AI summary pending
View Full Filing (SEC EDGAR)Zenas Biopharma Inc
$33.13+3.6%
+$151.8M
Net Activity
+7.75% total shares
Institutions Holding
149
Popularity Rank
#3699
Avg Weight
0.73%
Total Value
$1.6B
Market Cap
$1.5B
149 institutions currently hold ZBIO, with 94 net buyers and 63 net sellers this quarter.
Institutional Moves (Q2 2026)
Majority Increased
Based on recent trading activity
Net Selling Institutions
63
Net Buying Institutions
94
Top 5 by Value
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Across its top 20 institutional holders, ZBIO's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 26/100, avg. turnover score 43/100).
ZBIO ranks #3699 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
ZBIO is a top-conviction position for Enavate Sciences GP, LLC — at 28.8% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in ZBIO belongs to FMR LLC, but the position matters far more to Enavate Sciences GP, LLC, who has 28.8% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
State Street has added to its ZBIO position for two straight quarters, increasing it by $36.2M to reach $52.2M today.
Invesco Ltd. has trimmed its ZBIO position for two straight quarters, cutting it by $6.3M while still holding $481.1K.
ZBIO is up 3.6% today, and institutions have been net buyers of $151.8M this quarter — today's price move and the underlying institutional flow are pointing the same direction.
ZBIO reported a net loss of $484.4M over the trailing twelve months.
+$214.8M
Total Buy Value
$82.1M
Total Sell Value
94
Net Buyers
63
Net Sellers
ZBIO
Q2 2026
Top 5 Institutional Movers
+$63.7M
+$29.4M
+$28.3M
+$24.2M
ZBIO does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
1
Filings (90d)
$31.91M
Total Est. Value
1.00M shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| Zebra Aggregator, LP | 2026-08-19 | $31.91M |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
1
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| Enavate Sciences GP, LLC | 13D/A | 2026-08-19 | 4.9% |
| SR One Capital Management, LLC | 13D/A | 2026-08-17 | 7.7% |
1
Filings (14d)
AI summary pending
View Full Filing (SEC EDGAR)98937L105
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,242
Total reported value
$2.2T
3229 13F institutions increased their position this quarter
Institutions Holding
5,990
Total reported value
$3.6T
3033 13F institutions increased their position this quarter
Institutions Holding
6,153
Total reported value
$1.8T
2971 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,419
Total reported value
$354.5B
Held by 4419 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,323
Total reported value
$864.3B
Held by 4323 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,246
Total reported value
$320.5B
Held by 4246 institutions — one of the most-tracked stocks on AlphaSMO
Access ZBIO's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/ZBIOCLI
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