Inspire Medical SystemsINSP
13F holders, Q1 2026 (March 31)301holders −42
51new positions
92sold out
9famous investors
$51.59avg. 13F price*
At the end of Q1 2026, 301 institutions reported holding Inspire Medical Systems Inc. (INSP) in their 13F filings, down 42 from Q4 2025. 51 opened new positions and 92 sold out. The largest holders were BlackRock, Inc. ($183.1M), Deerfield Management Company, L.P. ($139.4M) and Wellington Management Group LLP ($130.8M). 9 famous investors held it, including David E. Shaw (0.1% of D. E. Shaw & Co.'s portfolio), Ron Baron (0.0% of Baron Capital (BAMCO)'s portfolio) and Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio).
- Company
- Inspire Medical Systems Inc.
- CUSIP
- 457730109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 51 | $61.1M |
| Exits | 92 | $350.3M |
All 13F filers, Q4 2025 → Q1 2026: 7,616,681 shares bought and 6,619,572 shares sold, net +997,109 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 301 holders
| BlackRock, Inc. | 0.00% | Reduce -0.0% | 3,549,554 | $183.1M |
| Deerfield Management Company, L.P. | 1.94% | Add +79.5% | 2,703,238 | $139.4M |
| Wellington Management Group LLP | 0.02% | Add +14.7% | 2,535,954 | $130.8M |
| Vanguard Portfolio Management LLC | 0.00% | — | 1,637,173 | $84.4M |
| Morgan Stanley | 0.00% | Add +15.2% | 1,450,634 | $74.8M |
| Vanguard Capital Management LLC | 0.00% | — | 1,266,738 | $65.3M |
| D. E. Shaw & Co. | 0.05% | Reduce -1.9% | 1,188,537 | $61.3M |
| William Blair Investment Management, LLC | 0.19% | Reduce -2.1% | 1,137,384 | $58.7M |
| State Street Corp. | 0.00% | Add +4.1% | 956,011 | $49.3M |
| Artisan Partners Limited Partnership | 0.07% | Reduce -0.7% | 780,575 | $40.3M |
| Braidwell LP | 1.33% | Add +25.3% | 677,570 | $34.9M |
| Goldman Sachs Group Inc. | 0.00% | Add +133.1% | 664,003 | $34.2M |
| UBS Group AG | 0.01% | Add +55.3% | 638,928 | $33.0M |
| Soleus Capital Management, L.P. | 1.20% | Add +92.5% | 576,299 | $29.7M |
| Vestal Point Capital, LP | 0.78% | New | 539,269 | $27.8M |
| Assenagon Asset Management S.A. | 0.04% | Add +96.3% | 520,174 | $26.8M |
| Deutsche Bank AG | 0.01% | Reduce -0.7% | 513,175 | $26.5M |
| Geode Capital Management, LLC | 0.00% | Add +3.8% | 510,234 | $26.3M |
| Aberdeen Group plc | 0.04% | Add +3.6% | 477,476 | $24.6M |
| Renaissance Technologies | 0.04% | Add +14.4% | 469,968 | $24.2M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -3.1% | 448,787 | $23.1M |
| ADAR1 Capital Management, LLC | 1.27% | Add +2601.3% | 405,197 | $20.9M |
| Citadel Advisors | 0.01% | Reduce -22.9% | 394,076 | $20.3M |
| Millennium Management | 0.02% | Add +91.0% | 386,146 | $19.9M |
| Walleye Capital LLC | 0.12% | Add +358.3% | 358,489 | $18.5M |
| Ra Capital Management, L.P. | 0.18% | Add +129.4% | 325,663 | $16.8M |
| BNP Paribas Financial Markets | 0.01% | Reduce -29.7% | 319,758 | $16.5M |
| AQR Capital Management | 0.01% | Add +1041.5% | 308,662 | $15.9M |
| Jefferies Financial Group Inc. | 0.20% | Reduce -0.4% | 306,423 | $15.8M |
| Baron Capital (BAMCO) | 0.05% | Reduce -11.6% | 298,470 | $15.4M |
| Amundi | 0.00% | Reduce -29.6% | 256,830 | $13.2M |
| Royal Bank of Canada | 0.00% | Add +2203.1% | 252,971 | $13.0M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -31.3% | 234,670 | $12.1M |
| Susquehanna International Group, LLP | 0.01% | Add +334.2% | 210,573 | $10.9M |
| Acadian Asset Management LLC | 0.02% | Add +794.7% | 209,486 | $10.8M |
| Northern Trust Corp. | 0.00% | Reduce -0.2% | 197,033 | $10.2M |
| Bank of America Corp. | 0.00% | Reduce -11.4% | 186,069 | $9.6M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -5.6% | 183,351 | $9.5M |
| Cerity Partners LLC | 0.01% | New | 181,426 | $9.4M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -41.2% | 181,313 | $9.4M |
| Bridgewater Associates | 0.04% | Add +141.9% | 173,533 | $9.0M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 167,700 | $8.6M |
| Tudor Investment Corporation | 0.05% | Add +48.1% | 167,218 | $8.6M |
| Canada Pension Plan Investment Board | 0.01% | Add +55.5% | 164,100 | $8.5M |
| Champlain Investment Partners, LLC | 0.10% | Reduce -21.7% | 158,989 | $8.2M |
| Y-Intercept (Hong Kong) Ltd | 0.15% | Add +124.1% | 158,274 | $8.2M |
| Balyasny Asset Management L.P. | 0.02% | Reduce -18.9% | 151,856 | $7.8M |
| Bank of New York Mellon Corp | 0.00% | Reduce -31.1% | 148,764 | $7.7M |
| Ameriprise Financial Inc. | 0.00% | Add +57.2% | 143,451 | $7.4M |
| Longaeva Partners L.P. | 0.34% | New | 138,761 | $7.2M |
| Wasatch Advisors LP | 0.05% | Add +19.4% | 138,603 | $7.1M |
| Regal Partners Ltd | 0.38% | Reduce -35.8% | 135,767 | $7.0M |
| Los Angeles Capital Management LLC | 0.03% | Add +94193.6% | 132,954 | $6.9M |
| Rock Springs Capital Management LP | 0.40% | Add +0.6% | 131,800 | $6.8M |
| Principal Financial Group Inc. | 0.00% | Add +1.0% | 126,788 | $6.5M |
| Trexquant Investment LP | 0.05% | Reduce -43.0% | 121,490 | $6.3M |
| Rheos Capital Works Inc. | 0.40% | No change | 117,400 | $6.1M |
| Capital Fund Management S.A. | 0.05% | Reduce -11.2% | 109,015 | $5.6M |
| Susquehanna Portfolio Strategies, LLC | 0.08% | Add +4146.3% | 106,157 | $5.5M |
| SG Americas Securities, LLC | 0.01% | Add +173.5% | 105,147 | $5.4M |
| Invesco Ltd. | 0.00% | Reduce -60.2% | 103,973 | $5.4M |
| Voloridge Investment Management, LLC | 0.02% | Reduce -46.7% | 100,207 | $5.2M |
| Bellevue Group AG | 0.12% | Reduce -1.0% | 99,735 | $5.1M |
| Public Sector Pension Investment Board | 0.01% | Add +1.8% | 93,086 | $4.8M |
| Riverbridge Partners LLC | 0.12% | Reduce -4.8% | 92,494 | $4.8M |
| Gotham Asset Management | 0.01% | Add +80.7% | 87,733 | $4.5M |
| Nuveen, LLC | 0.00% | Reduce -46.6% | 85,169 | $4.4M |
| Two Sigma Investments, LP | 0.00% | Add +43.0% | 85,096 | $4.4M |
| Brown Capital Management LLC | 0.62% | Reduce -29.7% | 84,368 | $4.4M |
| Edgestream Partners, L.P. | 0.14% | Add +358.2% | 82,268 | $4.2M |
| Glenmede Trust Co. NA | 0.02% | Reduce -0.6% | 81,495 | $4.2M |
| Worldquant Millennium Advisors LLC | 0.01% | Add +944.4% | 75,239 | $3.9M |
| First Trust Advisors LP | 0.00% | Add +2232.7% | 71,661 | $3.7M |
| New York State Common Retirement Fund | 0.01% | Add +3.1% | 70,885 | $3.7M |
| Rhumbline Advisers | 0.00% | Add +3.0% | 67,907 | $3.5M |
| Barclays PLC | 0.00% | Reduce -21.0% | 67,641 | $3.5M |
| Nomura Asset Management International Inc. | 0.01% | Add +28.8% | 67,280 | $3.5M |
| Squarepoint Ops LLC | 0.01% | Add +879.4% | 66,814 | $3.4M |
| Qube Research & Technologies Ltd | 0.00% | New | 66,184 | $3.4M |
| Victory Capital Management Inc. | 0.00% | Add +467.6% | 64,260 | $3.3M |
| Legal & General Group Plc | 0.00% | Reduce -11.7% | 61,583 | $3.2M |
| Bank of Nova Scotia | 0.01% | Add +49.8% | 60,000 | $3.1M |
| Swiss National Bank | 0.00% | No change | 55,500 | $2.9M |
| Man Group plc | 0.01% | Add +31.5% | 54,488 | $2.8M |
| Algert Global LLC | 0.04% | Add +14.3% | 52,860 | $2.7M |
| Intech Investment Management LLC | 0.03% | Add +747.3% | 52,702 | $2.7M |
| JPMorgan Chase & Co. | 0.00% | Add +18.1% | 53,615 | $2.7M |
| Bullseye Asset Management LLC | 1.53% | Add +41.5% | 51,128 | $2.6M |
| Franklin Resources Inc. | 0.00% | Reduce -81.3% | 43,227 | $2.2M |
| Sei Investments Co. | 0.00% | Reduce -17.4% | 42,100 | $2.2M |
| Nordea Investment Management AB | 0.00% | Add +254.9% | 40,420 | $2.1M |
| FMR LLC | 0.00% | Reduce -72.3% | 37,984 | $2.0M |
| Empowered Funds, LLC | 0.01% | New | 34,876 | $1.8M |
| California State Teachers Retirement System | 0.00% | Add +31.6% | 34,473 | $1.8M |
| Voleon Capital Management LP | 0.04% | Reduce -47.9% | 33,122 | $1.7M |
| Axq Capital, LP | 0.22% | New | 33,014 | $1.7M |
| XTX Topco Ltd | 0.03% | Reduce -29.1% | 32,483 | $1.7M |
| Citigroup Inc. | 0.00% | Reduce -8.8% | 31,606 | $1.6M |
| Zacks Investment Management | 0.01% | New | 30,021 | $1.5M |
| Engineers Gate Manager LP | 0.02% | Add +54.0% | 29,567 | $1.5M |
"% of holder's portfolio" is INSP's weight in each manager's 13F, not the share of Inspire Medical Systems Inc. the manager owns.