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ALNY · Alnylam Pharmaceuticals, Inc. · Short Volume

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$246.74 -7.33 (-2.89%) At close · Sep 30
Nasdaq-100 member Russell 1000 member Rebalance outlook locked
Market Cap
$34.17B
Shares
133.81M
Volume · Sep 30 1.04M Avg daily vol (3M) 1.8M

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.

Pull daily short volume through the short interest API or MCP →
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    • Short Volume

    Date Short Volume Short Exempt Total Volume Short %
    2026-09-30 184,306 2,400 345,493 53.3%
    2026-09-29 229,270 0 311,195 73.7%
    2026-09-28 316,677 0 483,154 65.5%
    2026-09-25 297,784 66 409,848 72.7%
    2026-09-24 291,060 320 388,051 75.0%
    2026-09-23 327,336 2 482,095 67.9%
    2026-09-22 341,915 1 431,690 79.2%
    2026-09-21 388,484 0 504,344 77.0%
    2026-09-18 460,290 0 626,322 73.5%
    2026-09-17 270,101 3 359,913 75.0%
    2026-09-16 215,545 1,642 348,145 61.9%
    2026-09-15 286,149 0 636,009 45.0%
    2026-09-14 200,068 45 282,017 70.9%
    2026-09-11 334,820 0 498,473 67.2%
    2026-09-10 478,400 11,931 646,298 74.0%
    2026-09-09 457,716 51 613,920 74.6%
    2026-09-08 694,201 38,876 834,033 83.2%
    2026-09-04 526,873 0 672,818 78.3%
    2026-09-03 524,250 0 701,412 74.7%
    2026-09-02 927,801 49 1,384,951 67.0%
    2026-09-01 574,167 150 834,203 68.8%
    2026-08-31 455,575 5,181 604,669 75.3%
    2026-08-28 558,715 351 820,781 68.1%
    2026-08-27 397,886 752 716,867 55.5%
    2026-08-26 216,142 0 502,384 43.0%
    2026-08-25 252,948 6,992 673,811 37.5%
    2026-08-24 539,963 0 913,726 59.1%
    2026-08-21 650,465 0 896,757 72.5%
    2026-08-20 567,261 746 907,935 62.5%
    2026-08-19 567,686 161 921,344 61.6%
    2026-08-18 425,661 5,203 715,543 59.5%
    2026-08-17 523,239 59 727,997 71.9%
    2026-08-14 363,732 6,384 708,487 51.3%
    2026-08-13 289,238 20 705,184 41.0%
    2026-08-12 242,586 250 538,417 45.1%
    2026-08-11 124,647 109 609,609 20.4%
    2026-08-10 203,854 17,026 563,347 36.2%
    2026-08-07 281,390 18 769,167 36.6%
    2026-08-06 484,519 352 926,739 52.3%
    2026-08-05 495,493 156 1,372,741 36.1%
    2026-08-04 552,751 825 1,488,451 37.1%
    2026-08-03 325,754 0 1,581,146 20.6%
    2026-07-31 432,556 30,447 2,320,421 18.6%
    2026-07-30 1,624,049 99,377 4,725,586 34.4%
    2026-07-29 344,543 81 584,634 58.9%
    2026-07-28 291,907 53 702,066 41.6%
    2026-07-27 286,475 0 731,772 39.1%
    2026-07-24 317,306 9 507,442 62.5%
    2026-07-23 262,443 5,121 494,354 53.1%
    2026-07-22 272,369 7,272 423,948 64.2%
    Showing 1–50 of 64 days
    Key facts CIK 1178670 CUSIP 02043Q107 13F (30d) 20 filings 16 filers Visit website Investor relations