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 ($8.7m this quarter). Holder counts are more reliable. Shares outstanding: 29.8m as of 2024-07-31, 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 ≈ $133.87. Options: 20 managers hold calls ($68.8m notional), 23 hold puts ($70.8m).
Trends to Q2 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 |
| Q2 2024 | 325 |
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 |
| Q2 2024 | 189 | 167 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2023 | $68.4m | $140.9m | 2.06 |
| Q4 2023 | $80.1m | $112.5m | 1.40 |
| Q1 2024 | $130.1m | $162.8m | 1.25 |
| Q2 2024 | $68.8m | $70.8m | 1.03 |
Biggest buyers
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Added | +519.6k |
| Invesco Ltd. | Added | +499.7k |
| JANUS HENDERSON GROUP PLC | Added | +461.6k |
| JPMORGAN CHASE & CO | Added | +448.0k |
| BROWN CAPITAL MANAGEMENT LLC | Added | +329.4k |
| Iron Triangle Partners LP | New | +282.0k |
| BRAIDWELL LP | Added | +278.0k |
| Artisan Partners Limited Partnership | Added | +243.5k |
| Balyasny Asset Management L.P. | Added | +238.1k |
| WASATCH ADVISORS LP | Added | +200.1k |
Biggest sellers
| FMR LLC | Reduced | -1.4m |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Sold out | -538.3k |
| JENNISON ASSOCIATES LLC | Reduced | -248.8k |
| Point72 Asset Management, L.P. | Reduced | -232.0k |
| AMERIPRISE FINANCIAL INC | Reduced | -199.4k |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Reduced | -185.5k |
| MORGAN STANLEY | Reduced | -152.3k |
| Driehaus Capital Management LLC | Sold out | -142.9k |
| Allspring Global Investments Holdings, LLC | Reduced | -136.8k |
| Champlain Investment Partners, LLC | Reduced | -126.9k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $15.1m112.5k shares |
| MILLENNIUM MANAGEMENT LLC | Added | $10.2m76.3k shares |
| JANE STREET GROUP, LLC | Reduced | $9.0m67.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $7.3m54.9k shares |
| CITIGROUP INC | New | $3.9m28.9k shares |
| Squarepoint Ops LLC | Reduced | $3.2m24.2k shares |
| IMC-Chicago, LLC | Added | $3.0m22.6k shares |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC | New | $2.7m20.0k shares |
| Twin Tree Management, LP | New | $2.7m19.9k shares |
| Cubist Systematic Strategies, LLC | Added | $2.5m18.5k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $13.3m99.2k shares |
| CITADEL ADVISORS LLC | Reduced | $12.2m91.3k shares |
| D. E. Shaw & Co., Inc. | Reduced | $6.7m50.1k shares |
| MILLENNIUM MANAGEMENT LLC | Reduced | $5.9m44.3k shares |
| JANE STREET GROUP, LLC | Added | $5.4m40.6k shares |
| PURA VIDA INVESTMENTS, LLC | Added | $4.0m30.0k shares |
| IMC-Chicago, LLC | Added | $3.5m26.5k shares |
| Squarepoint Ops LLC | Reduced | $2.7m20.1k shares |
| Twin Tree Management, LP | Reduced | $2.4m17.8k shares |
| SIMPLEX TRADING, LLC | Reduced | $2.3m17.3k 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), WASATCH ADVISORS LP (0.5%, 2025-11-12)
Insider purchases and sales in Q2 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 |
|---|---|---|---|---|---|
| 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 |
| Q2 2024 | 0 | — | 3 | $11.7m | $3.5m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-04-17 | Buchholz Richard Chief Financial Officer | Sold plan | $3.5m15.0k shares |
| 2024-04-01 | Herbert Timothy P. CEO and President, director · By Trust | Sold | $8.2m40.0k shares |
| 2024-04-01 | Herbert Timothy P. CEO and President, director · By Trust | Sold plan | $8.2m40.0k shares |
| 2024-04-01 | Griffin Jerry C Director | Sold plan | $6.8k32 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, Q2 2024
| Manager | Shares | Change |
|---|---|---|
| FMR LLC 0.03% of their portfolio | 3.0m $406.7m | Reduced -1.4m |
| VANGUARD GROUP INC 0.01% of their portfolio | 2.9m $384.0m | Reduced -22.8k |
| WELLINGTON MANAGEMENT GROUP LLP 0.05% of their portfolio | 2.0m $264.3m | Added +22.4k |
| BlackRock Inc. 0.01% of their portfolio | 1.9m $248.6m | Reduced -33.1k |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 1.7m $225.4m | Added +448.0k |
| BAILLIE GIFFORD & CO 0.15% of their portfolio | 1.4m $191.0m | Reduced -40.8k |
| WASATCH ADVISORS LP 0.93% of their portfolio | 1.3m $174.4m | Added +200.1k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 787.8k $105.4m | Added +192.2k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.27% of their portfolio | 770.4k $103.1m | Added +13.6k |
| MACQUARIE GROUP LTD 0.09% of their portfolio | 592.1k $79.2m | Added +33.6k |
| STATE STREET CORP 0.00% of their portfolio | 589.8k $78.9m | Added +59.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.02% of their portfolio | 566.7k $75.8m | Added +519.6k |
| Artisan Partners Limited Partnership 0.11% of their portfolio | 544.7k $72.9m | Added +243.5k |
| Invesco Ltd. 0.02% of their portfolio | 539.1k $72.1m | Added +499.7k |
| Eversept Partners, LP 5.46% of their portfolio | 533.0k $71.3m | Added +112.3k |
| Champlain Investment Partners, LLC 0.42% of their portfolio | 514.8k $68.9m | Reduced -126.9k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.66% of their portfolio | 499.2k $66.8m | Reduced -185.5k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 480.5k $64.3m | Added +18.2k |
| JANUS HENDERSON GROUP PLC 0.03% of their portfolio | 475.2k $63.6m | Added +461.6k |
| BROWN CAPITAL MANAGEMENT LLC 1.10% of their portfolio | 407.8k $54.6m | Added +329.4k |
| FEDERATED HERMES, INC. 0.13% of their portfolio | 405.2k $54.2m | Reduced -48.0k |
| BRAIDWELL LP 1.59% of their portfolio | 379.4k $50.8m | Added +278.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 364.9k $48.8m | Reduced -94.9k |
| BAMCO INC /NY/ 0.13% of their portfolio | 347.3k $46.5m | Added +137.3k |
| Balyasny Asset Management L.P. 0.11% of their portfolio | 315.1k $42.2m | Added +238.1k |
| Iron Triangle Partners LP 3.96% of their portfolio | 282.0k $37.7m | New |
| NORGES BANK 0.01% of their portfolio | 278.0k $37.2m | Added +3.4k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 269.2k $36.0m | Added +339 |
| AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio | 259.9k $34.8m | Reduced -78.5k |
| MORGAN STANLEY 0.00% of their portfolio | 257.4k $34.4m | Reduced -152.3k |
| GILDER GAGNON HOWE & CO LLC 0.40% of their portfolio | 240.7k $32.2m | Reduced -10.1k |
| FRANKLIN RESOURCES INC 0.01% of their portfolio | 233.3k $31.2m | Reduced -76.6k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 232.0k $31.1m | Reduced -199.4k |
| AQR CAPITAL MANAGEMENT LLC 0.05% of their portfolio | 231.8k $31.0m | Added +140.1k |
| Amundi 0.01% of their portfolio | 210.3k $28.2m | Added +125.7k |
| KEYBANK NATIONAL ASSOCIATION/OH 0.11% of their portfolio | 200.2k $26.8m | Reduced -1.5k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.03% of their portfolio | 187.1k $25.0m | Added +116.9k |
| Atika Capital Management LLC 2.53% of their portfolio | 163.0k $21.8m | Added +33.3k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 155.8k $20.8m | Added +1.4k |
| VOYA INVESTMENT MANAGEMENT LLC 0.02% of their portfolio | 154.0k $20.6m | Reduced -71.7k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 151.5k $20.3m | Added +48.8k |
| FRED ALGER MANAGEMENT, LLC 0.10% of their portfolio | 149.6k $20.0m | Reduced -73.0k |
| EAGLE ASSET MANAGEMENT INC 0.11% of their portfolio | 142.9k $19.8m | Added +137.6k |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 139.2k $18.6m | Added +4.3k |
| Eagle Health Investments LP 3.27% of their portfolio | 136.6k $18.3m | Added +14.4k |
| Tri Locum Partners LP 4.51% of their portfolio | 133.3k $17.8m | Added +109.7k |
| CREDIT AGRICOLE S A 0.11% of their portfolio | 130.0k $17.4m | New |
| Rock Springs Capital Management LP 0.53% of their portfolio | 130.0k $17.4m | Reduced -500 |
| Ensign Peak Advisors, Inc 0.03% of their portfolio | 125.3k $16.8m | Reduced -38.4k |
| EVENTIDE ASSET MANAGEMENT, LLC 0.29% of their portfolio | 125.1k $16.7m | Unchanged |
| Bellevue Group AG 0.27% of their portfolio | 124.7k $16.7m | Reduced -93.0k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 109.6k $14.7m | Added +48.6k |
| Aquatic Capital Management LLC 0.52% of their portfolio | 105.2k $14.1m | Added +102.8k |
| Aberdeen Group plc 0.03% of their portfolio | 104.5k $14.0m | Added +58.5k |
| LAZARD ASSET MANAGEMENT LLC 0.02% of their portfolio | 101.8k $13.6m | Added +38.6k |
| Hood River Capital Management LLC 0.26% of their portfolio | 93.1k $12.5m | Reduced -96.2k |
| BARCLAYS PLC 0.01% of their portfolio | 87.2k $11.7m | Added +67.2k |
| CAPITAL FUND MANAGEMENT S.A. 0.13% of their portfolio | 86.8k $11.6m | Added +41.4k |
| KINGDON CAPITAL MANAGEMENT, L.L.C. 1.78% of their portfolio | 86.3k $11.5m | New |
| Mitsubishi UFJ Trust & Banking Corp 0.03% of their portfolio | 85.2k $11.4m | Reduced -15.7k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio | 85.0k $11.4m | Reduced -40.0k |
| SEI INVESTMENTS CO 0.02% of their portfolio | 84.4k $11.3m | Reduced -9.3k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 82.2k $11.0m | Reduced -22.8k |
| NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio | 81.5k $10.9m | Added +18.9k |
| Connor, Clark & Lunn Investment Management Ltd. 0.05% of their portfolio | 81.1k $10.9m | Reduced -11.3k |
| Rheos Capital Works Inc. 0.56% of their portfolio | 79.4k $10.6m | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 79.4k $10.6m | Reduced -41.2k |
| Thrivent Financial for Lutherans 0.02% of their portfolio | 79.1k $10.6m | Reduced -25.9k |
| RENAISSANCE TECHNOLOGIES LLC 0.02% of their portfolio | 73.6k $9.8m | Reduced -36.0k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.03% of their portfolio | 71.1k $9.5m | Added +15.5k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.01% of their portfolio | 70.5k $9.4m | Added +8.9k |
| MAIRS & POWER INC 0.08% of their portfolio | 63.8k $8.5m | Added +4.6k |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 62.9k $8.4m | Added +51.1k |
| Impax Asset Management Group plc 0.03% of their portfolio | 60.0k $8.0m | New |
| Vestal Point Capital, LP 0.60% of their portfolio | 60.0k $8.0m | New |
| Swiss National Bank 0.01% of their portfolio | 59.6k $8.0m | Added +1.3k |
| UBS Group AG 0.00% of their portfolio | 57.8k $7.7m | Added +25.6k |
| KORNITZER CAPITAL MANAGEMENT INC /KS 0.12% of their portfolio | 48.9k $6.5m | Reduced -22.0k |
| HRT FINANCIAL LP 0.04% of their portfolio | 46.7k $6.2m | Added +45.2k |
| Stanley-Laman Group, Ltd. 0.89% of their portfolio | 46.0k $6.2m | Reduced -4.4k |
| TWINBEECH CAPITAL LP 0.12% of their portfolio | 45.8k $6.1m | New |
| California Public Employees Retirement System 0.00% of their portfolio | 42.4k $5.7m | Added +2.0k |
| Cubist Systematic Strategies, LLC 0.10% of their portfolio | 41.6k $5.6m | New |
| Kopp Family Office, LLC 3.41% of their portfolio | 41.1k $5.5m | Added +11 |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.05% of their portfolio | 40.9k $5.5m | Added +437 |
| Legal & General Group Plc 0.00% of their portfolio | 40.5k $5.4m | Added +10.8k |
| MARSHALL WACE, LLP 0.01% of their portfolio | 40.5k $5.4m | New |
| Bullseye Asset Management LLC 2.40% of their portfolio | 36.6k $4.9m | Added +9.4k |
| Walleye Capital LLC 0.05% of their portfolio | 35.9k $4.8m | Added +35.3k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 35.9k $4.8m | Added +304 |
| Y-Intercept (Hong Kong) Ltd 0.25% of their portfolio | 34.7k $4.6m | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 34.3k $4.6m | Added +21.2k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 34.2k $4.6m | New |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.02% of their portfolio | 33.2k $4.4m | Added +4.4k |
| Jump Financial, LLC 0.09% of their portfolio | 32.5k $4.3m | New |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 32.3k $4.3m | Added +18.2k |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC 0.42% of their portfolio | 32.2k $4.3m | Reduced -1.8k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 32.1k $4.3m | Added +123 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.01% of their portfolio | 31.8k $4.3m | Added +23.7k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 31.7k $4.2m | Reduced -61.3k |