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Vir Biotechnology VIR

US equityMarket cap rank #2779Biotechnology
$11.78 +$0.61 (+5.46%)
Pre-market · Oct 6, 4:10 am ET · After hours $11.75 -0.25%
Open$11.17
Prev close$11.17
Day range$10.92 – $11.87
Volume3.15M
Market cap$1.99B
P/E (TTM)–
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership88.5%-0.85 pts vs. prior quarter
Institutions holding286-1 vs. prior quarter
Insider trades (recent)18 buys / 31 sellsNet selling
Short interest11.62% of floatDays to cover 9.5 · as of 15 Sep 2026
Short-sale volume share24.1%5-day average of daily volume

Short-sale volume as % of daily volume

19%24%29%33%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$5.08M (8 inflow days, 12 outflow days).

The five largest holders on file together own 38.9% of shares outstanding.

Largest holders

  • BlackRock12.22%
  • Arch Venture Partners, L.P.7.50%
  • Vanguard Portfolio Management, LLC6.79%
  • SB Investment Advisers (UK) Limited6.47%
  • State Street Global Advisors5.89%
  • GSK Equity Investments, Limited5.05%
  • Vanguard Capital Management, LLC4.27%
  • Point72 Asset Management, L.P.3.35%

By investor type

  • Mutual Fund48.09%
  • VC/PE Fund20.64%
  • Hedge Fund13.88%
  • Individual/Insider4.23%
  • Public Company3.32%
  • Private Company1.01%
  • Insurance Company0.80%
  • Government Pension Fund0.70%

Reported short interest has risen from 11.38% to 11.62% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 19,660,671 11.6% 9.5
31 Aug 2026 21,341,508 12.6% 11.1
14 Aug 2026 19,595,909 11.6% 13.6
31 Jul 2026 19,040,209 11.3% 12.2
15 Jul 2026 18,452,974 10.9% 12.0
30 Jun 2026 19,192,724 11.4% 6.0

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