INSMED Inc
INSM- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001104506
In the last 90 days, INSMED Inc insiders filed 0 open-market purchases and 7 sales; 667 institutions reported holding it in 13F filings for Q2 2026, worth $23.8B in total; superinvestors Maverick Capital and Duquesne Family Office hold it.
13F holders, Q1 2026
Institutional positions in INSMED Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 675
- +8 vs. Q4 2025
- Shares held
- 220.9M
- +27.6M (+14.3%) vs. Q4 2025
- Total value
- $35.7B
- +$2.06B (+6.1%) vs. Q4 2025
- New holders
- 101
- 288 more added
- Sold out
- 93
- 216 more reduced
11 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting INSM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 667 | $23.8B |
| Q1 2026 | 675 | $35.7B |
| Q4 2025 | 678 | $37.8B |
| Q3 2025 | 566 | $30.3B |
| Q2 2025 | 516 | $21.2B |
| Q1 2025 | 442 | $15.3B |
| Q4 2024 | 439 | $13.3B |
| Q3 2024 | 414 | $13.7B |
| Q2 2024 | 378 | $11.7B |
| Q1 2024 | 288 | $4.07B |
| Q4 2023 | 271 | $4.64B |
| Q3 2023 | 252 | $3.72B |
| Q2 2023 | 223 | $3.09B |
| Q1 2023 | 230 | $2.48B |
| Q4 2022 | 225 | $2.87B |
| Q3 2022 | 238 | $2.74B |
| Q2 2022 | 214 | $2.55B |
| Q1 2022 | 224 | $2.97B |
| Q4 2021 | 214 | $3.36B |
| Q3 2021 | 193 | $3.40B |
| Q2 2021 | 203 | $3.46B |
| Q1 2021 | 199 | $3.63B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding INSMED Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Dimensional Fund Advisors LP | 400,900 | $65.5M | 0.01% | +1,827+0.5% | Added |
| Candriam Luxembourg S.C.A. | 401,735 | $65.7M | 0.34% | +693+0.2% | Added |
| Palo Alto Investors LP | 415,269 | $67.9M | 10.39% | −74,213−15.2% | Reduced |
| Samlyn Capital, LLC | 417,205 | $68.2M | 1.17% | +47,630+12.9% | Added |
| Janus Henderson Group PLC | 419,304 | $68.6M | 0.03% | −381,251−47.6% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 467,753 | $76.5M | 0.09% | +139,425+42.5% | Added |
| Frontier Capital Management Co LLC | 469,561 | $76.8M | 0.79% | +184,717+64.8% | Added |
| Affinity Asset Advisors, LLC | 480,000 | $78.5M | 4.60% | +30,000+6.7% | Added |
| Ensign Peak Advisors, Inc | 499,756 | $81.7M | 0.15% | +117,554+30.8% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 501,282 | $82.0M | 0.05% | +65,840+15.1% | Added |
| Royal Bank of Canada | 523,101 | $85.5M | 0.02% | +16,290+3.2% | Added |
| Nuveen, LLC | 534,750 | $87.4M | 0.02% | −115,654−17.8% | Reduced |
| Federated Hermes, Inc. | 538,257 | $88.0M | 0.14% | −94,041−14.9% | Reduced |
| Eventide Asset Management, LLC | 546,310 | $89.3M | 1.48% | +62,721+13.0% | Added |
| Deutsche Bank AG | 562,474 | $92.0M | 0.03% | −27,556−4.7% | Reduced |
| TimesSquare Capital Management, LLC | 584,798 | $95.6M | 1.62% | +94,292+19.2% | Added |
| Wells Fargo & Company | 597,384 | $97.7M | 0.02% | +10,733+1.8% | Added |
| BNP Paribas Arbitrage, SA | 604,600 | $98.9M | 0.07% | −310,819−34.0% | Reduced |
| Jennison Associates LLC | 604,694 | $98.9M | 0.07% | +42,398+7.5% | Added |
| GW&K Investment Management, LLC | 623,048 | $101.9M | 0.90% | +140,378+29.1% | Added |
| Swiss National Bank | 625,912 | $102.3M | 0.06% | +46,800+8.1% | Added |
| Artia Global Partners LP | 628,712 | $102.8M | 23.18% | −53,500−7.8% | Reduced |
| Clearbridge Investments, LLC | 643,435 | $105.2M | 0.09% | −175,576−21.4% | Reduced |
| Summit Partners Public Asset Management, LLC | 653,445 | $106.9M | 4.94% | −255,635−28.1% | Reduced |
| AQR Capital Management LLC | 675,485 | $108.8M | 0.05% | +207,225+44.3% | Added |
| Hood River Capital Management LLC | 688,554 | $112.6M | 1.13% | +50,977+8.0% | Added |
| Alliancebernstein L.P. | 688,734 | $119.9M | 0.04% | +46,015+7.2% | Added |
| Raymond James Financial Inc | 775,148 | $121.4M | 0.04% | −4,106−0.5% | Reduced |
| Legal & General Group Plc | 787,079 | $128.7M | 0.03% | +246,766+45.7% | Added |
| Amundi | 804,977 | $131.6M | 0.04% | −112,021−12.2% | Reduced |
| FIL Ltd | 828,947 | $135.5M | 0.11% | −9,562−1.1% | Reduced |
| Adage Capital Partners GP, L.L.C. | 900,000 | $147.2M | 0.23% | +600,000+200.0% | Added |
| William Blair Investment Management, LLC | 902,666 | $147.6M | 0.49% | −318,430−26.1% | Reduced |
| Principal Financial Group Inc | 916,464 | $149.9M | 0.08% | +145,106+18.8% | Added |
| American Century Companies Inc | 925,799 | $151.4M | 0.08% | +740,709+400.2% | Added |
| Goldman Sachs Group Inc | 942,646 | $154.1M | 0.02% | −302,267−24.3% | Reduced |
| Nwi Management LP | 1,014,000 | $165.8M | 10.14% | +25,540+2.6% | Added |
| Fiera Capital Corp | 1,021,970 | $167.1M | 0.57% | +29,078+2.9% | Added |
| Charles Schwab Investment Management Inc | 1,069,390 | $174.9M | 0.03% | +42,035+4.1% | Added |
| Pictet Asset Management Holding SA | 1,102,248 | $178.7M | 0.19% | +143,285+14.9% | Added |
| Nomura Asset Management International Inc. | 1,143,739 | $187.0M | 0.32% | −39,290−3.3% | Reduced |
| Duquesne Family Office LLCSuperinvestorDuquesne Family Office | 1,154,090 | $188.7M | 6.43% | −327,662−22.1% | Reduced |
| Millennium Management LLC | 1,157,786 | $189.3M | 0.14% | −153,868−11.7% | Reduced |
| UBS Asset Management Americas Inc | 1,215,025 | $198.7M | 0.04% | +271,719+28.8% | Added |
| Paradigm Biocapital Advisors LP | 1,254,488 | $205.1M | 4.19% | +1,254,488 | New |
| Bank of New York Mellon Corp | 1,262,749 | $206.5M | 0.04% | −127,293−9.2% | Reduced |
| Castle Hook Partners LP | 1,269,754 | $207.6M | 4.20% | +16,186+1.3% | Added |
| Northern Trust Corp | 1,294,000 | $211.6M | 0.03% | +55,562+4.5% | Added |
| Morgan Stanley | 1,331,542 | $217.7M | 0.01% | −300,364−18.4% | Reduced |
| Vanguard Fiduciary Trust Co | 1,354,516 | $221.5M | 0.06% | +1,354,516 | New |
| Capital World Investors | 1,362,291 | $222.7M | 0.03% | +1,362,291 | New |
| SEI Investments Co | 1,395,794 | $228.2M | 0.21% | +505,624+56.8% | Added |
| Westfield Capital Management Co LP | 1,468,459 | $240.1M | 1.01% | +1,035,938+239.5% | Added |
| Integral Health Asset Management, LLC | 1,500,000 | $245.3M | 12.98% | +250,000+20.0% | Added |
| Bank of America Corp | 1,502,281 | $245.7M | 0.02% | −223,400−12.9% | Reduced |
| UBS Group AG | 1,737,481 | $284.1M | 0.05% | −130,154−7.0% | Reduced |
| Orbis Allan Gray Ltd | 1,872,824 | $306.2M | 1.29% | −2,307,133−55.2% | Reduced |
| Citadel Advisors LLC | 2,182,571 | $356.9M | 0.25% | +1,025,276+88.6% | Added |
| Franklin Resources Inc | 2,617,251 | $428.0M | 0.10% | −138,285−5.0% | Reduced |
| Ameriprise Financial Inc | 3,057,718 | $500.0M | 0.12% | +1,088,861+55.3% | Added |
| Price T Rowe Associates Inc | 3,092,807 | $505.7M | 0.06% | −946,659−23.4% | Reduced |
| Geode Capital Management, LLC | 4,450,389 | $733.3M | 0.05% | +151,337+3.5% | Added |
| RTW Investments, LP | 4,842,880 | $791.9M | 7.88% | +10.0% | Added |
| State Street Corp | 5,551,699 | $907.8M | 0.03% | +349,955+6.7% | Added |
| Capital International Investors | 5,595,194 | $914.9M | 0.21% | +443,523+8.6% | Added |
| D. E. Shaw & Co., Inc. | 5,625,825 | $919.9M | 0.72% | +1,274,830+29.3% | Added |
| Invesco Ltd. | 6,512,889 | $1.06B | 0.10% | −1,005,449−13.4% | Reduced |
| Artisan Partners Limited Partnership | 6,527,301 | $1.07B | 1.74% | +1,683,552+34.8% | Added |
| Baker Bros. Advisors LP | 7,421,111 | $1.21B | 6.97% | +828,365+12.6% | Added |
| Vanguard Capital Management LLC | 9,642,131 | $1.58B | 0.04% | +9,642,131 | New |
| Vanguard Portfolio Management LLC | 10,371,802 | $1.70B | 0.09% | +10,371,802 | New |
| FMR LLC | 13,160,167 | $2.15B | 0.11% | +3,232,231+32.6% | Added |
| Darwin Global Management, Ltd. | 16,805,184 | $2.58B | 68.33% | −4,128,093−19.7% | Reduced |
| BlackRock, Inc. | 16,678,146 | $2.73B | 0.05% | +1,613,094+10.7% | Added |
| JPMorgan Chase & Co | 24,150,499 | $3.70B | 0.25% | +950,987+4.1% | Added |
| Holocene Advisors, LP | 0 | $0 | 0.00% | −801,165−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −395,000−100.0% | Sold out |
| Zurich Insurance Group Ltd | 0 | $0 | 0.00% | −281,098−100.0% | Sold out |
| Alberta Investment Management Corp | 0 | $0 | 0.00% | −206,532−100.0% | Sold out |
| Novo Holdings A/S | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −130,000−100.0% | Sold out |
| Suvretta Capital Management, LLC | 0 | $0 | 0.00% | −109,313−100.0% | Sold out |
| Skandinaviska Enskilda Banken AB (publ) | 0 | $0 | 0.00% | −96,353−100.0% | Sold out |
| Atika Capital Management LLC | 0 | $0 | 0.00% | −77,200−100.0% | Sold out |
| Royce & Associates LP | 0 | $0 | 0.00% | −59,705−100.0% | Sold out |
| Picton Mahoney Asset Management | 0 | $0 | 0.00% | −57,259−100.0% | Sold out |
| Monashee Investment Management LLC | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −44,009−100.0% | Sold out |
| Freestone Grove Partners LP | 0 | $0 | 0.00% | −36,200−100.0% | Sold out |
| Acuta Capital Partners, LLC | 0 | $0 | 0.00% | −25,878−100.0% | Sold out |
| OrbiMed Advisors LLC | 0 | $0 | 0.00% | −25,400−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −21,910−100.0% | Sold out |
| Avidity Partners Management LP | 0 | $0 | 0.00% | −17,700−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −16,043−100.0% | Sold out |
| West Michigan Advisors, LLC | 0 | $0 | 0.00% | −15,418−100.0% | Sold out |
| Main Management ETF Advisors, LLC | 0 | $0 | 0.00% | −13,311−100.0% | Sold out |
| Fedenia Advisers LLC | 0 | $0 | 0.00% | −12,927−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −12,924−100.0% | Sold out |
| October Effect Ltd | 0 | $0 | 0.00% | −12,121−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −10,922−100.0% | Sold out |