Zenas BiopharmaZBIO
13F holders, Q1 2026 (March 31)140holders +21
44new positions
28sold out
3famous investors
$19.81avg. 13F price*
At the end of Q1 2026, 140 institutions reported holding Zenas Biopharma Inc. (ZBIO) in their 13F filings, up 21 from Q4 2025. 44 opened new positions and 28 sold out. The largest holders were FMR LLC ($177.6M), SR One Capital Management, LP ($98.5M) and NEA Management Company, LLC ($78.7M). 3 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Zenas Biopharma Inc.
- CUSIP
- 98937L105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 44 | $143.5M |
| Exits | 28 | $109.5M |
All 13F filers, Q4 2025 → Q1 2026: 18,005,322 shares bought and 3,467,641 shares sold, net +14,537,681 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 140 holders
| FMR LLC | 0.01% | Add +17.9% | 9,082,000 | $177.6M |
| SR One Capital Management, LP | 10.76% | No change | 5,037,854 | $98.5M |
| NEA Management Company, LLC | 4.47% | Add +14.2% | 4,023,219 | $78.7M |
| Enavate Sciences Gp, LLC | 21.80% | No change | 3,919,159 | $76.6M |
| Federated Hermes, Inc. | 0.10% | Add +15.2% | 3,127,031 | $61.1M |
| Polar Capital Holdings Plc | 0.22% | Add +141.0% | 2,548,444 | $49.8M |
| Capital International Investors | 0.01% | New | 2,434,000 | $47.6M |
| Royalty Pharma Sub-Manager, LLC | 27.02% | Add +89.1% | 2,388,150 | $46.7M |
| Fairmount Funds Management LLC | 3.33% | Add +6.8% | 2,359,025 | $46.1M |
| BlackRock, Inc. | 0.00% | Add +15.3% | 2,037,548 | $39.8M |
| NVP Associates, LLC | 20.40% | No change | 1,838,482 | $35.9M |
| Alliancebernstein L.P. | 0.01% | Add +4790.0% | 897,321 | $32.6M |
| State Street Corp. | 0.00% | Add +235.6% | 1,470,923 | $28.8M |
| Wellington Management Group LLP | 0.00% | Add +45.7% | 1,246,053 | $24.4M |
| Vanguard Capital Management LLC | 0.00% | — | 1,245,391 | $24.3M |
| Silverarc Capital Management, LLC | 2.62% | New | 1,135,935 | $22.2M |
| EcoR1 Capital, LLC | 0.66% | No change | 789,500 | $15.4M |
| Balyasny Asset Management L.P. | 0.03% | Add +245.4% | 667,070 | $13.0M |
| ArrowMark Colorado Holdings LLC | 0.34% | Reduce -12.3% | 658,909 | $12.9M |
| Geode Capital Management, LLC | 0.00% | Add +11.4% | 655,785 | $12.8M |
| Pivotal bioVenture Partners Investment Advisor LLC | 4.14% | No change | 591,991 | $11.6M |
| Woodline Partners LP | 0.04% | New | 590,525 | $11.5M |
| Great Point Partners LLC | 2.51% | New | 524,066 | $10.2M |
| Rock Springs Capital Management LP | 0.58% | No change | 502,077 | $9.8M |
| Marshall Wace, LLP | 0.01% | Add +6969.4% | 501,928 | $9.8M |
| Millennium Management | 0.01% | Add +869.9% | 476,818 | $9.3M |
| NEXTBio Capital Management LP | 3.87% | Add +32.5% | 426,736 | $8.3M |
| Bank of America Corp. | 0.00% | Add +723.5% | 388,347 | $7.6M |
| Goldman Sachs Group Inc. | 0.00% | Add +191.9% | 381,461 | $7.5M |
| UBS Group AG | 0.00% | Add +428.7% | 367,405 | $7.2M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -3.2% | 357,266 | $7.0M |
| Sio Capital Management, LLC | 0.93% | New | 331,730 | $6.5M |
| Two Sigma Investments, LP | 0.00% | Add +1721.6% | 275,056 | $5.4M |
| Vanguard Portfolio Management LLC | 0.00% | — | 251,410 | $4.9M |
| Jennison Associates LLC | 0.00% | New | 250,000 | $4.9M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +5.3% | 224,402 | $4.4M |
| Jefferies Financial Group Inc. | 0.05% | New | 219,947 | $4.3M |
| iA Global Asset Management Inc. | 0.06% | New | 215,830 | $4.2M |
| Sphera Funds Management LTD. | 0.72% | New | 214,334 | $4.2M |
| Vestal Point Capital, LP | 0.11% | New | 200,000 | $3.9M |
| Northern Trust Corp. | 0.00% | Add +25.3% | 194,640 | $3.8M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 179,388 | $3.5M |
| SEB Asset Management AB | 0.01% | — | 163,860 | $3.2M |
| Monashee Investment Management LLC | 1.89% | New | 150,000 | $2.9M |
| Maven Securities LTD | 0.17% | New | 150,000 | $2.9M |
| Walleye Capital LLC | 0.02% | New | 125,232 | $2.4M |
| Invesco Ltd. | 0.00% | Reduce -39.6% | 113,479 | $2.2M |
| Atom Investors LP | 0.15% | New | 107,016 | $2.1M |
| Seven Grand Managers, LLC | 0.13% | New | 100,000 | $2.0M |
| Morgan Stanley | 0.00% | Reduce -27.2% | 93,396 | $1.8M |
| Susquehanna International Group, LLP | 0.00% | Add +521.5% | 85,005 | $1.7M |
| Exome Asset Management LLC | 0.93% | New | 80,730 | $1.6M |
| Voloridge Investment Management, LLC | 0.01% | Reduce -41.9% | 77,493 | $1.5M |
| Birchview Capital, LP | 0.78% | New | 70,000 | $1.4M |
| Nuveen, LLC | 0.00% | Add +33.3% | 67,770 | $1.3M |
| Citadel Advisors | 0.00% | Add +173.4% | 66,870 | $1.3M |
| Bank of New York Mellon Corp | 0.00% | Add +17.5% | 60,864 | $1.2M |
| Jump Financial, LLC | 0.02% | New | 60,001 | $1.2M |
| AQR Capital Management | 0.00% | Reduce -34.8% | 50,971 | $996K |
| Rafferty Asset Management, LLC | 0.00% | New | 48,169 | $942K |
| Alps Advisors Inc. | 0.00% | Reduce -0.9% | 43,694 | $854K |
| Squarepoint Ops LLC | 0.00% | Add +175.9% | 42,874 | $838K |
| DAFNA Capital Management LLC | 0.19% | New | 42,500 | $831K |
| Burkehill Global Management, LP | 0.04% | New | 40,000 | $782K |
| J. Goldman & Co LP | 0.03% | New | 36,797 | $719K |
| Swiss National Bank | 0.00% | No change | 31,600 | $618K |
| Schroder Investment Management Group | 0.00% | Reduce -33.5% | 33,697 | $614K |
| Voleon Capital Management LP | 0.01% | Add +190.7% | 29,612 | $579K |
| Barclays PLC | 0.00% | Reduce -13.9% | 29,610 | $579K |
| Jacobs Levy Equity Management, Inc. | 0.00% | New | 27,532 | $538K |
| Rhumbline Advisers | 0.00% | Add +22.2% | 26,813 | $524K |
| HRT Financial LP | 0.00% | New | 25,749 | $503K |
| JPMorgan Chase & Co. | 0.00% | Add +15.6% | 25,109 | $458K |
| Profund Advisors LLC | 0.02% | New | 21,416 | $419K |
| Quantinno Capital Management LP | 0.00% | New | 21,126 | $413K |
| Vanguard Global Advisers, LLC | 0.00% | — | 20,840 | $407K |
| State of Wisconsin Investment Board | 0.00% | Add +103.6% | 20,814 | $407K |
| XTX Topco Ltd | 0.01% | Add +58.5% | 19,311 | $378K |
| Deutsche Bank AG | 0.00% | Add +50.7% | 19,266 | $377K |
| Aquatic Capital Management LLC | 0.01% | New | 18,640 | $364K |
| Allstate Corp. | 0.00% | New | 18,223 | $356K |
| Schonfeld Strategic Advisors LLC | 0.00% | Add +93.3% | 17,638 | $345K |
| Corient Private Wealth LP | 0.00% | New | 16,845 | $329K |
| Prelude Capital Management, LLC | 0.03% | New | 16,645 | $325K |
| California State Teachers Retirement System | 0.00% | Add +0.8% | 15,819 | $309K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +84.8% | 15,523 | $303K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +63.9% | 14,386 | $277K |
| China Universal Asset Management Co., Ltd. | 0.02% | Add +1.6% | 13,526 | $264K |
| Scientech Research LLC | 0.21% | New | 12,952 | $253K |
| MetLife Investment Management, LLC | 0.00% | Add +27.8% | 12,909 | $252K |
| Creative Planning | 0.00% | Add +3.1% | 12,658 | $247K |
| Fox Run Management, L.L.C. | 0.04% | New | 13,331 | $243K |
| Sei Investments Co. | 0.00% | New | 12,386 | $242K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 10,642 | $208K |
| Legal & General Group Plc | 0.00% | Reduce -19.9% | 10,432 | $204K |
| BNP Paribas Financial Markets | 0.00% | Add +40.1% | 9,999 | $195K |
| Citigroup Inc. | 0.00% | Add +320.6% | 9,888 | $193K |
| Wells Fargo & Company | 0.00% | Reduce -58.0% | 8,885 | $174K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +810.1% | 7,235 | $141K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | New | 6,777 | $132K |
"% of holder's portfolio" is ZBIO's weight in each manager's 13F, not the share of Zenas Biopharma Inc. the manager owns.