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INSM · INSMED Inc

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$123.74 -2.59 (-2.05%) At close · Aug 14
Market Cap
$27.02B
Shares
218.38M

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

Model estimate

Expected Aug 14 short interest

as of Aug 14
11,075,752 -2.4% vs reported
The latest estimate appears in the chart below. Official release expected Aug 25. Methodology
Short Squeeze Score
60/100
Short interest 5.2% of shares — P75 Days to cover 5.1 — P69 Price vs VWAP +15.9% — P89 Short-volume trend -12.7% — P13 Short interest change -2.4% — P46 Worst FTD 0.00% of shares — P34

Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-07-31). 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
    2026-08-31 Scheduled
    FINRA publishes Sep 10
    		 — — — —
    2026-08-14 Scheduled
    FINRA publishes Aug 25
    		 — — — —
    2026-07-31 11,350,580 11,624,756 -274,176 5.14
    2026-07-15 11,624,756 16,030,053 -4,405,297 4.76
    2026-06-30 16,030,053 18,647,626 -2,617,573 2.76
    2026-06-15 18,647,626 19,132,984 -485,358 4.48
    2026-05-29 19,132,984 17,606,497 +1,526,487 6.11
    2026-05-15 17,606,497 14,709,273 +2,897,224 3.38
    2026-04-30 14,709,273 13,855,201 +854,072 9.30
    2026-04-15 13,855,201 13,756,534 +98,667 6.97
    2026-03-31 13,756,534 10,037,946 +3,718,588 4.66
    2026-03-13 10,037,946 11,279,030 -1,241,084 5.28
    2026-02-27 11,279,030 11,489,389 -210,359 4.40
    2026-02-13 11,489,389 11,703,014 -213,625 5.28
    2026-01-30 11,703,014 11,887,857 -184,843 4.76
    2026-01-15 11,887,857 11,015,687 +872,170 4.22
    2025-12-31 11,015,687 8,927,430 +2,088,257 2.33
    2025-12-15 8,927,430 9,866,791 -939,361 3.75
    2025-11-28 9,866,791 8,927,374 +939,417 2.82
    2025-11-14 8,927,374 8,033,501 +893,873 4.30
    2025-10-31 8,033,501 9,481,459 -1,447,958 3.52
    2025-10-15 9,481,459 10,727,695 -1,246,236 4.95
    2025-09-30 10,727,695 10,575,467 +152,228 4.69
    2025-09-15 10,575,467 10,563,132 +12,335 4.86
    2025-08-29 10,563,132 10,496,754 +66,378 4.75
    Showing 1–23 of 23 settlements
    Key facts CIK 1104506 CUSIP 457669307 13F (30d) 609 filings 602 filers Visit website Investor relations

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