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 ($27.8m this quarter). Holder counts are more reliable. Shares outstanding: 29.0m as of 2023-02-03, 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 ≈ $251.84. Options: 15 managers hold calls ($99.7m notional), 13 hold puts ($39.8m).
Trends to Q4 2022
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 302 |
| Q4 2022 | 339 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2022 | $119.8m | $40.8m | 0.34 |
| Q4 2022 | $99.7m | $39.8m | 0.40 |
Biggest buyers
| LORD, ABBETT & CO. LLC | Added | +367.7k |
| Assenagon Asset Management S.A. | New | +339.6k |
| MILLENNIUM MANAGEMENT LLC | Added | +205.8k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Added | +174.8k |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Added | +151.5k |
| BlackRock Inc. | Added | +129.9k |
| VANGUARD GROUP INC | Added | +114.7k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | New | +100.0k |
| PRINCIPAL FINANCIAL GROUP INC | Added | +98.4k |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | Added | +86.5k |
Biggest sellers
| MACQUARIE GROUP LTD | Reduced | -347.2k |
| FMR LLC | Reduced | -251.4k |
| FARALLON CAPITAL MANAGEMENT, L.L.C. | Reduced | -239.4k |
| CREDIT SUISSE AG/ | Reduced | -163.6k |
| MARSHALL WACE, LLP | Reduced | -158.5k |
| Holocene Advisors, LP | Sold out | -142.5k |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | -95.1k |
| SEI INVESTMENTS CO | Reduced | -84.2k |
| VIKING GLOBAL INVESTORS LP | Reduced | -83.8k |
| TimesSquare Capital Management, LLC | Reduced | -81.7k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $42.9m170.2k shares |
| CITADEL ADVISORS LLC | Added | $25.8m102.6k shares |
| Caption Management, LLC | Added | $19.3m76.8k shares |
| GROUP ONE TRADING LLC | New | $4.4m17.4k shares |
| PEAK6 Investments LLC | Reduced | $1.6m6.3k shares |
| JANE STREET GROUP, LLC | Reduced | $1.6m6.2k shares |
| MILLENNIUM MANAGEMENT LLC | Reduced | $1.3m5.0k shares |
| Walleye Trading LLC | Reduced | $856.4k3.4k shares |
| Cutler Group LLC / CA | New | $562.0k6.0k shares |
| Squarepoint Ops LLC | Unchanged | $554.1k2.2k shares |
Biggest puts
| Caption Management, LLC | New | $19.3m76.8k shares |
| CITADEL ADVISORS LLC | Added | $11.8m46.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.1m24.4k shares |
| SIMPLEX TRADING, LLC | Reduced | $730.0k2.9k shares |
| JANE STREET GROUP, LLC | Reduced | $302.3k1.2k shares |
| TWO SIGMA SECURITIES, LLC | Reduced | $277.1k1.1k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $275.0k1.1k shares |
| Paloma Partners Management Co | New | $251.9k1.0k shares |
| Squarepoint Ops LLC | New | $226.7k900 shares |
| Walleye Trading LLC | Reduced | $201.5k800 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 Q4 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 |
|---|---|---|---|---|---|
| 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 | — | — |
| Q4 2022 | 0 | — | 4 | $10.8m | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2022-12-19 | Rondoni John Chief Technology Officer | Sold | $170.7k678 shares |
| 2022-12-16 | NELSON MARILYN C Director · See Footnote | Sold | $6.2m25.2k shares |
| 2022-12-05 | Ban Randy Chief Commercial Officer | Sold | $2.4m10.3k shares |
| 2022-11-11 | Griffin Jerry C Director | Sold | $2.0m9.2k 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, Q4 2022
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.02% of their portfolio | 3.0m $750.2m | Added +114.7k |
| BlackRock Inc. 0.02% of their portfolio | 2.1m $538.0m | Added +129.9k |
| FMR LLC 0.03% of their portfolio | 1.3m $321.7m | Reduced -251.4k |
| FRANKLIN RESOURCES INC 0.14% of their portfolio | 1.1m $270.6m | Reduced -1.0k |
| MACQUARIE GROUP LTD 0.32% of their portfolio | 1.1m $267.2m | Reduced -347.2k |
| LORD, ABBETT & CO. LLC 0.40% of their portfolio | 879.1k $221.4m | Added +367.7k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.80% of their portfolio | 833.4k $209.9m | Added +174.8k |
| Invesco Ltd. 0.05% of their portfolio | 676.0k $170.3m | Added +14.3k |
| Champlain Investment Partners, LLC 1.08% of their portfolio | 668.3k $168.3m | Reduced -21.9k |
| CITADEL ADVISORS LLC 0.18% of their portfolio | 632.3k $159.3m | Added +82.9k |
| WELLINGTON MANAGEMENT GROUP LLP 0.03% of their portfolio | 617.3k $155.5m | Added +60.2k |
| STATE STREET CORP 0.01% of their portfolio | 600.8k $151.3m | Added +15.0k |
| VIKING GLOBAL INVESTORS LP 0.69% of their portfolio | 549.8k $138.5m | Reduced -83.8k |
| WASATCH ADVISORS LP 0.93% of their portfolio | 548.1k $138.1m | Reduced -57.3k |
| GILDER GAGNON HOWE & CO LLC 2.52% of their portfolio | 536.8k $135.2m | Reduced -64.7k |
| FRED ALGER MANAGEMENT, LLC 0.70% of their portfolio | 510.1k $128.5m | Added +50.5k |
| GEODE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio | 506.4k $127.5m | Added +26.6k |
| Point72 Asset Management, L.P. 0.39% of their portfolio | 412.9k $104.0m | Reduced -75.7k |
| Allspring Global Investments Holdings, LLC 0.17% of their portfolio | 405.7k $102.2m | Reduced -65.8k |
| Bellevue Group AG 1.34% of their portfolio | 401.7k $101.2m | Reduced -26 |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.98% of their portfolio | 358.0k $90.2m | Added +151.5k |
| Assenagon Asset Management S.A. 0.35% of their portfolio | 339.6k $85.5m | New |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.66% of their portfolio | 339.3k $85.5m | Added +33.1k |
| AMERIPRISE FINANCIAL INC 0.03% of their portfolio | 337.4k $85.0m | Added +68.7k |
| CREDIT SUISSE AG/ 0.09% of their portfolio | 322.5k $81.2m | Reduced -163.6k |
| NORTHERN TRUST CORP 0.02% of their portfolio | 318.2k $80.2m | Added +6.0k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 307.1k $77.3m | Added +19.2k |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 5.50% of their portfolio | 299.1k $75.3m | Added +86.5k |
| Driehaus Capital Management LLC 1.12% of their portfolio | 297.5k $74.9m | Added +29.3k |
| BAMCO INC /NY/ 0.25% of their portfolio | 293.3k $73.9m | Unchanged |
| LOOMIS SAYLES & CO L P 0.14% of their portfolio | 284.4k $71.6m | Reduced -6.8k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 278.3k $70.1m | Reduced -13.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 268.7k $67.7m | Added +4.1k |
| NORGES BANK 0.02% of their portfolio | 261.7k $65.9m | Added +14.4k |
| FARALLON CAPITAL MANAGEMENT, L.L.C. 0.39% of their portfolio | 242.6k $61.1m | Reduced -239.4k |
| FEDERATED HERMES, INC. 0.17% of their portfolio | 240.0k $60.5m | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.06% of their portfolio | 215.1k $54.2m | Added +205.8k |
| MARSHALL WACE, LLP 0.13% of their portfolio | 205.9k $51.9m | Reduced -158.5k |
| PURA VIDA INVESTMENTS, LLC 8.49% of their portfolio | 201.0k $50.6m | Reduced -600 |
| VICTORY CAPITAL MANAGEMENT INC 0.05% of their portfolio | 189.1k $47.6m | Reduced -95.1k |
| JENNISON ASSOCIATES LLC 0.04% of their portfolio | 168.7k $42.5m | Reduced -4.0k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 167.7k $42.2m | Reduced -68.0k |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 165.1k $41.6m | Added +42.8k |
| KEYBANK NATIONAL ASSOCIATION/OH 0.20% of their portfolio | 162.3k $40.9m | Reduced -49 |
| Thrivent Financial for Lutherans 0.10% of their portfolio | 158.7k $40.0m | Added +46.6k |
| TimesSquare Capital Management, LLC 0.54% of their portfolio | 150.8k $38.0m | Reduced -81.7k |
| Polar Asset Management Partners Inc. 0.52% of their portfolio | 143.8k $36.2m | Added +35.8k |
| Atika Capital Management LLC 5.42% of their portfolio | 140.9k $35.5m | Reduced -12.6k |
| D. E. Shaw & Co., Inc. 0.06% of their portfolio | 140.7k $35.4m | Added +43.9k |
| MORGAN STANLEY 0.00% of their portfolio | 130.8k $32.9m | Added +13.7k |
| Granite Investment Partners, LLC 1.34% of their portfolio | 127.6k $32.1m | Reduced -2.5k |
| MAIRS & POWER INC 0.38% of their portfolio | 125.6k $31.6m | Reduced -6.4k |
| Amundi 0.02% of their portfolio | 122.0k $29.8m | Reduced -6.0k |
| Artisan Partners Limited Partnership 0.05% of their portfolio | 113.4k $28.6m | Reduced -20.2k |
| EAGLE ASSET MANAGEMENT INC 0.17% of their portfolio | 111.0k $28.1m | Reduced -3.5k |
| EVENTIDE ASSET MANAGEMENT, LLC 0.54% of their portfolio | 108.2k $27.3m | Added +24.2k |
| PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio | 105.7k $26.6m | Added +98.4k |
| Eagle Health Investments LP 5.90% of their portfolio | 101.5k $25.6m | Added +990 |
| VOYA INVESTMENT MANAGEMENT LLC 0.03% of their portfolio | 101.5k $25.6m | Added +82.6k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.06% of their portfolio | 100.0k $25.2m | New |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 97.9k $24.7m | Reduced -11.0k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 92.1k $23.2m | Added +1.1k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 90.9k $22.9m | Added +8.1k |
| Nicholas Investment Partners, LP 1.80% of their portfolio | 81.7k $20.6m | Added +13.6k |
| Iron Triangle Partners LP 3.61% of their portfolio | 80.0k $20.2m | Reduced -20.0k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.13% of their portfolio | 75.9k $19.1m | Reduced -13.3k |
| Swiss National Bank 0.01% of their portfolio | 69.5k $17.5m | Added +4.1k |
| NOVO HOLDINGS A/S 1.00% of their portfolio | 63.3k $15.9m | Added +2.4k |
| Lisanti Capital Growth, LLC 2.10% of their portfolio | 61.0k $15.4m | Added +26.8k |
| Rhenman & Partners Asset Management AB 1.60% of their portfolio | 61.0k $15.4m | Reduced -2.0k |
| Integral Health Asset Management, LLC 3.41% of their portfolio | 60.0k $15.1m | Added +20.0k |
| California Public Employees Retirement System 0.01% of their portfolio | 55.1k $13.9m | Reduced -3.9k |
| Man Group plc 0.05% of their portfolio | 54.9k $13.8m | Added +51.5k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.02% of their portfolio | 51.3k $12.9m | Added +6.9k |
| KORNITZER CAPITAL MANAGEMENT INC /KS 0.26% of their portfolio | 50.2k $12.6m | Added +13.0k |
| Soleus Capital Management, L.P. 1.67% of their portfolio | 46.2k $11.6m | Reduced -21.2k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.02% of their portfolio | 41.2k $10.4m | Added +22.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 40.8k $10.3m | Added +24.3k |
| UBS Group AG 0.00% of their portfolio | 40.6k $10.2m | Added +24.7k |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 40.3k $10.2m | Added +10.2k |
| Cubist Systematic Strategies, LLC 0.09% of their portfolio | 39.6k $10.0m | Reduced -19.0k |
| CASTLEARK MANAGEMENT LLC 0.52% of their portfolio | 39.5k $9.9m | Added +6.3k |
| AXIOM INVESTORS LLC /DE 0.19% of their portfolio | 38.7k $9.7m | Added +19.2k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 38.4k $9.7m | Added +1.8k |
| SEGALL BRYANT & HAMILL, LLC 0.11% of their portfolio | 38.0k $9.6m | Reduced -14.1k |
| NEXT CENTURY GROWTH INVESTORS LLC 1.14% of their portfolio | 37.7k $9.5m | Added +5.8k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 37.6k $9.5m | Added +2.3k |
| LAZARD ASSET MANAGEMENT LLC 0.01% of their portfolio | 37.3k $9.4m | Reduced -48.2k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 36.3k $9.1m | Added +1.4k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 34.7k $8.7m | Added +600 |
| STATE OF WISCONSIN INVESTMENT BOARD 0.03% of their portfolio | 34.1k $8.6m | Reduced -1.6k |
| Bridgewater Associates, LP 0.05% of their portfolio | 33.6k $8.5m | Reduced -11.2k |
| Squarepoint Ops LLC 0.06% of their portfolio | 33.4k $8.4m | Reduced -10.4k |
| OAK RIDGE INVESTMENTS LLC 1.24% of their portfolio | 33.1k $8.3m | Reduced -558 |
| Legal & General Group Plc 0.00% of their portfolio | 32.9k $8.3m | Added +274 |
| STRS OHIO 0.04% of their portfolio | 32.1k $8.1m | Added +1.6k |
| OSTERWEIS CAPITAL MANAGEMENT INC 0.59% of their portfolio | 32.0k $8.1m | Added +5.8k |
| Miura Global Management, LLC 3.80% of their portfolio | 30.0k $7.6m | Added +2.9k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.13% of their portfolio | 29.8k $7.5m | New |
| COMERICA BANK 0.06% of their portfolio | 28.2k $7.2m | Added +2.3k |