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Zai Lab ZLAB

US equityMarket cap rank #2518
$25.62 +$1.29 (+5.30%)
Pre-market · Oct 6, 6:00 am ET · After hours $26.00 +1.48%
Open$24.44
Prev close$24.33
Day range$24.33 – $25.65
Volume787.4K
Market cap$2.88B
P/E (TTM)–
Dividend yield–

Ownership & positioning

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

Institutional ownership78.5%+0.89 pts vs. prior quarter
Institutions holding192-2 vs. prior quarter
Insider trades (recent)19 buys / 31 sellsNet selling
Short interest7.27% of floatDays to cover 9.2 · as of 15 Sep 2026
Short-sale volume share16.7%5-day average of daily volume

Short-sale volume as % of daily volume

6%13%20%26%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$690.9K (10 inflow days, 10 outflow days).

The five largest holders on file together own 25.6% of shares outstanding.

Largest holders

  • RTW Investments, LP5.86%
  • TCG Crossover Management, LLC5.47%
  • Baillie Gifford5.27%
  • FMR4.63%
  • Qiming Weichuang Venture Capital Management (Shanghai) Company Limited4.35%
  • RA Capital Management, L.P.4.21%
  • Vanguard Capital Management, LLC3.89%
  • The Goldman Sachs Group, Inc.3.27%

By investor type

  • Mutual Fund36.50%
  • VC/PE Fund16.59%
  • Hedge Fund15.48%
  • Public Company6.46%
  • Sovereign Wealth Fund2.65%
  • Individual/Insider2.18%
  • Private Company0.83%
  • Family Office/Trust0.00%

Reported short interest has held roughly steady near 7.27% 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 8,156,879 7.3% 9.2
31 Aug 2026 8,017,185 7.1% 7.3
14 Aug 2026 7,465,887 6.7% 5.4
31 Jul 2026 6,534,451 5.8% 10.9
15 Jul 2026 6,351,893 5.7% 7.5
30 Jun 2026 8,154,038 7.3% 8.0

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