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CTMX · CytomX Therapeutics, Inc. · Short Interest

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$2.72 -0.03 (-1.09%) At close · Sep 30
Russell 2000 member Rebalance outlook locked
Market Cap
$598.13M
Shares
217.90M
Volume · Sep 30 3.22M Avg daily vol (3M) 3.49M

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 →

CTMX Latest Reported Short Interest

FINRA reported 38,639,220 CTMX shares sold short as of the September 15, 2026 settlement date, an increase of 5,126,927 shares. Days to cover was 9.29 based on FINRA's reported average daily volume.

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

CTMX Short Interest Forecast

Equibles' model estimates 42,351,475 shares sold short for the September 30, 2026 settlement, +9.6% versus the latest reported position, with a likely range of 38,199,180 to 47,606,728 shares. This model prediction uses FINRA data through September 30, 2026; FINRA's official release is expected October 9, 2026.

Model estimate

Expected Sep 30 short interest

as of Sep 30 High confidence 77% chance it rises
42,351,475 +9.6% vs reported
Likely range 38,199,180 to 47,606,728 The latest estimate appears in the chart below. Official release expected Oct 9. Methodology
Short Squeeze Score
79/100
Short interest 17.7% of shares — P97 Days to cover 9.3 — P86 Price vs VWAP -18.0% — P17 Short-volume trend +21.3% — P94 Short interest change +15.3% — P80 Worst FTD 0.06% of shares — P79

Positioning score 79.0 + 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 (2026-09-15). 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 2026-10-01 04:49 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
    2026-10-15 Scheduled
    FINRA publishes Oct 26
    		 — — — —
    2026-09-30 Scheduled
    FINRA publishes Oct 9
    		 — — — —
    2026-09-15 38,639,220 33,512,293 +5,126,927 9.29
    2026-08-31 33,512,293 34,619,999 -1,107,706 11.81
    2026-08-14 34,619,999 35,110,952 -490,953 15.93
    2026-07-31 35,110,952 40,322,256 -5,211,304 11.78
    2026-07-15 40,322,256 35,567,462 +4,754,794 10.38
    2026-06-30 35,567,462 30,605,562 +4,961,900 4.32
    2026-06-15 30,605,562 28,719,341 +1,886,221 8.65
    2026-05-29 28,719,341 31,133,767 -2,414,426 9.31
    2026-05-15 31,133,767 29,742,798 +1,390,969 10.32
    2026-04-30 29,742,798 27,517,975 +2,224,823 8.44
    2026-04-15 27,517,975 22,031,153 +5,486,822 5.41
    2026-03-31 22,031,153 20,415,174 +1,615,979 1.14
    2026-03-13 20,415,174 18,864,576 +1,550,598 7.10
    2026-02-27 18,864,576 16,961,879 +1,902,697 8.03
    2026-02-13 16,961,879 14,813,750 +2,148,129 4.66
    2026-01-30 14,813,750 16,118,163 -1,304,413 3.33
    2026-01-15 16,118,163 23,696,755 -7,578,592 7.49
    2025-12-31 23,696,755 16,770,738 +6,926,017 6.56
    2025-12-15 16,770,738 17,187,962 -417,224 9.20
    2025-11-28 17,187,962 29,319,732 -12,131,770 7.62
    2025-11-14 29,319,732 28,725,162 +594,570 5.59
    2025-10-31 28,725,162 28,399,194 +325,968 12.11
    2025-10-15 28,399,194 31,366,190 -2,966,996 8.58

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1501989 CUSIP 23284F105 13F (30d) 3 filings 3 filers Visit website Investor relations