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PHAT · Phathom Pharmaceuticals, Inc. · Short Interest

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$6.28 +0.29 (+4.84%) At close · Oct 28 Earnings today Q2 2026 earnings call transcript
Russell 2000 member Rebalance outlook locked
Market Cap
$484.60M
Shares
80.90M
Volume · Oct 28 2.08M Avg daily vol (3M) 1.51M

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 →

PHAT Latest Reported Short Interest

FINRA reported 9,784,183 PHAT shares sold short as of the October 15, 2026 settlement date, a decrease of 324,968 shares. Days to cover was 6.93 based on FINRA's reported average daily volume.

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

PHAT Short Interest Forecast

Equibles' model estimates 10,026,282 shares sold short for the October 30, 2026 settlement, +2.5% versus the latest reported position, with a likely range of 9,106,043 to 11,128,346 shares. This model prediction uses FINRA data through October 28, 2026; FINRA's official release is expected November 10, 2026.

Model estimate

Expected Oct 30 short interest

as of Oct 28 High confidence 65% chance it rises
10,026,282 +2.5% vs reported
Likely range 9,106,043 to 11,128,346 The latest estimate appears in the chart below. Official release expected Nov 10. Methodology
Short Squeeze Score
67/100
Short interest 12.1% of shares — P92 Days to cover 6.9 — P79 Price vs VWAP -21.0% — P19 Short-volume trend -11.1% — P16 Short interest change -3.2% — P38 Worst FTD 0.01% of shares — P45 Earnings soon +10

Positioning score 56.7 + catalyst boost 10 (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 (2026-10-15). 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 2026-10-29 01:34 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
    2026-11-13 Scheduled
    FINRA publishes Nov 24
    		 — — — —
    2026-10-30 Scheduled
    FINRA publishes Nov 10
    		 — — — —
    2026-10-15 9,784,183 10,109,151 -324,968 6.93
    2026-09-30 10,109,151 10,157,209 -48,058 7.36
    2026-09-15 10,157,209 10,823,977 -666,768 9.11
    2026-08-31 10,823,977 11,773,979 -950,002 11.01
    2026-08-14 11,773,979 13,327,316 -1,553,337 6.87
    2026-07-31 13,327,316 12,121,682 +1,205,634 8.70
    2026-07-15 12,121,682 11,993,590 +128,092 9.00
    2026-06-30 11,993,590 11,162,619 +830,971 11.67
    2026-06-15 11,162,619 10,352,426 +810,193 10.36
    2026-05-29 10,352,426 10,288,317 +64,109 9.41
    2026-05-15 10,288,317 9,736,465 +551,852 8.68
    2026-04-30 9,736,465 9,502,963 +233,502 5.88
    2026-04-15 9,502,963 10,637,936 -1,134,973 9.92
    2026-03-31 10,637,936 11,657,728 -1,019,792 9.23
    2026-03-13 11,657,728 11,169,289 +488,439 10.93
    2026-02-27 11,169,289 11,718,291 -549,002 9.81
    2026-02-13 11,718,291 11,396,304 +321,987 14.85
    2026-01-30 11,396,304 10,523,193 +873,111 10.88
    2026-01-15 10,523,193 10,780,383 -257,190 6.48
    2025-12-31 10,780,383 12,677,843 -1,897,460 10.51
    2025-12-15 12,677,843 12,739,028 -61,185 15.98
    2025-11-28 12,739,028 13,078,808 -339,780 16.13
    2025-11-14 13,078,808 13,566,849 -488,041 14.33
    2025-10-31 13,566,849 14,125,695 -558,846 13.59

    Full FINRA short interest reporting calendar

    Showing 1–24 of 24 settlements
    Key facts CIK 1783183 CUSIP 71722W107 13F (30d) 19 filings 19 filers Visit website Investor relations