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VIR · Vir Biotechnology, Inc. · Short Interest

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$11.17 -0.12 (-1.06%) At close · Oct 2
S&P 600 member Russell 2000 member Rebalance outlook locked
Market Cap
$1.80B
Shares
169.22M
Volume · Oct 2 2.18M Avg daily vol (3M) 1.83M

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 →

VIR Latest Reported Short Interest

FINRA reported 19,660,671 VIR shares sold short as of the September 15, 2026 settlement date, a decrease of 1,680,837 shares. Days to cover was 9.47 based on FINRA's reported average daily volume.

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

VIR Short Interest Forecast

Equibles' model estimates 19,702,009 shares sold short for the September 30, 2026 settlement, +0.2% versus the latest reported position, with a likely range of 17,993,127 to 21,436,306 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 66% chance it falls
19,702,009 +0.2% vs reported
Likely range 17,993,127 to 21,436,306 The latest estimate appears in the chart below. Official release expected Oct 9. Methodology
Short Squeeze Score
74/100
Short interest 11.6% of shares — P91 Days to cover 9.5 — P87 Price vs VWAP +9.6% — P91 Short-volume trend +4.0% — P62 Short interest change -7.9% — P24 Worst FTD 0.00% of shares — P38

Positioning score 73.9 + 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 2026-10-03 16:52 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 19,660,671 21,341,508 -1,680,837 9.47
    2026-08-31 21,341,508 19,595,909 +1,745,599 11.10
    2026-08-14 19,595,909 19,040,209 +555,700 13.62
    2026-07-31 19,040,209 18,452,974 +587,235 12.24
    2026-07-15 18,452,974 19,192,724 -739,750 11.97
    2026-06-30 19,192,724 18,082,921 +1,109,803 5.98
    2026-06-15 18,082,921 18,316,762 -233,841 11.93
    2026-05-29 18,316,762 16,833,002 +1,483,760 10.81
    2026-05-15 16,833,002 16,117,209 +715,793 10.95
    2026-04-30 16,117,209 16,811,002 -693,793 9.74
    2026-04-15 16,811,002 16,841,179 -30,177 8.79
    2026-03-31 16,841,179 15,439,503 +1,401,676 7.69
    2026-03-13 15,439,503 13,677,336 +1,762,167 3.67
    2026-02-27 13,677,336 12,779,376 +897,960 1.76
    2026-02-13 12,779,376 12,228,838 +550,538 8.75
    2026-01-30 12,228,838 11,995,546 +233,292 6.03
    2026-01-15 11,995,546 11,747,085 +248,461 6.35
    2025-12-31 11,747,085 11,149,646 +597,439 6.40
    2025-12-15 11,149,646 11,110,359 +39,287 5.66
    2025-11-28 11,110,359 10,992,709 +117,650 6.96
    2025-11-14 10,992,709 9,581,029 +1,411,680 7.99
    2025-10-31 9,581,029 10,940,671 -1,359,642 6.21
    2025-10-15 10,940,671 10,948,379 -7,708 7.71

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1706431 CUSIP 92764N102 13F (30d) 6 filings 6 filers Visit website Investor relations