Zenas BioPharma, Inc. (ZBIO) Insider Ownership

Historic Ownership Trends

Data spanning the past 90 days through December 12, 2025 reveals that Zenas BioPharma's three principal insider shareholders consist of Director Funds Management Llc Fairmount (2.21Mn shares), TenPercentOwner One Capital Management, Llc Sr (1.92Mn shares), Director Patrick G Enright (1.84Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Sciences Gp, Llc Enavate 3,761,359 18 Sep, 2024
Funds Management Llc Fairmount 2,209,025 09 Oct, 2025
One Capital Management, Llc Sr 1,917,895 14 Oct, 2025
Patrick G Enright 1,844,659 14 Oct, 2025
Jason Raleigh Nunn 1,173,395 14 Oct, 2025
Biomedical Innovation Master Investors (Cayman) I L.P. Wellington 801,624 18 Sep, 2024
Leon O Jr Moulder Chief Executive Officer 303,083 19 Feb, 2025
Hongbo Lu 58,823 17 Sep, 2024
Ting Xiao 47,000 11 Feb, 2025

* 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
09 Oct, 2025 One Capital Management, Llc Sr 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 Jason Raleigh Nunn Common Stock A 63,158 $19.00 1,173,395 I P
09 Oct, 2025 Patrick G Enright Common Stock A 11,990 $20.85 11,990 D P
09 Oct, 2025 One Capital Management, Llc Sr Common Stock A 63,157 $19.00 1,917,895 I P
07 Oct, 2025 Leon O Jr Moulder Common Stock A 36,928 $20.85 36,928 I P
07 Oct, 2025 Funds Management Llc Fairmount Common Stock A 316,219 $19.00 2,209,025 I P
18 Feb, 2025 Leon O Jr Moulder Common Stock A 25,000 $6.67 266,155 D P
07 Feb, 2025 Ting Xiao - - 47,000 D
07 Feb, 2025 Ting Xiao Common Stock A 10,000 $7.76 47,000 D P
03 Dec, 2024 Leon O Jr Moulder Common Stock A 25,000 $10.76 196,155 D P
04 Dec, 2024 Leon O Jr Moulder Common Stock A 45,000 $9.98 241,155 D P
18 Nov, 2024 Leon O Jr Moulder Common Stock A 7,500 $15.00 168,655 D P
19 Nov, 2024 Leon O Jr Moulder Common Stock A 2,500 $14.57 171,155 D P
18 Sep, 2024 Leon O Jr Moulder Common Stock A 10,000 $17.91 1,662,039 I P
18 Sep, 2024 Leon O Jr Moulder - - 1,662,039 I
19 Sep, 2024 Leon O Jr Moulder Common Stock A 5,000 $17.89 1,667,039 I P
19 Sep, 2024 Leon O Jr Moulder - - 1,667,039 I
20 Sep, 2024 Leon O Jr Moulder - - 1,669,406 I
20 Sep, 2024 Leon O Jr Moulder Common Stock A 2,367 $17.88 1,669,406 I P