Zenas BioPharma, Inc. (ZBIO) Insider Ownership

Historic Insider Ownership Trends

ZBIO's three largest insider shareholders as of April 17, 2026 are Sciences Gp, Llc Enavate (TenPercentOwner, 3.76Mn shares), One Capital Management, Llc Sr (TenPercentOwner, 3.09Mn shares), Funds Management Llc Fairmount (Director, 2.36Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Sciences Gp, Llc Enavate - 0 3,761,359 18 Sep, 2024
One Capital Management, Llc Sr - 0 3,091,290 14 Oct, 2025
Funds Management Llc Fairmount - 0 2,359,025 01 Apr, 2026
Funds Management Llc Fairmount - 0 1,892,806 17 Sep, 2024
Patrick G Enright - 11,990 1,832,669 14 Oct, 2025
Leon O Jr Moulder Chief Executive Officer 0 1,726,039 31 Mar, 2026
Jason Raleigh Nunn - 0 1,173,395 14 Oct, 2025
One Capital Management, Llc Sr - 0 1,110,237 16 Sep, 2024
Jason Raleigh Nunn - 0 1,110,237 16 Sep, 2024
Biomedical Innovation Master Investors (Cayman) I L.P. Wellington - 801,624 0 18 Sep, 2024
Hongbo Lu - 0 426,736 02 Apr, 2026
Leon O Jr Moulder Chief Executive Officer 423,155 0 03 Feb, 2026
Ting Xiao - 47,000 0 11 Feb, 2025
Patricia L Allen - 19,860 0 13 Feb, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
31 Mar, 2026 Hongbo Lu Common Stock A 3,768 $18.63 426,736 I P
31 Mar, 2026 Funds Management Llc Fairmount Common Stock A 150,000 $20.00 2,359,025 I P
31 Mar, 2026 Hongbo Lu Common Stock A 75,000 $20.00 422,968 I P
30 Mar, 2026 Leon O Jr Moulder Common Stock A 20,000 $18.23 1,692,039 I P
31 Mar, 2026 Leon O Jr Moulder Common Stock A 34,000 $19.31 1,726,039 I P
12 Feb, 2026 Patricia L Allen Common Stock A 5,000 $23.77 5,000 D P
11 Feb, 2026 Hongbo Lu Common Stock A 25,985 $22.50 347,968 I P
12 Feb, 2026 Patricia L Allen Common Stock A 5,700 $24.34 10,700 D P
12 Feb, 2026 Patricia L Allen Common Stock A 5,000 $26.50 15,700 D P
13 Feb, 2026 Patricia L Allen Common Stock A 4,160 $26.36 19,860 D P
02 Feb, 2026 Leon O Jr Moulder Common Stock A 57,000 $17.96 423,155 D P
07 Jan, 2026 Leon O Jr Moulder Common Stock A 50,000 $16.38 316,155 D P
08 Jan, 2026 Leon O Jr Moulder Common Stock A 30,000 $16.30 346,155 D P
09 Jan, 2026 Leon O Jr Moulder Common Stock A 20,000 $16.55 366,155 D P
09 Oct, 2025 One Capital Management, Llc Sr Common Stock A 63,158 $19.00 1,173,395 I P
09 Oct, 2025 Jason Raleigh Nunn Common Stock A 63,158 $19.00 1,173,395 I P
09 Oct, 2025 Patrick G Enright Common Stock A 105,265 $19.00 1,832,669 I P
09 Oct, 2025 One Capital Management, Llc Sr Common Stock A 63,157 $19.00 1,917,895 I P
09 Oct, 2025 Patrick G Enright Common Stock A 11,990 $20.85 11,990 D P
07 Oct, 2025 Leon O Jr Moulder Common Stock A 36,928 $20.85 36,928 I P