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, Q4 2025
Institutional positions in Zenas BioPharma, Inc. as of Dec 31, 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
- 119
- +39 vs. Q3 2025
- Shares held
- 42.8M
- +8.00M (+23.0%) vs. Q3 2025
- Total value
- $1.55B
- +$776.2M (+100.2%) vs. Q3 2025
- New holders
- 47
- 37 more added
- Sold out
- 8
- 24 more reduced
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Zenas BioPharma, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 7,704,255 | $279.7M | 0.01% | +2,883,885+59.8% | Added |
| Sr One Capital Management, LP | 5,037,854 | $182.9M | 25.90% | +126,315+2.6% | Added |
| Enavate Sciences GP, LLC | 3,919,159 | $142.3M | 28.08% | +157,800+4.2% | Added |
| NEA Management Company, LLC | 3,523,219 | $127.9M | 6.52% | +789,500+28.9% | Added |
| Federated Hermes, Inc. | 2,715,578 | $98.6M | 0.16% | +853,740+45.9% | Added |
| Fairmount Funds Management LLC | 2,209,025 | $80.2M | 6.11% | +316,219+16.7% | Added |
| NVP Associates, LLC | 1,838,482 | $66.8M | 26.16% | 00.0% | Unchanged |
| BlackRock, Inc. | 1,767,518 | $64.2M | 0.00% | +538,877+43.9% | Added |
| Vanguard Group Inc | 1,453,065 | $52.8M | 0.00% | +290,307+25.0% | Added |
| Novo Holdings A/S | 1,450,000 | $52.6M | 4.09% | −550,000−27.5% | Reduced |
| Royalty Pharma Sub-Manager, LLC | 1,263,150 | $45.9M | 26.77% | +1,263,150 | New |
| Polar Capital Holdings Plc | 1,057,609 | $38.4M | 0.18% | +1,057,609 | New |
| Wellington Management Group LLP | 855,334 | $31.1M | 0.01% | −2,190−0.3% | Reduced |
| Vivo Capital, LLC | 853,495 | $31.0M | 2.00% | −329,765−27.9% | Reduced |
| EcoR1 Capital, LLC | 789,500 | $28.7M | 1.31% | +789,500 | New |
| ArrowMark Colorado Holdings LLC | 751,161 | $27.3M | 0.60% | −73,507−8.9% | Reduced |
| Pivotal bioVenture Partners Investment Advisor LLC | 591,991 | $21.5M | 8.31% | −187,054−24.0% | Reduced |
| Geode Capital Management, LLC | 588,393 | $21.4M | 0.00% | +118,358+25.2% | Added |
| Rock Springs Capital Management LP | 502,077 | $18.2M | 0.94% | −78,600−13.5% | Reduced |
| State Street Corp | 438,294 | $15.9M | 0.00% | +60,809+16.1% | Added |
| Price T Rowe Associates Inc | 369,248 | $13.4M | 0.00% | −5,050−1.3% | Reduced |
| NEXTBio Capital Management LP | 321,983 | $11.7M | 6.86% | +321,983 | New |
| Point72 Asset Management, L.P. | 368,400 | $9.21M | 0.01% | +368,400 | New |
| Charles Schwab Investment Management Inc | 213,193 | $7.74M | 0.00% | +34,797+19.5% | Added |
| Balyasny Asset Management LLC | 193,153 | $7.01M | 0.01% | +193,153 | New |
| Invesco Ltd. | 187,968 | $6.83M | 0.00% | +42,172+28.9% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 163,860 | $5.95M | 0.02% | +163,860 | New |
| Northern Trust Corp | 155,366 | $5.64M | 0.00% | +22,088+16.6% | Added |
| Voloridge Investment Management, LLC | 133,439 | $4.85M | 0.02% | +133,439 | New |
| Goldman Sachs Group Inc | 130,698 | $4.75M | 0.00% | +130,698 | New |
| Morgan Stanley | 128,335 | $4.66M | 0.00% | +39,602+44.6% | Added |
| Eversept Partners, LP | 121,016 | $4.39M | 0.25% | −37,726−23.8% | Reduced |
| Superstring Capital Management LP | 83,353 | $3.03M | 1.62% | −13,312−13.8% | Reduced |
| AQR Capital Management LLC | 78,220 | $2.84M | 0.00% | +53,636+218.2% | Added |
| UBS Group AG | 69,495 | $2.52M | 0.00% | +34,003+95.8% | Added |
| Bank of New York Mellon Corp | 51,802 | $1.88M | 0.00% | +10,114+24.3% | Added |
| Schroder Investment Management Group | 50,636 | $1.85M | 0.00% | −61,976−55.0% | Reduced |
| Nuveen, LLC | 50,850 | $1.85M | 0.00% | +30,331+147.8% | Added |
| Millennium Management LLC | 49,160 | $1.78M | 0.00% | −22,690−31.6% | Reduced |
| Bank of America Corp | 47,160 | $1.71M | 0.00% | +32,351+218.5% | Added |
| Alps Advisors Inc | 44,077 | $1.60M | 0.01% | +24,035+119.9% | Added |
| Barclays PLC | 34,377 | $1.25M | 0.00% | +11,501+50.3% | Added |
| Swiss National Bank | 31,600 | $1.15M | 0.00% | +31,600 | New |
| Citadel Advisors LLC | 24,459 | $888.1K | 0.00% | +24,459 | New |
| Rhumbline Advisers | 21,946 | $796.9K | 0.00% | +732+3.5% | Added |
| JPMorgan Chase & Co | 21,726 | $788.9K | 0.00% | +15,178+231.8% | Added |
| Wells Fargo & Company | 21,151 | $768.0K | 0.00% | +8,696+69.8% | Added |
| Alliancebernstein L.P. | 18,350 | $666.3K | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 15,701 | $570.1K | 0.00% | +14,556+1,271.3% | Added |
| Squarepoint Ops LLC | 15,541 | $564.3K | 0.00% | +15,541 | New |
| Two Sigma Investments, LP | 15,100 | $548.3K | 0.00% | −5,282−25.9% | Reduced |
| Voya Investment Management LLC | 14,725 | $534.7K | 0.00% | +14,725 | New |
| Susquehanna International Group, LLP | 13,678 | $496.6K | 0.00% | +13,678 | New |
| China Universal Asset Management Co., Ltd. | 13,314 | $483.4K | 0.04% | +13,314 | New |
| Legal & General Group Plc | 13,027 | $473.0K | 0.00% | +11,673+862.1% | Added |
| Deutsche Bank AG | 12,781 | $464.1K | 0.00% | +554+4.5% | Added |
| Creative Planning | 12,273 | $445.6K | 0.00% | +391+3.3% | Added |
| XTX Topco Ltd | 12,183 | $442.4K | 0.01% | +12,183 | New |
| Los Angeles Capital Management LLC | 14,447 | $431.7K | 0.00% | +14,447 | New |
| State of Wisconsin Investment Board | 10,221 | $371.1K | 0.00% | +10,221 | New |
| Voleon Capital Management LP | 10,187 | $369.9K | 0.01% | +10,187 | New |
| MetLife Investment Management | 10,100 | $366.7K | 0.00% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 9,127 | $331.4K | 0.00% | +9,127 | New |
| Gsa Capital Partners LLP | 8,956 | $325.0K | 0.03% | +8,956 | New |
| Intech Investment Management LLC | 8,863 | $321.8K | 0.00% | +8,863 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 8,780 | $318.8K | 0.00% | +1,319+17.7% | Added |
| UBS Asset Management Americas Inc | 8,400 | $305.0K | 0.00% | +8,400 | New |
| Janus Henderson Group PLC | 7,900 | $286.6K | 0.00% | +7,900 | New |
| Mariner, LLC | 7,676 | $278.7K | 0.00% | +7,676 | New |
| VARCOV Co. | 7,335 | $266.3K | 0.11% | +7,335 | New |
| BNP Paribas Arbitrage, SA | 7,138 | $259.2K | 0.00% | +3,992+126.9% | Added |
| Marshall Wace, LLP | 7,100 | $257.8K | 0.00% | +7,100 | New |
| Virtus Investment Advisers, Inc. | 6,554 | $238.0K | 0.06% | +6,554 | New |
| Manufacturers Life Insurance Company, The | 6,256 | $227.2K | 0.00% | +6,256 | New |
| New York State Common Retirement Fund | 6,200 | $225.1K | 0.00% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 6,173 | $224.1K | 0.00% | +6,173 | New |
| The PNC Financial Services Group, Inc. | 5,824 | $211.5K | 0.00% | −19−0.3% | Reduced |
| ProShare Advisors LLC | 5,820 | $211.3K | 0.00% | +5,820 | New |
| Police & Firemen's Retirement System of New Jersey | 4,499 | $163.4K | 0.00% | 00.0% | Unchanged |
| KLP Kapitalforvaltning AS | 3,400 | $123.5K | 0.00% | +3,400 | New |
| STRS Ohio | 2,800 | $101.7K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 2,608 | $94.7K | 0.00% | +2,608 | New |
| Citigroup Inc | 2,351 | $85.4K | 0.00% | +2,163+1,150.5% | Added |
| CWM, LLC | 2,178 | $79.0K | 0.00% | +709+48.3% | Added |
| Simplex Trading, LLC | 1,974 | $71.7K | 0.00% | +1,974 | New |
| Ameritas Investment Partners, Inc. | 1,368 | $49.7K | 0.00% | −240−14.9% | Reduced |
| Russell Investments Group, Ltd. | 1,345 | $48.8K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 1,087 | $39.5K | 0.00% | −34−3.0% | Reduced |
| GF Fund Management Co. Ltd. | 1,054 | $38.3K | 0.00% | +1,054 | New |
| US Bancorp | 884 | $32.1K | 0.00% | −69−7.2% | Reduced |
| Tower Research Capital LLC (TRC) | 795 | $28.9K | 0.00% | −593−42.7% | Reduced |
| Amalgamated Bank | 593 | $22.0K | 0.00% | +69+13.2% | Added |
| Royal Bank of Canada | 544 | $20.0K | 0.00% | −11,337−95.4% | Reduced |
| Signaturefd, LLC | 389 | $14.1K | 0.00% | +57+17.2% | Added |
| GAMMA Investing LLC | 179 | $6.50K | 0.00% | −4−2.2% | Reduced |
| Daiwa Securities Group Inc. | 179 | $6.00K | 0.00% | +179 | New |
| Nisa Investment Advisors, LLC | 115 | $4.18K | 0.00% | 00.0% | Unchanged |
| Torren Management, LLC | 95 | $3.45K | 0.00% | +95 | New |
| J.Safra Asset Management Corp | 92 | $3.34K | 0.00% | +92 | New |
| Farther Finance Advisors, LLC | 86 | $3.12K | 0.00% | +62+258.3% | Added |