ZBIO
Zenas BioPharma, Inc.
NASDAQ · Healthcare · Biotechnology · US
$32.88
−0.12%0
Insider buys (3m)
0
Insider sells (3m)
$0.00
Net value (3m)
+88.2%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Sep 2, 2026 | Oliger Christy J. · director | A-Award | 37,000 | $32 |
| Jun 17, 2026 | Allen Patricia L · director | A-Award | 18,500 | $19 |
| Jun 17, 2026 | ENRIGHT PATRICK G · director | A-Award | 18,500 | $19 |
| Jun 17, 2026 | Boylan James P · director | A-Award | 18,500 | $19 |
| Jun 17, 2026 | von Moltke Lisa · officer: See Remarks | A-Award | 150,000 | $19 |
| Jun 17, 2026 | Nunn Jason Raleigh · director | A-Award | 18,500 | $19 |
| Jun 17, 2026 | Lu Hongbo · director | A-Award | 18,500 | $19 |
| Jun 17, 2026 | MOULDER LEON O JR · director, officer: See Remarks | A-Award | 500,000 | $19 |
| Jun 17, 2026 | ORLOFF JOHN J · director | A-Award | 18,500 | $19 |
| Jun 17, 2026 | Fox Jennifer A. · officer: See Remarks | A-Award | 125,000 | $19 |
| Jun 17, 2026 | Fox Jennifer A. · officer: See Remarks | A-Award | 1,592 | $13 |
| Jun 17, 2026 | Farmer Joseph L · officer: See Remarks | A-Award | 175,000 | $19 |
| Jun 17, 2026 | Farmer Joseph L · officer: See Remarks | A-Award | 974 | $13 |
| May 18, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 60,000 | $17 |
| Apr 29, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 35,000 | $18 |
| Apr 29, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 25,000 | $18 |
| Apr 2, 2026 | Lu Hongbo · director | Purchase | 3,768 | $19 |
| Apr 1, 2026 | Fairmount Funds Management LLC · director | Purchase | 150,000 | $20 |
| Mar 31, 2026 | Lu Hongbo · director | Purchase | 75,000 | $20 |
| Mar 31, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 20,000 | $18 |
| Mar 31, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 34,000 | $19 |
| Feb 13, 2026 | Allen Patricia L · director | Purchase | 5,700 | $24 |
| Feb 13, 2026 | Allen Patricia L · director | Purchase | 5,000 | $27 |
| Feb 13, 2026 | Allen Patricia L · director | Purchase | 4,160 | $26 |
| Feb 13, 2026 | Lu Hongbo · director | Purchase | 25,985 | $23 |
| Feb 3, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 57,000 | $18 |
| Jan 9, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 50,000 | $16 |
| Jan 9, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 20,000 | $17 |
| Jan 9, 2026 | MOULDER LEON O JR · director, officer: Chief Executive Officer | Purchase | 30,000 | $16 |
| Oct 14, 2025 | ENRIGHT PATRICK G · director | Purchase | 11,990 | $21 |
Institutional positioning
13F filings over the trailing two quarters
New 82Increased 120Reduced 58Sold out 21
| Filer | Action | Shares | Filed |
|---|---|---|---|
| FMR LLC | Increased | 9,506,701 | Aug 13, 2026 |
| FMR LLC | Increased | 9,082,000 | May 15, 2026 |
| SR ONE CAPITAL MANAGEMENT, LP | Unchanged | 5,037,854 | Aug 12, 2026 |
| SR ONE CAPITAL MANAGEMENT, LP | Unchanged | 5,037,854 | May 14, 2026 |
| NEA Management Company, LLC | Unchanged | 4,023,219 | Aug 14, 2026 |
| NEA MANAGEMENT COMPANY, LLC | Increased | 4,023,219 | May 15, 2026 |
| ENAVATE SCIENCES GP, LLC | Unchanged | 3,919,159 | May 15, 2026 |
| Enavate Sciences GP, LLC | Unchanged | 3,919,159 | Aug 14, 2026 |
| FEDERATED HERMES, INC. | Increased | 3,127,031 | May 11, 2026 |
| FEDERATED HERMES, INC. | Reduced | 3,116,805 | Aug 12, 2026 |
| BlackRock, Inc. | Increased | 2,686,225 | Aug 7, 2026 |
| POLAR CAPITAL HOLDINGS PLC | Increased | 2,548,444 | May 15, 2026 |
| Capital International Investors | Increased | 2,502,912 | Aug 12, 2026 |
| CAPITAL INTERNATIONAL INVESTORS | New Position | 2,434,000 | May 13, 2026 |
| Polar Capital Holdings Plc | Reduced | 2,412,772 | Aug 14, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Sep 2, 2026