ZBIO Zenas BioPharma, Inc.
Zenas BioPharma, Inc. (ZBIO) Institutional Ownership
What the institutions did with ZBIO last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| FMR LLC | 9.5M | 16.2% |
| SR One Capital Management, LP | 5.0M | 8.6% |
| NEA Management Company, LLC | 4.0M | 6.8% |
| ENAVATE SCIENCES GP, LLC | 3.9M | 6.7% |
| FEDERATED HERMES, INC. | 3.1M | 5.3% |
| BlackRock, Inc. | 2.7M | 4.6% |
| Capital International Investors | 2.5M | 4.3% |
| Polar Capital Holdings Plc | 2.4M | 4.1% |
| Fairmount Funds Management LLC | 2.4M | 4.0% |
| STATE STREET CORP | 2.1M | 3.5% |
| NVP ASSOCIATES, LLC | 1.8M | 3.1% |
| WELLINGTON MANAGEMENT GROUP LLP | 1.6M | 2.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.4M | 2.3% |
| BANK OF AMERICA CORP /DE/ | 1.2M | 2.1% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.2M | 2.1% |
| ALLIANCEBERNSTEIN L.P. | 1.1M | 1.9% |
| GEODE CAPITAL MANAGEMENT, LLC | 882.7K | 1.5% |
| TWO SIGMA INVESTMENTS, LP | 815.2K | 1.4% |
| EcoR1 Capital, LLC | 789.5K | 1.3% |
| MILLENNIUM MANAGEMENT LLC | 660.5K | 1.1% |
| Woodline Partners LP | 590.5K | 1.0% |
| Balyasny Asset Management L.P. | 576.7K | 1.0% |
| ArrowMark Colorado Holdings LLC | 573.3K | 1.0% |
| SILVERARC CAPITAL MANAGEMENT, LLC | 509.8K | 0.9% |
| Rock Springs Capital Management LP | 502.1K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Royalty Pharma Sub-Manager, LLC | Sold Out | 2.4M | 0 | -2.4M |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 357.3K | 1.2M | +869.7K |
| BANK OF AMERICA CORP /DE/ | Increased | 388.3K | 1.2M | +842.8K |
| BlackRock, Inc. | Increased | 2.0M | 2.7M | +648.7K |
| SILVERARC CAPITAL MANAGEMENT, LLC | Reduced | 1.1M | 509.8K | -626.1K |
| STATE STREET CORP | Increased | 1.5M | 2.1M | +584.2K |
| TWO SIGMA INVESTMENTS, LP | Increased | 275.1K | 815.2K | +540.1K |
| GREAT POINT PARTNERS LLC | Sold Out | 524.1K | 0 | -524.1K |
| FMR LLC | Increased | 9.1M | 9.5M | +424.7K |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 1.2M | 1.6M | +347.8K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 655.8K | 882.7K | +226.9K |
| Jefferies Financial Group Inc. | Sold Out | 219.9K | 0 | -219.9K |
| ALLIANCEBERNSTEIN L.P. | Increased | 897.3K | 1.1M | +206.1K |
| UBS Group AG | Reduced | 367.4K | 178.1K | -189.3K |
| MILLENNIUM MANAGEMENT LLC | Increased | 476.8K | 660.5K | +183.7K |
| MARSHALL WACE, LLP | Reduced | 501.9K | 323.4K | -178.5K |
| Vestal Point Capital, LP | Increased | 200.0K | 365.0K | +165.0K |
| SEB Asset Management AB | Sold Out | 163.9K | 0 | -163.9K |
| Monashee Investment Management LLC | Sold Out | 150.0K | 0 | -150.0K |
| Maven Securities LTD | Sold Out | 150.0K | 0 | -150.0K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 10.0K | 151.1K | +141.1K |
| Voleon Capital Management LP | Increased | 29.6K | 167.1K | +137.5K |
| Polar Capital Holdings Plc | Reduced | 2.5M | 2.4M | -135.7K |
| CITADEL ADVISORS LLC | Increased | 66.9K | 195.8K | +128.9K |
| Sio Capital Management, LLC | Reduced | 331.7K | 208.6K | -123.2K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.