ZENAS BIOPHARMA INC ZBIO
$27.23
-2.7% 52w: $15.20 – $43.17
Latest 13F among current holders filed 5 days ago (Aug 28, 2026)
Price — last 12 months
research preview data15.2029.1843.17
Aug 18, 2025 Jul 2, 2026
Institutional holders
140
+21 QoQ
13F value
$1.15B
-25.9% QoQ
Smart-money holders
19
signal tier ≥ 2
New smart buyers
10
Q1 2026
Options barometer
1.3×
$3.5M calls / $2.7M puts
Institutional value by quarter
Number of holders
Who owns ZBIO?
Q1 2026 filings| Fund | Type | Shares | Value | % of fund | Change |
|---|---|---|---|---|---|
| FMR LLC | Long only active | 9.1M | $177.6M | 0.0% | +17.9% |
| SR One Capital Management, LP ★3 | Fundamental concentrated | 5.0M | $98.5M | — | Held |
| NEA Management Company, LLC ★3 | Fundamental concentrated | 4.0M | $78.7M | — | +14.2% |
| ENAVATE SCIENCES GP, LLC ★2 | Fundamental diversified | 3.9M | $76.6M | — | Held |
| FEDERATED HERMES, INC. | Diversified mechanical | 3.1M | $61.1M | — | +15.2% |
| Polar Capital Holdings Plc | Other | 2.5M | $49.8M | — | +141.0% |
| Capital International Investors | Long only active | 2.4M | $47.6M | 0.0% | New |
| Royalty Pharma Sub-Manager, LLC ★2 | Fundamental diversified | 2.4M | $46.7M | — | +89.1% |
| Fairmount Funds Management LLC ★3 | Fundamental concentrated | 2.4M | $46.1M | — | +6.8% |
| BlackRock, Inc. | Index provider | 2.0M | $39.8M | 0.0% | +15.3% |
| NVP ASSOCIATES, LLC ★2 | Fundamental diversified | 1.8M | $35.9M | — | Held |
| ALLIANCEBERNSTEIN L.P. | Long only active | 897.3K | $32.6M | 0.0% | +4790.0% |
| STATE STREET CORP | Index provider | 1.5M | $28.8M | 0.0% | +235.6% |
| WELLINGTON MANAGEMENT GROUP LLP | Long only active | 1.2M | $24.4M | 0.0% | +45.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | Diversified mechanical | 1.2M | $24.3M | — | — |
| SILVERARC CAPITAL MANAGEMENT, LLC ★2 | Fundamental diversified | 1.1M | $22.2M | — | New |
| EcoR1 Capital, LLC ★2 | Fundamental concentrated | 789.5K | $15.4M | — | Held |
| Balyasny Asset Management L.P. | Multistrat pod | 667.1K | $13.0M | 0.0% | +245.4% |
| ArrowMark Colorado Holdings LLC | Other | 658.9K | $12.9M | — | -12.3% |
| GEODE CAPITAL MANAGEMENT, LLC | Index provider | 655.8K | $12.8M | — | +11.5% |
| Pivotal bioVenture Partners Investment Advisor LLC ★3 | Fundamental concentrated | 592.0K | $11.6M | — | Held |
| Woodline Partners LP | Other | 590.5K | $11.5M | — | New |
| GREAT POINT PARTNERS LLC ★2 | Fundamental concentrated | 524.1K | $10.2M | — | New |
| Rock Springs Capital Management LP ★2 | Fundamental diversified | 502.1K | $9.8M | — | Held |
| MARSHALL WACE, LLP | Quant stat arb | 501.9K | $9.8M | — | +6969.4% |
| MILLENNIUM MANAGEMENT LLC | Multistrat pod | 476.8K | $9.3M | 0.0% | +869.9% |
| NEXTBio Capital Management LP ★3 | Fundamental concentrated | 426.7K | $8.3M | — | +32.5% |
| BANK OF AMERICA CORP /DE/ | Bank broker | 388.3K | $7.6M | 0.0% | +723.5% |
| GOLDMAN SACHS GROUP INC | Bank broker | 381.5K | $7.5M | 0.0% | +191.9% |
| UBS Group AG | Bank broker | 367.4K | $7.2M | 0.0% | +428.7% |
| PRICE T ROWE ASSOCIATES INC /MD/ | Diversified mechanical | 357.3K | $7.0M | 0.0% | -3.2% |
| Sio Capital Management, LLC ★2 | Fundamental concentrated | 331.7K | $6.5M | — | New |
| TWO SIGMA INVESTMENTS, LP | Quant stat arb | 275.1K | $5.4M | 0.0% | +1721.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Diversified mechanical | 251.4K | $4.9M | — | — |
| JENNISON ASSOCIATES LLC | Other | 250.0K | $4.9M | 0.0% | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Index provider | 224.4K | $4.4M | — | +5.3% |
| Jefferies Financial Group Inc. | Diversified mechanical | 219.9K | $4.3M | 0.1% | New |
| iA Global Asset Management Inc. | Other | 215.8K | $4.2M | 0.1% | New |
| SPHERA FUNDS MANAGEMENT LTD. | Other | 214.3K | $4.2M | — | New |
| Vestal Point Capital, LP ★2 | Fundamental diversified | 200.0K | $3.9M | — | New |
| NORTHERN TRUST CORP | Index provider | 194.6K | $3.8M | 0.0% | +25.3% |
| VANGUARD FIDUCIARY TRUST CO | Diversified mechanical | 179.4K | $3.5M | — | — |
| Monashee Investment Management LLC ★2 | Fundamental diversified | 3.2M | $3.2M | — | New |
| SEB Asset Management AB | Other | 163.9K | $3.2M | — | — |
| Maven Securities LTD | Quant stat arb | 150.0K | $2.9M | 0.2% | New |
| Monashee Investment Management LLC ★2 | Fundamental diversified | 150.0K | $2.9M | — | New |
| Walleye Capital LLC | Multistrat pod | 125.2K | $2.4M | 0.0% | New |
| Invesco Ltd. | Index provider | 113.5K | $2.2M | 0.0% | -39.6% |
| Atom Investors LP | Quant stat arb | 107.0K | $2.1M | 0.1% | New |
| SEVEN GRAND MANAGERS, LLC ★2 | Fundamental diversified | 100.0K | $2.0M | — | New |
Exits are not a bearish signal: our backtest shows stocks specialists exit keep outperforming for 3+ quarters — selling usually means profit-taking, not a forecast.
Explore related
Top funds holding ZBIO
More healthcare stocks held by institutions