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IONS · Ionis Pharmaceuticals Inc

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$52.53 -5.60 (-9.63%)
Russell 1000 member Rebalance outlook locked
Market Cap
$9.65B
Shares
166.18M

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 %
    2026-09-04 350,510 30,784 913,881 38.4%
    2026-09-03 552,941 17,226 2,028,657 27.3%
    2026-09-02 340,306 124 741,210 45.9%
    2026-09-01 305,822 778 633,248 48.3%
    2026-08-31 379,802 2,602 649,419 58.5%
    2026-08-28 444,360 57,284 715,275 62.1%
    2026-08-27 383,770 976 574,040 66.9%
    2026-08-26 756,131 1,158 1,005,380 75.2%
    2026-08-25 624,356 12,662 1,016,660 61.4%
    2026-08-24 521,314 14,210 863,647 60.4%
    2026-08-21 589,350 430 1,274,304 46.2%
    2026-08-20 352,304 449 861,830 40.9%
    2026-08-19 640,463 5,448 1,307,971 49.0%
    2026-08-18 551,874 3,729 1,023,305 53.9%
    2026-08-17 356,672 3,836 656,135 54.4%
    2026-08-14 197,653 6,000 589,890 33.5%
    2026-08-13 268,039 2,103 444,957 60.2%
    2026-08-12 368,060 1,177 997,824 36.9%
    2026-08-11 374,506 3,147 1,170,616 32.0%
    2026-08-10 407,784 804 715,585 57.0%
    2026-08-07 405,941 2,138 662,569 61.3%
    2026-08-06 527,078 2,879 1,010,245 52.2%
    2026-08-05 414,472 9,723 889,280 46.6%
    2026-08-04 659,864 53,387 1,058,798 62.3%
    2026-08-03 673,126 1,586 1,049,782 64.1%
    2026-07-31 611,465 76,653 1,012,491 60.4%
    2026-07-30 658,415 13,419 1,251,745 52.6%
    2026-07-29 875,026 39,072 1,364,412 64.1%
    2026-07-28 554,220 192 1,008,794 54.9%
    2026-07-27 659,801 113 1,043,318 63.2%
    2026-07-24 574,829 62 1,051,413 54.7%
    2026-07-23 784,490 1,120 1,690,408 46.4%
    2026-07-22 1,633,544 480 4,543,533 36.0%
    2026-07-21 423,302 632 1,403,553 30.2%
    2026-07-20 570,080 670 881,480 64.7%
    2026-07-17 604,288 201 1,067,805 56.6%
    2026-07-16 1,525,938 3,169 2,075,575 73.5%
    2026-07-15 1,064,628 36 1,507,830 70.6%
    2026-07-14 1,245,431 30,300 2,080,426 59.9%
    2026-07-13 1,581,474 32,600 2,664,167 59.4%
    2026-07-10 3,252,819 301,410 5,386,820 60.4%
    2026-07-09 5,221,041 501,695 10,301,638 50.7%
    2026-07-08 633,589 36,800 832,266 76.1%
    2026-07-07 790,750 14,289 1,255,816 63.0%
    2026-07-06 518,919 19,925 759,072 68.4%
    2026-07-02 769,524 12,419 991,199 77.6%
    2026-07-01 356,192 5,196 554,297 64.3%
    2026-06-30 342,336 2,184 522,876 65.5%
    2026-06-29 778,493 5,026 1,052,908 73.9%
    2026-06-26 1,142,965 33,449 1,544,519 74.0%
    Showing 1–50 of 65 days
    Key facts CIK 874015 CUSIP 462222100 13F (30d) 369 filings 367 filers Visit website Investor relations