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 | $774.5M |
| 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, 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 |
|---|---|---|---|---|---|
| BNP Paribas Arbitrage, SA | 151,086 | $3.83M | 0.00% | +141,087+1,411.0% | Added |
| Voleon Capital Management LP | 167,145 | $4.24M | 0.08% | +137,533+464.5% | Added |
| UBS Group AG | 178,089 | $4.52M | 0.00% | −189,316−51.5% | Reduced |
| Citadel Advisors LLC | 195,780 | $4.97M | 0.00% | +128,910+192.8% | Added |
| Sio Capital Management, LLC | 208,557 | $5.29M | 0.91% | −123,173−37.1% | Reduced |
| Walleye Capital LLC | 209,050 | $5.31M | 0.03% | +83,818+66.9% | Added |
| iA Global Asset Management Inc. | 215,130 | $5.46M | 0.06% | −700−0.3% | Reduced |
| Sphera Funds Management Ltd. | 230,834 | $5.86M | 0.84% | +16,500+7.7% | Added |
| Vanguard Fiduciary Trust Co | 254,623 | $6.46M | 0.00% | +75,235+41.9% | Added |
| Goldman Sachs Group Inc | 271,163 | $6.88M | 0.00% | −110,298−28.9% | Reduced |
| Northern Trust Corp | 281,140 | $7.14M | 0.00% | +86,500+44.4% | Added |
| Charles Schwab Investment Management Inc | 302,085 | $7.67M | 0.00% | +77,683+34.6% | Added |
| Vanguard Portfolio Management LLC | 304,870 | $7.74M | 0.00% | +53,460+21.3% | Added |
| Jennison Associates LLC | 314,049 | $7.97M | 0.00% | +64,049+25.6% | Added |
| Marshall Wace, LLP | 323,442 | $8.21M | 0.01% | −178,486−35.6% | Reduced |
| Vestal Point Capital, LP | 365,000 | $9.26M | 0.22% | +165,000+82.5% | Added |
| NEXTBio Capital Management LP | 426,736 | $10.8M | 4.98% | 00.0% | Unchanged |
| Pivotal bioVenture Partners Investment Advisor LLC | 490,766 | $12.5M | 4.05% | −101,225−17.1% | Reduced |
| Rock Springs Capital Management LP | 502,077 | $12.7M | 0.62% | 00.0% | Unchanged |
| Silverarc Capital Management, LLC | 509,789 | $12.9M | 1.44% | −626,146−55.1% | Reduced |
| ArrowMark Colorado Holdings LLC | 573,318 | $14.6M | 0.61% | −85,591−13.0% | Reduced |
| Balyasny Asset Management LLC | 576,717 | $14.6M | 0.03% | −90,353−13.5% | Reduced |
| Woodline Partners LP | 590,539 | $15.0M | 0.05% | +140.0% | Added |
| Millennium Management LLC | 660,470 | $16.8M | 0.01% | +183,652+38.5% | Added |
| EcoR1 Capital, LLC | 789,500 | $20.0M | 0.99% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 815,150 | $20.7M | 0.02% | +540,094+196.4% | Added |
| Alliancebernstein L.P. | 1,103,388 | $21.6M | 0.01% | +206,067+23.0% | Added |
| Geode Capital Management, LLC | 882,654 | $22.4M | 0.00% | +226,869+34.6% | Added |
| Price T Rowe Associates Inc | 1,226,928 | $31.1M | 0.00% | +869,662+243.4% | Added |
| Bank of America Corp | 1,231,159 | $31.2M | 0.00% | +842,812+217.0% | Added |
| Vanguard Capital Management LLC | 1,354,864 | $34.4M | 0.00% | +109,473+8.8% | Added |
| Wellington Management Group LLP | 1,593,819 | $40.5M | 0.01% | +347,766+27.9% | Added |
| NVP Associates, LLC | 1,838,482 | $46.7M | 14.22% | 00.0% | Unchanged |
| State Street Corp | 2,055,100 | $52.2M | 0.00% | +584,177+39.7% | Added |
| Fairmount Funds Management LLC | 2,359,025 | $59.9M | 3.96% | 00.0% | Unchanged |
| Royalty Pharma Sub-Manager, LLC | 2,388,150 | $60.6M | 25.05% | 00.0% | Unchanged |
| Polar Capital Holdings Plc | 2,412,772 | $61.2M | 0.17% | −135,672−5.3% | Reduced |
| Capital International Investors | 2,502,912 | $63.5M | 0.01% | +68,912+2.8% | Added |
| BlackRock, Inc. | 2,686,225 | $68.2M | 0.00% | +648,677+31.8% | Added |
| Federated Hermes, Inc. | 3,116,805 | $79.1M | 0.11% | −10,226−0.3% | Reduced |
| Enavate Sciences GP, LLC | 3,919,159 | $99.5M | 28.80% | 00.0% | Unchanged |
| NEA Management Company, LLC | 4,023,219 | $102.1M | 6.43% | 00.0% | Unchanged |
| Sr One Capital Management, LP | 5,037,854 | $127.9M | 12.31% | 00.0% | Unchanged |
| FMR LLC | 9,506,701 | $241.3M | 0.01% | +424,701+4.7% | Added |
| Great Point Partners LLC | 0 | $0 | 0.00% | −524,066−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −219,947−100.0% | Sold out |
| SEB Asset Management AB | 0 | $0 | 0.00% | −163,860−100.0% | Sold out |
| Monashee Investment Management LLC | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| Maven Securities LTD | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −85,005−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −77,493−100.0% | Sold out |
| DAFNA Capital Management LLC | 0 | $0 | 0.00% | −42,500−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −33,697−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −27,532−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −18,640−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −17,638−100.0% | Sold out |
| CI Private Wealth, LLC | 0 | $0 | 0.00% | −16,845−100.0% | Sold out |
| Prelude Capital Management, LLC | 0 | $0 | 0.00% | −16,645−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −13,331−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −12,386−100.0% | Sold out |
| STRS Ohio | 0 | $0 | 0.00% | −2,800−100.0% | Sold out |
| Fifth Third Bancorp | 0 | $0 | 0.00% | −107−100.0% | Sold out |
| SBI Securities Co., Ltd. | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Stone House Investment Management, LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| CWM, LLC | – | – | – | – | Not filed |
| Sunbelt Securities, Inc. | – | – | – | – | Not filed |