INSMED Inc hedge fund holdings
INSMNASDAQ$111.12+2.53 (+2.33%)as of Oct 2, 2026
Every quarter, large institutional investment managers with over $100M in U.S.-listed assets under management disclose their U.S. equity holdings through 13F filings. Read together, those filings show which businesses professional capital is moving into and out of.
Price vs funds buying and selling
INSM · close · 13FReported Aug 14, 2026Price vs funds buying and selling data
Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (-27.3%). 0 fund reports plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Funds buying · new + increased
Funds selling · reduced + closed
Net buyers vs sellers
Buying = new + increased; selling = reduced + closed. Counts exclude position changes under 5% of the fund's holding last quarter.Price and fund activity data
| Quarter | Funds buying | Funds selling | Bought | Sold | Filers | Reported |
|---|---|---|---|---|---|---|
| Q2 2025 | 234 | 195 | $4.22B | $3.18B | 480 | Aug 14, 2025 |
| Q3 2025 | 255 | 217 | $7.93B | $4.19B | 532 | Nov 14, 2025 |
| Q4 2025 | 332 | 216 | $5.03B | $8.79B | 638 | Feb 14, 2026 |
| Q1 2026 | 286 | 230 | $3.98B | $3.07B | 637 | May 15, 2026 |
| Q2 2026 | 281 | 282 | $4.45B | $4.95B | 619 | Aug 14, 2026 |
Quarterly action breakdown
Q2 2026
619 filersNew position
103$969M+9.09M sh
Increased
178$3.48B+32.6M sh
Reduced
176-$4.48B-42.1M sh
Out / sold
106-$462M-4.34M sh
Last 4 quarters · free
Reported Aug 14, 2026
| Fund | Action | Change in dollar | Value | % of portfolio | Reported |
|---|---|---|---|---|---|
| Darwin Global Management, Ltd. | Reduce 61.73% | -$1.09B | $674M | 17.91% | Aug 14, 2026 |
| Orbis Allan Gray Ltd | Added 224.46% | +$448M | $648M | 2.23% | Aug 14, 2026 |
| Capital International Investors | Added 47.24% | +$282M | $878M | 0.18% | Aug 12, 2026 |
| Maverick Capital Ltd | New Buy | +$229M | $229M | 2.03% | Aug 14, 2026 |
| Capital World Investors | Sell 100% | -$223M | $0 | 0.00% | Aug 12, 2026 |
| T. Rowe Price Investment Management, Inc. | New Buy | +$173M | $173M | 0.11% | Aug 14, 2026 |
| Bellevue Group AG | Added 13786.96% | +$147M | $149M | 3.13% | Aug 14, 2026 |
| Baker Bros. Advisors LP | Added 18.53% | +$147M | $938M | 4.70% | Aug 14, 2026 |
| Artisan Partners Limited Partnership | Reduce 16.63% | -$116M | $580M | 0.92% | Aug 13, 2026 |
| Nwi Management LP | Reduce 50.00% | -$108M | $108M | 5.00% | Aug 14, 2026 |
| Summit Partners Public Asset Management, LLC | Sell 100% | -$107M | $0 | 0.00% | Aug 14, 2026 |
| Nomura Asset Management International Inc. | Reduce 80.84% | -$98.6M | $23.4M | 0.04% | Aug 14, 2026 |
| Lord, Abbett & Co. LLC | Sell 100% | -$65M | $0 | 0.00% | Aug 14, 2026 |
| Railway Pension Investments Ltd | New Buy | +$64.5M | $64.5M | 0.81% | Aug 14, 2026 |
| Polar Capital Holdings Plc | Added 142.01% | +$55.7M | $95M | 0.22% | Aug 14, 2026 |
| Nearwater Capital Markets, Ltd | Sell 100% | -$49.1M | $0 | 0.00% | Aug 14, 2026 |
| Long Focus Capital Management, LLC | Added 264.14% | +$40.8M | $56.3M | 1.44% | Aug 14, 2026 |
| Davern Capital Partners, LP | Added 206.65% | +$40.2M | $59.7M | 10.18% | Aug 13, 2026 |
| Prosight Management, LP | New Buy | +$40M | $40M | 6.90% | Aug 14, 2026 |
| Hood River Capital Management LLC | Added 53.49% | +$39.3M | $113M | 0.82% | Aug 14, 2026 |
| Axiom Investors LLC | Sell 100% | -$39.2M | $0 | 0.00% | Aug 12, 2026 |
| Evergreen Quality Fund GP, Ltd. | Sell 100% | -$38M | $0 | 0.00% | Aug 14, 2026 |
| Frontier Capital Management Co LLC | Added 69.36% | +$34.7M | $84.8M | 0.79% | Aug 14, 2026 |
| Susquehanna Portfolio Strategies, LLC | Sell 100% | -$33.9M | $0 | 0.00% | Aug 14, 2026 |
| Samlyn Capital, LLC | Added 75.59% | +$33.6M | $78.1M | 1.27% | Aug 14, 2026 |
| Aberdeen Group plc | Added 108.45% | +$32M | $61.6M | 0.09% | Jul 31, 2026 |
| Jennison Associates LLC | Added 49.68% | +$32M | $96.5M | 0.06% | Aug 3, 2026 |
| Loomis Sayles & Co L P | Sell 100% | -$31.9M | $0 | 0.00% | Aug 14, 2026 |
| National Pension Service | Reduce 91.45% | -$30.4M | $2.84M | 0.00% | Aug 13, 2026 |
| Castle Hook Partners LP | Reduce 21.77% | -$29.5M | $106M | 0.49% | Aug 14, 2026 |
| William Blair Investment Management, LLC | Reduce 30.23% | -$29.1M | $67.2M | 0.20% | Aug 12, 2026 |
| Duquesne Family Office LLC | Added 23.45% | +$28.9M | $152M | 2.92% | Aug 14, 2026 |
| Vestal Point Capital, LP | New Buy | +$26.7M | $26.7M | 0.62% | Aug 14, 2026 |
| Patient Square Capital LP | Sell 100% | -$25.8M | $0 | 0.00% | Aug 12, 2026 |
| Trails Edge Capital Partners, LP | New Buy | +$24.6M | $24.6M | 3.90% | Aug 14, 2026 |
| Ensign Peak Advisors, Inc | Added 40.66% | +$21.7M | $74.9M | 0.12% | Aug 14, 2026 |
| Longaeva Partners L.P. | New Buy | +$21.5M | $21.5M | 0.47% | Aug 14, 2026 |
| USS Investment Management Ltd | New Buy | +$20.9M | $20.9M | 0.08% | Aug 11, 2026 |
| ADAR1 Capital Management, LLC | Added 545.68% | +$20.6M | $24.4M | 1.12% | Aug 14, 2026 |
| Holocene Advisors, LP | New Buy | +$20.6M | $20.6M | 0.05% | Aug 14, 2026 |
| Sofinnova Investments, Inc. | Reduce 54.23% | -$20M | $16.9M | 0.87% | Aug 14, 2026 |
| Fiera Capital Corp | Reduce 17.51% | -$19.1M | $89.9M | 0.33% | Aug 7, 2026 |
| Schroder Investment Management Group | Added 148.73% | +$19M | $31.8M | 0.02% | Aug 13, 2026 |
| Affinity Asset Advisors, LLC | Added 35.42% | +$18.1M | $69.3M | 3.13% | Aug 13, 2026 |
| NEOS Investment Management LLC | Sell 100% | -$18.1M | $0 | 0.00% | Aug 11, 2026 |
| Driehaus Capital Management LLC | Sell 100% | -$17.2M | $0 | 0.00% | Aug 14, 2026 |
| Westfield Capital Management Co LP | Added 10.97% | +$17.2M | $174M | 0.57% | Aug 12, 2026 |
| DNB Asset Management AS | Added 301.09% | +$17.1M | $22.7M | 0.06% | Aug 11, 2026 |
| Tang Capital Management LLC | Reduce 61.54% | -$17.1M | $10.7M | 0.48% | Aug 14, 2026 |
| Eagle Health Investments LP | Added 71.28% | +$17M | $41M | 6.79% | Aug 10, 2026 |
| Bridgewater Associates, LP | Added 54.07% | +$17M | $48.6M | 0.20% | Aug 14, 2026 |
| Nicholas Investment Partners, LP | Reduce 86.11% | -$16.8M | $2.7M | 0.15% | Aug 14, 2026 |
| Eversept Partners, LP | New Buy | +$15.9M | $15.9M | 0.83% | Aug 14, 2026 |
| Capital Fund Management S.A. | New Buy | +$15.9M | $15.9M | 0.07% | Aug 13, 2026 |
| Wellington Management Group LLP | Added 36.30% | +$15.4M | $58M | 0.01% | Aug 14, 2026 |
| Perpetual Ltd | Reduce 97.54% | -$14.8M | $375K | 0.01% | Jul 15, 2026 |
| Marsico Capital Management LLC | New Buy | +$13.8M | $13.8M | 0.36% | Aug 13, 2026 |
| Jones Hill Capital LP | New Buy | +$13M | $13M | 2.77% | Aug 13, 2026 |
| Handelsbanken Fonder AB | Added 180.94% | +$13M | $20.2M | 0.06% | Jul 10, 2026 |
| Novo Holdings A/S | New Buy | +$12.9M | $12.9M | 0.75% | Aug 14, 2026 |
| Sphera Funds Management Ltd. | New Buy | +$12.7M | $12.7M | 1.65% | Aug 14, 2026 |
| Pictet Asset Management Holding SA | Added 10.71% | +$12.6M | $130M | 0.12% | Jul 30, 2026 |
| Cormorant Asset Management, LP | Reduce 60.53% | -$12.3M | $8M | 0.41% | Aug 14, 2026 |
| PFA Pension, Forsikringsaktieselskab | Reduce 99.12% | -$12.1M | $107K | 0.00% | Aug 12, 2026 |
| Jain Global LLC | New Buy | +$11.9M | $11.9M | 0.05% | Aug 14, 2026 |
| C WorldWide Group Holding A/S | Added 62.07% | +$10.7M | $27.8M | 0.67% | Aug 4, 2026 |
| Integral Health Asset Management, LLC | Added 6.67% | +$10.7M | $171M | 6.74% | Aug 14, 2026 |
| Kynam Capital Management, LP | New Buy | +$10.7M | $10.7M | 0.59% | Aug 14, 2026 |
| Cinctive Capital Management LP | Added 121.72% | +$9.48M | $17.3M | 0.64% | Aug 14, 2026 |
| Defilade Capital Management, L.P. | Added 44.60% | +$9.27M | $30M | 4.02% | Aug 14, 2026 |
| Healthcare of Ontario Pension Plan Trust Fund | Sell 100% | -$9.24M | $0 | 0.00% | Aug 13, 2026 |
| Rafferty Asset Management, LLC | Reduce 74.11% | -$9.17M | $3.2M | 0.01% | Aug 14, 2026 |
| IMC-Chicago, LLC | Added 1602.28% | +$7.64M | $8.12M | 0.00% | Aug 6, 2026 |
| Paradigm Biocapital Advisors LP | Added 5.70% | +$7.62M | $141M | 2.65% | Aug 14, 2026 |
| Worldquant Millennium Advisors LLC | New Buy | +$7.38M | $7.38M | 0.03% | Aug 14, 2026 |
| CenterBook Partners LP | Added 192.78% | +$7.24M | $11M | 0.54% | Aug 11, 2026 |
| Elmind Capital, LP | New Buy | +$6.93M | $6.93M | 1.74% | Aug 14, 2026 |
| Sumitomo Mitsui Trust Group, Inc. | Reduce 12.68% | -$6.78M | $46.7M | 0.03% | Jul 30, 2026 |
| First Trust Advisors LP | Reduce 25.56% | -$6.26M | $18.2M | 0.01% | Aug 11, 2026 |
| EULAV Asset Management | Added 63.04% | +$6.18M | $16M | 0.51% | Jul 29, 2026 |
| VANGUARD ASSET MANAGEMENT, Ltd | Added 15.56% | +$5.97M | $44.4M | 0.03% | Aug 13, 2026 |
| Illinois Municipal Retirement Fund | New Buy | +$5.62M | $5.62M | 0.06% | Aug 12, 2026 |
| Ishara Investments LP | New Buy | +$5.46M | $5.46M | 4.01% | Aug 14, 2026 |
| Adage Capital Partners GP, L.L.C. | Reduce 5.56% | -$5.33M | $90.6M | 0.13% | Aug 14, 2026 |
| Canada Pension Plan Investment Board | Added 124.31% | +$5.29M | $9.54M | 0.01% | Aug 14, 2026 |
| Voloridge Investment Management, LLC | Sell 100% | -$5.26M | $0 | 0.00% | Aug 14, 2026 |
| Rock Springs Capital Management LP | Added 15.22% | +$5.1M | $38.6M | 1.88% | Aug 14, 2026 |
| Empowered Funds, LLC | Reduce 90.78% | -$5.03M | $511K | 0.00% | Aug 17, 2026 |
| Swedbank AB | Added 56.30% | +$4.97M | $13.8M | 0.01% | Jul 15, 2026 |
| Tredje AP-fonden | Reduce 57.70% | -$4.71M | $3.46M | 0.02% | Aug 10, 2026 |
| Campbell & CO Investment Adviser LLC | New Buy | +$4.68M | $4.68M | 0.25% | Aug 3, 2026 |
| Fred Alger Management, LLC | Reduce 34.54% | -$4.63M | $8.78M | 0.03% | Aug 14, 2026 |
| Guggenheim Capital LLC | Reduce 51.56% | -$4.4M | $4.13M | 0.03% | Aug 12, 2026 |
| Ofi Invest Asset Management | New Buy | +$4.38M | $4.38M | 0.04% | Jul 17, 2026 |
| Nwam LLC | Reduce 88.70% | -$4.24M | $541K | 0.03% | Jul 23, 2026 |
| Artia Global Partners LP | Reduce 6.31% | -$4.23M | $62.8M | 11.59% | Aug 14, 2026 |
| Atle Fund Management AB | Reduce 40.09% | -$4.16M | $6.22M | 1.67% | Jul 24, 2026 |
| CIBC Asset Management Inc | Reduce 78.94% | -$4.06M | $1.08M | 0.00% | Aug 3, 2026 |
| BI Asset Management Fondsmaeglerselskab A/S | Added 474.84% | +$4.05M | $4.91M | 0.04% | Aug 10, 2026 |
| Eventide Asset Management, LLC | Added 6.84% | +$3.98M | $62.2M | 0.83% | Aug 14, 2026 |