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, Q2 2026
Institutional positions in Zenas BioPharma, Inc. as of Jun 30, 2026. 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
- 144
- +6 vs. Q1 2026
- Shares held
- 61.3M
- +3.48M (+6.0%) vs. Q1 2026
- Total value
- $1.55B
- +$404.0M (+35.3%) vs. Q1 2026
- New holders
- 28
- 62 more added
- Sold out
- 22
- 39 more reduced
2 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 | $774.6M |
| Q2 2025 | 73 | $330.0M |
| Q1 2025 | 67 | $256.7M |
| Q4 2024 | 65 | $259.8M |
| 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, Q2 2026
Shares, value and share of portfolio for each institution holding Zenas BioPharma, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 9,506,701 | $241.3M | 0.01% | +424,701+4.7% | Added |
| Sr One Capital Management, LP | 5,037,854 | $127.9M | 12.31% | 00.0% | Unchanged |
| NEA Management Company, LLC | 4,023,219 | $102.1M | 6.43% | 00.0% | Unchanged |
| Enavate Sciences GP, LLC | 3,919,159 | $99.5M | 28.80% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 3,116,805 | $79.1M | 0.11% | −10,226−0.3% | Reduced |
| BlackRock, Inc. | 2,686,225 | $68.2M | 0.00% | +648,677+31.8% | Added |
| Capital International Investors | 2,502,912 | $63.5M | 0.01% | +68,912+2.8% | Added |
| Polar Capital Holdings Plc | 2,412,772 | $61.2M | 0.17% | −135,672−5.3% | Reduced |
| Royalty Pharma Sub-Manager, LLC | 2,388,150 | $60.6M | 25.05% | 00.0% | Unchanged |
| Fairmount Funds Management LLC | 2,359,025 | $59.9M | 3.96% | 00.0% | Unchanged |
| State Street Corp | 2,055,100 | $52.2M | 0.00% | +584,177+39.7% | Added |
| NVP Associates, LLC | 1,838,482 | $46.7M | 14.22% | 00.0% | Unchanged |
| Wellington Management Group LLP | 1,593,819 | $40.5M | 0.01% | +347,766+27.9% | Added |
| Vanguard Capital Management LLC | 1,354,864 | $34.4M | 0.00% | +109,473+8.8% | Added |
| Bank of America Corp | 1,231,159 | $31.2M | 0.00% | +842,812+217.0% | Added |
| Price T Rowe Associates Inc | 1,226,928 | $31.1M | 0.00% | +869,662+243.4% | Added |
| Geode Capital Management, LLC | 882,654 | $22.4M | 0.00% | +226,869+34.6% | Added |
| Alliancebernstein L.P. | 1,103,388 | $21.6M | 0.01% | +206,067+23.0% | Added |
| Two Sigma Investments, LP | 815,150 | $20.7M | 0.02% | +540,094+196.4% | Added |
| EcoR1 Capital, LLC | 789,500 | $20.0M | 0.99% | 00.0% | Unchanged |
| Millennium Management LLC | 660,470 | $16.8M | 0.01% | +183,652+38.5% | Added |
| Woodline Partners LP | 590,539 | $15.0M | 0.05% | +140.0% | Added |
| Balyasny Asset Management LLC | 576,717 | $14.6M | 0.03% | −90,353−13.5% | Reduced |
| ArrowMark Colorado Holdings LLC | 573,318 | $14.6M | 0.61% | −85,591−13.0% | Reduced |
| Silverarc Capital Management, LLC | 509,789 | $12.9M | 1.44% | −626,146−55.1% | Reduced |
| Rock Springs Capital Management LP | 502,077 | $12.7M | 0.62% | 00.0% | Unchanged |
| Pivotal bioVenture Partners Investment Advisor LLC | 490,766 | $12.5M | 4.05% | −101,225−17.1% | Reduced |
| NEXTBio Capital Management LP | 426,736 | $10.8M | 4.98% | 00.0% | Unchanged |
| Vestal Point Capital, LP | 365,000 | $9.26M | 0.22% | +165,000+82.5% | Added |
| Marshall Wace, LLP | 323,442 | $8.21M | 0.01% | −178,486−35.6% | Reduced |
| Jennison Associates LLC | 314,049 | $7.97M | 0.00% | +64,049+25.6% | Added |
| Vanguard Portfolio Management LLC | 304,870 | $7.74M | 0.00% | +53,460+21.3% | Added |
| Charles Schwab Investment Management Inc | 302,085 | $7.67M | 0.00% | +77,683+34.6% | Added |
| Northern Trust Corp | 281,140 | $7.14M | 0.00% | +86,500+44.4% | Added |
| Goldman Sachs Group Inc | 271,163 | $6.88M | 0.00% | −110,298−28.9% | Reduced |
| Vanguard Fiduciary Trust Co | 254,623 | $6.46M | 0.00% | +75,235+41.9% | Added |
| Sphera Funds Management Ltd. | 230,834 | $5.86M | 0.84% | +16,500+7.7% | Added |
| iA Global Asset Management Inc. | 215,130 | $5.46M | 0.06% | −700−0.3% | Reduced |
| Walleye Capital LLC | 209,050 | $5.31M | 0.03% | +83,818+66.9% | Added |
| Sio Capital Management, LLC | 208,557 | $5.29M | 0.91% | −123,173−37.1% | Reduced |
| Citadel Advisors LLC | 195,780 | $4.97M | 0.00% | +128,910+192.8% | Added |
| UBS Group AG | 178,089 | $4.52M | 0.00% | −189,316−51.5% | Reduced |
| Voleon Capital Management LP | 167,145 | $4.24M | 0.08% | +137,533+464.5% | Added |
| BNP Paribas Arbitrage, SA | 151,086 | $3.83M | 0.00% | +141,087+1,411.0% | Added |
| Morgan Stanley | 134,979 | $3.43M | 0.00% | +41,583+44.5% | Added |
| Squarepoint Ops LLC | 125,185 | $3.18M | 0.01% | +82,311+192.0% | Added |
| Barclays PLC | 115,965 | $2.94M | 0.00% | +86,355+291.6% | Added |
| Seven Grand Managers, LLC | 100,000 | $2.54M | 0.10% | 00.0% | Unchanged |
| Birchview Capital, LP | 93,601 | $2.38M | 1.11% | +23,601+33.7% | Added |
| Verition Fund Management LLC | 72,988 | $1.85M | 0.01% | +72,988 | New |
| Bank of New York Mellon Corp | 70,477 | $1.79M | 0.00% | +9,613+15.8% | Added |
| J. Goldman & Co LP | 68,232 | $1.73M | 0.06% | +31,435+85.4% | Added |
| CSM Advisors, LLC | 67,622 | $1.72M | 0.04% | +67,622 | New |
| Nuveen, LLC | 66,638 | $1.69M | 0.00% | −1,132−1.7% | Reduced |
| Alps Advisors Inc | 63,675 | $1.62M | 0.01% | +19,981+45.7% | Added |
| Swiss National Bank | 53,200 | $1.35M | 0.00% | +21,600+68.4% | Added |
| Exome Asset Management LLC | 52,443 | $1.33M | 0.82% | −28,287−35.0% | Reduced |
| Jump Financial, LLC | 51,022 | $1.29M | 0.01% | −8,979−15.0% | Reduced |
| Citigroup Inc | 49,521 | $1.26M | 0.00% | +39,633+400.8% | Added |
| Los Angeles Capital Management LLC | 48,465 | $1.23M | 0.00% | +48,465 | New |
| XTX Topco Ltd | 40,034 | $1.02M | 0.01% | +20,723+107.3% | Added |
| Burkehill Global Management, LP | 40,000 | $1.02M | 0.04% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 37,790 | $959.1K | 0.00% | +22,267+143.4% | Added |
| Rafferty Asset Management, LLC | 37,509 | $952.0K | 0.00% | −10,660−22.1% | Reduced |
| Atom Investors LP | 37,149 | $942.8K | 0.08% | −69,867−65.3% | Reduced |
| Rhumbline Advisers | 34,245 | $869.1K | 0.00% | +7,432+27.7% | Added |
| Boothbay Fund Management, LLC | 33,280 | $844.6K | 0.02% | +33,280 | New |
| AQR Capital Management LLC | 31,100 | $789.3K | 0.00% | −19,871−39.0% | Reduced |
| California State Teachers Retirement System | 29,471 | $748.0K | 0.00% | +13,652+86.3% | Added |
| Deutsche Bank AG | 28,881 | $733.0K | 0.00% | +9,615+49.9% | Added |
| DCF Advisers, LLC | 28,184 | $715.3K | 0.19% | +28,184 | New |
| State of Wisconsin Investment Board | 26,922 | $683.3K | 0.00% | +6,108+29.3% | Added |
| JPMorgan Chase & Co | 24,445 | $660.5K | 0.00% | −664−2.6% | Reduced |
| Wells Fargo & Company | 25,995 | $659.8K | 0.00% | +17,110+192.6% | Added |
| Vanguard Asset Management, Ltd | 20,623 | $523.4K | 0.00% | +9,981+93.8% | Added |
| Legal & General Group Plc | 20,023 | $508.2K | 0.00% | +9,591+91.9% | Added |
| Invesco Ltd. | 18,954 | $481.1K | 0.00% | −94,525−83.3% | Reduced |
| China Universal Asset Management Co., Ltd. | 18,848 | $478.4K | 0.03% | +5,322+39.3% | Added |
| Profund Advisors LLC | 18,838 | $478.1K | 0.01% | −2,578−12.0% | Reduced |
| Allstate Corp | 18,241 | $463.0K | 0.00% | +18+0.1% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 17,423 | $442.9K | 0.00% | +3,037+21.1% | Added |
| Y-Intercept (Hong Kong) Ltd | 17,332 | $439.9K | 0.01% | +17,332 | New |
| MetLife Investment Management | 17,041 | $432.5K | 0.00% | +4,132+32.0% | Added |
| Virtus Investment Advisers, Inc. | 16,525 | $419.4K | 0.10% | +9,808+146.0% | Added |
| Point72 Asset Management, L.P. | 16,136 | $409.5K | 0.00% | +16,136 | New |
| Vanguard Global Advisers, LLC | 15,332 | $389.1K | 0.00% | −5,508−26.4% | Reduced |
| Nordea Investment Management AB | 15,050 | $382.9K | 0.00% | +15,050 | New |
| Brevan Howard Capital Management LP | 14,674 | $372.4K | 0.01% | +14,674 | New |
| Engineers Gate Manager LP | 12,980 | $329.4K | 0.00% | +12,980 | New |
| Russell Investments Group, Ltd. | 12,740 | $323.3K | 0.00% | +10,019+368.2% | Added |
| Creative Planning | 11,723 | $297.5K | 0.00% | −935−7.4% | Reduced |
| VARCOV Co. | 10,505 | $266.6K | 0.10% | +10,505 | New |
| New York State Common Retirement Fund | 10,300 | $261.4K | 0.00% | +4,100+66.1% | Added |
| Massachusetts Financial Services Co | 9,053 | $229.8K | 0.00% | +9,053 | New |
| Scientech Research LLC | 9,028 | $229.1K | 0.19% | −3,924−30.3% | Reduced |
| Dimensional Fund Advisors LP | 8,874 | $225.2K | 0.00% | +8,874 | New |
| HRT Financial LP | 8,879 | $225.0K | 0.00% | −16,870−65.5% | Reduced |
| Quantinno Capital Management LP | 8,581 | $217.8K | 0.00% | −12,545−59.4% | Reduced |
| State of New Jersey Common Pension Fund D | 8,571 | $217.5K | 0.00% | +8,571 | New |
| SG Americas Securities, LLC | 8,442 | $214.0K | 0.00% | +8,442 | New |