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ANNX · Annexon, Inc. · Short Interest

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$3.86 +0.03 (+0.78%) At close · Oct 21
Russell 2000 member Rebalance outlook locked
Market Cap
$798.36M
Shares
204.44M
Volume · Oct 21 4.95M Avg daily vol (3M) 3.05M

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

Pull short interest history through the short interest API or MCP →

ANNX Latest Reported Short Interest

FINRA reported 32,009,914 ANNX shares sold short as of the September 30, 2026 settlement date, a decrease of 862,081 shares. Days to cover was 8.90 based on FINRA's reported average daily volume.

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

ANNX Short Interest Forecast

Equibles' model estimates 33,258,020 shares sold short for the October 15, 2026 settlement, +3.9% versus the latest reported position, with a likely range of 30,346,345 to 36,416,793 shares. This model prediction uses FINRA data through October 15, 2026; FINRA's official release is expected October 26, 2026.

Model estimate

Expected Oct 15 short interest

as of Oct 15 Low confidence 51% chance it rises
33,258,020 +3.9% vs reported
Likely range 30,346,345 to 36,416,793 The latest estimate appears in the chart below. Official release expected Oct 26. Methodology
Short Squeeze Score
69/100
Short interest 15.7% of shares — P95 Days to cover 8.9 — P89 Price vs VWAP -13.7% — P30 Short-volume trend +6.2% — P75 Short interest change -2.6% — P39 Worst FTD 0.00% of shares — P34

Positioning score 69.4 + catalyst boost 0 (total capped at 100). This is a screening index, not a probability of a squeeze.

Method and coverage limits

Factor percentiles compare eligible primary operating-company stocks reporting short interest at the latest settlement date (2026-09-30). The weighted mean uses short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, and fails-to-deliver 10%. Missing factors redistribute their weight; incomplete coverage is not evidence of low risk. Price, volume, and earnings boosts add 10 each, capped at 20.

Shares outstanding are not free float. Borrow fees, utilization, lendable supply, recalls, and dealer inventory are not measured. Short-sale volume does not measure the change in open shorts; fails to deliver are not a borrow-cost measurement; price vs VWAP does not establish short sellers' entry prices. Earnings can move prices in either direction.

The weights are judgment-based, not calibrated to future squeeze outcomes. The separate options assessment below does not change this universe ranking.

Options positioning & squeeze sensitivity

Nearest expiration after today within 30 calendar days; same-day expirations and later maturities are excluded.

Open interest is incomplete, stale, or dated inconsistently; positioning totals are unavailable.

Open interest has both a buyer and a seller; it does not reveal dealer hedge direction. Gross gamma sums both calls and puts without netting and uses a local 1% price-change approximation. It measures sensitivity, not predicted buying or a squeeze probability.

Assessment prepared 2026-10-22 04:02 UTC. Options model values may come from a cached snapshot; their original computation time is not supplied. Open interest has its own effective date.

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    • Short Interest History

    Settlement Date Current Position Previous Position Change Days to Cover
    2026-10-30 Scheduled
    FINRA publishes Nov 10
    		 — — — —
    2026-10-15 Scheduled
    FINRA publishes Oct 26
    		 — — — —
    2026-09-30 32,009,914 32,871,995 -862,081 8.90
    2026-09-15 32,871,995 32,094,286 +777,709 11.68
    2026-08-31 32,094,286 32,583,299 -489,013 12.72
    2026-08-14 32,583,299 30,772,146 +1,811,153 13.17
    2026-07-31 30,772,146 29,827,889 +944,257 10.45
    2026-07-15 29,827,889 29,604,763 +223,126 5.74
    2026-06-30 29,604,763 26,388,542 +3,216,221 5.42
    2026-06-15 26,388,542 25,834,304 +554,238 9.30
    2026-05-29 25,834,304 24,288,025 +1,546,279 9.73
    2026-05-15 24,288,025 23,443,455 +844,570 13.28
    2026-04-30 23,443,455 19,675,024 +3,768,431 10.91
    2026-04-15 19,675,024 18,637,378 +1,037,646 7.87
    2026-03-31 18,637,378 16,401,412 +2,235,966 5.72
    2026-03-13 16,401,412 15,901,379 +500,033 6.11
    2026-02-27 15,901,379 16,131,493 -230,114 6.99
    2026-02-13 16,131,493 17,217,855 -1,086,362 7.76
    2026-01-30 17,217,855 18,436,024 -1,218,169 7.66
    2026-01-15 18,436,024 16,284,598 +2,151,426 6.13
    2025-12-31 16,284,598 12,204,357 +4,080,241 5.98
    2025-12-15 12,204,357 10,504,723 +1,699,634 4.34
    2025-11-28 10,504,723 8,731,864 +1,772,859 2.35
    2025-11-14 8,731,864 9,151,927 -420,063 4.53
    2025-10-31 9,151,927 10,188,623 -1,036,696 4.39

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1528115 CUSIP 03589W102 13F (30d) 15 filings 15 filers Visit website Investor relations