Zenas BioPharma, Inc. (ZBIO)
Healthcare
Biotechnology
31.40 $
-2.6%
vs. previous close
Closing price · As of: 31. Jul 2026
Who owns Zenas BioPharma, Inc. (ZBIO)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 65.0% of the shares are freely tradable; institutional investors hold 90.5%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
90.5%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
23.2%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
65.0%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
26.3%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
63Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| FMR Inc | 14.39 | 9,082,000 | +17.9 | 03/31/2026 |
| SR ONE CAPITAL MANAGEMENT, LP | 7.98 | 5,037,854 | +2.6 | 12/31/2025 |
| NEA Management Company, LLC | 6.37 | 4,023,219 | +14.2 | 03/31/2026 |
| Enavate Sciences GP, LLC | 6.21 | 3,919,159 | +0.0 | 03/31/2026 |
| Federated Hermes Inc | 4.95 | 3,127,031 | +15.2 | 03/31/2026 |
| Polar Capital Holdings PLC | 4.04 | 2,548,444 | +141.0 | 03/31/2026 |
| Capital Research & Mgmt Co - Division 3 | 3.86 | 2,434,000 | +0.0 | 03/31/2026 |
| Fairmount Funds Management LLC | 3.74 | 2,359,025 | +6.8 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| American Funds SMALLCAP World A | 3.86 | 2,434,000 | +0.0 | 03/31/2026 |
| Polar Capital Biotech S Inc | 3.82 | 2,410,171 | +0.0 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.