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INSP · Inspire Medical Systems, Inc.

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$63.21 +1.69 (+2.74%)
S&P 600 member Russell 2000 member Rebalance outlook locked
Market Cap
$1.78B
Shares
28.91M

Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.

INSP Latest Reported Short Interest

FINRA reported 4,373,708 INSP shares sold short as of the August 14, 2026 settlement date, an increase of 453,378 shares. Days to cover was 5.20 based on FINRA's reported average daily volume.

Official FINRA short-interest data · share counts are restated for subsequent stock splits

INSP Short Interest Forecast

Equibles' model estimates 4,254,956 shares sold short for the August 31, 2026 settlement, -2.7% versus the latest reported position, with a likely range of 3,752,333 to 4,688,041 shares. This model prediction uses FINRA data through August 31, 2026; FINRA's official release is expected September 10, 2026.

Model estimate

Expected Aug 31 short interest

as of Aug 31 High confidence 70% chance it falls
4,254,956 -2.7% vs reported
Likely range 3,752,333 to 4,688,041 The latest estimate appears in the chart below. Official release expected Sep 10. Methodology
Short Squeeze Score
83/100
Short interest 15.1% of shares — P96 Days to cover 5.2 — P71 Price vs VWAP +23.7% — P96 Short-volume trend +7.0% — P75 Short interest change +11.6% — P78 Worst FTD 0.03% of shares — P66

Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-08-14). Weighted mean of the available factors (short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, fails-to-deliver 10%) plus catalyst boosts (price spike, volume surge, earnings within days), capped at +20 and clamped to 100.

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    • Short Interest History

    Settlement Date Current Position Previous Position Change Days to Cover
    2026-09-15 Scheduled
    FINRA publishes Sep 24
    		 — — — —
    2026-08-31 Scheduled
    FINRA publishes Sep 10
    		 — — — —
    2026-08-14 4,373,708 3,920,330 +453,378 5.20
    2026-07-31 3,920,330 4,344,629 -424,299 5.02
    2026-07-15 4,344,629 4,694,748 -350,119 4.16
    2026-06-30 4,694,748 3,589,616 +1,105,132 3.80
    2026-06-15 3,589,616 3,695,854 -106,238 3.77
    2026-05-29 3,695,854 3,681,515 +14,339 3.11
    2026-05-15 3,681,515 3,187,512 +494,003 2.10
    2026-04-30 3,187,512 2,888,404 +299,108 4.04
    2026-04-15 2,888,404 3,201,461 -313,057 2.60
    2026-03-31 3,201,461 3,568,904 -367,443 3.30
    2026-03-13 3,568,904 3,755,963 -187,059 3.82
    2026-02-27 3,755,963 3,942,973 -187,010 2.51
    2026-02-13 3,942,973 3,868,836 +74,137 2.36
    2026-01-30 3,868,836 2,950,708 +918,128 2.59
    2026-01-15 2,950,708 2,907,519 +43,189 2.81
    2025-12-31 2,907,519 3,465,930 -558,411 1.47
    2025-12-15 3,465,930 3,481,719 -15,789 1.87
    2025-11-28 3,481,719 3,671,015 -189,296 1.81
    2025-11-14 3,671,015 3,305,009 +366,006 2.44
    2025-10-31 3,305,009 2,830,111 +474,898 3.34
    2025-10-15 2,830,111 2,650,182 +179,929 2.86
    2025-09-30 2,650,182 2,617,345 +32,837 2.58
    2025-09-15 2,617,345 2,347,878 +269,467 2.23

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1609550 CUSIP 457730109 13F (30d) 215 filings 214 filers Visit website Investor relations

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