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 |
|---|---|---|---|---|---|
| Assenagon Asset Management S.A. | 63,259 | $10.3M | 0.02% | −43,567−40.8% | Reduced |
| Handelsbanken Fonder AB | 67,481 | $11.0M | 0.04% | +3,900+6.1% | Added |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 68,350 | $11.2M | 0.06% | +17,850+35.3% | Added |
| Lansforsakringar Fondforvaltning AB (publ) | 68,489 | $11.2M | 0.06% | +68,489 | New |
| Parnassus Investments | 69,515 | $11.4M | 0.03% | +17,872+34.6% | Added |
| Walleye Capital LLC | 71,819 | $11.7M | 0.07% | +55,999+354.0% | Added |
| Creative Planning | 72,200 | $11.8M | 0.01% | +1,698+2.4% | Added |
| Manufacturers Life Insurance Company, The | 72,696 | $11.9M | 0.01% | −46,151−38.8% | Reduced |
| State of New Jersey Common Pension Fund D | 72,888 | $11.9M | 0.05% | +759+1.1% | Added |
| Cinctive Capital Management LP | 73,063 | $11.9M | 0.79% | +55,118+307.1% | Added |
| KLP Kapitalforvaltning AS | 74,000 | $12.1M | 0.05% | 00.0% | Unchanged |
| Stifel Financial Corp | 75,702 | $12.4M | 0.01% | +6,464+9.3% | Added |
| Tredje AP-fonden | 76,604 | $12.5M | 0.07% | +76,604 | New |
| Andra AP-fonden | 77,970 | $12.7M | 0.16% | +41,670+114.8% | Added |
| Guggenheim Capital LLC | 80,021 | $13.1M | 0.10% | −2,270−2.8% | Reduced |
| Asset Management One Co.,Ltd. | 82,381 | $13.5M | 0.04% | +1,494+1.8% | Added |
| Swedbank AB | 82,865 | $13.6M | 0.01% | +23,313+39.1% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 84,184 | $13.8M | 0.03% | +1,152+1.4% | Added |
| Police & Firemen's Retirement System of New Jersey | 89,630 | $14.7M | 0.13% | +542+0.6% | Added |
| Treasurer of the State of North Carolina | 89,647 | $14.7M | 0.05% | +1,907+2.2% | Added |
| Nomura Asset Management Co Ltd | 89,660 | $14.7M | 0.04% | +6,116+7.3% | Added |
| Storebrand Asset Management AS | 90,826 | $14.9M | 0.04% | +70,199+340.3% | Added |
| EULAV Asset Management | 92,000 | $15.0M | 0.48% | +11,000+13.6% | Added |
| Mirae Asset Global Investments Co., Ltd. | 92,080 | $15.1M | 0.04% | +13,588+17.3% | Added |
| J. Safra Sarasin Holding AG | 93,181 | $15.2M | 0.26% | +86,720+1,342.2% | Added |
| M&G Plc | 98,221 | $16.1M | 0.08% | +98,221 | New |
| Van Eck Associates Corp | 104,290 | $17.1M | 0.01% | +15,255+17.1% | Added |
| National Bank of Canada | 104,758 | $17.1M | 0.02% | −3,948−3.6% | Reduced |
| Driehaus Capital Management LLC | 105,414 | $17.2M | 0.13% | −203−0.2% | Reduced |
| Vanguard Investments Australia, Ltd. | 105,805 | $17.3M | 0.05% | +105,805 | New |
| Vanguard Global Advisers, LLC | 109,003 | $17.8M | 0.01% | +109,003 | New |
| NEOS Investment Management LLC | 110,426 | $18.1M | 0.09% | +62,469+130.3% | Added |
| Danske Bank A/S | 111,058 | $18.2M | 0.04% | +800+0.7% | Added |
| State of Wisconsin Investment Board | 114,346 | $18.7M | 0.04% | −17,278−13.1% | Reduced |
| PFA Pension, Forsikringsaktieselskab | 114,788 | $18.8M | 0.06% | +66,458+137.5% | Added |
| Rafferty Asset Management, LLC | 116,069 | $19.0M | 0.08% | +15,257+15.1% | Added |
| HSBC Holdings PLC | 116,456 | $19.0M | 0.01% | −6,811−5.5% | Reduced |
| Schroder Investment Management Group | 119,958 | $19.6M | 0.02% | +52,569+78.0% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 120,348 | $19.7M | 0.03% | +17,040+16.5% | Added |
| Aviva PLC | 122,074 | $20.0M | 0.03% | +12,673+11.6% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 122,958 | $20.1M | 0.03% | +2,577+2.1% | Added |
| Fred Alger Management, LLC | 125,766 | $20.6M | 0.09% | +44,455+54.7% | Added |
| Man Group plc | 126,840 | $20.7M | 0.04% | +8,479+7.2% | Added |
| SG Americas Securities, LLC | 137,149 | $22.4M | 0.02% | +70,387+105.4% | Added |
| LPL Financial LLC | 138,281 | $22.6M | 0.01% | +5,497+4.1% | Added |
| Perpetual Ltd | 142,580 | $23.3M | 0.36% | +1,063+0.8% | Added |
| Long Focus Capital Management, LLC | 145,000 | $23.7M | 1.04% | +20,000+16.0% | Added |
| ExodusPoint Capital Management, LP | 148,133 | $24.2M | 0.24% | +68,046+85.0% | Added |
| Woodline Partners LP | 148,453 | $24.3M | 0.09% | +18,301+14.1% | Added |
| Qube Research & Technologies Ltd | 148,515 | $24.3M | 0.03% | +148,515 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 152,366 | $24.9M | 0.05% | −9,458−5.8% | Reduced |
| Patient Square Capital LP | 157,500 | $25.8M | 4.57% | −109,500−41.0% | Reduced |
| Engineers Gate Manager LP | 158,792 | $26.0M | 0.32% | +104,009+189.9% | Added |
| Rhenman & Partners Asset Management AB | 159,760 | $26.1M | 3.22% | +46,175+40.7% | Added |
| C WorldWide Group Holding A/S | 161,110 | $26.3M | 0.57% | +25,000+18.4% | Added |
| TD Asset Management Inc | 163,424 | $26.7M | 0.02% | −99,054−37.7% | Reduced |
| SEB Asset Management AB | 165,576 | $27.1M | 0.12% | +165,576 | New |
| Russell Investments Group, Ltd. | 169,162 | $27.7M | 0.03% | +24,067+16.6% | Added |
| Susquehanna International Group, LLP | 173,630 | $28.4M | 0.04% | −14,946−7.9% | Reduced |
| Tremblant Capital Group | 173,637 | $28.4M | 0.91% | −2,013−1.1% | Reduced |
| State Board of Administration of Florida Retirement System | 180,405 | $29.5M | 0.06% | +110+0.1% | Added |
| Nicholas Investment Partners, LP | 182,540 | $29.8M | 2.15% | +2,130+1.2% | Added |
| Davern Capital Partners, LP | 182,562 | $29.9M | 8.19% | +182,562 | New |
| Cormorant Asset Management, LP | 190,000 | $31.1M | 1.57% | −85,000−30.9% | Reduced |
| Defilade Capital Management, L.P. | 194,909 | $31.9M | 4.48% | +144,909+289.8% | Added |
| Loomis Sayles & Co L P | 194,982 | $31.9M | 0.04% | −4,973−2.5% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 207,527 | $33.9M | 0.50% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 221,707 | $36.3M | 0.07% | −158,854−41.7% | Reduced |
| Eagle Health Investments LP | 224,271 | $36.7M | 7.70% | +13,371+6.3% | Added |
| First Trust Advisors LP | 229,563 | $37.5M | 0.03% | −18,377−7.4% | Reduced |
| Evergreen Quality Fund GP, Ltd. | 232,500 | $38.0M | 0.87% | +112,000+92.9% | Added |
| Citigroup Inc | 233,304 | $38.1M | 0.02% | −4,610−1.9% | Reduced |
| Two Sigma Investments, LP | 237,017 | $38.8M | 0.03% | −725,139−75.4% | Reduced |
| Axiom Investors LLC | 239,447 | $39.2M | 0.44% | −16,402−6.4% | Reduced |
| Voya Investment Management LLC | 243,706 | $39.9M | 0.04% | +42,742+21.3% | Added |
| First Turn Management, LLC | 248,475 | $40.6M | 4.54% | −15,818−6.0% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 255,247 | $41.7M | 0.03% | +32,981+14.8% | Added |
| Tang Capital Management LLC | 260,000 | $42.5M | 2.16% | +200,000+333.3% | Added |
| Neuberger Berman Group LLC | 270,700 | $44.3M | 0.03% | +62,831+30.2% | Added |
| Rhumbline Advisers | 272,615 | $44.6M | 0.04% | +4,289+1.6% | Added |
| Barclays PLC | 275,731 | $45.1M | 0.02% | −168,975−38.0% | Reduced |
| Standard Life Aberdeen plc | 277,016 | $45.3M | 0.07% | +23,904+9.4% | Added |
| ProShare Advisors LLC | 283,141 | $46.3M | 0.07% | −57,599−16.9% | Reduced |
| Allspring Global Investments Holdings, LLC | 282,734 | $46.6M | 0.08% | +62,650+28.5% | Added |
| New York State Common Retirement Fund | 293,546 | $48.0M | 0.07% | +17,262+6.2% | Added |
| Bridgewater Associates, LP | 295,579 | $48.3M | 0.22% | +295,579 | New |
| Envestnet Asset Management Inc | 299,925 | $49.0M | 0.01% | +23,820+8.6% | Added |
| Nearwater Capital Markets, Ltd | 300,000 | $49.1M | 1.16% | −200,000−40.0% | Reduced |
| California State Teachers Retirement System | 303,182 | $49.6M | 0.05% | −7,148−2.3% | Reduced |
| National Pension Service | 311,881 | $51.0M | 0.04% | +31,439+11.2% | Added |
| Marshall Wace, LLP | 312,565 | $51.1M | 0.05% | −77,316−19.8% | Reduced |
| Rock Springs Capital Management LP | 314,300 | $51.4M | 3.03% | −4,950−1.6% | Reduced |
| California Public Employees Retirement System | 344,612 | $56.4M | 0.03% | −10,297−2.9% | Reduced |
| Sofinnova Investments, Inc. | 346,075 | $56.6M | 2.84% | +189,274+120.7% | Added |
| Vanguard Asset Management, Ltd | 360,075 | $58.9M | 0.05% | +360,075 | New |
| Gateway Investment Advisers LLC | 365,000 | $59.7M | 0.67% | 00.0% | Unchanged |
| Polar Capital Holdings Plc | 368,107 | $60.2M | 0.26% | +23,879+6.9% | Added |
| Victory Capital Management Inc | 396,245 | $64.8M | 0.04% | −250,469−38.7% | Reduced |
| Lord, Abbett & Co. LLC | 397,261 | $65.0M | 0.21% | −323,637−44.9% | Reduced |
| Wellington Management Group LLP | 399,044 | $65.3M | 0.01% | −87,094−17.9% | Reduced |