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ALT · Altimmune, Inc. · Short Volume

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$2.12 -0.05 (-2.30%) At close · Oct 23
Russell 2000 member Rebalance outlook locked
Market Cap
$412.38M
Shares
194.52M
Volume · Oct 23 2.6M Avg daily vol (3M) 4.32M

Daily short-sale volume published by FINRA from its trade-reporting facilities. It measures how many shares were sold short each day as a share of total volume — a daily flow, not the total outstanding short position.

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    • Short Volume

    Date Short Volume Short Exempt Total Volume Short %
    2026-10-23 852,459 2,908 1,475,603 57.8%
    2026-10-22 770,585 0 1,609,586 47.9%
    2026-10-21 1,019,121 12,322 2,218,928 45.9%
    2026-10-20 589,789 409 1,000,385 59.0%
    2026-10-19 590,613 1,383 1,150,221 51.3%
    2026-10-16 933,844 302 1,759,485 53.1%
    2026-10-15 777,588 1,136 1,664,967 46.7%
    2026-10-14 1,226,758 4,248 2,635,395 46.5%
    2026-10-13 1,242,491 8,671 2,199,227 56.5%
    2026-10-12 765,873 422 1,343,302 57.0%
    2026-10-09 830,134 3,742 1,540,090 53.9%
    2026-10-08 1,056,778 1,400 2,131,727 49.6%
    2026-10-07 690,627 20,033 2,150,851 32.1%
    2026-10-06 804,792 1,412 1,466,717 54.9%
    2026-10-05 1,386,891 118 1,869,911 74.2%
    2026-10-02 1,442,357 112 2,219,544 65.0%
    2026-10-01 731,885 10,642 1,701,028 43.0%
    2026-09-30 1,135,222 1,045 1,907,611 59.5%
    2026-09-29 880,085 41 1,571,741 56.0%
    2026-09-28 768,449 8 1,442,585 53.3%
    2026-09-25 763,890 3,306 1,426,141 53.6%
    2026-09-24 1,076,366 1,924 1,948,635 55.2%
    2026-09-23 1,309,032 6,592 2,542,632 51.5%
    2026-09-22 685,893 1,165 1,879,718 36.5%
    2026-09-21 821,979 11,377 2,015,463 40.8%
    2026-09-18 942,639 3,400 1,920,306 49.1%
    2026-09-17 838,985 1,921 1,596,775 52.5%
    2026-09-16 780,921 4,216 1,625,422 48.0%
    2026-09-15 675,228 0 1,231,321 54.8%
    2026-09-14 517,033 1,120 1,184,285 43.7%
    2026-09-11 672,043 2,038 1,309,136 51.3%
    2026-09-10 565,768 112 1,102,627 51.3%
    2026-09-09 785,998 315 1,401,157 56.1%
    2026-09-08 713,768 0 1,692,170 42.2%
    2026-09-04 1,069,944 0 2,519,697 42.5%
    2026-09-03 605,395 504 1,294,292 46.8%
    2026-09-02 1,328,936 6,700 3,478,795 38.2%
    2026-09-01 692,393 1,318 1,208,846 57.3%
    2026-08-31 319,605 250 762,814 41.9%
    2026-08-28 780,664 0 1,454,197 53.7%
    2026-08-27 504,033 95 1,052,563 47.9%
    2026-08-26 831,501 0 1,800,175 46.2%
    2026-08-25 568,050 671 1,839,834 30.9%
    2026-08-24 508,322 4,631 1,315,283 38.6%
    2026-08-21 734,032 6,137 3,225,569 22.8%
    2026-08-20 1,304,262 8,135 2,400,324 54.3%
    2026-08-19 1,086,355 24,669 4,880,168 22.3%
    2026-08-18 457,153 4 1,202,167 38.0%
    2026-08-17 769,672 0 2,282,716 33.7%
    2026-08-14 759,791 846 1,366,138 55.6%
    Showing 1–50 of 64 days
    Key facts CIK 1326190 CUSIP 02155H200 13F (30d) 23 filings 23 filers Visit website Investor relations