12 months insiders bought $0 and sold $167M on the open market.
Famous investors holding INSM
- Stanley Druckenmiller (Duquesne Family Office): $296M, 5.7% of the portfolio
- Lee Ainslie (Maverick Capital): $229M, 2.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $633M, 0.3% of the portfolio
- Ray Dalio (Bridgewater Associates): $48.6M, 0.2% of the portfolio
- Izzy Englander (Millennium Management): $312M, 0.1% of the portfolio
- Two Sigma (Two Sigma Investments): $133M, 0.1% of the portfolio
- Ken Griffin (Citadel Advisors): $340M, 0.0% of the portfolio
Largest institutional holders of INSM
- VANGUARD GROUP INC — $3.67B
- FMR LLC — $1.72B
- BlackRock, Inc. (BLK) — $1.69B
- VANGUARD PORTFOLIO MANAGEMENT LLC — $1.11B
- JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) — $1.09B
- VANGUARD CAPITAL MANAGEMENT LLC — $1.04B
- BAKER BROS. ADVISORS LP — $938M
- Capital International Investors — $878M
- Darwin Global Management, Ltd. — $674M
- AMERIPRISE FINANCIAL INC (AMP) — $659M
Recent INSM insider trades
- Sep 9, 2026: Brennan David R sold 25,000 shares ($3.10M)
- Aug 17, 2026: Sharoky Melvin Md sold 5,000 shares ($638K)
- Aug 10, 2026: Adsett Roger sold 239,850 shares ($32.0M)
- Aug 6, 2026: Flammer Martina M.D. sold 27,173 shares ($3.49M)
Members of Congress trading INSM
- Jun 10, 2026: Josh Gottheimer sold part of $1.00K–$15.0K
- Oct 3, 2025: Gilbert Ray Cisneros, Jr. sold $1.00K–$15.0K
- Sep 22, 2025: Gilbert Ray Cisneros, Jr. sold part of $1.00K–$15.0K
- Aug 8, 2025: Gilbert Ray Cisneros, Jr. sold part of $1.00K–$15.0K
- Jul 7, 2025: Gilbert Ray Cisneros, Jr. sold part of $1.00K–$15.0K
- Jun 16, 2025: Josh Gottheimer bought $1.00K–$15.0K
- Apr 9, 2025: Josh Gottheimer sold part of $1.00K–$15.0K
- Jun 21, 2024: Josh Gottheimer sold part of $1.00K–$15.0K
- May 28, 2024: Josh Gottheimer sold part of $1.00K–$15.0K
5%+ owners
- FMR LLC: 7.4% (Schedule 13G/A, filed Aug 6, 2026)
- Vanguard Capital Management: 5.3% (Schedule 13G, filed Apr 30, 2026)