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, Q1 2026
Institutional positions in Inspire Medical Systems, 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
- 301
- −34 vs. Q4 2025
- Shares held
- 34.9M
- +4.10M (+13.3%) vs. Q4 2025
- Total value
- $1.80B
- −$1.04B (−36.6%) vs. Q4 2025
- New holders
- 59
- 120 more added
- Sold out
- 93
- 99 more reduced
8 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 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, Q1 2026
Shares, value and share of portfolio for each institution holding Inspire Medical Systems, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 3,549,554 | $183.1M | 0.00% | −1,2940.0% | Reduced |
| Deerfield Management Company, L.P. (Series C) | 2,703,238 | $139.4M | 1.64% | +1,197,366+79.5% | Added |
| Wellington Management Group LLP | 2,535,954 | $130.8M | 0.02% | +324,863+14.7% | Added |
| Vanguard Portfolio Management LLC | 1,637,173 | $84.4M | 0.00% | +1,637,173 | New |
| Morgan Stanley | 1,450,634 | $74.8M | 0.00% | +190,872+15.2% | Added |
| Vanguard Capital Management LLC | 1,266,738 | $65.3M | 0.00% | +1,266,738 | New |
| D. E. Shaw & Co., Inc. | 1,188,537 | $61.3M | 0.05% | −23,625−1.9% | Reduced |
| William Blair Investment Management, LLC | 1,137,384 | $58.7M | 0.19% | −23,901−2.1% | Reduced |
| State Street Corp | 956,011 | $49.3M | 0.00% | +37,507+4.1% | Added |
| Artisan Partners Limited Partnership | 780,575 | $40.3M | 0.07% | −5,167−0.7% | Reduced |
| Braidwell LP | 677,570 | $34.9M | 1.17% | +136,680+25.3% | Added |
| Goldman Sachs Group Inc | 664,003 | $34.2M | 0.00% | +379,118+133.1% | Added |
| UBS Group AG | 638,928 | $33.0M | 0.01% | +227,599+55.3% | Added |
| Soleus Capital Management, L.P. | 576,299 | $29.7M | 1.20% | +276,900+92.5% | Added |
| Vestal Point Capital, LP | 539,269 | $27.8M | 0.78% | +539,269 | New |
| Assenagon Asset Management S.A. | 520,174 | $26.8M | 0.04% | +255,175+96.3% | Added |
| Deutsche Bank AG | 513,175 | $26.5M | 0.01% | −3,641−0.7% | Reduced |
| Geode Capital Management, LLC | 510,234 | $26.3M | 0.00% | +18,484+3.8% | Added |
| Standard Life Aberdeen plc | 477,476 | $24.6M | 0.04% | +16,575+3.6% | Added |
| Renaissance Technologies LLC | 469,968 | $24.2M | 0.04% | +59,200+14.4% | Added |
| UBS Asset Management Americas Inc | 448,787 | $23.1M | 0.00% | −14,529−3.1% | Reduced |
| ADAR1 Capital Management, LLC | 405,197 | $20.9M | 1.26% | +390,197+2,601.3% | Added |
| Citadel Advisors LLC | 394,076 | $20.3M | 0.01% | −117,242−22.9% | Reduced |
| Millennium Management LLC | 386,146 | $19.9M | 0.01% | +184,006+91.0% | Added |
| Walleye Capital LLC | 358,489 | $18.5M | 0.11% | +280,272+358.3% | Added |
| Ra Capital Management, L.P. | 325,663 | $16.8M | 0.18% | +183,699+129.4% | Added |
| BNP Paribas Arbitrage, SA | 319,758 | $16.5M | 0.01% | −135,052−29.7% | Reduced |
| AQR Capital Management LLC | 308,662 | $15.9M | 0.01% | +281,622+1,041.5% | Added |
| Jefferies Financial Group Inc. | 306,423 | $15.8M | 0.19% | −1,165−0.4% | Reduced |
| Bamco Inc | 298,470 | $15.4M | 0.05% | −39,016−11.6% | Reduced |
| Amundi | 256,830 | $13.2M | 0.00% | −107,792−29.6% | Reduced |
| Royal Bank of Canada | 252,971 | $13.0M | 0.00% | +241,987+2,203.1% | Added |
| Dimensional Fund Advisors LP | 234,670 | $12.1M | 0.00% | −106,727−31.3% | Reduced |
| Susquehanna International Group, LLP | 210,573 | $10.9M | 0.01% | +162,076+334.2% | Added |
| Acadian Asset Management LLC | 209,486 | $10.8M | 0.02% | +186,071+794.7% | Added |
| Northern Trust Corp | 197,033 | $10.2M | 0.00% | −423−0.2% | Reduced |
| Bank of America Corp | 186,069 | $9.60M | 0.00% | −24,057−11.4% | Reduced |
| Charles Schwab Investment Management Inc | 183,351 | $9.46M | 0.00% | −10,804−5.6% | Reduced |
| Cerity Partners LLC | 181,426 | $9.36M | 0.01% | +181,426 | New |
| Price T Rowe Associates Inc | 181,313 | $9.35M | 0.00% | −126,858−41.2% | Reduced |
| Bridgewater Associates, LP | 173,533 | $8.95M | 0.04% | +101,806+141.9% | Added |
| Vanguard Fiduciary Trust Co | 167,700 | $8.65M | 0.00% | +167,700 | New |
| Tudor Investment Corp Et Al | 167,218 | $8.63M | 0.05% | +54,345+48.1% | Added |
| Canada Pension Plan Investment Board | 164,100 | $8.46M | 0.01% | +58,600+55.5% | Added |
| Champlain Investment Partners, LLC | 158,989 | $8.20M | 0.10% | −44,109−21.7% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 158,274 | $8.16M | 0.15% | +87,639+124.1% | Added |
| Balyasny Asset Management LLC | 151,856 | $7.83M | 0.02% | −35,370−18.9% | Reduced |
| Bank of New York Mellon Corp | 148,764 | $7.67M | 0.00% | −67,016−31.1% | Reduced |
| Ameriprise Financial Inc | 143,451 | $7.40M | 0.00% | +52,174+57.2% | Added |
| Longaeva Partners L.P. | 138,761 | $7.16M | 0.34% | +138,761 | New |
| Wasatch Advisors Inc | 138,603 | $7.15M | 0.05% | +22,535+19.4% | Added |
| VGI Partners Ltd | 135,767 | $7.00M | 0.38% | −75,537−35.7% | Reduced |
| Los Angeles Capital Management LLC | 132,954 | $6.86M | 0.03% | +132,813+94,193.6% | Added |
| Rock Springs Capital Management LP | 131,800 | $6.80M | 0.40% | +800+0.6% | Added |
| Principal Financial Group Inc | 126,788 | $6.54M | 0.00% | +1,269+1.0% | Added |
| Trexquant Investment LP | 121,490 | $6.27M | 0.05% | −91,759−43.0% | Reduced |
| Rheos Capital Works Inc. | 117,400 | $6.05M | 0.40% | 00.0% | Unchanged |
| Capital Fund Management S.A. | 109,015 | $5.62M | 0.05% | −13,691−11.2% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 106,157 | $5.48M | 0.08% | +103,657+4,146.3% | Added |
| SG Americas Securities, LLC | 105,147 | $5.42M | 0.01% | +66,698+173.5% | Added |
| Invesco Ltd. | 103,973 | $5.36M | 0.00% | −157,401−60.2% | Reduced |
| Voloridge Investment Management, LLC | 100,207 | $5.17M | 0.02% | −87,893−46.7% | Reduced |
| Bellevue Group AG | 99,735 | $5.14M | 0.12% | −1,026−1.0% | Reduced |
| Public Sector Pension Investment Board | 93,086 | $4.80M | 0.01% | +1,614+1.8% | Added |
| Riverbridge Partners LLC | 92,494 | $4.77M | 0.12% | −4,617−4.8% | Reduced |
| Gotham Asset Management, LLC | 87,733 | $4.53M | 0.01% | +39,186+80.7% | Added |
| Nuveen, LLC | 85,169 | $4.39M | 0.00% | −74,252−46.6% | Reduced |
| Two Sigma Investments, LP | 85,096 | $4.39M | 0.00% | +25,581+43.0% | Added |
| Brown Capital Management LLC | 84,368 | $4.35M | 0.62% | −35,567−29.7% | Reduced |
| Edgestream Partners, L.P. | 82,268 | $4.24M | 0.14% | +64,315+358.2% | Added |
| Glenmede Trust Co NA | 81,495 | $4.20M | 0.02% | −491−0.6% | Reduced |
| Worldquant Millennium Advisors LLC | 75,239 | $3.88M | 0.01% | +68,035+944.4% | Added |
| First Trust Advisors LP | 71,661 | $3.70M | 0.00% | +68,589+2,232.7% | Added |
| New York State Common Retirement Fund | 70,885 | $3.66M | 0.01% | +2,111+3.1% | Added |
| Rhumbline Advisers | 67,907 | $3.50M | 0.00% | +2,013+3.1% | Added |
| Barclays PLC | 67,641 | $3.49M | 0.00% | −18,014−21.0% | Reduced |
| Nomura Asset Management International Inc. | 67,280 | $3.47M | 0.01% | +15,034+28.8% | Added |
| Squarepoint Ops LLC | 66,814 | $3.45M | 0.01% | +59,992+879.4% | Added |
| Qube Research & Technologies Ltd | 66,184 | $3.41M | 0.00% | +66,184 | New |
| Victory Capital Management Inc | 64,260 | $3.31M | 0.00% | +52,938+467.6% | Added |
| Legal & General Group Plc | 61,583 | $3.18M | 0.00% | −8,173−11.7% | Reduced |
| Bank of Nova Scotia | 60,000 | $3.09M | 0.01% | +19,958+49.8% | Added |
| Swiss National Bank | 55,500 | $2.86M | 0.00% | 00.0% | Unchanged |
| Man Group plc | 54,488 | $2.81M | 0.01% | +13,063+31.5% | Added |
| Algert Global LLC | 52,860 | $2.73M | 0.04% | +6,610+14.3% | Added |
| Intech Investment Management LLC | 52,702 | $2.72M | 0.03% | +46,482+747.3% | Added |
| JPMorgan Chase & Co | 53,615 | $2.70M | 0.00% | +8,227+18.1% | Added |
| Bullseye Asset Management LLC | 51,128 | $2.64M | 1.53% | +15,000+41.5% | Added |
| Franklin Resources Inc | 43,227 | $2.23M | 0.00% | −188,211−81.3% | Reduced |
| SEI Investments Co | 42,100 | $2.17M | 0.00% | −8,840−17.4% | Reduced |
| Nordea Investment Management AB | 40,420 | $2.06M | 0.00% | +29,032+254.9% | Added |
| FMR LLC | 37,984 | $1.96M | 0.00% | −99,322−72.3% | Reduced |
| Empowered Funds, LLC | 34,876 | $1.80M | 0.01% | +34,876 | New |
| California State Teachers Retirement System | 34,473 | $1.78M | 0.00% | +8,287+31.6% | Added |
| Voleon Capital Management LP | 33,122 | $1.71M | 0.04% | −30,505−47.9% | Reduced |
| Axq Capital, LP | 33,014 | $1.70M | 0.22% | +33,014 | New |
| XTX Topco Ltd | 32,483 | $1.68M | 0.03% | −13,300−29.1% | Reduced |
| Citigroup Inc | 31,606 | $1.63M | 0.00% | −3,066−8.8% | Reduced |
| Zacks Investment Management | 30,021 | $1.55M | 0.01% | +30,021 | New |
| Engineers Gate Manager LP | 29,567 | $1.53M | 0.02% | +10,363+54.0% | Added |