Zenas BioPharma, Inc.
ZBIO- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001953926
No open-market purchases or sales by Zenas BioPharma, Inc. insiders were filed in the last 90 days; 144 institutions reported holding it in 13F filings for Q2 2026, worth $1.55B in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Zenas BioPharma, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 80
- +7 vs. Q2 2025
- Shares held
- 34.8M
- +770.5K (+2.3%) vs. Q2 2025
- Total value
- $774.5M
- +$444.5M (+134.7%) vs. Q2 2025
- New holders
- 14
- 23 more added
- Sold out
- 7
- 21 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ZBIO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 144 | $1.55B |
| Q1 2026 | 140 | $1.14B |
| Q4 2025 | 119 | $1.55B |
| Q3 2025 | 80 | $774.5M |
| Q2 2025 | 73 | $330.0M |
| Q1 2025 | 67 | $256.7M |
| Q4 2024 | 65 | $259.6M |
| Q3 2024 | 44 | $418.5M |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Zenas BioPharma, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Sr One Capital Management, LP | 4,911,539 | $109.0M | 15.77% | 00.0% | Unchanged |
| FMR LLC | 4,820,370 | $107.0M | 0.01% | +1,496,836+45.0% | Added |
| Enavate Sciences GP, LLC | 3,761,359 | $83.5M | 25.49% | 00.0% | Unchanged |
| NEA Management Company, LLC | 2,733,719 | $60.7M | 3.33% | 00.0% | Unchanged |
| Novo Holdings A/S | 2,000,000 | $44.4M | 2.86% | −250,000−11.1% | Reduced |
| Fairmount Funds Management LLC | 1,892,806 | $42.0M | 3.78% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 1,861,838 | $41.3M | 0.07% | 00.0% | Unchanged |
| NVP Associates, LLC | 1,838,482 | $40.8M | 24.58% | 00.0% | Unchanged |
| Deerfield Management Company, L.P. (Series C) | 1,562,942 | $34.7M | 0.53% | 00.0% | Unchanged |
| BlackRock, Inc. | 1,228,641 | $27.3M | 0.00% | +133,032+12.1% | Added |
| Vivo Capital, LLC | 1,183,260 | $26.3M | 2.11% | 00.0% | Unchanged |
| Vanguard Group Inc | 1,162,758 | $25.8M | 0.00% | +170,546+17.2% | Added |
| Wellington Management Group LLP | 857,524 | $19.0M | 0.00% | −21,394−2.4% | Reduced |
| ArrowMark Colorado Holdings LLC | 824,668 | $18.3M | 0.34% | −269,670−24.6% | Reduced |
| Pivotal bioVenture Partners Investment Advisor LLC | 779,045 | $17.3M | 10.00% | 00.0% | Unchanged |
| Rock Springs Capital Management LP | 580,677 | $12.9M | 0.75% | −59,790−9.3% | Reduced |
| Geode Capital Management, LLC | 470,035 | $10.4M | 0.00% | +96,418+25.8% | Added |
| State Street Corp | 377,485 | $8.38M | 0.00% | +67,249+21.7% | Added |
| Price T Rowe Associates Inc | 374,298 | $8.31M | 0.00% | −110,904−22.9% | Reduced |
| Charles Schwab Investment Management Inc | 178,396 | $3.96M | 0.00% | +56,186+46.0% | Added |
| Eversept Partners, LP | 158,742 | $3.52M | 0.27% | −166,737−51.2% | Reduced |
| Sectoral Asset Management Inc | 152,025 | $3.37M | 2.08% | −58,600−27.8% | Reduced |
| Invesco Ltd. | 145,796 | $3.24M | 0.00% | +145,796 | New |
| Northern Trust Corp | 133,278 | $2.96M | 0.00% | +13,763+11.5% | Added |
| Summit Wealth Group LLC | 51,356 | $2.69M | 0.37% | +51,356 | New |
| Schroder Investment Management Group | 112,612 | $2.32M | 0.00% | −42,304−27.3% | Reduced |
| Superstring Capital Management LP | 96,665 | $2.15M | 2.11% | −14,940−13.4% | Reduced |
| Morgan Stanley | 88,733 | $1.97M | 0.00% | −35,568−28.6% | Reduced |
| Millennium Management LLC | 71,850 | $1.60M | 0.00% | +71,850 | New |
| Bank of New York Mellon Corp | 41,688 | $925.5K | 0.00% | +3,255+8.5% | Added |
| StemPoint Capital LP | 38,742 | $860.1K | 0.17% | +38,742 | New |
| UBS Group AG | 35,492 | $787.9K | 0.00% | +11,229+46.3% | Added |
| AQR Capital Management LLC | 24,584 | $545.8K | 0.00% | −84−0.3% | Reduced |
| Barclays PLC | 22,876 | $507.8K | 0.00% | −4,937−17.8% | Reduced |
| Rhumbline Advisers | 21,214 | $470.9K | 0.00% | +1,493+7.6% | Added |
| Nuveen, LLC | 20,519 | $455.5K | 0.00% | −11,107−35.1% | Reduced |
| Two Sigma Investments, LP | 20,382 | $452.5K | 0.00% | +765+3.9% | Added |
| Alps Advisors Inc | 20,042 | $444.9K | 0.00% | −2,511−11.1% | Reduced |
| Alliancebernstein L.P. | 18,350 | $407.4K | 0.00% | +1,990+12.2% | Added |
| Birchview Capital, LP | 16,500 | $366.3K | 0.28% | 00.0% | Unchanged |
| Bank of America Corp | 14,809 | $328.8K | 0.00% | +818+5.8% | Added |
| Wells Fargo & Company | 12,455 | $276.5K | 0.00% | +2,031+19.5% | Added |
| Deutsche Bank AG | 12,227 | $271.4K | 0.00% | +11,947+4,266.8% | Added |
| Royal Bank of Canada | 11,881 | $265.0K | 0.00% | +10,547+790.6% | Added |
| Creative Planning | 11,882 | $263.8K | 0.00% | +11,882 | New |
| American Century Companies Inc | 10,981 | $243.8K | 0.00% | +10,981 | New |
| MetLife Investment Management | 10,100 | $224.2K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 7,461 | $165.6K | 0.00% | −1,425−16.0% | Reduced |
| JPMorgan Chase & Co | 6,548 | $145.4K | 0.00% | −1,128−14.7% | Reduced |
| New York State Common Retirement Fund | 6,200 | $137.6K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 5,843 | $129.7K | 0.00% | −3,336−36.3% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 4,499 | $99.9K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 3,146 | $69.8K | 0.00% | +1,716+120.0% | Added |
| STRS Ohio | 2,800 | $62.2K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 1,608 | $35.7K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 1,469 | $33.0K | 0.00% | +4+0.3% | Added |
| Tower Research Capital LLC (TRC) | 1,388 | $30.8K | 0.00% | −1,158−45.5% | Reduced |
| Legal & General Group Plc | 1,354 | $30.0K | 0.00% | −194−12.5% | Reduced |
| Russell Investments Group, Ltd. | 1,345 | $29.9K | 0.00% | +1,345 | New |
| California State Teachers Retirement System | 1,145 | $25.4K | 0.00% | +1+0.1% | Added |
| Quarry LP | 1,134 | $25.2K | 0.01% | +291+34.5% | Added |
| Sterling Capital Management LLC | 1,121 | $24.9K | 0.00% | +682+155.4% | Added |
| US Bancorp | 953 | $21.2K | 0.00% | −108−10.2% | Reduced |
| Amalgamated Bank | 524 | $12.0K | 0.00% | 00.0% | Unchanged |
| Aster Capital Management (DIFC) Ltd | 339 | $7.53K | 0.00% | +339 | New |
| Signaturefd, LLC | 332 | $7.37K | 0.00% | +37+12.5% | Added |
| Citigroup Inc | 188 | $4.17K | 0.00% | −5,263−96.6% | Reduced |
| GAMMA Investing LLC | 183 | $4.06K | 0.00% | +104+131.6% | Added |
| Nisa Investment Advisors, LLC | 115 | $2.55K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 115 | $2.55K | 0.00% | +115 | New |
| Advisor Group Holdings, Inc. | 104 | $2.31K | 0.00% | +104 | New |
| UMA Financial Services, Inc. | 67 | $1.49K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 58 | $1.29K | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 24 | $533 | 0.00% | +24 | New |
| Clearstead Advisors, LLC | 23 | $511 | 0.00% | 00.0% | Unchanged |
| Global Retirement Partners, LLC | 15 | $333 | 0.00% | +15 | New |
| Sunbelt Securities, Inc. | 11 | $244 | 0.00% | +11 | New |
| True Wealth Design, LLC | 3 | $67 | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 2 | $44 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 1 | $22 | 0.00% | +1 | New |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −293,785−100.0% | Sold out |
| Catalio Capital Management, LP | 0 | $0 | 0.00% | −215,314−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −19,541−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −14,900−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −13,206−100.0% | Sold out |
| Alpine Global Management, LLC | 0 | $0 | 0.00% | −12,907−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −12,142−100.0% | Sold out |