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 |
|---|---|---|---|---|---|
| SBI Securities Co., Ltd. | 1 | $22 | 0.00% | +1 | New |
| Essential Partners LLC | 2 | $44 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 3 | $67 | 0.00% | 00.0% | Unchanged |
| Sunbelt Securities, Inc. | 11 | $244 | 0.00% | +11 | New |
| Global Retirement Partners, LLC | 15 | $333 | 0.00% | +15 | New |
| Clearstead Advisors, LLC | 23 | $511 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 24 | $533 | 0.00% | +24 | New |
| EverSource Wealth Advisors, LLC | 58 | $1.29K | 0.00% | 00.0% | Unchanged |
| UMA Financial Services, Inc. | 67 | $1.49K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 104 | $2.31K | 0.00% | +104 | New |
| Nisa Investment Advisors, LLC | 115 | $2.55K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 115 | $2.55K | 0.00% | +115 | New |
| GAMMA Investing LLC | 183 | $4.06K | 0.00% | +104+131.6% | Added |
| Citigroup Inc | 188 | $4.17K | 0.00% | −5,263−96.6% | Reduced |
| Signaturefd, LLC | 332 | $7.37K | 0.00% | +37+12.5% | Added |
| Aster Capital Management (DIFC) Ltd | 339 | $7.53K | 0.00% | +339 | New |
| Amalgamated Bank | 524 | $12.0K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 953 | $21.2K | 0.00% | −108−10.2% | Reduced |
| Sterling Capital Management LLC | 1,121 | $24.9K | 0.00% | +682+155.4% | Added |
| Quarry LP | 1,134 | $25.2K | 0.01% | +291+34.5% | Added |
| California State Teachers Retirement System | 1,145 | $25.4K | 0.00% | +1+0.1% | Added |
| Russell Investments Group, Ltd. | 1,345 | $29.9K | 0.00% | +1,345 | New |
| Legal & General Group Plc | 1,354 | $30.0K | 0.00% | −194−12.5% | Reduced |
| Tower Research Capital LLC (TRC) | 1,388 | $30.8K | 0.00% | −1,158−45.5% | Reduced |
| CWM, LLC | 1,469 | $33.0K | 0.00% | +4+0.3% | Added |
| Ameritas Investment Partners, Inc. | 1,608 | $35.7K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 2,800 | $62.2K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 3,146 | $69.8K | 0.00% | +1,716+120.0% | Added |
| Police & Firemen's Retirement System of New Jersey | 4,499 | $99.9K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 5,843 | $129.7K | 0.00% | −3,336−36.3% | Reduced |
| New York State Common Retirement Fund | 6,200 | $137.6K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 6,548 | $145.4K | 0.00% | −1,128−14.7% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 7,461 | $165.6K | 0.00% | −1,425−16.0% | Reduced |
| MetLife Investment Management | 10,100 | $224.2K | 0.00% | 00.0% | Unchanged |
| American Century Companies Inc | 10,981 | $243.8K | 0.00% | +10,981 | New |
| Creative Planning | 11,882 | $263.8K | 0.00% | +11,882 | New |
| Royal Bank of Canada | 11,881 | $265.0K | 0.00% | +10,547+790.6% | Added |
| Deutsche Bank AG | 12,227 | $271.4K | 0.00% | +11,947+4,266.8% | Added |
| Wells Fargo & Company | 12,455 | $276.5K | 0.00% | +2,031+19.5% | Added |
| Bank of America Corp | 14,809 | $328.8K | 0.00% | +818+5.8% | Added |
| Birchview Capital, LP | 16,500 | $366.3K | 0.28% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 18,350 | $407.4K | 0.00% | +1,990+12.2% | Added |
| Alps Advisors Inc | 20,042 | $444.9K | 0.00% | −2,511−11.1% | Reduced |
| Two Sigma Investments, LP | 20,382 | $452.5K | 0.00% | +765+3.9% | Added |
| Nuveen, LLC | 20,519 | $455.5K | 0.00% | −11,107−35.1% | Reduced |
| Rhumbline Advisers | 21,214 | $470.9K | 0.00% | +1,493+7.6% | Added |
| Barclays PLC | 22,876 | $507.8K | 0.00% | −4,937−17.8% | Reduced |
| AQR Capital Management LLC | 24,584 | $545.8K | 0.00% | −84−0.3% | Reduced |
| UBS Group AG | 35,492 | $787.9K | 0.00% | +11,229+46.3% | Added |
| StemPoint Capital LP | 38,742 | $860.1K | 0.17% | +38,742 | New |
| Bank of New York Mellon Corp | 41,688 | $925.5K | 0.00% | +3,255+8.5% | Added |
| Millennium Management LLC | 71,850 | $1.60M | 0.00% | +71,850 | New |
| Morgan Stanley | 88,733 | $1.97M | 0.00% | −35,568−28.6% | Reduced |
| Superstring Capital Management LP | 96,665 | $2.15M | 2.11% | −14,940−13.4% | Reduced |
| Schroder Investment Management Group | 112,612 | $2.32M | 0.00% | −42,304−27.3% | Reduced |
| Summit Wealth Group LLC | 51,356 | $2.69M | 0.37% | +51,356 | New |
| Northern Trust Corp | 133,278 | $2.96M | 0.00% | +13,763+11.5% | Added |
| Invesco Ltd. | 145,796 | $3.24M | 0.00% | +145,796 | New |
| Sectoral Asset Management Inc | 152,025 | $3.37M | 2.08% | −58,600−27.8% | Reduced |
| Eversept Partners, LP | 158,742 | $3.52M | 0.27% | −166,737−51.2% | Reduced |
| Charles Schwab Investment Management Inc | 178,396 | $3.96M | 0.00% | +56,186+46.0% | Added |
| Price T Rowe Associates Inc | 374,298 | $8.31M | 0.00% | −110,904−22.9% | Reduced |
| State Street Corp | 377,485 | $8.38M | 0.00% | +67,249+21.7% | Added |
| Geode Capital Management, LLC | 470,035 | $10.4M | 0.00% | +96,418+25.8% | Added |
| Rock Springs Capital Management LP | 580,677 | $12.9M | 0.75% | −59,790−9.3% | Reduced |
| Pivotal bioVenture Partners Investment Advisor LLC | 779,045 | $17.3M | 10.00% | 00.0% | Unchanged |
| ArrowMark Colorado Holdings LLC | 824,668 | $18.3M | 0.34% | −269,670−24.6% | Reduced |
| Wellington Management Group LLP | 857,524 | $19.0M | 0.00% | −21,394−2.4% | Reduced |
| Vanguard Group Inc | 1,162,758 | $25.8M | 0.00% | +170,546+17.2% | Added |
| Vivo Capital, LLC | 1,183,260 | $26.3M | 2.11% | 00.0% | Unchanged |
| BlackRock, Inc. | 1,228,641 | $27.3M | 0.00% | +133,032+12.1% | Added |
| Deerfield Management Company, L.P. (Series C) | 1,562,942 | $34.7M | 0.53% | 00.0% | Unchanged |
| NVP Associates, LLC | 1,838,482 | $40.8M | 24.58% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 1,861,838 | $41.3M | 0.07% | 00.0% | Unchanged |
| Fairmount Funds Management LLC | 1,892,806 | $42.0M | 3.78% | 00.0% | Unchanged |
| Novo Holdings A/S | 2,000,000 | $44.4M | 2.86% | −250,000−11.1% | Reduced |
| NEA Management Company, LLC | 2,733,719 | $60.7M | 3.33% | 00.0% | Unchanged |
| Enavate Sciences GP, LLC | 3,761,359 | $83.5M | 25.49% | 00.0% | Unchanged |
| FMR LLC | 4,820,370 | $107.0M | 0.01% | +1,496,836+45.0% | Added |
| Sr One Capital Management, LP | 4,911,539 | $109.0M | 15.77% | 00.0% | Unchanged |
| 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 |