13F Insight
DOSSIER · 13F Holders · Q1 2026Mega-capCrowded
ZBIO

ZENAS BIOPHARMA INC

141 institutions still hold ZENAS BIOPHARMA INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 98937L105·141 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 7.6%
vs prior quarter
13F value held
$996M
58.0% inst. owned
of float
Holders
141
+38 QoQ
filers reporting
Activity
+97 / −84
+882 added · −907 reduced
this quarter
Concentration
17.83%
FMR LLC #1
top holder share
AI Holders Summary · Q1 2026

141 institutions reported ZBIO in Q1 2026. FMR LLC leads at 17.8% of the visible book. +38 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$178M9.1M0.01%Q1 202602
SR ONE CAPITAL MANAGEMENT, LP
CIK 0001910264
$98M5.0M10.76%Q1 202603
NEA Management Company, LLC
CIK 0001512848
$79M4.0M4.47%Q1 202604
Enavate Sciences GP, LLC
CIK 0001953107
$77M3.9M21.80%Q1 202605
NVP Associates, LLC
CIK 0001545692
$67M1.8M26.16%Q4 202506
FEDERATED HERMES, INC.
CIK 0001056288
$61M3.1M0.10%Q1 202607
Novo Holdings A/S
CIK 0001388325
$53M1.4M4.09%Q4 202508
Polar Capital Holdings Plc
CIK 0001837309
$50M2.5M0.18%Q1 202609
Capital International Investors
CIK 0001562230
$48M2.4M0.01%Q1 202610
Fairmount Funds Management LLC
CIK 0001802528
$46M2.4M3.33%Q1 202611
BlackRock, Inc.
CIK 0002012383
$40M2.0M0.00%Q1 202612
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$33M897K0.01%Q1 202613
STATE STREET CORP
CIK 0000093751
$29M1.5M0.00%Q1 202614
ArrowMark Colorado Holdings LLC
CIK 0001483859
$27M751K0.60%Q4 202515
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$24M1.2M0.00%Q1 202616
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$24M1.2M0.00%Q1 202617
SILVERARC CAPITAL MANAGEMENT, LLC
CIK 0001816307
$22M1.1M2.27%Q1 202618
EcoR1 Capital, LLC
CIK 0001587114
$15M790K0.66%Q1 202619
BALYASNY ASSET MANAGEMENT L.P.
CIK 0001218710
$13M667K0.02%Q1 202620
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$13M656K0.00%Q1 2026
Page 1 of 8
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