Zenas Biopharma Inc

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Zenas Biopharma Inc
TickerZBIO
CIK #0001953926
CUSIP74347B193
SectorLife Sciences - Pharmaceutical Preparations
Address1000 Winter St, Suite 1200, Waltham, MA 02451
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Zenas Biopharma Inc 2024-05-14 200.1 M Exemption: 506(b) · Duration: One year or less · Revenue: Decline to Disclose
Zenas Biopharma Cayman Ltd 2022-11-15 183.9 M Exemption: 506(b) · Duration: One year or less · Revenue: Decline to Disclose
CIK Filing 2011 - 2026
[0001953926] 10-K
[0001953926] 10-Q
[0001953926] 3
[0001953926] 4
[0001953926] 8-K
[0001953926] D
[0001953926] SC 13D
[0001953926] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Moulder Leon O Jr Zenas Biopharma Inc [2026-05-05] 0.0
Moulder Leon O Jr Zenas Biopharma Inc [2026-01-14] 0.0
Innocare Pharma Inc Zenas Biopharma Inc [2025-10-15] 0.0
Moulder Leon O Jr Zenas Biopharma Inc [2025-06-06] 0.0
Novo Holdings A/S Zenas Biopharma Inc [2025-04-01] 0.0
FMR LLC Zenas Biopharma Inc [2024-11-12] 0.0
Xencor Inc Zenas Biopharma Inc [2024-10-21] 7.4
NEA 18 Venture Growth Equity LP Zenas Biopharma Inc [2024-09-25] 6.6
Enavate Sciences GP LLC Zenas Biopharma Inc [2024-09-23] 0.0
Longitude Capital Partners IV LLC Zenas Biopharma Inc [2024-09-23] 11.0
SR One Capital Management LLC Zenas Biopharma Inc [2024-09-23] 819412.3
Form 3/4/5 Filer 2011 - 2026
Orloff John J
Zenas BioPharma Inc
von Moltke Lisa
Fox Jennifer A
Nunn Jason Raleigh
Farmer Joseph L
Enright Patrick G
Boylan James P
Allen Patricia L
Lu Hongbo
Moulder Leon O Jr
Kiselak Tomas
Fairmount Funds Management LLC
Harwin Peter Evan
Fairmount Healthcare Fund II LP
InnoCare Pharma Inc
George Simeon
SR One Capital Management LLC
Oliveira Orlando
Xiao Ting
Wellington Biomedical Innovation Master Investors Cayman I
Enavate Sciences GP LLC
Zebra Aggregator LP
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Moulder Leon O Jr
Common Stock
2026-03-31 Buy 34,000 $19.31 656,540
Lu Hongbo
Common Stock
2026-03-31 Buy 75,000 $20.00 1,500,000
Moulder Leon O Jr
Common Stock
2026-03-30 Buy 20,000 $18.23 364,600
Allen Patricia L
Common Stock
2026-02-13 Buy 4,160 $26.36 109,658
Allen Patricia L
Common Stock
2026-02-12 Buy 5,700 $24.34 138,738
Allen Patricia L
Common Stock
2026-02-12 Buy 5,000 $23.77 118,850
Allen Patricia L
Common Stock
2026-02-12 Buy 5,000 $26.50 132,500
Lu Hongbo
Common Stock
2026-02-11 Buy 25,985 $22.50 584,662
Moulder Leon O Jr
Common Stock
2026-02-02 Buy 57,000 $17.96 1,023,720
Moulder Leon O Jr
Common Stock
2026-01-09 Buy 20,000 $16.55 331,000
Moulder Leon O Jr
Common Stock
2026-01-08 Buy 30,000 $16.30 489,000
Moulder Leon O Jr
Common Stock
2026-01-07 Buy 50,000 $16.38 819,000
George Simeon +1
Common Stock
2025-10-09 Buy 63,157 $19.00 1,199,983
George Simeon +1
Common Stock
2025-10-09 Buy 63,158 $19.00 1,200,002
Enright Patrick G
Common Stock
2025-10-09 Buy 11,990 $20.85 249,992
Enright Patrick G
Common Stock
2025-10-09 Buy 105,265 $19.00 2,000,035
Nunn Jason Raleigh
Common Stock
2025-10-09 Buy 63,158 $19.00 1,200,002
Moulder Leon O Jr
Common Stock
2025-10-07 Buy 36,928 $20.85 769,949
Kiselak Tomas +3
Common Stock
2025-10-07 Buy 316,219 $19.00 6,008,161
Lu Hongbo
Common Stock
2025-10-07 Buy 263,160 $19.00 5,000,040
showing 20 of 127 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 140 55,144,296
2025-12-31 126 41,657,114
2025-09-30 81 34,498,174
2025-06-30 74 34,056,527
2025-03-31 68 32,489,883
2024-12-31 66 31,716,256
2024-09-30 45 24,269,336
2020-03-31 2 1,026
2019-12-31 7 49,280
2019-09-30 6 65,388
2019-06-30 6 44,937
2019-03-31 7 86,862
Form 13F Holdings
Firm Period DFND Voting Shares
Y-Intercept Hong Kong Ltd [2026-06-30] SOLE 17,332 17,332
Gamma Investing LLC [2026-06-30] DFND 195 195
Torren Management LLC [2026-06-30] SOLE 0 95
Physician Wealth Advisors Inc [2026-06-30] SOLE 0 67
Fortitude Family Office LLC [2026-06-30] SOLE 29 29
Corecap Advisors LLC [2026-06-30] SOLE 0 12
Hughes Financial Services LLC [2026-06-30] SOLE 1 1
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