Who owns Zenas BioPharma, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ZBIO from SEC Form 13F filings across 144 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 144 institutions disclosed 61.3M shares of Zenas BioPharma, Inc. worth $1.55B — about 97.1% of shares outstanding; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
144
13F holders
$1.55B
value, 2026 filers
97.1%
of shares outstanding (61.3M sh)
29
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ZBIO's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 9.5M | $241.3M | 0.0% | 15.1% | +4.7% |
| 2 | SR One Capital Management, LP | 5.0M | $127.9M | 12.3% | 8% | 0.0% |
| 3 | NEA Management Company, LLC | 4.0M | $102.1M | 6.4% | 6.4% | 0.0% |
| 4 | ENAVATE SCIENCES GP, LLC | 3.9M | $99.5M | 28.8% | 6.2% | 0.0% |
| 5 | FEDERATED HERMES, INC. | 3.1M | $79.1M | 0.1% | 4.9% | -0.3% |
| 6 | BlackRock, Inc. | 2.7M | $68.2M | 0.0% | 4.3% | +31.8% |
| 7 | Capital International Investors | 2.5M | $63.5M | 0.0% | 4% | +2.8% |
| 8 | Polar Capital Holdings Plc | 2.4M | $61.2M | 0.1% | 3.8% | -5.3% |
| 9 | Royalty Pharma Sub-Manager, LLCNEW | 2.4M | $60.6M | 25.1% | 3.8% | new |
| 10 | Fairmount Funds Management LLC | 2.4M | $59.9M | 4.0% | 3.7% | 0.0% |
| 11 | STATE STREET CORP | 2.1M | $52.2M | 0.0% | 3.3% | +39.7% |
| 12 | NVP ASSOCIATES, LLC | 1.8M | $46.7M | 14.2% | 2.9% | 0.0% |
| 13 | WELLINGTON MANAGEMENT GROUP LLP | 1.6M | $40.5M | 0.0% | 2.5% | +27.9% |
| 14 | VANGUARD CAPITAL MANAGEMENT LLC | 1.4M | $34.4M | 0.0% | 2.1% | +8.8% |
| 15 | BANK OF AMERICA CORP /DE/ | 1.2M | $31.2M | 0.0% | 2% | +217.0% |
| 16 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.2M | $31.1M | 0.0% | 1.9% | +243.4% |
| 17 | ALLIANCEBERNSTEIN L.P. | 1.1M | $21.6M | 0.0% | 1.7% | +23.0% |
| 18 | GEODE CAPITAL MANAGEMENT, LLC | 882,654 | $22.4M | 0.0% | 1.4% | +34.6% |
| 19 | TWO SIGMA INVESTMENTS, LP | 815,150 | $20.7M | 0.0% | 1.3% | +196.4% |
| 20 | EcoR1 Capital, LLC | 789,500 | $20.0M | 1.0% | 1.3% | 0.0% |
| 21 | MILLENNIUM MANAGEMENT LLC | 660,470 | $16.8M | 0.0% | 1% | +38.5% |
| 22 | Woodline Partners LP | 590,539 | $15.0M | 0.0% | 0.9% | 0.0% |
| 23 | Balyasny Asset Management L.P. | 576,717 | $14.6M | 0.0% | 0.9% | -13.5% |
| 24 | ArrowMark Colorado Holdings LLC | 573,318 | $14.6M | 0.6% | 0.9% | -13.0% |
| 25 | SILVERARC CAPITAL MANAGEMENT, LLC | 509,789 | $12.9M | 1.3% | 0.8% | -55.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.