Inspire Medical Systems, Inc. (INSP)
Every FINRA and SEC series the site collects for Inspire Medical Systems, Inc.: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus.
3.7M
Short interest
settlement 2026-08-31
7.5
Days to cover
-16.4% vs prior
64.9%
Short share of volume
2026-09-17
13,400
Fails to deliver
settlement 2026-08-24
Mon 2 Nov
Next earnings
estimated; last year 2025-11-03
-$57K
Insider flow, 90 days
0 buys, 1 sells
As of 2026-09-17.
Short interest
FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSONAs of 31 August 2026, short interest in INSP is 3,656,612 shares, down 263,718 shares over the last month. Over the last 48 readings it ranged from 1,209,887 shares (13 September 2024) to 4,694,748 shares (30 June 2026). At the reported average volume of 488K shares a day that is 7.5 days to cover, elevated.
Embed this chartkeeps the attribution line it carries
<iframe src="https://xoomar.com/embed/stocks/insp" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-08-31 | 3,656,612 | -16.4% | 488,000 | 7.49 |
| 2026-08-14 | 4,373,708 | +11.6% | 841,529 | 5.20 |
| 2026-07-31 | 3,920,330 | -9.8% | 781,458 | 5.02 |
| 2026-07-15 | 4,344,629 | -7.5% | 1,044,030 | 4.16 |
| 2026-06-30 | 4,694,748 | +30.8% | 1,234,943 | 3.80 |
| 2026-06-15 | 3,589,616 | -2.9% | 951,982 | 3.77 |
| 2026-05-29 | 3,695,854 | +0.4% | 1,187,303 | 3.11 |
| 2026-05-15 | 3,681,515 | +15.5% | 1,750,524 | 2.10 |
| 2026-04-30 | 3,187,512 | +10.4% | 789,041 | 4.04 |
| 2026-04-15 | 2,888,404 | -9.8% | 1,112,214 | 2.60 |
| 2026-03-31 | 3,201,461 | -10.3% | 969,271 | 3.30 |
| 2026-03-13 | 3,568,904 | -5.0% | 934,529 | 3.82 |
| 2026-02-27 | 3,755,963 | -4.7% | 1,495,768 | 2.51 |
| 2026-02-13 | 3,942,973 | +1.9% | 1,670,583 | 2.36 |
| 2026-01-30 | 3,868,836 | +31.1% | 1,491,778 | 2.59 |
| 2026-01-15 | 2,950,708 | +1.5% | 1,048,276 | 2.81 |
| 2025-12-31 | 2,907,519 | -16.1% | 1,984,284 | 1.47 |
| 2025-12-15 | 3,465,930 | -0.5% | 1,857,761 | 1.87 |
| 2025-11-28 | 3,481,719 | -5.2% | 1,923,965 | 1.81 |
| 2025-11-14 | 3,671,015 | +11.1% | 1,502,849 | 2.44 |
| 2025-10-31 | 3,305,009 | +16.8% | 990,699 | 3.34 |
| 2025-10-15 | 2,830,111 | +6.8% | 988,486 | 2.86 |
| 2025-09-30 | 2,650,182 | +1.3% | 1,025,438 | 2.58 |
| 2025-09-15 | 2,617,345 | +11.5% | 1,174,689 | 2.23 |
Daily short volume
FINRA Reg SHO, last 60 sessions. JSONAs of 17 September 2026, the short share of INSP volume is 64.9%, up 10.7 points over the last five sessions. Over the last 52 readings it ranged from 36.0% (16 July 2026) to 75.9% (18 August 2026). The latest reading is 2.7 points above the 30-session average of 62.2%, on 208K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-09-17 | 135K | 208K | 64.9% | 0 |
| 2026-09-16 | 227K | 408K | 55.6% | 9,749 |
| 2026-09-15 | 207K | 351K | 59.0% | 0 |
| 2026-09-14 | 321K | 537K | 59.9% | 0 |
| 2026-09-11 | 353K | 629K | 56.0% | 0 |
| 2026-09-10 | 298K | 550K | 54.2% | 62 |
| 2026-09-09 | 270K | 444K | 60.9% | 0 |
| 2026-09-08 | 120K | 229K | 52.2% | 1 |
| 2026-09-04 | 72K | 140K | 51.8% | 72 |
| 2026-09-03 | 92K | 137K | 67.1% | 2 |
| 2026-09-02 | 80K | 161K | 49.4% | 6 |
| 2026-09-01 | 94K | 131K | 71.3% | 0 |
| 2026-08-31 | 82K | 159K | 52.0% | 0 |
| 2026-08-28 | 87K | 129K | 67.5% | 150 |
| 2026-08-27 | 63K | 107K | 59.0% | 0 |
| 2026-08-26 | 77K | 122K | 62.6% | 0 |
| 2026-08-25 | 66K | 99K | 66.6% | 1 |
| 2026-08-24 | 163K | 222K | 73.4% | 1 |
| 2026-08-21 | 110K | 163K | 67.2% | 25 |
| 2026-08-20 | 124K | 190K | 65.5% | 2 |
| 2026-08-19 | 134K | 224K | 59.9% | 5 |
| 2026-08-18 | 90K | 119K | 75.9% | 0 |
| 2026-08-17 | 100K | 179K | 56.0% | 1 |
| 2026-08-14 | 111K | 162K | 68.7% | 0 |
| 2026-08-13 | 96K | 153K | 63.0% | 0 |
| 2026-08-12 | 161K | 223K | 72.5% | 22 |
| 2026-08-11 | 94K | 132K | 71.2% | 0 |
| 2026-08-10 | 140K | 224K | 62.7% | 0 |
| 2026-08-07 | 135K | 194K | 69.7% | 0 |
| 2026-08-06 | 134K | 265K | 50.5% | 0 |
Fails to deliver
SEC, by settlement date. JSONAs of 24 August 2026, the fails-to-deliver balance in INSP is 13,400 shares, up 13,320 shares over the last settlement date. Over the last 52 readings it ranged from 3 shares (11 December 2025) to 60,000 shares (28 April 2026).
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-08-24 | 13,400 | $62.36 | $836K |
| 2026-08-20 | 80 | $61.69 | $5K |
| 2026-08-10 | 227 | $60.16 | $14K |
| 2026-08-04 | 7,777 | $52.22 | $406K |
| 2026-07-30 | 152 | $51.07 | $8K |
| 2026-07-28 | 201 | $50.93 | $10K |
| 2026-07-20 | 700 | $50.60 | $35K |
| 2026-07-16 | 78 | $50.50 | $4K |
| 2026-07-15 | 22 | $49.15 | $1K |
| 2026-07-14 | 4,000 | $51.36 | $205K |
| 2026-07-13 | 4,000 | $51.76 | $207K |
| 2026-07-10 | 4 | $51.52 | $206 |
| 2026-07-02 | 3,008 | $45.46 | $137K |
| 2026-07-01 | 122 | $44.61 | $5K |
| 2026-06-29 | 8,933 | $45.72 | $408K |
| 2026-06-26 | 38 | $43.45 | $2K |
| 2026-06-15 | 512 | $42.70 | $22K |
| 2026-05-22 | 486 | $44.74 | $22K |
| 2026-05-20 | 32,600 | $42.53 | $1.4M |
| 2026-05-19 | 316 | $41.83 | $13K |
| 2026-05-13 | 33,110 | $44.06 | $1.5M |
| 2026-05-06 | 474 | $48.25 | $23K |
| 2026-05-01 | 109 | $56.14 | $6K |
| 2026-04-28 | 60,000 | $55.07 | $3.3M |
| 2026-04-07 | 4,979 | $54.14 | $270K |
| 2026-04-06 | 4,979 | $54.99 | $274K |
| 2026-03-27 | 6,387 | $50.45 | $322K |
| 2026-03-23 | 86 | $53.72 | $5K |
| 2026-03-20 | 52 | $54.68 | $3K |
| 2026-03-13 | 106 | $58.25 | $6K |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONInsiders at INSP reported 1 open-market sell worth $57K in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Kelly Jason P (See Remarks) on 2026-08-31.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-31 | Kelly Jason P | See Remarks | Grant | 6K | $0.00 | $0 | 25K |
| 2026-08-07 | Kelly Jason P | See Remarks | Sell | 963 | $59.55 | $57K | 19K |
| 2026-07-31 | Mann Melissa | Chief People Officer | Tax withholding | 326 | $50.21 | $16K | 23K |
| 2026-07-20 | CARREL MICHAEL H | n/a | Grant | 6K | $0.00 | $0 | 6K |
| 2026-07-15 | Broader Shelley G | n/a | Grant | 383 | $0.00 | $0 | 9K |
| 2026-05-15 | Rondoni John | See Remarks | Sell | 3K | $43.28 | $114K | 27K |
| 2026-05-14 | Rondoni John | See Remarks | Sell | 700 | $43.01 | $30K | 30K |
| 2026-05-08 | mcCormick Shawn | n/a | Sell | 696 | $45.31 | $32K | 28K |
| 2026-05-01 | Melenikiotou Georgia | n/a | Tax withholding | 50 | $56.70 | $3K | 8K |
| 2026-04-30 | Mead Dana G Jr. | n/a | Grant | 4K | $0.00 | $0 | 26K |
| 2026-04-30 | Tansey Casey M | n/a | Grant | 4K | $0.00 | $0 | 26K |
| 2026-04-30 | mcCormick Shawn | n/a | Grant | 4K | $0.00 | $0 | 28K |
| 2026-04-30 | Melenikiotou Georgia | n/a | Grant | 4K | $0.00 | $0 | 8K |
| 2026-04-30 | Ellis Gary Lee | n/a | Grant | 4K | $0.00 | $0 | 11K |
| 2026-04-30 | Curet Myriam | n/a | Grant | 4K | $0.00 | $0 | 7K |
| 2026-04-30 | Burks Cynthia | n/a | Grant | 4K | $0.00 | $0 | 6K |
| 2026-04-30 | Broader Shelley G | n/a | Grant | 4K | $0.00 | $0 | 8K |
| 2026-04-15 | Melenikiotou Georgia | n/a | Grant | 307 | $52.07 | $16K | 4K |
| 2026-04-15 | Tansey Casey M | n/a | Grant | 308 | $52.07 | $16K | 23K |
| 2026-04-15 | Ellis Gary Lee | n/a | Grant | 518 | $52.07 | $27K | 7K |
| 2026-04-15 | Broader Shelley G | n/a | Grant | 342 | $52.07 | $18K | 5K |
| 2026-02-20 | Phillips Bryan K | See Remarks | Grant | 8K | $0.00 | $0 | 39K |
| 2026-02-20 | Phillips Bryan K | See Remarks | Grant | 16K | $0.00 | $0 | 30K |
| 2026-02-20 | Phillips Bryan K | See Remarks | Tax withholding | 735 | $59.53 | $44K | 14K |
| 2026-02-20 | Phillips Bryan K | See Remarks | Grant | 2K | $0.00 | $0 | 15K |
| 2026-02-20 | Kelly Jason P | See Remarks | Grant | 16K | $0.00 | $0 | 20K |
| 2026-02-20 | Mann Melissa | Chief People Officer | Grant | 16K | $0.00 | $0 | 24K |
| 2026-02-20 | Weatherby Carlton | See Remarks | Grant | 13K | $0.00 | $0 | 42K |
| 2026-02-20 | Weatherby Carlton | See Remarks | Grant | 21K | $0.00 | $0 | 29K |
| 2026-02-20 | Weatherby Carlton | See Remarks | Tax withholding | 672 | $59.53 | $40K | 8K |
| 2026-02-20 | Weatherby Carlton | See Remarks | Grant | 2K | $0.00 | $0 | 9K |
| 2026-02-20 | Rondoni John | See Remarks | Grant | 16K | $0.00 | $0 | 31K |
| 2026-02-20 | Rondoni John | See Remarks | Tax withholding | 735 | $59.53 | $44K | 15K |
| 2026-02-20 | Rondoni John | See Remarks | Grant | 2K | $0.00 | $0 | 15K |
| 2026-02-20 | Herbert Timothy P. | CEO and President | Grant | 62K | $0.00 | $0 | 100K |
| 2026-02-20 | Herbert Timothy P. | CEO and President | Tax withholding | 4K | $59.53 | $239K | 38K |
| 2026-02-20 | Herbert Timothy P. | CEO and President | Grant | 9K | $0.00 | $0 | 42K |
| 2026-02-13 | Mann Melissa | Chief People Officer | Tax withholding | 615 | $59.76 | $37K | 8K |
| 2026-02-13 | Rondoni John | See Remarks | Tax withholding | 587 | $59.76 | $35K | 13K |
| 2026-02-13 | Kelly Jason P | See Remarks | Tax withholding | 551 | $59.76 | $33K | 4K |
| 2026-02-13 | Weatherby Carlton | See Remarks | Tax withholding | 570 | $59.76 | $34K | 7K |
| 2026-02-13 | Phillips Bryan K | See Remarks | Tax withholding | 579 | $59.76 | $35K | 12K |
| 2026-02-13 | Herbert Timothy P. | CEO and President | Tax withholding | 2K | $59.76 | $98K | 33K |
| 2026-02-13 | Buchholz Richard | Interim CFO | Tax withholding | 579 | $59.76 | $35K | 44K |
| 2026-02-09 | Weatherby Carlton | See Remarks | Tax withholding | 327 | $66.33 | $22K | 7K |
| 2026-02-09 | Phillips Bryan K | See Remarks | Tax withholding | 327 | $66.33 | $22K | 13K |
| 2026-02-09 | Rondoni John | See Remarks | Tax withholding | 327 | $66.33 | $22K | 13K |
| 2026-02-09 | Herbert Timothy P. | CEO and President | Tax withholding | 968 | $66.33 | $64K | 34K |
| 2026-02-09 | Buchholz Richard | Interim CFO | Tax withholding | 327 | $66.33 | $22K | 45K |
| 2026-01-15 | Melenikiotou Georgia | n/a | Grant | 180 | $96.47 | $17K | 4K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are the rarer, stronger signal.
Planned sales (Form 144)
Newest first. JSON8 Form 144 notices on file for INSP worth $654K at the prices reported; 2 in the last 90 days worth $61K. Latest: JOHN RONDONI filed on 2026-08-24 to sell 64 shares ($4K) from 2026-08-24.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-08-24 | JOHN RONDONIOfficer | 64 | $4K | 0.000% | 2026-08-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-07 | JASON P KELLYOfficer | 963 | $57K | 0.003% | 2026-08-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-15 | JOHN RONDONIOfficer | 3K | $114K | 0.009% | 2026-05-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-14 | JOHN RONDONIOfficer | 700 | $30K | 0.002% | 2026-05-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-08 | SHAWN T MCCORMICKDirector | 696 | $32K | 0.002% | 2026-05-08 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-09 | JOHN RONDONIOfficer | 109 | $10K | 0.000% | 2026-01-09 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-02 | SHAWN T MCCORMICKDirector | 1K | $152K | 0.004% | 2025-12-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-28 | SHAWN T MCCORMICKDirector | 2K | $255K | 0.007% | 2025-11-28 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person, newest filing first. JSON34 holders above 5% have filed on INSP, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 14.4% of the class (4,163,016 shares), filed 2026-07-28 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-13 | 13G/Ano. 1 | Soleus GP, LLCother entity | 1.9M | 6.7% | 2026-06-30 |
| 2026-08-13 | 13G/Ano. 1 | Soleus Capital Group, LLCother entity | 1.9M | 6.7% | 2026-06-30 |
| 2026-08-13 | 13G/Ano. 1 | Soleus Capital Management, L.P.partnership | 1.9M | 6.7% | 2026-06-30 |
| 2026-08-13 | 13G/Ano. 1 | Guy Levyindividual | 1.9M | 6.7% | 2026-06-30 |
| 2026-08-13 | 13G/Ano. 1 | Soleus Capital Master Fund, L.P.non-US institution | 1.9M | 6.7% | 2026-06-30 |
| 2026-08-13 | 13G/Ano. 1 | Soleus Capital, LLCother entity | 1.9M | 6.7% | 2026-06-30 |
| 2026-08-12 | 13G | AQR Capital Management, LLCinvestment adviser | 1.9M | 6.4% | 2026-06-30 |
| 2026-08-12 | 13G | AQR Capital Management Holdings, LLCparent holding company | 1.9M | 6.4% | 2026-06-30 |
| 2026-07-31 | 13G/Ano. 1 | Vanguard Portfolio Managementinvestment adviser | 2.1M | 7.4% | 2026-06-30 |
| 2026-07-28 | 13G/Ano. 7 | BlackRock, Inc.parent holding company | 4.2M | 14.4% | 2026-06-30 |
| 2026-07-02 | 13G | David E. Shawindividual | 1.5M | 5.1% | 2026-06-25 |
| 2026-07-02 | 13G | D. E. Shaw & Co., L.P.investment adviser, partnership | 1.5M | 5.1% | 2026-06-25 |
| 2026-05-27 | 13G | Soleus Capital Master Fund, L.P.non-US institution | 1.5M | 5.1% | 2026-05-26 |
| 2026-05-27 | 13G | Soleus Capital, LLCother entity | 1.5M | 5.1% | 2026-05-26 |
| 2026-05-27 | 13G | Soleus Capital Group, LLCother entity | 1.5M | 5.1% | 2026-05-26 |
| 2026-05-27 | 13G | Soleus Capital Management, L.P.partnership | 1.5M | 5.1% | 2026-05-26 |
| 2026-05-27 | 13G | Soleus GP, LLCother entity | 1.5M | 5.1% | 2026-05-26 |
| 2026-05-27 | 13G | Guy Levyindividual | 1.5M | 5.1% | 2026-05-26 |
| 2026-05-15 | 13G/Ano. 1 | Wellington Management Group LLPparent holding company | 2.5M | 8.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Wellington Investment Advisors Holdings LLPparent holding company | 2.5M | 8.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Wellington Group Holdings LLPparent holding company | 2.5M | 8.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Wellington Management Company LLPinvestment adviser | 2.5M | 8.6% | 2026-03-31 |
| 2026-05-14 | 13G/Ano. 1 | Deerfield Management Company, L.P.partnership | 1.3M | 4.5% | 2026-05-14 |
| 2026-05-14 | 13G/Ano. 1 | Deerfield Partners, L.P.partnership | 1.3M | 4.5% | 2026-05-14 |
| 2026-05-14 | 13G/Ano. 1 | James E. Flynnindividual | 1.3M | 4.5% | 2026-05-14 |
| 2026-05-14 | 13G/Ano. 1 | Deerfield Mgmt, L.P.partnership | 1.3M | 4.5% | 2026-05-14 |
| 2026-04-30 | 13G | Vanguard Capital Managementinvestment adviser | 1.5M | 5.1% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Portfolio Managementinvestment adviser | 1.6M | 5.7% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 4 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 1 | Kenneth Griffinparent holding company, individual | 527K | 1.8% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Citadel Securities GP LLCparent holding company, other entity | 353K | 1.2% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Citadel Securities Group LPparent holding company, partnership | 353K | 1.2% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Citadel Advisors Holdings LPparent holding company, partnership | 175K | 0.6% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Citadel GP LLCparent holding company, other entity | 175K | 0.6% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Citadel Advisors LLCinvestment adviser, parent holding company, other entity | 175K | 0.6% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Citadel Securities LLCbroker-dealer, other entity | 155K | 0.5% | 2025-12-31 |
| 2026-02-10 | 13G | Wellington Management Group LLPparent holding company | 2.2M | 7.6% | 2025-12-31 |
| 2026-02-10 | 13G | Wellington Investment Advisors Holdings LLPparent holding company | 2.2M | 7.6% | 2025-12-31 |
| 2026-02-10 | 13G | Wellington Group Holdings LLPparent holding company | 2.2M | 7.6% | 2025-12-31 |
| 2026-02-10 | 13G | Wellington Management Company LLPinvestment adviser | 2.2M | 7.3% | 2025-12-31 |
| 2025-11-14 | 13G/Ano. 1 | Marc Stadindividual, parent holding company | 0 | 0.0% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 1 | Dragoneer Investment Group, LLCinvestment adviser, other entity | 0 | 0.0% | 2025-09-30 |
| 2025-11-13 | 13G | Deerfield Management Company, L.P.partnership | 1.5M | 5.1% | 2025-11-06 |
| 2025-11-13 | 13G | Deerfield Partners, L.P.partnership | 1.5M | 5.1% | 2025-11-06 |
| 2025-11-13 | 13G | James E. Flynnindividual | 1.5M | 5.1% | 2025-11-06 |
| 2025-11-13 | 13G | Deerfield Mgmt, L.P.partnership | 1.5M | 5.1% | 2025-11-06 |
| 2025-11-12 | 13G/Ano. 1 | Wasatch Advisors LPinvestment adviser | 136K | 0.5% | 2025-09-30 |
| 2025-10-17 | 13G/Ano. 6 | BlackRock, Inc.parent holding company | 3.4M | 11.3% | 2025-09-30 |
| 2025-10-07 | 13G/Ano. 4 | FMR LLCparent holding company | 741K | 2.5% | 2025-09-30 |
| 2025-10-07 | 13G/Ano. 4 | Abigail P. Johnsonindividual | 741K | 2.5% | 2025-09-30 |
13F holders
Tracked managers holding INSP at their latest 13F. JSON5 of the 30 tracked managers held INSP at their latest 13F, $195.7M in total at quarter-end prices. AQR Capital Management is the largest at $80.9M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 1.9M | $80.9M | 0.03% | +1.5M |
| D. E. Shaw & Co. | 2026-06-30 | 1.5M | $65.6M | 0.03% | +271K |
| Citadel Advisors | 2026-06-30 | 581K | $25.9M | 0.00% | +98K |
| Renaissance Technologies | 2026-06-30 | 426K | $19.0M | 0.03% | -44K |
| Millennium Management | 2026-06-30 | 94K | $4.2M | 0.00% | -307K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q2 2026 (quarter ended 2026-06-30) Inspire Medical Systems, Inc. reported revenue of $200.6M, down 7.6% from the same quarter a year earlier, and net income of $314K (0.01 diluted EPS). In FY 2025 it generated $117.0M of operating cash flow and spent $175.0M on buybacks.
- Cash
- $127.8M
- Equity
- $825.6M
- Total assets
- $926.0M
- Shares outstanding
- 28,910,375
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 2026 | 2026-06-30 | $200.6M | $314K | 0.2% | 0.01 |
| Q1 2026 | 2026-03-31 | $204.6M | -$11.3M | -5.5% | -0.39 |
| Q4 2025derived | 2025-12-31 | $269.1M | $136.1M | 50.6% | n/a |
| Q3 2025 | 2025-09-30 | $224.5M | $9.9M | 4.4% | 0.34 |
| Q2 2025 | 2025-06-30 | $217.1M | -$3.6M | -1.7% | -0.12 |
| Q1 2025 | 2025-03-31 | $201.3M | $3.0M | 1.5% | 0.10 |
| Q4 2024derived | 2024-12-31 | $239.7M | $35.2M | 14.7% | n/a |
| Q3 2024 | 2024-09-30 | $203.2M | $18.5M | 9.1% | 0.60 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $912.0M | $145.4M | $117.0M | $38.5M | $175.0M | n/a |
| FY 2024 | 2024-12-31 | $802.8M | $53.5M | $130.2M | $39.1M | $0 | n/a |
| FY 2023 | 2023-12-31 | $624.8M | -$21.2M | $24.7M | $23.6M | $0 | n/a |
| FY 2022 | 2022-12-31 | $407.9M | -$44.9M | $11.6M | $9.1M | $0 | n/a |
| FY 2021 | 2021-12-31 | $233.4M | -$42.0M | -$20.1M | $4.7M | n/a | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-30 from the cover page.
What this page is
Inspire Medical Systems, Inc. in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.
This page follows Inspire Medical Systems, Inc. (INSP), SEC CIK 1609550, listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus. The cross-market tables live on the short interest and insider transactions hubs.
Source and method
- Short interest
- FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-31.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-17.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-24.JSON and CSV
- Planned sales
- SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-08-24.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-08-13.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K Item 2.02 (full-text search)EDGAR full-text search read twice a day; the estimate is last year's date plus 52 weeks. Latest 2026-08-03.JSON and CSV
- Insider trades
- SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-08-31.JSON and CSV
- Company record
- EDGAR filing index for CIK 1609550Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 30 requests a minute without a key, 120 a minute with a key from a free account.
Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 18 Sep 05:40 UTC.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as surgical & medical instruments & apparatus
- BSXBOSTON SCIENTIFIC CORP
- TNDMTANDEM DIABETES CARE INC
- DXCMDEXCOM INC
- PENPenumbra Inc
- SIBNSI-BONE, Inc.
- MMM3M CO
- LMATLEMAITRE VASCULAR INC
- NVCRNovoCure Ltd
- RMDRESMED INC
- SYKSTRYKER CORP
- GKOSGLAUKOS Corp
- IRTCiRhythm Holdings, Inc.
- ICUIICU MEDICAL INC/DE
- ATECAlphatec Holdings, Inc.
- AORTARTIVION, INC.
- PODDINSULET CORP
- BDXBECTON DICKINSON & CO
- IRMDIRADIMED CORP
- ATRCAtriCure, Inc.
- UFPTUFP TECHNOLOGIES INC
- LUNGPulmonx Corp
- MMSIMERIT MEDICAL SYSTEMS INC
- ANGOANGIODYNAMICS INC
- OFIXOrthofix Medical Inc.
Datasets
Frequently Asked Questions
How much of INSP is sold short?
What is INSP's daily short volume?
Does INSP have fails to deliver?
Are INSP insiders buying or selling?
Have INSP insiders filed to sell?
Who owns more than 5% of INSP?
What did INSP report last quarter?
Which funds hold INSP?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.