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CERS · Cerus Corp · Short Interest

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$1.99 +0.05 (+2.32%) At close · Nov 13 Play latest call Q3 2026 earnings call transcript
Russell 2000 member Rebalance outlook locked
Market Cap
$400.88M
Shares
201.95M
Volume · Nov 13 1.82M Avg daily vol (3M) 1.94M

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 →

CERS Latest Reported Short Interest

FINRA reported 14,631,896 CERS shares sold short as of the October 30, 2026 settlement date, a decrease of 1,996,761 shares. Days to cover was 8.18 based on FINRA's reported average daily volume.

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

CERS Short Interest Forecast

Equibles' model estimates 14,505,076 shares sold short for the November 13, 2026 settlement, -0.9% versus the latest reported position, with a likely range of 12,653,234 to 16,481,241 shares. This model prediction uses FINRA data through November 13, 2026; FINRA's official release is expected November 24, 2026.

Model estimate

Expected Nov 13 short interest

as of Nov 13 Low confidence 47% chance it rises
14,505,076 -0.9% vs reported
Likely range 12,653,234 to 16,481,241 The latest estimate appears in the chart below. Official release expected Nov 24. Methodology
Short Squeeze Score
56/100
Short interest 7.2% of shares — P81 Days to cover 8.2 — P84 Price vs VWAP -18.3% — P28 Short-volume trend -1.6% — P47 Short interest change -12.0% — P22 Worst FTD 0.00% of shares — P18

Positioning score 56.5 + 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 (2026-10-30). 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 2026-11-15 06:00 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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Dimensions
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    • Short Interest History

    Settlement Date Current Position Previous Position Change Days to Cover
    2026-11-30 Scheduled
    FINRA publishes Dec 9
    		 — — — —
    2026-11-13 Scheduled
    FINRA publishes Nov 24
    		 — — — —
    2026-10-30 14,631,896 16,628,657 -1,996,761 8.18
    2026-10-15 16,628,657 17,580,423 -951,766 9.39
    2026-09-30 17,580,423 17,994,821 -414,398 8.03
    2026-09-15 17,994,821 17,717,716 +277,105 16.58
    2026-08-31 17,717,716 17,330,786 +386,930 10.02
    2026-08-14 17,330,786 14,960,162 +2,370,624 5.07
    2026-07-31 14,960,162 13,688,689 +1,271,473 5.71
    2026-07-15 13,688,689 12,738,396 +950,293 5.50
    2026-06-30 12,738,396 19,696,885 -6,958,489 4.14
    2026-06-15 19,696,885 10,766,701 +8,930,184 8.49
    2026-05-29 10,766,701 18,522,745 -7,756,044 4.24
    2026-05-15 18,522,745 11,273,044 +7,249,701 4.00
    2026-04-30 11,273,044 11,204,876 +68,168 10.51
    2026-04-15 11,204,876 11,119,137 +85,739 12.45
    2026-03-31 11,119,137 10,511,205 +607,932 6.30
    2026-03-13 10,511,205 7,781,596 +2,729,609 3.61
    2026-02-27 7,781,596 7,818,308 -36,712 5.69
    2026-02-13 7,818,308 6,725,116 +1,093,192 8.01
    2026-01-30 6,725,116 7,143,959 -418,843 5.93
    2026-01-15 7,143,959 6,714,909 +429,050 3.62
    2025-12-31 6,714,909 6,239,300 +475,609 4.85
    2025-12-15 6,239,300 5,838,160 +401,140 3.60
    2025-11-28 5,838,160 5,720,796 +117,364 4.46

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1020214 CUSIP 157085101 13F (30d) 142 filings 121 filers Visit website Investor relations