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PCVX · Vaxcyte, Inc. · Short Interest

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$56.48 +0.43 (+0.77%) At close · Oct 2
Russell 2000 member Rebalance outlook locked
Market Cap
$8.36B
Shares
148.81M
Volume · Oct 2 2.4M Avg daily vol (3M) 1.15M

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 →

PCVX Latest Reported Short Interest

FINRA reported 16,132,520 PCVX shares sold short as of the September 15, 2026 settlement date, an increase of 1,116,006 shares. Days to cover was 13.04 based on FINRA's reported average daily volume.

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

PCVX Short Interest Forecast

Equibles' model estimates 16,872,190 shares sold short for the September 30, 2026 settlement, +4.6% versus the latest reported position, with a likely range of 15,040,236 to 18,692,349 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 Medium confidence 58% chance it rises
16,872,190 +4.6% vs reported
Likely range 15,040,236 to 18,692,349 The latest estimate appears in the chart below. Official release expected Oct 9. Methodology
Short Squeeze Score
82/100
Short interest 10.8% of shares — P90 Days to cover 13.0 — P93 Price vs VWAP -3.1% — P59 Short-volume trend +17.3% — P91 Short interest change +7.4% — P68 Worst FTD 0.03% of shares — P67

Positioning score 81.8 + 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 2026-10-03 13:30 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 16,132,520 15,016,514 +1,116,006 13.04
    2026-08-31 15,016,514 14,796,265 +220,249 15.86
    2026-08-14 14,796,265 14,464,951 +331,314 15.85
    2026-07-31 14,464,951 14,231,919 +233,032 14.82
    2026-07-15 14,231,919 17,468,070 -3,236,151 12.37
    2026-06-30 17,468,070 14,629,103 +2,838,967 6.91
    2026-06-15 14,629,103 14,473,801 +155,302 10.73
    2026-05-29 14,473,801 13,789,778 +684,023 8.85
    2026-05-15 13,789,778 14,143,473 -353,695 7.75
    2026-04-30 14,143,473 14,356,548 -213,075 13.09
    2026-04-15 14,356,548 13,685,643 +670,905 11.75
    2026-03-31 13,685,643 13,067,798 +617,845 9.77
    2026-03-13 13,067,798 13,257,134 -189,336 10.89
    2026-02-27 13,257,134 13,755,621 -498,487 10.72
    2026-02-13 13,755,621 11,953,116 +1,802,505 7.85
    2026-01-30 11,953,116 12,095,806 -142,690 7.51
    2026-01-15 12,095,806 11,905,942 +189,864 12.49
    2025-12-31 11,905,942 10,827,314 +1,078,628 9.81
    2025-12-15 10,827,314 10,301,208 +526,106 6.62
    2025-11-28 10,301,208 9,336,796 +964,412 7.67
    2025-11-14 9,336,796 8,574,767 +762,029 6.34
    2025-10-31 8,574,767 10,013,969 -1,439,202 6.57
    2025-10-15 10,013,969 11,081,540 -1,067,571 4.79

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1649094 CUSIP 92243G108 13F (30d) 8 filings 8 filers Visit website Investor relations