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.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| FMR LLC | 9.5M | 15.5% |
| SR One Capital Management, LP | 5.0M | 8.2% |
| NEA Management Company, LLC | 4.0M | 6.6% |
| ENAVATE SCIENCES GP, LLC | 3.9M | 6.4% |
| FEDERATED HERMES, INC. | 3.1M | 5.1% |
| BlackRock, Inc. | 2.7M | 4.4% |
| Capital International Investors | 2.5M | 4.1% |
| Polar Capital Holdings Plc | 2.4M | 3.9% |
| Royalty Pharma Sub-Manager, LLC | 2.4M | 3.9% |
| Fairmount Funds Management LLC | 2.4M | 3.9% |
| STATE STREET CORP | 2.1M | 3.4% |
| NVP ASSOCIATES, LLC | 1.8M | 3.0% |
| WELLINGTON MANAGEMENT GROUP LLP | 1.6M | 2.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.4M | 2.2% |
| BANK OF AMERICA CORP /DE/ | 1.2M | 2.0% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.2M | 2.0% |
| ALLIANCEBERNSTEIN L.P. | 1.1M | 1.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 882.7K | 1.4% |
| TWO SIGMA INVESTMENTS, LP | 815.2K | 1.3% |
| 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 | 0.9% |
| ArrowMark Colorado Holdings LLC | 573.3K | 0.9% |
| SILVERARC CAPITAL MANAGEMENT, LLC | 509.8K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| 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 |
| GOLDMAN SACHS GROUP INC | Reduced | 381.5K | 271.2K | -110.3K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 1.2M | 1.4M | +109.5K |
| Pivotal bioVenture Partners Investment Advisor LLC | Reduced | 592.0K | 490.8K | -101.2K |
| Invesco Ltd. | Reduced | 113.5K | 19.0K | -94.5K |
| Balyasny Asset Management L.P. | Reduced | 667.1K | 576.7K | -90.4K |
| NORTHERN TRUST CORP | Increased | 194.6K | 281.1K | +86.5K |
| BARCLAYS PLC | Increased | 29.6K | 116.0K | +86.4K |
| ArrowMark Colorado Holdings LLC | Reduced | 658.9K | 573.3K | -85.6K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Sold Out | 85.0K | 0 | -85.0K |
| Walleye Capital LLC | Increased | 125.2K | 209.1K | +83.8K |
| Squarepoint Ops LLC | Increased | 42.9K | 125.2K | +82.3K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 224.4K | 302.1K | +77.7K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Sold Out | 77.5K | 0 | -77.5K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 179.4K | 254.6K | +75.2K |
| Verition Fund Management LLC | New | 0 | 73.0K | +73.0K |
| Atom Investors LP | Reduced | 107.0K | 37.1K | -69.9K |
| Capital International Investors | Increased | 2.4M | 2.5M | +68.9K |
| CSM Advisors, LLC | New | 0 | 67.6K | +67.6K |
| JENNISON ASSOCIATES LLC | Increased | 250.0K | 314.0K | +64.0K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 251.4K | 304.9K | +53.5K |
| LOS ANGELES CAPITAL MANAGEMENT LLC | New | 0 | 48.5K | +48.5K |
| DAFNA Capital Management LLC | Sold Out | 42.5K | 0 | -42.5K |
| MORGAN STANLEY | Increased | 93.4K | 135.0K | +41.6K |
| CITIGROUP INC | Increased | 9.9K | 49.5K | +39.6K |
| SCHRODER INVESTMENT MANAGEMENT GROUP | Sold Out | 33.7K | 0 | -33.7K |
| BOOTHBAY FUND MANAGEMENT, LLC | New | 0 | 33.3K | +33.3K |
| J. Goldman & Co LP | Increased | 36.8K | 68.2K | +31.4K |
| Exome Asset Management LLC | Reduced | 80.7K | 52.4K | -28.3K |
| DCF Advisers, LLC | New | 0 | 28.2K | +28.2K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Sold Out | 27.5K | 0 | -27.5K |
| Birchview Capital, LP | Increased | 70.0K | 93.6K | +23.6K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 15.5K | 37.8K | +22.3K |
| Swiss National Bank | Increased | 31.6K | 53.2K | +21.6K |
| XTX Topco Ltd | Increased | 19.3K | 40.0K | +20.7K |
| ALPS ADVISORS INC | Increased | 43.7K | 63.7K | +20.0K |
| AQR CAPITAL MANAGEMENT LLC | Reduced | 51.0K | 31.1K | -19.9K |
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.