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Vir Biotechnology, Inc.

VIR
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001706431

In the last 90 days, Vir Biotechnology, Inc. insiders filed 0 open-market purchases and 1 sale; 237 institutions reported holding it in 13F filings for Q2 2026, worth $1.49B in total; no superinvestor holds it.

Four kinds of short-selling data, each measuring something different:

  • Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
  • Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
  • Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
  • ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.

More in the glossary.

Short interest

Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.

Short interest
16.9M
Shares, settlement Oct 30, 2026
Change
+637.7K
+3.9% vs. Oct 15, 2026
Days to cover
11.86
Short interest ÷ average daily volume
Average daily volume
1.42M
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 5,721,806 sharesNov 15, 2024: 5,512,667 sharesNov 29, 2024: 6,163,469 sharesDec 13, 2024: 6,080,890 sharesDec 31, 2024: 6,553,893 sharesJan 15, 2025: 7,855,176 sharesJan 31, 2025: 7,637,202 sharesFeb 14, 2025: 7,670,907 sharesFeb 28, 2025: 7,765,641 sharesMar 14, 2025: 7,880,284 sharesMar 31, 2025: 10,114,413 sharesApr 15, 2025: 10,167,231 sharesApr 30, 2025: 10,311,284 sharesMay 15, 2025: 10,942,673 sharesMay 30, 2025: 11,520,255 sharesJun 13, 2025: 11,367,540 sharesJun 30, 2025: 11,221,883 sharesJul 15, 2025: 11,294,318 sharesJul 31, 2025: 11,139,128 sharesAug 15, 2025: 11,487,884 sharesAug 29, 2025: 11,924,295 sharesSep 15, 2025: 11,852,892 sharesSep 30, 2025: 10,948,379 sharesOct 15, 2025: 10,940,671 sharesOct 31, 2025: 9,581,029 sharesNov 14, 2025: 10,992,709 sharesNov 28, 2025: 11,110,359 sharesDec 15, 2025: 11,149,646 sharesDec 31, 2025: 11,747,085 sharesJan 15, 2026: 11,995,546 sharesJan 30, 2026: 12,228,838 sharesFeb 13, 2026: 12,779,376 sharesFeb 27, 2026: 13,677,336 sharesMar 13, 2026: 15,439,503 sharesMar 31, 2026: 16,841,179 sharesApr 15, 2026: 16,811,002 sharesApr 30, 2026: 16,117,209 sharesMay 15, 2026: 16,833,002 sharesMay 29, 2026: 18,316,762 sharesJun 15, 2026: 18,082,921 sharesJun 30, 2026: 19,192,724 sharesJul 15, 2026: 18,452,974 sharesJul 31, 2026: 19,040,209 sharesAug 14, 2026: 19,595,909 sharesAug 31, 2026: 21,341,508 sharesSep 15, 2026: 19,660,671 sharesSep 30, 2026: 14,980,532 sharesOct 15, 2026: 16,236,717 sharesOct 30, 2026: 16,874,443 shares
Short interest in VIR by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 202616.9M+637.7K+3.9%1.42M11.86
Oct 15, 202616.2M+1.26M+8.4%2.35M6.92
Sep 30, 202615.0M−4.68M−23.8%2.14M7.01
Sep 15, 202619.7M−1.68M−7.9%2.08M9.47
Aug 31, 202621.3M+1.75M+8.9%1.92M11.10
Aug 14, 202619.6M+555.7K+2.9%1.44M13.62
Jul 31, 202619.0M+587.2K+3.2%1.56M12.24
Jul 15, 202618.5M−739.8K−3.9%1.54M11.97
Jun 30, 202619.2M+1.11M+6.1%3.21M5.98
Jun 15, 202618.1M−233.8K−1.3%1.52M11.93
May 29, 202618.3M+1.48M+8.8%1.69M10.81
May 15, 202616.8M+715.8K+4.4%1.54M10.95
Apr 30, 202616.1M−693.8K−4.1%1.66M9.74
Apr 15, 202616.8M−30.2K−0.2%1.91M8.79
Mar 31, 202616.8M+1.40M+9.1%2.19M7.69
Mar 13, 202615.4M+1.76M+12.9%4.21M3.67
Feb 27, 202613.7M+898.0K+7.0%7.78M1.76
Feb 13, 202612.8M+550.5K+4.5%1.46M8.75
Jan 30, 202612.2M+233.3K+1.9%2.03M6.03
Jan 15, 202612.0M+248.5K+2.1%1.89M6.35
Dec 31, 202511.7M+597.4K+5.4%1.83M6.40
Dec 15, 202511.1M+39.3K+0.4%1.97M5.66
Nov 28, 202511.1M+117.7K+1.1%1.60M6.96
Nov 14, 202511.0M+1.41M+14.7%1.38M7.99
Oct 31, 20259.58M−1.36M−12.4%1.54M6.21
Oct 15, 202510.9M−7.71K−0.1%1.42M7.71
Sep 30, 202510.9M−904.5K−7.6%1.19M9.22
Sep 15, 202511.9M−71.4K−0.6%1.24M9.59
Aug 29, 202511.9M+436.4K+3.8%1.85M6.45
Aug 15, 202511.5M+348.8K+3.1%1.17M9.80
Jul 31, 202511.1M−155.2K−1.4%978.9K11.38
Jul 15, 202511.3M+72.4K+0.7%1.27M8.92
Jun 30, 202511.2M−145.7K−1.3%1.17M9.61
Jun 13, 202511.4M−152.7K−1.3%1.15M9.88
May 30, 202511.5M+577.6K+5.3%1.52M7.55
May 15, 202510.9M+631.4K+6.1%1.62M6.77
Apr 30, 202510.3M+144.1K+1.4%911.3K11.32
Apr 15, 202510.2M+52.8K+0.5%1.39M7.29
Mar 31, 202510.1M+2.23M+28.4%1.35M7.48
Mar 14, 20257.88M+114.6K+1.5%1.23M6.39
Feb 28, 20257.77M+94.7K+1.2%1.09M7.16
Feb 14, 20257.67M+33.7K+0.4%1.26M6.11
Jan 31, 20257.64M−218.0K−2.8%1.42M5.39
Jan 15, 20257.86M+1.30M+19.9%6.42M1.22
Dec 31, 20246.55M+473.0K+7.8%1.14M5.76
Dec 13, 20246.08M−82.6K−1.3%1.77M3.44
Nov 29, 20246.16M+650.8K+11.8%1.37M4.49
Nov 15, 20245.51M−209.1K−3.7%1.69M3.27
Oct 31, 20245.72M+171.6K+3.1%893.3K6.41

Fails-to-deliver

Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.

Fails-to-deliver in VIR by settlement date
Settlement dateSharesPriceValue
Oct 6, 202684,198$11.78$991.9K
Aug 31, 202636$10.83$389.88
Aug 19, 20265,093$9.49$48.3K
Aug 17, 202672$9.24$665.28
Aug 11, 20261,445$8.89$12.8K
Aug 6, 2026183$9.11$1.67K
Aug 4, 202612,632$8.90$112.4K
Jul 31, 202622$8.90$195.8
Jul 30, 202622$8.64$190.08
Jul 24, 202619,975$9.34$186.6K
Jul 22, 20265,900$9.42$55.6K
Jul 20, 202681,409$9.43$767.7K
Jul 16, 20264$9.61$38.44
Jul 9, 2026114$10.43$1.19K
Jul 7, 2026715$10.02$7.16K
Jul 2, 20261,593$9.56$15.2K
Jul 1, 2026363$10.19$3.70K
Jun 29, 202623,672$10.03$237.4K
Jun 24, 20263,817$10.16$38.8K
Jun 23, 202655,067$9.57$527.0K
Jun 22, 202657,296$9.16$524.8K
Jun 18, 20261$9.30$9.3
Jun 15, 2026370$8.61$3.19K
Jun 8, 202625,698$8.65$222.3K
Jun 3, 20264,952$8.74$43.3K
Jun 2, 20264,520$9.03$40.8K
May 22, 2026142$9.03$1.28K
May 12, 20261,326$9.29$12.3K
Apr 22, 202673$10.83$790.59
Apr 20, 20261,000$10.75$10.8K

Daily short volume

Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.

The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.

Off-exchange short volume in VIR by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026260,8043,011572,14145.6%
Nov 9, 20261,690,0726,5213,131,74854.0%
Nov 6, 2026339,3120577,84558.7%
Nov 5, 2026619,80039968,65964.0%
Nov 4, 2026617,652400841,55173.4%
Nov 3, 2026294,04489445,19466.0%
Nov 2, 2026330,7112,118504,49265.6%
Oct 30, 2026228,881415364,71762.8%
Oct 29, 2026338,72030538,14962.9%
Oct 28, 2026254,8434,770469,24354.3%
Oct 27, 2026349,1910655,90753.2%
Oct 26, 2026388,0850583,89666.5%
Oct 23, 2026416,0150605,26368.7%
Oct 22, 2026225,04283375,69859.9%
Oct 21, 2026258,0140384,76167.1%
Oct 20, 2026348,773149551,89663.2%
Oct 19, 2026240,8840437,66455.0%
Oct 16, 2026443,944309585,50675.8%
Oct 15, 2026336,2420553,12560.8%
Oct 14, 2026839,33101,082,21077.6%
Oct 13, 2026241,66410604,31740.0%
Oct 12, 2026202,876100334,77360.6%
Oct 9, 2026354,0124,300673,65152.6%
Oct 8, 2026444,5490817,15554.4%
Oct 7, 2026436,1501,938862,38150.6%
Oct 6, 2026565,5140924,54461.2%
Oct 5, 2026657,6256001,010,55965.1%
Oct 2, 2026404,52737624,09964.8%
Oct 1, 2026553,55501,008,41254.9%
Sep 30, 2026385,4521,014564,79168.2%

ATS (dark pool) volume

Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.

Weekly ATS and OTC volume in VIR
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T22,551,36543,1092,407,1208,95951.5%
Sep 28, 2026T22,517,50741,7601,066,8067,33270.2%
Sep 21, 2026T21,989,94936,213896,5536,92568.9%
Sep 14, 2026T22,346,28046,5451,778,6026,68656.9%
Sep 7, 2026T22,060,73744,0141,086,5526,76165.5%
Aug 31, 2026T23,529,04439,3881,659,0567,54768.0%
Aug 24, 2026T22,278,57340,8291,995,1259,23653.3%
Aug 17, 2026T21,893,28133,5501,373,5666,14158.0%
Aug 10, 2026T21,498,92835,921868,6134,88663.3%
Aug 3, 2026T21,842,49636,9681,112,6556,04662.3%
Jul 27, 2026T21,389,02835,4321,135,7075,07255.0%
Jul 20, 2026T21,671,77739,9491,885,6374,83547.0%