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ZENAS BIOPHARMA INC (ZBIO) Stock Ownership and Short Interest

USA - Nasdaq - NASDAQ:ZBIO - US98937L1052 - Common Stock

39.38 USD
+1.27 (+3.33%)
Last: 12/5/2025, 8:00:02 PM
39.98 USD
+0.6 (+1.52%)
After Hours: 12/5/2025, 8:00:02 PM
ZBIO Ownership Chart.ZBIO Ownership Chart: showing Insider, Institutional ownership and shares available to the public.ZBIO Ownership.InsiderInstitutionalPublic



Shares Outstanding53.68M
Float39.61M
Float Short Interest Percentage11.63%
Owners (insider)0.8%
Owners (institutional)78.01%
Owners (insider) change0.2%
Owners (institutional) change2.11%
ZBIO Institutional Ownership HistoryZBIO Institutional Ownership HistoryZBIO Institutional Ownership History Sep 2024 Dec 2024 Mar 2025 Jun 2025 Sep 2025 10M 20M 30M
ZBIO Historical Insider Transactions ChartZBIO Historical Insider Buy and Sell Transactions ChartZBIO Historical Insider Transactions Jan 2025 Feb 2025 Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 500K 1M 1.5M
Date Name Type Shares Price Amount
Oct 9, 2025 ENRIGHT PATRICK G Open Market Purchase 117255 19.19 $ 2,250,026.50
Oct 9, 2025 Nunn Jason Raleigh Open Market Purchase 63158 19.00 $ 1,200,002.00
Oct 9, 2025 SR ONE CAPITAL MANAGEMENT, LLC Open Market Purchase 126315 19.00 $ 2,399,985.00
Oct 9, 2025 George Simeon Open Market Purchase 126315 19.00 $ 2,399,985.00
Oct 7, 2025 MOULDER LEON O JR Open Market Purchase 36928 20.85 $ 769,948.80
Oct 7, 2025 Lu Hongbo Open Market Purchase 263160 19.00 $ 5,000,040.00
Oct 7, 2025 Fairmount Funds Management LLC Open Market Purchase 316219 19.00 $ 6,008,161.00
Oct 7, 2025 Fairmount Healthcare Fund II L.P. Open Market Purchase 316219 19.00 $ 6,008,161.00
Oct 7, 2025 Kiselak Tomas Open Market Purchase 316219 19.00 $ 6,008,161.00
Oct 7, 2025 Harwin Peter Evan Open Market Purchase 316219 19.00 $ 6,008,161.00
Feb 18, 2025 MOULDER LEON O JR Open Market Purchase 25000 6.67 $ 166,750.00
Feb 7, 2025 Xiao Ting Open Market Purchase 10000 7.76 $ 77,600.00