INSPIRE MED SYS INC INSP
COM · Common Stock · CUSIP 457730109 · ISIN US4577301090
Company in Maple Grove, United States
- SectorHealth care
- IndustrySurgical & Medical Instruments & Apparatus
- HeadquartersGolden Valley, MN
- Founded2007
- Websiteinspiresleep.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($4.0m this quarter). Holder counts are more reliable. Shares outstanding: 29.7m as of 2024-05-01, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $214.87. Options: 20 managers hold calls ($130.1m notional), 26 hold puts ($162.8m).
Trends to Q1 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 302 |
| Q4 2022 | 339 |
| Q1 2023 | 373 |
| Q2 2023 | 408 |
| Q3 2023 | 366 |
| Q4 2023 | 343 |
| Q1 2024 | 327 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 185 | 137 |
| Q1 2023 | 217 | 129 |
| Q2 2023 | 209 | 192 |
| Q3 2023 | 192 | 209 |
| Q4 2023 | 171 | 202 |
| Q1 2024 | 165 | 162 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2023 | $76.8m | $73.3m | 0.95 |
| Q3 2023 | $68.4m | $140.9m | 2.06 |
| Q4 2023 | $80.1m | $112.5m | 1.40 |
| Q1 2024 | $130.1m | $162.8m | 1.25 |
Biggest buyers
| FMR LLC | Added | +1.2m |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +522.4k |
| AMERICAN CENTURY COMPANIES INC | Added | +335.1k |
| Artisan Partners Limited Partnership | New | +301.2k |
| BAILLIE GIFFORD & CO | Added | +237.7k |
| Bank of New York Mellon Corp | Added | +197.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +156.9k |
| Ensign Peak Advisors, Inc | Added | +92.9k |
| BlackRock Inc. | Added | +90.8k |
| CITADEL ADVISORS LLC | Added | +88.7k |
Biggest sellers
| Slate Path Capital LP | Sold out | -294.0k |
| MARSHALL WACE, LLP | Sold out | -247.6k |
| FARALLON CAPITAL MANAGEMENT, L.L.C. | Reduced | -228.2k |
| Point72 Asset Management, L.P. | Reduced | -210.9k |
| FRANKLIN RESOURCES INC | Reduced | -204.1k |
| FRED ALGER MANAGEMENT, LLC | Reduced | -183.3k |
| D. E. Shaw & Co., Inc. | Reduced | -153.5k |
| Iron Triangle Partners LP | Sold out | -150.0k |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC | Reduced | -148.9k |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | Sold out | -141.8k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $23.9m111.3k shares |
| CITADEL ADVISORS LLC | Added | $22.5m104.9k shares |
| JANE STREET GROUP, LLC | Added | $14.6m67.8k shares |
| MILLENNIUM MANAGEMENT LLC | Added | $13.3m62.1k shares |
| Squarepoint Ops LLC | Added | $11.9m55.5k shares |
| SIMPLEX TRADING, LLC | Added | $9.4m43.6k shares |
| Point72 Asset Management, L.P. | New | $8.6m40.0k shares |
| Caption Management, LLC | New | $5.5m25.8k shares |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | $4.8m22.4k shares |
| WOLVERINE TRADING, LLC | Added | $3.4m16.0k shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $25.6m119.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $22.8m106.2k shares |
| MILLENNIUM MANAGEMENT LLC | Reduced | $15.2m70.7k shares |
| Caption Management, LLC | New | $14.3m66.7k shares |
| D. E. Shaw & Co., Inc. | Reduced | $12.9m60.1k shares |
| Squarepoint Ops LLC | New | $12.8m59.6k shares |
| SIMPLEX TRADING, LLC | Added | $11.3m52.6k shares |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | $9.7m45.2k shares |
| FIRST SABREPOINT CAPITAL MANAGEMENT LP | New | $6.9m32.0k shares |
| Walleye Trading LLC | Added | $4.5m21.1k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution +3.1 pts · filed 2026-07-28 | 14.4% |
| WELLINGTON MANAGEMENT GROUP LLP 13G · institution +1.2 pts · filed 2026-05-15 | 8.8% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution +1.7 pts · filed 2026-07-31 | 7.4% |
| Soleus Capital Master Fund, L.P. 13G · passive investor +1.6 pts · filed 2026-08-13 | 6.7% |
| AQR CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-08-12 | 6.4% |
| D. E. SHAW & CO, L.P. 13G · passive investor new · filed 2026-07-02 | 5.1% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 5.1% |
Fell to 5% or below in the last year: Flynn James E (4.5%, 2026-05-14), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), CITADEL ADVISORS LLC (1.8%, 2026-02-17), Dragoneer Investment Group, LLC (0.0%, 2025-11-14)
Insider purchases and sales in Q1 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2022 | 0 | — | 2 | $6.6m | — |
| Q3 2022 | 0 | — | 0 | — | — |
| Q4 2022 | 0 | — | 4 | $10.8m | — |
| Q1 2023 | 0 | — | 5 | $21.8m | — |
| Q2 2023 | 0 | — | 2 | $5.3m | $4.9m |
| Q3 2023 | 0 | — | 2 | $822.5k | $822.5k |
| Q4 2023 | 1 | $15.3k | 0 | — | — |
| Q1 2024 | 0 | — | 3 | $5.6m | $2.8m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-03-25 | Griffin Jerry C Director | Sold plan | $109.6k554 shares |
| 2024-03-22 | Rondoni John Chief Technology Officer | Sold plan | $852.8k4.4k shares |
| 2024-03-18 | Griffin Jerry C Director | Sold plan | $107.2k554 shares |
| 2024-03-11 | Griffin Jerry C Director | Sold plan | $109.7k554 shares |
| 2024-03-01 | Griffin Jerry C Director | Sold plan | $99.4k554 shares |
| 2024-02-29 | Rondoni John Chief Technology Officer | Sold plan | $1.5m8.6k shares |
| 2024-02-27 | Ban Randy Chief Commercial Officer | Sold | $557.0k3.1k shares |
| 2024-02-23 | Ban Randy Chief Commercial Officer | Sold | $2.3m12.2k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q1 2024
| Manager | Shares | Change |
|---|---|---|
| FMR LLC 0.06% of their portfolio | 4.4m $953.2m | Added +1.2m |
| VANGUARD GROUP INC 0.01% of their portfolio | 2.9m $621.3m | Reduced -39.1k |
| WELLINGTON MANAGEMENT GROUP LLP 0.07% of their portfolio | 2.0m $419.4m | Added +522.4k |
| BlackRock Inc. 0.01% of their portfolio | 1.9m $406.2m | Added +90.8k |
| BAILLIE GIFFORD & CO 0.25% of their portfolio | 1.5m $315.2m | Added +237.7k |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 1.2m $265.5m | Reduced -27.5k |
| WASATCH ADVISORS LP 1.24% of their portfolio | 1.1m $236.9m | Added +5.5k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.42% of their portfolio | 756.8k $162.6m | Reduced -50.1k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 1.37% of their portfolio | 684.7k $147.1m | Reduced -57.3k |
| Champlain Investment Partners, LLC 0.79% of their portfolio | 641.7k $137.8m | Reduced -6.9k |
| FARALLON CAPITAL MANAGEMENT, L.L.C. 0.79% of their portfolio | 626.9k $134.6m | Reduced -228.2k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 595.6k $127.9m | Added +197.1k |
| MACQUARIE GROUP LTD 0.14% of their portfolio | 558.5k $120.0m | Added +19.9k |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.61% of their portfolio | 538.3k $115.6m | Reduced -7.3k |
| STATE STREET CORP 0.01% of their portfolio | 530.2k $113.9m | Reduced -993 |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 462.3k $99.3m | Added +17.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 459.8k $98.8m | Added +156.9k |
| FEDERATED HERMES, INC. 0.22% of their portfolio | 453.2k $97.3m | Reduced -68 |
| AMERIPRISE FINANCIAL INC 0.03% of their portfolio | 431.4k $92.7m | Reduced -59.8k |
| Eversept Partners, LP 6.75% of their portfolio | 420.7k $90.4m | Added +69.6k |
| MORGAN STANLEY 0.00% of their portfolio | 409.7k $88.0m | Added +62.6k |
| AMERICAN CENTURY COMPANIES INC 0.05% of their portfolio | 338.4k $72.7m | Added +335.1k |
| FRANKLIN RESOURCES INC 0.02% of their portfolio | 309.9k $66.6m | Reduced -204.1k |
| Artisan Partners Limited Partnership 0.09% of their portfolio | 301.2k $64.7m | New |
| CREDIT SUISSE AG/ 0.06% of their portfolio | 297.1k $63.8m | Reduced -59.0k |
| NORGES BANK 0.01% of their portfolio | 274.5k $59.0m | Added +33.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 268.9k $57.8m | Added +4.9k |
| Point72 Asset Management, L.P. 0.16% of their portfolio | 262.3k $56.3m | Reduced -210.9k |
| JENNISON ASSOCIATES LLC 0.04% of their portfolio | 257.9k $55.4m | Reduced -47.0k |
| GILDER GAGNON HOWE & CO LLC 0.67% of their portfolio | 250.7k $53.9m | Reduced -5.2k |
| VOYA INVESTMENT MANAGEMENT LLC 0.05% of their portfolio | 225.7k $48.5m | Added +63.4k |
| FRED ALGER MANAGEMENT, LLC 0.24% of their portfolio | 222.6k $47.8m | Reduced -183.3k |
| Bellevue Group AG 0.71% of their portfolio | 217.7k $46.8m | Added +2.1k |
| BAMCO INC /NY/ 0.12% of their portfolio | 210.0k $45.1m | Reduced -1.0k |
| KEYBANK NATIONAL ASSOCIATION/OH 0.18% of their portfolio | 201.7k $43.3m | Added +332 |
| Hood River Capital Management LLC 0.91% of their portfolio | 189.2k $40.6m | Added +32.8k |
| Allspring Global Investments Holdings, LLC 0.06% of their portfolio | 166.6k $35.8m | Reduced -53.2k |
| Ensign Peak Advisors, Inc 0.06% of their portfolio | 163.6k $35.1m | Added +92.9k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 154.4k $33.2m | Reduced -839 |
| Driehaus Capital Management LLC 0.31% of their portfolio | 142.9k $30.7m | Reduced -59.1k |
| First Light Asset Management, LLC 2.30% of their portfolio | 140.0k $30.1m | Added +51.4k |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 135.0k $29.0m | Added +36.5k |
| Rock Springs Capital Management LP 0.71% of their portfolio | 130.5k $28.0m | Added +31.5k |
| Degroof Petercam Asset Management 0.34% of their portfolio | 130.0k $27.9m | Added +20.0k |
| Atika Capital Management LLC 3.13% of their portfolio | 129.7k $27.9m | Added +8.1k |
| EVENTIDE ASSET MANAGEMENT, LLC 0.42% of their portfolio | 125.1k $26.9m | Unchanged |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.05% of their portfolio | 125.0k $26.8m | Reduced -84.9k |
| Eagle Health Investments LP 5.00% of their portfolio | 122.2k $26.2m | Added +8.7k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 120.6k $25.9m | Added +51.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.04% of their portfolio | 109.6k $23.5m | Reduced -4.0k |
| Thrivent Financial for Lutherans 0.05% of their portfolio | 105.0k $22.6m | Reduced -3.9k |
| VICTORY CAPITAL MANAGEMENT INC 0.02% of their portfolio | 105.0k $22.5m | Reduced -37.9k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 102.7k $22.1m | Added +67.7k |
| Susquehanna Portfolio Strategies, LLC 0.51% of their portfolio | 101.6k $21.8m | Unchanged |
| BRAIDWELL LP 0.70% of their portfolio | 101.5k $21.8m | Reduced -83.2k |
| Mitsubishi UFJ Trust & Banking Corp 0.05% of their portfolio | 100.9k $21.7m | Reduced -9.1k |
| SEI INVESTMENTS CO 0.03% of their portfolio | 93.7k $20.1m | Added +8.3k |
| CITADEL ADVISORS LLC 0.02% of their portfolio | 93.0k $20.0m | Added +88.7k |
| Connor, Clark & Lunn Investment Management Ltd. 0.09% of their portfolio | 92.4k $19.9m | Added +13.9k |
| AQR CAPITAL MANAGEMENT LLC 0.03% of their portfolio | 91.8k $19.7m | Added +28.3k |
| Amundi 0.01% of their portfolio | 84.6k $20.4m | Added +26.9k |
| Parkman Healthcare Partners LLC 2.14% of their portfolio | 81.2k $17.4m | Reduced -22.6k |
| ExodusPoint Capital Management, LP 0.21% of their portfolio | 79.5k $17.1m | Reduced -9.3k |
| Rheos Capital Works Inc. 0.82% of their portfolio | 79.4k $17.1m | Added +16.3k |
| COMERICA BANK 0.07% of their portfolio | 79.0k $17.0m | Added +8.5k |
| BROWN CAPITAL MANAGEMENT LLC 0.30% of their portfolio | 78.4k $16.8m | New |
| Balyasny Asset Management L.P. 0.04% of their portfolio | 77.0k $16.5m | Reduced -23.9k |
| KORNITZER CAPITAL MANAGEMENT INC /KS 0.28% of their portfolio | 70.9k $15.2m | Reduced -1.2k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.02% of their portfolio | 70.2k $15.1m | Added +48.3k |
| NOVO HOLDINGS A/S 0.97% of their portfolio | 65.5k $14.1m | Unchanged |
| NOMURA ASSET MANAGEMENT CO LTD 0.05% of their portfolio | 64.9k $13.9m | Added +4.7k |
| LAZARD ASSET MANAGEMENT LLC 0.02% of their portfolio | 63.2k $13.6m | Added +29.0k |
| Schonfeld Strategic Advisors LLC 0.11% of their portfolio | 63.1k $13.6m | Reduced -44.2k |
| NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio | 62.6k $13.4m | Added +11.7k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.01% of their portfolio | 61.6k $13.2m | Reduced -8.4k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 61.0k $13.1m | Added +38.3k |
| MAIRS & POWER INC 0.12% of their portfolio | 59.2k $12.7m | Reduced -5.4k |
| Swiss National Bank 0.01% of their portfolio | 58.3k $12.5m | Added +500 |
| STATE OF WISCONSIN INVESTMENT BOARD 0.03% of their portfolio | 55.6k $11.9m | Reduced -6.8k |
| Stanley-Laman Group, Ltd. 1.52% of their portfolio | 50.4k $10.8m | Reduced -639 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 47.1k $10.1m | Reduced -55.8k |
| Aberdeen Group plc 0.02% of their portfolio | 46.0k $9.9m | Unchanged |
| CAPITAL FUND MANAGEMENT S.A. 0.12% of their portfolio | 45.4k $9.8m | Added +3.9k |
| Rhenman & Partners Asset Management AB 0.86% of their portfolio | 42.0k $9.0m | Added +24.0k |
| Kopp LeRoy C 5.04% of their portfolio | 41.1k $8.8m | First filing |
| Kopp Family Office, LLC 5.04% of their portfolio | 41.1k $8.8m | Added +7.8k |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.08% of their portfolio | 40.5k $8.7m | Added +8.6k |
| Man Group plc 0.02% of their portfolio | 40.4k $8.7m | Reduced -106 |
| California Public Employees Retirement System 0.01% of their portfolio | 40.3k $8.7m | Unchanged |
| Invesco Ltd. 0.00% of their portfolio | 39.4k $8.5m | Added +2.2k |
| HSBC HOLDINGS PLC 0.01% of their portfolio | 37.3k $8.0m | Added +16.1k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 35.6k $7.6m | Reduced -3.2k |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC 0.62% of their portfolio | 33.9k $7.3m | Reduced -148.9k |
| LMCG INVESTMENTS, LLC 0.43% of their portfolio | 33.9k $7.3m | New |
| ARMISTICE CAPITAL, LLC 0.19% of their portfolio | 33.8k $7.3m | Reduced -2.8k |
| OSTERWEIS CAPITAL MANAGEMENT INC 0.42% of their portfolio | 33.7k $7.2m | Added +4.7k |
| PFM Health Sciences, LP 0.36% of their portfolio | 33.6k $7.2m | New |
| Integral Health Asset Management, LLC 0.70% of their portfolio | 33.0k $7.1m | Reduced -27.0k |
| NEXT CENTURY GROWTH INVESTORS LLC 0.61% of their portfolio | 32.5k $7.0m | Added +1.1k |
| UBS Group AG 0.00% of their portfolio | 32.2k $6.9m | Reduced -986 |