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 ($17.7m this quarter). Holder counts are more reliable. Shares outstanding: 28.9m as of 2022-10-25, 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 ≈ $177.47. Options: 16 managers hold calls ($119.8m notional), 16 hold puts ($40.8m).
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | — | $42.1m237.4k shares |
| JANE STREET GROUP, LLC | — | $29.6m166.8k shares |
| Walleye Trading LLC | — | $13.0m73.1k shares |
| CITADEL ADVISORS LLC | — | $10.8m61.0k shares |
| Caption Management, LLC | — | $7.0m39.3k shares |
| MILLENNIUM MANAGEMENT LLC | — | $4.6m26.0k shares |
| SIMPLEX TRADING, LLC | — | $3.0m17.1k shares |
| PEAK6 Investments LLC | — | $3.0m16.9k shares |
| D. E. Shaw & Co., Inc. | — | $1.9m10.6k shares |
| K2 PRINCIPAL FUND, L.P. | — | $1.6m9.0k shares |
Biggest puts
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | — | $12.9m73.0k shares |
| JANE STREET GROUP, LLC | — | $8.3m46.9k shares |
| CITADEL ADVISORS LLC | — | $5.8m32.5k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | — | $3.5m19.6k shares |
| K2 PRINCIPAL FUND, L.P. | — | $3.3m18.4k shares |
| MILLENNIUM MANAGEMENT LLC | — | $2.5m14.0k shares |
| WOLVERINE TRADING, LLC | — | $1.2m6.6k shares |
| Walleye Trading LLC | — | $940.0k5.3k shares |
| SIMPLEX TRADING, LLC | — | $869.0k4.9k shares |
| TUDOR INVESTMENT CORP ET AL | — | $409.0k2.3k 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 Q3 2022
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 |
|---|---|---|---|---|---|
| Q4 2020 | 0 | — | 0 | — | — |
| Q1 2021 | 0 | — | 0 | — | — |
| Q2 2021 | 0 | — | 0 | — | — |
| Q3 2021 | 0 | — | 0 | — | — |
| Q4 2021 | 0 | — | 2 | $7.7m | — |
| Q1 2022 | 0 | — | 3 | $35.2m | — |
| Q2 2022 | 0 | — | 2 | $6.6m | — |
| Q3 2022 | 0 | — | 0 | — | — |
None reported in Q3 2022.
Holders, Q3 2022
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.01% of their portfolio | 2.9m $507.9m | — |
| BlackRock Inc. 0.01% of their portfolio | 2.0m $355.8m | — |
| FMR LLC 0.03% of their portfolio | 1.5m $271.1m | — |
| MACQUARIE GROUP LTD 0.31% of their portfolio | 1.4m $249.8m | — |
| FRANKLIN RESOURCES INC 0.10% of their portfolio | 1.1m $190.7m | — |
| Champlain Investment Partners, LLC 0.84% of their portfolio | 690.2k $122.4m | — |
| Invesco Ltd. 0.04% of their portfolio | 661.7k $117.4m | — |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.46% of their portfolio | 658.6k $116.8m | — |
| VIKING GLOBAL INVESTORS LP 0.52% of their portfolio | 633.6k $112.4m | — |
| WASATCH ADVISORS LP 0.75% of their portfolio | 605.4k $107.4m | — |
| GILDER GAGNON HOWE & CO LLC 1.86% of their portfolio | 601.5k $106.7m | — |
| STATE STREET CORP 0.01% of their portfolio | 585.8k $103.9m | — |
| WELLINGTON MANAGEMENT GROUP LLP 0.02% of their portfolio | 557.2k $98.8m | — |
| CITADEL ADVISORS LLC 0.12% of their portfolio | 549.5k $97.5m | — |
| LORD, ABBETT & CO. LLC 0.33% of their portfolio | 511.4k $90.7m | — |
| Point72 Asset Management, L.P. 0.38% of their portfolio | 488.7k $86.7m | — |
| CREDIT SUISSE AG/ 0.10% of their portfolio | 486.0k $86.2m | — |
| FARALLON CAPITAL MANAGEMENT, L.L.C. 0.52% of their portfolio | 482.0k $85.5m | — |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 479.8k $85.1m | — |
| Allspring Global Investments Holdings, LLC 0.15% of their portfolio | 471.6k $83.6m | — |
| FRED ALGER MANAGEMENT, LLC 0.41% of their portfolio | 459.6k $81.5m | — |
| Bellevue Group AG 1.02% of their portfolio | 401.8k $71.3m | — |
| MARSHALL WACE, LLP 0.16% of their portfolio | 364.4k $64.6m | — |
| NORTHERN TRUST CORP 0.01% of their portfolio | 312.2k $55.4m | — |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.43% of their portfolio | 306.3k $54.3m | — |
| BAMCO INC /NY/ 0.17% of their portfolio | 293.3k $52.0m | — |
| Bank of New York Mellon Corp 0.01% of their portfolio | 292.1k $51.8m | — |
| LOOMIS SAYLES & CO L P 0.10% of their portfolio | 291.1k $51.6m | — |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 287.8k $51.1m | — |
| VICTORY CAPITAL MANAGEMENT INC 0.06% of their portfolio | 284.2k $50.4m | — |
| AMERIPRISE FINANCIAL INC 0.02% of their portfolio | 268.7k $47.7m | — |
| Driehaus Capital Management LLC 0.72% of their portfolio | 268.1k $47.6m | — |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 264.7k $46.9m | — |
| NORGES BANK 0.01% of their portfolio | 247.3k $43.9m | — |
| FEDERATED HERMES, INC. 0.12% of their portfolio | 240.0k $42.6m | — |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 235.7k $41.8m | — |
| TimesSquare Capital Management, LLC 0.57% of their portfolio | 232.5k $41.2m | — |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 3.12% of their portfolio | 212.6k $37.7m | — |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.43% of their portfolio | 206.6k $36.6m | — |
| PURA VIDA INVESTMENTS, LLC 5.39% of their portfolio | 201.6k $35.8m | — |
| JENNISON ASSOCIATES LLC 0.03% of their portfolio | 172.7k $30.6m | — |
| KEYBANK NATIONAL ASSOCIATION/OH 0.15% of their portfolio | 162.4k $28.8m | — |
| Atika Capital Management LLC 3.08% of their portfolio | 153.5k $27.2m | — |
| Holocene Advisors, LP 0.16% of their portfolio | 142.5k $25.3m | — |
| Artisan Partners Limited Partnership 0.04% of their portfolio | 133.6k $23.7m | — |
| MAIRS & POWER INC 0.30% of their portfolio | 132.0k $23.4m | — |
| Granite Investment Partners, LLC 1.00% of their portfolio | 130.1k $23.1m | — |
| Amundi 0.01% of their portfolio | 128.0k $24.2m | — |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 122.2k $21.7m | — |
| MORGAN STANLEY 0.00% of their portfolio | 117.1k $20.8m | — |
| EAGLE ASSET MANAGEMENT INC 0.13% of their portfolio | 114.4k $20.3m | — |
| Thrivent Financial for Lutherans 0.05% of their portfolio | 112.0k $19.9m | — |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 108.9k $19.3m | — |
| Polar Asset Management Partners Inc. 0.25% of their portfolio | 108.0k $19.2m | — |
| SEI INVESTMENTS CO 0.04% of their portfolio | 107.1k $19.0m | — |
| Eagle Health Investments LP 4.09% of their portfolio | 100.6k $17.8m | — |
| Iron Triangle Partners LP 3.10% of their portfolio | 100.0k $17.7m | — |
| MOORE CAPITAL MANAGEMENT, LP 0.48% of their portfolio | 99.0k $17.6m | — |
| D. E. Shaw & Co., Inc. 0.03% of their portfolio | 96.8k $17.2m | — |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 91.0k $16.1m | — |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.13% of their portfolio | 89.2k $15.8m | — |
| LAZARD ASSET MANAGEMENT LLC 0.02% of their portfolio | 85.6k $15.2m | — |
| EVENTIDE ASSET MANAGEMENT, LLC 0.29% of their portfolio | 84.0k $14.9m | — |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 82.8k $14.7m | — |
| Nicholas Investment Partners, LP 1.12% of their portfolio | 68.2k $12.1m | — |
| Soleus Capital Management, L.P. 1.62% of their portfolio | 67.4k $12.0m | — |
| Swiss National Bank 0.01% of their portfolio | 65.4k $11.6m | — |
| LMR Partners LLP 0.24% of their portfolio | 65.0k $11.5m | — |
| Rhenman & Partners Asset Management AB 1.29% of their portfolio | 63.0k $12.3m | — |
| NOVO HOLDINGS A/S 0.52% of their portfolio | 60.9k $10.8m | — |
| California Public Employees Retirement System 0.01% of their portfolio | 59.1k $10.5m | — |
| Cubist Systematic Strategies, LLC 0.08% of their portfolio | 58.7k $10.4m | — |
| SEGALL BRYANT & HAMILL, LLC 0.11% of their portfolio | 52.1k $9.2m | — |
| Bridgewater Associates, LP 0.04% of their portfolio | 44.9k $8.0m | — |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 44.4k $7.9m | — |
| Squarepoint Ops LLC 0.07% of their portfolio | 43.8k $7.8m | — |
| SECTORAL ASSET MANAGEMENT INC 1.46% of their portfolio | 41.8k $7.4m | — |
| Integral Health Asset Management, LLC 1.44% of their portfolio | 40.0k $7.1m | — |
| HealthCor Management, L.P. 0.85% of their portfolio | 38.2k $6.8m | — |
| KORNITZER CAPITAL MANAGEMENT INC /KS 0.14% of their portfolio | 37.2k $6.6m | — |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 36.6k $6.5m | — |
| STATE OF WISCONSIN INVESTMENT BOARD 0.02% of their portfolio | 35.6k $6.3m | — |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 35.4k $6.3m | — |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 34.9k $6.2m | — |
| Lisanti Capital Growth, LLC 0.81% of their portfolio | 34.2k $6.1m | — |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 34.1k $6.1m | — |
| OAK RIDGE INVESTMENTS LLC 0.91% of their portfolio | 33.7k $6.0m | — |
| CASTLEARK MANAGEMENT LLC 0.33% of their portfolio | 33.1k $5.9m | — |
| Legal & General Group Plc 0.00% of their portfolio | 32.6k $5.8m | — |
| NEXT CENTURY GROWTH INVESTORS LLC 0.69% of their portfolio | 31.8k $5.6m | — |
| STRS OHIO 0.03% of their portfolio | 30.5k $5.4m | — |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 30.1k $5.3m | — |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 28.7k $5.1m | — |
| Miura Global Management, LLC 2.88% of their portfolio | 27.1k $4.8m | — |
| OSTERWEIS CAPITAL MANAGEMENT INC 0.35% of their portfolio | 26.2k $4.6m | — |
| COMERICA BANK 0.04% of their portfolio | 26.0k $4.5m | — |
| Tri Locum Partners LP 1.18% of their portfolio | 23.4k $4.2m | — |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.02% of their portfolio | 21.9k $3.9m | — |
| KINGDON CAPITAL MANAGEMENT, L.L.C. 1.15% of their portfolio | 21.0k $3.7m | — |
| HSBC HOLDINGS PLC 0.01% of their portfolio | 20.8k $3.7m | — |