Inspire Medical SystemsINSP
13F holders, Q3 2025 (September 30)325holders −31
63new positions
93sold out
9famous investors
$74.25avg. 13F price*
At the end of Q3 2025, 325 institutions reported holding Inspire Medical Systems Inc. (INSP) in their 13F filings, down 31 from Q2 2025. 63 opened new positions and 93 sold out. The largest holders were BlackRock, Inc. ($263.2M), Vanguard Group Inc. ($222.6M) and Citadel Advisors ($129.7M). 9 famous investors held it, including Ken Griffin (0.1% of Citadel Advisors's portfolio), Ron Baron (0.0% of Baron Capital (BAMCO)'s portfolio) and Ray Dalio (0.0% of Bridgewater Associates's portfolio).
- Company
- Inspire Medical Systems Inc.
- CUSIP
- 457730109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 63 | $183.8M |
| Exits | 93 | $553.0M |
All 13F filers, Q2 2025 → Q3 2025: 9,859,790 shares bought and 12,374,575 shares sold, net −2,514,785 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 325 holders
| BlackRock, Inc. | 0.00% | Reduce -8.4% | 3,547,195 | $263.2M |
| Vanguard Group Inc. | 0.00% | Reduce -6.3% | 3,000,087 | $222.6M |
| Citadel Advisors | 0.11% | Add +20054.6% | 1,748,409 | $129.7M |
| William Blair Investment Management, LLC | 0.25% | Add +68.7% | 1,297,573 | $96.3M |
| Baillie Gifford & Co. | 0.06% | Reduce -2.6% | 1,084,350 | $80.5M |
| Deerfield Management Company, L.P. | 1.29% | Add +648.4% | 1,047,694 | $77.7M |
| State Street Corp. | 0.00% | Reduce -5.0% | 979,309 | $72.7M |
| Braidwell LP | 2.65% | Add +69.2% | 883,747 | $65.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.01% | Add +37.0% | 833,599 | $61.9M |
| FMR LLC | 0.00% | Reduce -67.2% | 749,312 | $55.6M |
| Soleus Capital Management, L.P. | 2.89% | Add +568.1% | 728,188 | $54.0M |
| Janus Henderson Group PLC | 0.02% | Add +4.1% | 667,078 | $49.5M |
| Balyasny Asset Management L.P. | 0.09% | New | 614,359 | $45.6M |
| Artisan Partners Limited Partnership | 0.06% | Add +45.2% | 526,242 | $39.0M |
| BNP Paribas Financial Markets | 0.03% | Add +773.7% | 522,180 | $38.7M |
| Geode Capital Management, LLC | 0.00% | Reduce -1.5% | 504,987 | $37.5M |
| UBS Group AG | 0.01% | Add +8.6% | 467,736 | $34.7M |
| Morgan Stanley | 0.00% | Add +48.8% | 450,641 | $33.4M |
| Champlain Investment Partners, LLC | 0.23% | Reduce -1.2% | 407,059 | $30.2M |
| Aberdeen Group plc | 0.05% | Add +63.0% | 396,340 | $30.0M |
| D. E. Shaw & Co. | 0.02% | Add +2423.3% | 358,857 | $26.6M |
| Millennium Management | 0.02% | New | 356,808 | $26.5M |
| Dimensional Fund Advisors LP | 0.01% | Reduce -0.3% | 343,718 | $25.5M |
| Franklin Resources Inc. | 0.01% | Add +30.1% | 297,245 | $22.1M |
| Bank of America Corp. | 0.00% | Add +13.5% | 288,828 | $21.4M |
| Brown Capital Management LLC | 0.85% | Reduce -24.3% | 278,040 | $20.6M |
| Goldman Sachs Group Inc. | 0.00% | Add +179.8% | 263,224 | $19.5M |
| Amundi | 0.01% | Add +38.7% | 255,124 | $19.5M |
| Eventide Asset Management, LLC | 0.31% | Add +63.8% | 256,658 | $19.0M |
| Keybank National Association | 0.05% | Reduce -0.3% | 200,005 | $14.8M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -31.9% | 193,134 | $14.3M |
| Baron Capital (BAMCO) | 0.04% | Reduce -61.4% | 190,023 | $14.1M |
| Northern Trust Corp. | 0.00% | Reduce -6.3% | 189,764 | $14.1M |
| Atika Capital Management LLC | 1.19% | Add +15.9% | 187,600 | $13.9M |
| Bank of New York Mellon Corp | 0.00% | Reduce -49.1% | 166,876 | $12.4M |
| Frontier Capital Management Co. LLC | 0.11% | Reduce -76.6% | 162,295 | $12.0M |
| Renaissance Technologies | 0.02% | Add +22.2% | 155,000 | $11.5M |
| M&G PLC | 0.06% | Add +173.9% | 144,960 | $10.7M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.03% | Reduce -34.5% | 139,317 | $10.3M |
| Capstone Investment Advisors, LLC | 0.11% | Add +3027.0% | 136,807 | $10.2M |
| Wasatch Advisors LP | 0.05% | Reduce -91.7% | 135,914 | $10.1M |
| Vestal Point Capital, LP | 0.45% | New | 135,000 | $10.0M |
| Marshall Wace, LLP | 0.01% | Add +744.2% | 134,269 | $10.0M |
| Principal Financial Group Inc. | 0.00% | Reduce -11.5% | 128,984 | $9.6M |
| Walleye Capital LLC | 0.09% | Add +714416.7% | 128,613 | $9.5M |
| Credit Agricole S A | 0.03% | — | 125,255 | $9.3M |
| Integral Health Asset Management, LLC | 0.65% | Add +71.4% | 120,000 | $8.9M |
| Ra Capital Management, L.P. | 0.11% | New | 114,901 | $8.5M |
| Rock Springs Capital Management LP | 0.48% | Add +2.8% | 110,500 | $8.2M |
| WCM Investment Management, LLC | 0.02% | Reduce -3.3% | 107,032 | $8.1M |
| Public Sector Pension Investment Board | 0.03% | Add +4.5% | 104,984 | $7.8M |
| Federated Hermes, Inc. | 0.01% | Reduce -54.5% | 103,804 | $7.7M |
| Riverbridge Partners LLC | 0.13% | Reduce -9.1% | 103,571 | $7.7M |
| Regal Partners Ltd | 0.54% | New | 101,714 | $7.5M |
| Y-Intercept (Hong Kong) Ltd | 0.18% | Add +553.1% | 99,049 | $7.3M |
| Cubist Systematic Strategies, LLC | 0.10% | New | 97,387 | $7.2M |
| Invesco Ltd. | 0.00% | Reduce -72.2% | 92,787 | $6.9M |
| Point72 Asset Management | 0.02% | Add +21.9% | 91,896 | $6.8M |
| WINTON GROUP Ltd | 0.25% | Add +1030.7% | 91,458 | $6.8M |
| Lazard Asset Management LLC | 0.01% | Add +24.3% | 89,605 | $6.6M |
| Ameriprise Financial Inc. | 0.00% | Reduce -20.8% | 89,071 | $6.6M |
| Bridgewater Associates | 0.03% | Reduce -37.2% | 88,952 | $6.6M |
| Voloridge Investment Management, LLC | 0.02% | New | 88,301 | $6.6M |
| Legal & General Group Plc | 0.00% | Reduce -11.9% | 84,280 | $6.3M |
| Man Group plc | 0.01% | Reduce -78.0% | 83,845 | $6.2M |
| Qube Research & Technologies Ltd | 0.01% | New | 82,810 | $6.1M |
| JPMorgan Chase & Co. | 0.00% | Reduce -79.1% | 80,374 | $6.0M |
| Voleon Capital Management LP | 0.14% | New | 78,518 | $5.8M |
| Susquehanna Portfolio Strategies, LLC | 0.09% | New | 75,555 | $5.6M |
| State of Wisconsin Investment Board | 0.01% | Add +6.8% | 73,104 | $5.4M |
| Capital Fund Management S.A. | 0.05% | Add +6.3% | 72,997 | $5.4M |
| Verition Fund Management LLC | 0.03% | Add +336.3% | 71,695 | $5.3M |
| Jane Street Group, LLC | 0.01% | New | 71,451 | $5.3M |
| Susquehanna International Group, LLP | 0.01% | Add +284.5% | 69,328 | $5.1M |
| Rhumbline Advisers | 0.00% | Reduce -5.0% | 67,200 | $5.0M |
| Mairs & Power Inc. | 0.05% | Reduce -3.5% | 65,446 | $4.9M |
| Weiss Asset Management LP | 0.08% | New | 63,029 | $4.7M |
| Rhenman & Partners Asset Management AB | 0.50% | Add +100.0% | 61,000 | $4.5M |
| Bellevue Group AG | 0.09% | Reduce -22.5% | 58,648 | $4.4M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | New | 58,497 | $4.3M |
| Mitsubishi UFJ Trust & Banking Corp | 0.01% | Reduce -3.1% | 55,805 | $4.1M |
| Swiss National Bank | 0.00% | Reduce -4.2% | 54,400 | $4.0M |
| Rheos Capital Works Inc. | 0.22% | No change | 52,400 | $3.9M |
| New York State Common Retirement Fund | 0.00% | Reduce -73.7% | 50,247 | $3.7M |
| Affinity Asset Advisors, LLC | 0.36% | New | 50,000 | $3.7M |
| AQR Capital Management | 0.00% | Reduce -59.3% | 49,417 | $3.7M |
| Nuveen, LLC | 0.00% | Reduce -0.3% | 47,852 | $3.6M |
| Teachers Retirement System of the State of Kentucky | 0.03% | Add +8.5% | 46,366 | $3.4M |
| HRT Financial LP | 0.01% | New | 45,681 | $3.4M |
| Macquarie Group Ltd. | 0.00% | Reduce -91.3% | 43,324 | $3.2M |
| HSBC Holdings PLC | 0.00% | Add +446.8% | 43,538 | $3.2M |
| Citigroup Inc. | 0.00% | Reduce -17.9% | 42,328 | $3.1M |
| Bank of Montreal | 0.00% | Add +661.1% | 41,916 | $3.1M |
| Quantbot Technologies LP | 0.08% | New | 41,063 | $3.0M |
| Kopp Family Office, LLC | 1.96% | No change | 40,614 | $3.0M |
| Canada Pension Plan Investment Board | 0.00% | Add +280.8% | 39,600 | $2.9M |
| Point72 Hong Kong Ltd | 0.13% | Add +124.2% | 39,122 | $2.9M |
| Two Sigma Investments, LP | 0.00% | Add +92.0% | 37,152 | $2.8M |
| Aquatic Capital Management LLC | 0.05% | New | 37,058 | $2.7M |
| Bullseye Asset Management LLC | 1.40% | No change | 36,128 | $2.7M |
"% of holder's portfolio" is INSP's weight in each manager's 13F, not the share of Inspire Medical Systems Inc. the manager owns.