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Parabilis Medicines PBLS

US equityMarket cap rank #2341
$29.53 −$0.75 (-2.48%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $29.53 0.00%
Open$30.41
Prev close$30.28
Day range$28.56 – $30.82
Volume572.5K
Market cap$3.65B
P/E (TTM)–
Dividend yield–

Ownership & positioning

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

Institutional ownership84.6%-3.69 pts vs. prior quarter
Institutions holding86+0 vs. prior quarter
Insider trades (recent)23 buys / 0 sellsNet buying
Short interest4.93% of floatDays to cover 13.3 · as of 15 Sep 2026
Short-sale volume share29.5%5-day average of daily volume

Short-sale volume as % of daily volume

15%26%36%46%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$711.7K (11 inflow days, 9 outflow days).

The five largest holders on file together own 45.4% of shares outstanding.

Largest holders

  • RA Capital Management, L.P.23.62%
  • FMR8.33%
  • Arch Venture Partners, L.P.5.19%
  • venBio LLC4.26%
  • GV Management Company, LLC3.98%
  • Nextech Invest Ltd.3.77%
  • Cormorant Asset Management, LP3.74%
  • Mwg Management Ltd.3.70%

By investor type

  • VC/PE Fund50.86%
  • Mutual Fund19.91%
  • Hedge Fund10.43%
  • Public Company3.40%
  • Individual/Insider0.10%
  • Private Company0.00%
  • Family Office/Trust0.00%

Reported short interest has risen from 2.28% to 4.93% 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 6,092,212 4.9% 13.3
31 Aug 2026 5,517,704 4.5% 14.2
14 Aug 2026 5,257,000 4.3% 15.7
31 Jul 2026 5,117,574 4.2% 12.8
15 Jul 2026 3,954,390 3.3% 8.3
30 Jun 2026 2,769,824 2.3% 2.6

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