INSP
Inspire Medical Systems, Inc.
stockNYSE
At CloseOct 2, 2026 3:59:53 PM EDT
69.99USD-1.116%(-0.79)761,930
After-hoursOct 2, 2026 4:39:30 PM EDT
69.97USD-0.029%(-0.02)
As of 2026-09-15, there were 3,928,250 shares short with a short interest of 14.41%.
INSP Short Interest - Official
Short Interest
INSP Short Position Change - Official
Short Position Change
INSP Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | 14.41 | 3,928,250 | 4.94 | +271,638 | +7.43 | 28,910,375 | 27,254,499 |
| 2026-08-31 | 13.42 | 3,656,612 | 7.49 | -717,096 | -16.40 | 28,910,375 | 27,254,499 |
| 2026-08-14 | 16.05 | 4,373,708 | 5.20 | +453,378 | +11.56 | 28,910,375 | 27,254,499 |
| 2026-07-31 | 14.43 | 3,920,330 | 5.02 | -424,299 | -9.77 | 28,813,153 | 27,168,513 |
| 2026-07-15 | 15.99 | 4,344,629 | 4.16 | -350,119 | -7.46 | 28,813,153 | 27,170,156 |
| 2026-06-30 | 17.42 | 4,694,748 | 3.80 | +1,105,132 | +30.79 | 28,813,153 | 26,951,535 |
| 2026-06-15 | 13.21 | 3,589,616 | 3.77 | -91,899 | -2.50 | 28,813,153 | 27,170,156 |
| 2026-05-15 | 13.68 | 3,681,515 | 2.10 | +494,003 | +15.50 | 28,813,153 | 26,914,654 |
| 2026-04-30 | 12.56 | 3,187,512 | 4.04 | +299,108 | +10.36 | 28,797,307 | 25,368,301 |
| 2026-04-15 | 11.39 | 2,888,404 | 2.60 | -313,057 | -9.78 | 28,797,307 | 25,368,301 |
| 2026-03-31 | 12.62 | 3,201,461 | 3.30 | -367,443 | -10.30 | 28,797,307 | 25,368,301 |
| 2026-03-13 | 14.07 | 3,568,904 | 3.82 | -187,059 | -4.98 | 28,589,291 | 25,368,301 |
| 2026-02-27 | 14.81 | 3,755,963 | 2.51 | -187,010 | -4.74 | 28,589,291 | 25,368,301 |
| 2026-02-13 | 15.54 | 3,942,973 | 2.36 | +74,137 | +1.92 | 28,579,015 | 25,368,301 |
| 2026-01-30 | 15.25 | 3,868,836 | 2.59 | +918,128 | +31.12 | 29,056,434 | 25,368,301 |
| 2026-01-15 | 11.63 | 2,950,708 | 2.81 | +43,189 | +1.49 | 29,056,434 | 25,368,301 |
| 2025-12-31 | 11.46 | 2,907,519 | 1.47 | -558,411 | -16.11 | 29,056,434 | 25,368,301 |
| 2025-12-15 | 13.66 | 3,465,930 | 1.87 | -15,789 | -0.45 | 29,056,434 | 25,368,301 |
| 2025-11-28 | 12.58 | 3,481,719 | 1.81 | -189,296 | -5.16 | 29,056,434 | 27,683,252 |
| 2025-11-14 | 13.99 | 3,671,015 | 2.44 | +366,006 | +11.07 | 29,056,434 | 26,236,217 |
| 2025-10-31 | 12.36 | 3,305,009 | 3.34 | +474,898 | +16.78 | 29,574,316 | 26,729,858 |
| 2025-10-15 | 10.59 | 2,830,111 | 2.86 | +179,929 | +6.79 | 29,574,316 | 26,730,746 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.