Inspire Medical Systems, Inc.
INSP- Exchange
- NYSE
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001609550
In the last 90 days, Inspire Medical Systems, Inc. insiders filed 0 open-market purchases and 1 sale; 275 institutions reported holding it in 13F filings for Q2 2026, worth $1.65B in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Inspire Medical Systems, Inc. as of Sep 30, 2025. 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
- 325
- −27 vs. Q2 2025
- Shares held
- 31.1M
- −2.40M (−7.2%) vs. Q2 2025
- Total value
- $2.31B
- −$2.04B (−46.9%) vs. Q2 2025
- New holders
- 66
- 97 more added
- Sold out
- 93
- 131 more reduced
4 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting INSP 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 | 275 | $1.65B |
| Q1 2026 | 301 | $1.80B |
| Q4 2025 | 343 | $3.12B |
| Q3 2025 | 325 | $2.31B |
| Q2 2025 | 356 | $4.39B |
| Q1 2025 | 363 | $5.46B |
| Q4 2024 | 357 | $6.20B |
| Q3 2024 | 347 | $7.03B |
| Q2 2024 | 325 | $4.23B |
| Q1 2024 | 327 | $6.83B |
| Q4 2023 | 343 | $6.31B |
| Q3 2023 | 365 | $5.65B |
| Q2 2023 | 407 | $9.11B |
| Q1 2023 | 374 | $6.68B |
| Q4 2022 | 340 | $7.11B |
| Q3 2022 | 301 | $5.01B |
| Q2 2022 | 287 | $5.01B |
| Q1 2022 | 299 | $6.92B |
| Q4 2021 | 289 | $5.95B |
| Q3 2021 | 254 | $5.91B |
| Q2 2021 | 248 | $4.83B |
| Q1 2021 | 251 | $5.21B |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Inspire Medical Systems, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 3,547,195 | $263.2M | 0.00% | −326,591−8.4% | Reduced |
| Vanguard Group Inc | 3,000,087 | $222.6M | 0.00% | −203,504−6.4% | Reduced |
| Citadel Advisors LLC | 1,748,409 | $129.7M | 0.10% | +1,739,734+20,054.6% | Added |
| William Blair Investment Management, LLC | 1,297,573 | $96.3M | 0.25% | +528,404+68.7% | Added |
| Baillie Gifford & Co | 1,084,350 | $80.5M | 0.06% | −29,538−2.7% | Reduced |
| Deerfield Management Company, L.P. (Series C) | 1,047,694 | $77.7M | 1.19% | +907,694+648.4% | Added |
| State Street Corp | 979,309 | $72.7M | 0.00% | −51,593−5.0% | Reduced |
| Braidwell LP | 883,747 | $65.6M | 1.95% | +361,337+69.2% | Added |
| UBS Asset Management Americas Inc | 833,599 | $61.9M | 0.01% | +225,291+37.0% | Added |
| FMR LLC | 749,312 | $55.6M | 0.00% | −1,536,430−67.2% | Reduced |
| Soleus Capital Management, L.P. | 728,188 | $54.0M | 2.89% | +619,188+568.1% | Added |
| Janus Henderson Group PLC | 667,078 | $49.5M | 0.02% | +26,155+4.1% | Added |
| Balyasny Asset Management LLC | 614,359 | $45.6M | 0.09% | +614,359 | New |
| Artisan Partners Limited Partnership | 526,242 | $39.0M | 0.06% | +163,916+45.2% | Added |
| BNP Paribas Arbitrage, SA | 522,180 | $38.7M | 0.03% | +462,412+773.7% | Added |
| Geode Capital Management, LLC | 504,987 | $37.5M | 0.00% | −7,849−1.5% | Reduced |
| UBS Group AG | 467,736 | $34.7M | 0.01% | +37,042+8.6% | Added |
| Morgan Stanley | 450,641 | $33.4M | 0.00% | +147,769+48.8% | Added |
| Champlain Investment Partners, LLC | 407,059 | $30.2M | 0.23% | −5,047−1.2% | Reduced |
| Standard Life Aberdeen plc | 396,340 | $30.0M | 0.05% | +153,238+63.0% | Added |
| D. E. Shaw & Co., Inc. | 358,857 | $26.6M | 0.02% | +344,635+2,423.3% | Added |
| Millennium Management LLC | 356,808 | $26.5M | 0.02% | +356,808 | New |
| Dimensional Fund Advisors LP | 343,718 | $25.5M | 0.01% | −1,149−0.3% | Reduced |
| Franklin Resources Inc | 297,245 | $22.1M | 0.01% | +68,681+30.0% | Added |
| Bank of America Corp | 288,828 | $21.4M | 0.00% | +34,354+13.5% | Added |
| Brown Capital Management LLC | 278,040 | $20.6M | 0.85% | −89,401−24.3% | Reduced |
| Goldman Sachs Group Inc | 263,224 | $19.5M | 0.00% | +169,158+179.8% | Added |
| Amundi | 255,124 | $19.5M | 0.01% | +71,168+38.7% | Added |
| Eventide Asset Management, LLC | 256,658 | $19.0M | 0.31% | +100,000+63.8% | Added |
| Keybank National Association | 200,005 | $14.8M | 0.05% | −626−0.3% | Reduced |
| Charles Schwab Investment Management Inc | 193,134 | $14.3M | 0.00% | −90,466−31.9% | Reduced |
| Bamco Inc | 190,023 | $14.1M | 0.04% | −301,729−61.4% | Reduced |
| Northern Trust Corp | 189,764 | $14.1M | 0.00% | −12,747−6.3% | Reduced |
| Atika Capital Management LLC | 187,600 | $13.9M | 1.19% | +25,700+15.9% | Added |
| Bank of New York Mellon Corp | 166,876 | $12.4M | 0.00% | −160,877−49.1% | Reduced |
| Frontier Capital Management Co LLC | 162,295 | $12.0M | 0.11% | −530,908−76.6% | Reduced |
| Renaissance Technologies LLC | 155,000 | $11.5M | 0.02% | +28,200+22.2% | Added |
| M&G Plc | 144,960 | $10.7M | 0.06% | +92,036+173.9% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 139,317 | $10.3M | 0.03% | −73,426−34.5% | Reduced |
| Capstone Investment Advisors, LLC | 136,807 | $10.2M | 0.09% | +132,432+3,027.0% | Added |
| Wasatch Advisors Inc | 135,914 | $10.1M | 0.05% | −1,498,481−91.7% | Reduced |
| Vestal Point Capital, LP | 135,000 | $10.0M | 0.45% | +135,000 | New |
| Marshall Wace, LLP | 134,269 | $9.96M | 0.01% | +118,364+744.2% | Added |
| Principal Financial Group Inc | 128,984 | $9.57M | 0.00% | −16,718−11.5% | Reduced |
| Walleye Capital LLC | 128,613 | $9.54M | 0.08% | +128,595+714,416.7% | Added |
| Credit Agricole S A | 125,255 | $9.29M | 0.03% | +125,255 | New |
| Integral Health Asset Management, LLC | 120,000 | $8.90M | 0.65% | +50,000+71.4% | Added |
| Ra Capital Management, L.P. | 114,901 | $8.53M | 0.11% | +114,901 | New |
| Rock Springs Capital Management LP | 110,500 | $8.20M | 0.48% | +3,000+2.8% | Added |
| WCM Investment Management, LLC | 107,032 | $8.09M | 0.02% | −3,701−3.3% | Reduced |
| Public Sector Pension Investment Board | 104,984 | $7.79M | 0.03% | +4,479+4.5% | Added |
| Federated Hermes, Inc. | 103,804 | $7.70M | 0.01% | −124,528−54.5% | Reduced |
| Riverbridge Partners LLC | 103,571 | $7.68M | 0.13% | −10,315−9.1% | Reduced |
| VGI Partners Ltd | 101,714 | $7.55M | 0.54% | +101,714 | New |
| Y-Intercept (Hong Kong) Ltd | 99,049 | $7.35M | 0.18% | +83,883+553.1% | Added |
| Cubist Systematic Strategies, LLC | 97,387 | $7.23M | 0.10% | +97,387 | New |
| Invesco Ltd. | 92,787 | $6.88M | 0.00% | −240,445−72.2% | Reduced |
| Point72 Asset Management, L.P. | 91,896 | $6.82M | 0.01% | +16,491+21.9% | Added |
| Winton Group Ltd | 91,458 | $6.79M | 0.25% | +83,369+1,030.6% | Added |
| Lazard Asset Management LLC | 89,605 | $6.65M | 0.01% | +17,500+24.3% | Added |
| Ameriprise Financial Inc | 89,071 | $6.61M | 0.00% | −23,379−20.8% | Reduced |
| Bridgewater Associates, LP | 88,952 | $6.60M | 0.03% | −52,695−37.2% | Reduced |
| Voloridge Investment Management, LLC | 88,301 | $6.55M | 0.02% | +88,301 | New |
| Legal & General Group Plc | 84,280 | $6.25M | 0.00% | −11,408−11.9% | Reduced |
| Man Group plc | 83,845 | $6.22M | 0.01% | −296,453−78.0% | Reduced |
| Qube Research & Technologies Ltd | 82,810 | $6.14M | 0.01% | +82,810 | New |
| JPMorgan Chase & Co | 80,374 | $5.96M | 0.00% | −303,667−79.1% | Reduced |
| Voleon Capital Management LP | 78,518 | $5.83M | 0.14% | +78,518 | New |
| Susquehanna Portfolio Strategies, LLC | 75,555 | $5.61M | 0.09% | +75,555 | New |
| State of Wisconsin Investment Board | 73,104 | $5.42M | 0.01% | +4,624+6.8% | Added |
| Capital Fund Management S.A. | 72,997 | $5.42M | 0.05% | +4,334+6.3% | Added |
| Verition Fund Management LLC | 71,695 | $5.32M | 0.03% | +55,261+336.3% | Added |
| Jane Street Group, LLC | 71,451 | $5.30M | 0.01% | +71,451 | New |
| Susquehanna International Group, LLP | 69,328 | $5.14M | 0.01% | +51,299+284.5% | Added |
| Rhumbline Advisers | 67,200 | $4.99M | 0.00% | −3,555−5.0% | Reduced |
| Mairs & Power Inc | 65,446 | $4.86M | 0.05% | −2,358−3.5% | Reduced |
| Weiss Asset Management LP | 63,029 | $4.68M | 0.07% | +63,029 | New |
| Rhenman & Partners Asset Management AB | 61,000 | $4.53M | 0.50% | +30,500+100.0% | Added |
| Bellevue Group AG | 58,648 | $4.35M | 0.09% | −17,012−22.5% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 58,497 | $4.34M | 0.01% | +58,497 | New |
| Mitsubishi UFJ Trust & Banking Corp | 55,805 | $4.14M | 0.01% | −1,806−3.1% | Reduced |
| Swiss National Bank | 54,400 | $4.04M | 0.00% | −2,400−4.2% | Reduced |
| Rheos Capital Works Inc. | 52,400 | $3.89M | 0.22% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 50,247 | $3.73M | 0.00% | −141,021−73.7% | Reduced |
| Affinity Asset Advisors, LLC | 50,000 | $3.71M | 0.35% | +50,000 | New |
| AQR Capital Management LLC | 49,417 | $3.67M | 0.00% | −71,993−59.3% | Reduced |
| Nuveen, LLC | 47,852 | $3.55M | 0.00% | −165−0.3% | Reduced |
| Teachers Retirement System of the State of Kentucky | 46,366 | $3.44M | 0.03% | +3,642+8.5% | Added |
| HRT Financial LP | 45,681 | $3.39M | 0.01% | +45,681 | New |
| Macquarie Group Ltd | 43,324 | $3.21M | 0.00% | −452,232−91.3% | Reduced |
| HSBC Holdings PLC | 43,538 | $3.19M | 0.00% | +35,576+446.8% | Added |
| Citigroup Inc | 42,328 | $3.14M | 0.00% | −9,200−17.9% | Reduced |
| Bank of Montreal | 41,916 | $3.11M | 0.00% | +36,409+661.1% | Added |
| Quantbot Technologies LP | 41,063 | $3.05M | 0.08% | +41,063 | New |
| Kopp Family Office, LLC | 40,614 | $3.01M | 1.96% | 00.0% | Unchanged |
| Canada Pension Plan Investment Board | 39,600 | $2.94M | 0.00% | +29,200+280.8% | Added |
| Point72 Hong Kong Ltd | 39,122 | $2.90M | 0.13% | +21,672+124.2% | Added |
| Two Sigma Investments, LP | 37,152 | $2.76M | 0.00% | +17,802+92.0% | Added |
| Aquatic Capital Management LLC | 37,058 | $2.75M | 0.05% | +37,058 | New |
| Bullseye Asset Management LLC | 36,128 | $2.68M | 1.40% | 00.0% | Unchanged |