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SNDX · Syndax Pharmaceuticals Inc · Short Interest

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$12.90 -0.75 (-5.49%) At close · Oct 16
Russell 2000 member Rebalance outlook locked
Market Cap
$1.15B
Shares
89.30M
Volume · Oct 16 2.84M Avg daily vol (3M) 1.67M

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 →

SNDX Latest Reported Short Interest

FINRA reported 18,234,880 SNDX shares sold short as of the September 30, 2026 settlement date, a decrease of 2,425,569 shares. Days to cover was 8.47 based on FINRA's reported average daily volume.

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

SNDX Short Interest Forecast

Equibles' model estimates 18,746,786 shares sold short for the October 15, 2026 settlement, +2.8% versus the latest reported position, with a likely range of 16,773,405 to 20,861,083 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 47% chance it rises
18,746,786 +2.8% vs reported
Likely range 16,773,405 to 20,861,083 The latest estimate appears in the chart below. Official release expected Oct 26. Methodology
Short Squeeze Score
61/100
Short interest 20.4% of shares — P98 Days to cover 8.5 — P88 Price vs VWAP -29.4% — P13 Short-volume trend +1.6% — P59 Short interest change -11.7% — P22 Worst FTD 0.00% of shares — P8

Positioning score 60.7 + 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.

No listed expiration after today falls within the next 30 calendar days.

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 2026-10-17 12:05 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
    2026-10-30 Scheduled
    FINRA publishes Nov 10
    		 — — — —
    2026-10-15 Scheduled
    FINRA publishes Oct 26
    		 — — — —
    2026-09-30 18,234,880 20,660,449 -2,425,569 8.47
    2026-09-15 20,660,449 21,681,907 -1,021,458 14.73
    2026-08-31 21,681,907 22,902,431 -1,220,524 19.65
    2026-08-14 22,902,431 22,665,216 +237,215 15.03
    2026-07-31 22,665,216 20,816,110 +1,849,106 18.58
    2026-07-15 20,816,110 21,812,785 -996,675 9.83
    2026-06-30 21,812,785 19,855,525 +1,957,260 8.56
    2026-06-15 19,855,525 16,637,071 +3,218,454 9.10
    2026-05-29 16,637,071 21,712,664 -5,075,593 16.02
    2026-05-15 21,712,664 19,911,327 +1,801,337 10.54
    2026-04-30 19,911,327 20,968,088 -1,056,761 12.66
    2026-04-15 20,968,088 20,695,810 +272,278 15.24
    2026-03-31 20,695,810 20,485,613 +210,197 13.63
    2026-03-13 20,485,613 21,798,656 -1,313,043 13.48
    2026-02-27 21,798,656 22,117,950 -319,294 19.86
    2026-02-13 22,117,950 21,147,220 +970,730 17.85
    2026-01-30 21,147,220 22,344,466 -1,197,246 17.22
    2026-01-15 22,344,466 22,569,116 -224,650 16.06
    2025-12-31 22,569,116 22,826,193 -257,077 18.21
    2025-12-15 22,826,193 25,221,608 -2,395,415 12.48
    2025-11-28 25,221,608 25,622,767 -401,159 10.65
    2025-11-14 25,622,767 25,344,944 +277,823 7.59
    2025-10-31 25,344,944 22,023,042 +3,321,902 5.92

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1395937 CUSIP 87164F105 13F (30d) 17 filings 17 filers Visit website Investor relations