ZBIO Institutional Ownership
Who owns Zenas BioPharma, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 145 funds reported holding ZBIO at Jun 30, 2026, together owning 94.0% of the company.
- ▲87 buying vs 63 selling
- ▼Held by funds -1.8 pts
- ▲Funds holding +3
- ▲Superinvestors: 3 added, 0 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 145 | 142 | +2.1% |
| In funds' top 10 | 8 | 8 | 0.0% |
| 13F shares | 61.3M | 62.4M | −1.9% |
| Held by funds | 94.0% | 95.8% | −1.8 pts |
| New positions | 27 | 46 | −41.3% |
| Increased | 60 | 58 | +3.4% |
| Reduced | 39 | 17 | +129.4% |
| Sold out | 24 | 28 | −14.3% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ZBIO
All superinvestors →
Who owns ZBIO
share of fund held shares- Index and passive funds13.4%
- Active managers and hedge funds82.5%
- Banks and brokers3.9%
- Pensions, insurers and other0.2%
The top 10 holders own 61.9% of all ZBIO shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
20 funds changed their position- iA Global Asset Management Inc.Trimmed−160K sh
- Alps Advisors IncAdded+23K sh
- Y-Intercept (Hong Kong) LtdSold out−17K sh
- Arizona State Retirement SystemNew+7,575 sh
- China Universal Asset Management Co., Ltd.Trimmed−6,956 sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Fmr LLC | 14.59% | 9.5M | $241M | +425K |
| 2 | SR One Capital Management, LP | 7.73% | 5M | $128M | 0 |
| 3 | NEA Management Company, LLC | 6.17% | 4M | $102M | 0 |
| 4 | Enavate Sciences Gp, LLC | 6.01% | 3.9M | $99.5M | 0 |
| 5 | Federated Hermes, Inc. | 4.78% | 3.1M | $79.1M | −10K |
| 6 | BlackRock, Inc. | 4.12% | 2.7M | $68.2M | +649K |
| 7 | Capital International Investors | 3.84% | 2.5M | $63.5M | +69K |
| 8 | Polar Capital Holdings Plc | 3.70% | 2.4M | $61.2M | −136K |
| 9 | Royalty Pharma Sub-Manager, LLC | 3.66% | 2.4M | $60.6M | 0 |
| 10 | Fairmount Funds Management LLC | 3.62% | 2.4M | $59.9M | 0 |
- Price T Rowe Associates Inc /md/+870K sh+$22.1M
- Bank of America Corp /de/+843K sh+$21.4M
- BlackRock, Inc.+649K sh+$16.5M
- State Street Corp+584K sh+$14.8M
- Two Sigma Investments, LP+540K sh+$13.7M
- Fmr LLC+425K sh+$10.8M
- Wellington Management Group LLP+348K sh+$8.8M
- Geode Capital Management, LLC+227K sh+$5.8M
- Silverarc Capital Management, LLC−626K sh−$15.9M
- Great Point Partners LLC−524K sh−$10.2M
- UBS Group AG−189K sh−$4.8M
- Marshall Wace, LLP−178K sh−$4.5M
- Jefferies Financial Group Inc.−220K sh−$4.3M
- Polar Capital Holdings Plc−136K sh−$3.4M
- Monashee Investment Management LLC−3.2M sh−$3.2M
- SEB Asset Management AB−164K sh−$3.2M
ZBIO institutional ownership FAQ
Who owns the most ZBIO stock?
In Q2 2026 13F filings the largest holder of ZBIO was Fmr LLC, followed by SR One Capital Management, LP and NEA Management Company, LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of ZBIO is owned by institutions?
Funds that file 13F reports held 94.0% of ZBIO's shares at Jun 30, 2026, compared with 95.8% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ZBIO?
In Q2 2026, 87 funds bought ZBIO (27 of them new positions) and 63 sold (24 sold out completely). Among well known investors, 3 added and 0 cut. Our fund sentiment for ZBIO is bullish.
What is ZBIO's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this ZBIO ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.