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PFE · Pfizer Inc · Short Interest

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$28.59 -0.13 (-0.45%) At close · Sep 30
S&P 500 member Russell 1000 member Rebalance outlook locked
Market Cap
$163.41B
Shares
5.70B
Volume · Sep 30 33.65M Avg daily vol (3M) 37.77M

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 →

PFE Latest Reported Short Interest

FINRA reported 155,202,257 PFE shares sold short as of the September 15, 2026 settlement date, an increase of 3,664,367 shares. Days to cover was 4.90 based on FINRA's reported average daily volume.

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

PFE Short Interest Forecast

Equibles' model estimates 155,949,500 shares sold short for the September 30, 2026 settlement, +0.5% versus the latest reported position, with a likely range of 140,185,976 to 172,205,933 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 Low confidence 62% chance it falls
155,949,500 +0.5% vs reported
Likely range 140,185,976 to 172,205,933 The latest estimate appears in the chart below. Official release expected Oct 9. Methodology
Short Squeeze Score
65/100
Short interest 2.7% of shares — P55 Days to cover 4.9 — P63 Price vs VWAP +9.1% — P91 Short-volume trend +10.6% — P82 Short interest change +2.4% — P54 Worst FTD 0.00% of shares — P44

Positioning score 64.9 + 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 01:50 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
    2026-10-15 Scheduled
    FINRA publishes Oct 26
    		 — — — —
    2026-09-30 Scheduled
    FINRA publishes Oct 9
    		 — — — —
    2026-09-15 155,202,257 151,537,890 +3,664,367 4.90
    2026-08-31 151,537,890 149,271,132 +2,266,758 4.33
    2026-08-14 149,271,132 161,478,227 -12,207,095 3.53
    2026-07-31 161,478,227 163,820,439 -2,342,212 4.18
    2026-07-15 163,820,439 163,578,117 +242,322 3.83
    2026-06-30 163,578,117 162,075,723 +1,502,394 2.69
    2026-06-15 162,075,723 162,659,281 -583,558 4.60
    2026-05-29 162,659,281 157,459,584 +5,199,697 4.96
    2026-05-15 157,459,584 140,316,585 +17,142,999 4.12
    2026-04-30 140,316,585 133,414,052 +6,902,533 4.01
    2026-04-15 133,414,052 132,465,697 +948,355 3.99
    2026-03-31 132,465,697 131,409,882 +1,055,815 3.08
    2026-03-13 131,409,882 142,846,663 -11,436,781 3.25
    2026-02-27 142,846,663 146,379,047 -3,532,384 4.07
    2026-02-13 146,379,047 143,036,062 +3,342,985 2.52
    2026-01-30 143,036,062 129,801,593 +13,234,469 2.78
    2026-01-15 129,801,593 130,020,324 -218,731 2.73
    2025-12-31 130,020,324 139,486,093 -9,465,769 2.74
    2025-12-15 139,486,093 139,072,627 +413,466 2.97
    2025-11-28 139,072,627 130,660,363 +8,412,264 2.50
    2025-11-14 130,660,363 126,587,750 +4,072,613 1.04
    2025-10-31 126,587,750 116,815,571 +9,772,179 2.13
    2025-10-15 116,815,571 113,954,344 +2,861,227 1.84

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 78003 CUSIP 717081103 13F (30d) 85 filings 33 filers Visit website Investor relations