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IBB · iShares Biotechnology ETF ETF

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$211.92 -1.89 (-0.88%) At close · Sep 4

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

IBB Latest Reported Short Interest

FINRA reported 10,440,435 IBB shares sold short as of the August 14, 2026 settlement date, an increase of 397,965 shares. Days to cover was 7.36 based on FINRA's reported average daily volume.

Official FINRA short-interest data · share counts are restated for subsequent splits of this listing

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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 10,440,435 10,042,470 +397,965 7.36
    2026-07-31 10,042,470 11,909,708 -1,867,238 7.06
    2026-07-15 11,909,708 12,108,341 -198,633 6.42
    2026-06-30 12,108,341 12,435,411 -327,070 7.08
    2026-06-15 12,435,411 13,243,596 -808,185 8.73
    2026-05-29 13,243,596 13,009,363 +234,233 8.78
    2026-05-15 13,009,363 13,267,269 -257,906 9.67
    2026-04-30 13,267,269 12,584,040 +683,229 9.08
    2026-04-15 12,584,040 13,298,650 -714,610 9.39
    2026-03-31 13,298,650 14,315,391 -1,016,741 7.84
    2026-03-13 14,315,391 14,892,958 -577,567 7.65
    2026-02-27 14,892,958 15,059,984 -167,026 9.32
    2026-02-13 15,059,984 12,721,468 +2,338,516 6.94
    2026-01-30 12,721,468 12,700,561 +20,907 7.48
    2026-01-15 12,700,561 12,595,742 +104,819 6.17
    2025-12-31 12,595,742 13,378,601 -782,859 8.52
    2025-12-15 13,378,601 12,218,668 +1,159,933 8.09
    2025-11-28 12,218,668 12,364,326 -145,658 4.09
    2025-11-14 12,364,326 11,794,089 +570,237 4.81
    2025-10-31 11,794,089 11,702,478 +91,611 6.03
    2025-10-15 11,702,478 12,552,874 -850,396 5.00
    2025-09-30 12,552,874 10,834,129 +1,718,745 6.00
    2025-09-15 10,834,129 10,432,887 +401,242 5.52

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements