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Of the 10 tracked institutions holding ZBIO, 4 have a 3-year clone track record — 4 of them beat the S&P. Average holder's clone alpha: +6.2pt. It's a gauge of who owns the name, not just how many.
Among the 10 tracked institutional investors we monitor, ZBIO (ZENAS BIOPHARMA INC) is held with a combined value of $508.90M across 19,425,324 shares. The largest holder is FMR LLC with a position worth $241.28M (0.01% of their portfolio). Point72 Asset Management, L.P. opened a new position in the most recent quarter. 8 funds increased their holdings. 1 fund reduced its position.
Total Institutional Value
$508.90M
Total Shares Held
19,425,324
Institutional Holders
10
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | FMR LLC | $241.28M | 0.01% | +4.7% |
| 2 | BlackRock, Inc. | $68.18M | 0.00% | +31.8% |
| 3 | VANGUARD GROUP INC | $52.76M | 0.00% | +25.0% |
| 4 | STATE STREET CORP | $52.16M | 0.00% | +39.7% |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | $40.45M | 0.01% | +27.9% |
| 6 | PRICE T ROWE ASSOCIATES INC /MD/ | $31.14M | 0.00% | +243.4% |
| 7 | MILLENNIUM MANAGEMENT LLC | $16.76M | 0.01% | +38.5% |
| 8 | CITADEL ADVISORS LLC | $4.97M | 0.00% | +192.8% |
| 9 | AQR CAPITAL MANAGEMENT LLC | $789.32K | 0.00% | -39.0% |
| 10 | Point72 Asset Management, L.P. | $409.53K | 0.00% | New |
As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of ZBIO with a position worth $241.28M, representing 0.01% of their portfolio. In total, 10 institutional investors hold ZBIO with a combined value of $508.90M.
In the most recent quarter, 1 fund opened a new position in ZBIO. Additionally, 8 increased their holdings and 1 reduced their positions.
Institutional investors hold $508.90M worth of ZBIO stock across 10 positions. The largest institutional holder is FMR LLC with $241.28M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For ZBIO, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their ZBIO positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-08-17 |
SEC Schedule 13D (activist) and 13G (passive) filings for ZBIO. Filed when an investor acquires 5%+ ownership.
Last Close
$32.29
2026-08-21
YTD
-6.4%
61% of 52-week range
