ZBIO
Zenas BioPharma, Inc.Company with tickers: ZBIO
CIK
1953926
CUSIP
98937L105
Shares Outstanding
63,133,377
Price History
Institutional Holders
Short Volume
Short Interest
Fails to Deliver
Financials
SEC Filings
Earnings Calls
Insider Trades
Congressional Trades
Holders: 1
Total Value: $39
Total Shares: 2
Institutional Ownership Trend
Holder Concentration
Across 1 13F filers · Δ vs Dec 31, 2025Top Holder
100.0%
+81.0 pts
Top 5
100.0%
+43.4 pts
Top 10
100.0%
+22.8 pts
HHI
10,000
Highly concentrated
+9,151
Quarterly Activity
vs Dec 31, 2025
New
0
Increased
0
Decreased
1
Sold Out
125
Unchanged
0
Holder count:
-125
Institutional value:
-100.0%
Shares held:
-100.0%
Top Buyers
vs Dec 31, 2025No qualifying movers this quarter.
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds |
|---|---|---|
| Small Essential Partners LLC | −1 | 2 |
Top New Positions
vs Dec 31, 2025No new positions this quarter.
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) |
|---|---|---|
| Mega FMR LLC | 7,704,255 | $279,741,497 |
| Small SR ONE CAPITAL MANAGEMENT, LP | 5,037,854 | $182,924,478 |
| Small Enavate Sciences GP, LLC | 3,919,159 | $142,304,663 |
| Mid NEA Management Company, LLC | 3,523,219 | $127,928,081 |
| Large FEDERATED HERMES, INC. | 2,715,578 | $98,602,637 |
| Holder | Value (USD) | % of 13F | Shares | Activity | Type | Discretion | Filed | Action |
|---|---|---|---|---|---|---|---|---|
| Small Essential Partners LLC | $39 | 100.00% | 2 | Reduced | Shares | Sole | 2026-05-21 | View |
| No holders match your search. | ||||||||