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 |
|---|---|---|---|---|---|
| JPMorgan Chase & Co | 24,150,499 | $3.70B | 0.25% | +950,987+4.1% | Added |
| BlackRock, Inc. | 16,678,146 | $2.73B | 0.05% | +1,613,094+10.7% | Added |
| Darwin Global Management, Ltd. | 16,805,184 | $2.58B | 68.33% | −4,128,093−19.7% | Reduced |
| FMR LLC | 13,160,167 | $2.15B | 0.11% | +3,232,231+32.6% | Added |
| Vanguard Portfolio Management LLC | 10,371,802 | $1.70B | 0.09% | +10,371,802 | New |
| Vanguard Capital Management LLC | 9,642,131 | $1.58B | 0.04% | +9,642,131 | New |
| Baker Bros. Advisors LP | 7,421,111 | $1.21B | 6.97% | +828,365+12.6% | Added |
| Artisan Partners Limited Partnership | 6,527,301 | $1.07B | 1.74% | +1,683,552+34.8% | Added |
| Invesco Ltd. | 6,512,889 | $1.06B | 0.10% | −1,005,449−13.4% | Reduced |
| D. E. Shaw & Co., Inc. | 5,625,825 | $919.9M | 0.72% | +1,274,830+29.3% | Added |
| Capital International Investors | 5,595,194 | $914.9M | 0.21% | +443,523+8.6% | Added |
| State Street Corp | 5,551,699 | $907.8M | 0.03% | +349,955+6.7% | Added |
| RTW Investments, LP | 4,842,880 | $791.9M | 7.88% | +10.0% | Added |
| Geode Capital Management, LLC | 4,450,389 | $733.3M | 0.05% | +151,337+3.5% | Added |
| Price T Rowe Associates Inc | 3,092,807 | $505.7M | 0.06% | −946,659−23.4% | Reduced |
| Ameriprise Financial Inc | 3,057,718 | $500.0M | 0.12% | +1,088,861+55.3% | Added |
| Franklin Resources Inc | 2,617,251 | $428.0M | 0.10% | −138,285−5.0% | Reduced |
| Citadel Advisors LLC | 2,182,571 | $356.9M | 0.25% | +1,025,276+88.6% | Added |
| Orbis Allan Gray Ltd | 1,872,824 | $306.2M | 1.29% | −2,307,133−55.2% | Reduced |
| UBS Group AG | 1,737,481 | $284.1M | 0.05% | −130,154−7.0% | Reduced |
| Bank of America Corp | 1,502,281 | $245.7M | 0.02% | −223,400−12.9% | Reduced |
| Integral Health Asset Management, LLC | 1,500,000 | $245.3M | 12.98% | +250,000+20.0% | Added |
| Westfield Capital Management Co LP | 1,468,459 | $240.1M | 1.01% | +1,035,938+239.5% | Added |
| SEI Investments Co | 1,395,794 | $228.2M | 0.21% | +505,624+56.8% | Added |
| Capital World Investors | 1,362,291 | $222.7M | 0.03% | +1,362,291 | New |
| Vanguard Fiduciary Trust Co | 1,354,516 | $221.5M | 0.06% | +1,354,516 | New |
| Morgan Stanley | 1,331,542 | $217.7M | 0.01% | −300,364−18.4% | Reduced |
| Northern Trust Corp | 1,294,000 | $211.6M | 0.03% | +55,562+4.5% | Added |
| Castle Hook Partners LP | 1,269,754 | $207.6M | 4.20% | +16,186+1.3% | Added |
| Bank of New York Mellon Corp | 1,262,749 | $206.5M | 0.04% | −127,293−9.2% | Reduced |
| Paradigm Biocapital Advisors LP | 1,254,488 | $205.1M | 4.19% | +1,254,488 | New |
| UBS Asset Management Americas Inc | 1,215,025 | $198.7M | 0.04% | +271,719+28.8% | Added |
| Millennium Management LLC | 1,157,786 | $189.3M | 0.14% | −153,868−11.7% | Reduced |
| Duquesne Family Office LLCSuperinvestorDuquesne Family Office | 1,154,090 | $188.7M | 6.43% | −327,662−22.1% | Reduced |
| Nomura Asset Management International Inc. | 1,143,739 | $187.0M | 0.32% | −39,290−3.3% | Reduced |
| Pictet Asset Management Holding SA | 1,102,248 | $178.7M | 0.19% | +143,285+14.9% | Added |
| Charles Schwab Investment Management Inc | 1,069,390 | $174.9M | 0.03% | +42,035+4.1% | Added |
| Fiera Capital Corp | 1,021,970 | $167.1M | 0.57% | +29,078+2.9% | Added |
| Nwi Management LP | 1,014,000 | $165.8M | 10.14% | +25,540+2.6% | Added |
| Goldman Sachs Group Inc | 942,646 | $154.1M | 0.02% | −302,267−24.3% | Reduced |
| American Century Companies Inc | 925,799 | $151.4M | 0.08% | +740,709+400.2% | Added |
| Principal Financial Group Inc | 916,464 | $149.9M | 0.08% | +145,106+18.8% | Added |
| William Blair Investment Management, LLC | 902,666 | $147.6M | 0.49% | −318,430−26.1% | Reduced |
| Adage Capital Partners GP, L.L.C. | 900,000 | $147.2M | 0.23% | +600,000+200.0% | Added |
| FIL Ltd | 828,947 | $135.5M | 0.11% | −9,562−1.1% | Reduced |
| Amundi | 804,977 | $131.6M | 0.04% | −112,021−12.2% | Reduced |
| Legal & General Group Plc | 787,079 | $128.7M | 0.03% | +246,766+45.7% | Added |
| Raymond James Financial Inc | 775,148 | $121.4M | 0.04% | −4,106−0.5% | Reduced |
| Alliancebernstein L.P. | 688,734 | $119.9M | 0.04% | +46,015+7.2% | Added |
| Hood River Capital Management LLC | 688,554 | $112.6M | 1.13% | +50,977+8.0% | Added |
| AQR Capital Management LLC | 675,485 | $108.8M | 0.05% | +207,225+44.3% | Added |
| Summit Partners Public Asset Management, LLC | 653,445 | $106.9M | 4.94% | −255,635−28.1% | Reduced |
| Clearbridge Investments, LLC | 643,435 | $105.2M | 0.09% | −175,576−21.4% | Reduced |
| Artia Global Partners LP | 628,712 | $102.8M | 23.18% | −53,500−7.8% | Reduced |
| Swiss National Bank | 625,912 | $102.3M | 0.06% | +46,800+8.1% | Added |
| GW&K Investment Management, LLC | 623,048 | $101.9M | 0.90% | +140,378+29.1% | Added |
| Jennison Associates LLC | 604,694 | $98.9M | 0.07% | +42,398+7.5% | Added |
| BNP Paribas Arbitrage, SA | 604,600 | $98.9M | 0.07% | −310,819−34.0% | Reduced |
| Wells Fargo & Company | 597,384 | $97.7M | 0.02% | +10,733+1.8% | Added |
| TimesSquare Capital Management, LLC | 584,798 | $95.6M | 1.62% | +94,292+19.2% | Added |
| Deutsche Bank AG | 562,474 | $92.0M | 0.03% | −27,556−4.7% | Reduced |
| Eventide Asset Management, LLC | 546,310 | $89.3M | 1.48% | +62,721+13.0% | Added |
| Federated Hermes, Inc. | 538,257 | $88.0M | 0.14% | −94,041−14.9% | Reduced |
| Nuveen, LLC | 534,750 | $87.4M | 0.02% | −115,654−17.8% | Reduced |
| Royal Bank of Canada | 523,101 | $85.5M | 0.02% | +16,290+3.2% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 501,282 | $82.0M | 0.05% | +65,840+15.1% | Added |
| Ensign Peak Advisors, Inc | 499,756 | $81.7M | 0.15% | +117,554+30.8% | Added |
| Affinity Asset Advisors, LLC | 480,000 | $78.5M | 4.60% | +30,000+6.7% | Added |
| Frontier Capital Management Co LLC | 469,561 | $76.8M | 0.79% | +184,717+64.8% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 467,753 | $76.5M | 0.09% | +139,425+42.5% | Added |
| Janus Henderson Group PLC | 419,304 | $68.6M | 0.03% | −381,251−47.6% | Reduced |
| Samlyn Capital, LLC | 417,205 | $68.2M | 1.17% | +47,630+12.9% | Added |
| Palo Alto Investors LP | 415,269 | $67.9M | 10.39% | −74,213−15.2% | Reduced |
| Candriam Luxembourg S.C.A. | 401,735 | $65.7M | 0.34% | +693+0.2% | Added |
| Dimensional Fund Advisors LP | 400,900 | $65.5M | 0.01% | +1,827+0.5% | Added |
| Wellington Management Group LLP | 399,044 | $65.3M | 0.01% | −87,094−17.9% | Reduced |
| Lord, Abbett & Co. LLC | 397,261 | $65.0M | 0.21% | −323,637−44.9% | Reduced |
| Victory Capital Management Inc | 396,245 | $64.8M | 0.04% | −250,469−38.7% | Reduced |
| Polar Capital Holdings Plc | 368,107 | $60.2M | 0.26% | +23,879+6.9% | Added |
| Gateway Investment Advisers LLC | 365,000 | $59.7M | 0.67% | 00.0% | Unchanged |
| Vanguard Asset Management, Ltd | 360,075 | $58.9M | 0.05% | +360,075 | New |
| Sofinnova Investments, Inc. | 346,075 | $56.6M | 2.84% | +189,274+120.7% | Added |
| California Public Employees Retirement System | 344,612 | $56.4M | 0.03% | −10,297−2.9% | Reduced |
| Rock Springs Capital Management LP | 314,300 | $51.4M | 3.03% | −4,950−1.6% | Reduced |
| Marshall Wace, LLP | 312,565 | $51.1M | 0.05% | −77,316−19.8% | Reduced |
| National Pension Service | 311,881 | $51.0M | 0.04% | +31,439+11.2% | Added |
| California State Teachers Retirement System | 303,182 | $49.6M | 0.05% | −7,148−2.3% | Reduced |
| Nearwater Capital Markets, Ltd | 300,000 | $49.1M | 1.16% | −200,000−40.0% | Reduced |
| Envestnet Asset Management Inc | 299,925 | $49.0M | 0.01% | +23,820+8.6% | Added |
| Bridgewater Associates, LP | 295,579 | $48.3M | 0.22% | +295,579 | New |
| New York State Common Retirement Fund | 293,546 | $48.0M | 0.07% | +17,262+6.2% | Added |
| Allspring Global Investments Holdings, LLC | 282,734 | $46.6M | 0.08% | +62,650+28.5% | Added |
| ProShare Advisors LLC | 283,141 | $46.3M | 0.07% | −57,599−16.9% | Reduced |
| Standard Life Aberdeen plc | 277,016 | $45.3M | 0.07% | +23,904+9.4% | Added |
| Barclays PLC | 275,731 | $45.1M | 0.02% | −168,975−38.0% | Reduced |
| Rhumbline Advisers | 272,615 | $44.6M | 0.04% | +4,289+1.6% | Added |
| Neuberger Berman Group LLC | 270,700 | $44.3M | 0.03% | +62,831+30.2% | Added |
| Tang Capital Management LLC | 260,000 | $42.5M | 2.16% | +200,000+333.3% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 255,247 | $41.7M | 0.03% | +32,981+14.8% | Added |
| First Turn Management, LLC | 248,475 | $40.6M | 4.54% | −15,818−6.0% | Reduced |