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Generate Biomedicines GENB

US equityMarket cap rank #2863Biotechnology
$13.91 +$0.22 (+1.61%)
Pre-market · Oct 6, 4:10 am ET · After hours $13.94 +0.20%
Open$13.71
Prev close$13.69
Day range$13.45 – $14.06
Volume1.12M
Market cap$1.79B
P/E (TTM)–
Dividend yield–

Ownership & positioning

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

Institutional ownership77.9%-0.41 pts vs. prior quarter
Institutions holding101-2 vs. prior quarter
Insider trades (recent)19 buys / 2 sellsNet buying
Short interest5.59% of floatDays to cover 7.2 · as of 15 Sep 2026
Short-sale volume share27.3%5-day average of daily volume

Short-sale volume as % of daily volume

18%24%29%35%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$9.43M (4 inflow days, 16 outflow days).

The five largest holders on file together own 61.0% of shares outstanding.

Largest holders

  • Flagship Pioneering, Inc48.83%
  • FMR4.07%
  • Capital Research3.28%
  • Braidwell LP2.56%
  • Michael Nally2.25%
  • T. Rowe Price Group, Inc.1.68%
  • Norges Bank Investment Management1.63%
  • Arch Venture Partners, L.P.1.51%

By investor type

  • VC/PE Fund53.95%
  • Mutual Fund15.96%
  • Hedge Fund5.21%
  • Individual/Insider4.07%
  • Sovereign Wealth Fund1.63%
  • Endowment Fund0.87%
  • Public Company0.26%
  • Private Company0.04%

Reported short interest has risen from 4.62% to 5.59% 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 7,180,013 5.6% 7.2
31 Aug 2026 7,456,033 5.8% 3.7
14 Aug 2026 7,286,295 5.7% 15.1
31 Jul 2026 7,275,413 5.7% 15.3
15 Jul 2026 6,985,520 5.4% 9.4
30 Jun 2026 5,916,840 4.6% 4.0

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