Who owns INSMED Inc?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of INSM from SEC Form 13F filings across 665 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 665 institutions disclosed 223.7M shares of INSMED Inc worth $23.85B — about 102.9% of shares outstanding; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
665
13F holders
$23.85B
value, 2026 filers
102.9%
of shares outstanding (223.7M sh)
126
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of INSM's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 16.1M | $1.72B | 0.1% | 7.4% | +22.7% |
| 2 | BlackRock, Inc. | 15.8M | $1.69B | 0.0% | 7.3% | -5.2% |
| 3 | JPMORGAN CHASE & CO | 10.4M | $1.09B | 0.1% | 4.8% | -56.8% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 10.4M | $1.11B | 0.1% | 4.8% | +0.3% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 9.8M | $1.04B | 0.0% | 4.5% | +1.5% |
| 6 | BAKER BROS. ADVISORS LP | 8.8M | $937.8M | 4.7% | 4% | +18.5% |
| 7 | Capital International Investors | 8.2M | $878.3M | 0.2% | 3.8% | +47.2% |
| 8 | Darwin Global Management, Ltd. | 6.4M | $673.6M | 17.9% | 3% | -61.7% |
| 9 | AMERIPRISE FINANCIAL INC | 6.2M | $658.9M | 0.1% | 2.8% | +102.1% |
| 10 | Orbis Allan Gray Ltd | 6.1M | $647.9M | 2.2% | 2.8% | +224.5% |
| 11 | STATE STREET CORP | 6.1M | $645.3M | 0.0% | 2.8% | +9.0% |
| 12 | D. E. Shaw & Co., Inc. | 5.9M | $626.7M | 0.3% | 2.7% | +4.5% |
| 13 | Artisan Partners Limited Partnership | 5.4M | $580.2M | 0.9% | 2.5% | -16.6% |
| 14 | RTW INVESTMENTS, LP | 4.8M | $516.3M | 4.4% | 2.2% | 0.0% |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 4.2M | $448.8M | 0.0% | 1.9% | -5.2% |
| 16 | PRICE T ROWE ASSOCIATES INC /MD/ | 3.4M | $363.1M | 0.0% | 1.6% | +10.1% |
| 17 | NORGES BANKNEW | 3.4M | $360.1M | 0.0% | 1.6% | new |
| 18 | Jupiter Topco LLCNEW | 2.6M | $277.8M | 0.1% | 1.2% | new |
| 19 | UBS Group AG | 2.6M | $275.6M | 0.0% | 1.2% | +48.7% |
| 20 | CITADEL ADVISORS LLC | 2.6M | $272.6M | 0.0% | 1.2% | +17.2% |
| 21 | FRANKLIN RESOURCES INC | 2.3M | $242.4M | 0.1% | 1% | -13.1% |
| 22 | MAVERICK CAPITAL LTDNEW | 2.2M | $229.3M | 2.0% | 1% | new |
| 23 | MILLENNIUM MANAGEMENT LLC | 2.0M | $218.4M | 0.1% | 0.9% | +76.9% |
| 24 | Qube Research & Technologies Ltd | 1.7M | $179.4M | 0.2% | 0.8% | +1032.8% |
| 25 | WESTFIELD CAPITAL MANAGEMENT CO LP | 1.6M | $173.7M | 0.6% | 0.7% | +11.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.