13F Insight
DOSSIER · 13F Holders · Q1 2026Financial Services · Fire, Marine & Casualty InsuranceInflation hedgeYield
WRB

BERKLEY W R CORP

971 institutions still hold BERKLEY W R CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 084423102·Fire, Marine & Casualty Insurance·971 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 2.5%
vs prior quarter
13F value held
$12.9B
66.0% inst. owned
of float
Holders
971
+50 QoQ
filers reporting
Activity
+96 / −85
+846 added · −764 reduced
this quarter
Concentration
30.11%
MITSUI SUMITOMO INSURANCE CO LTD #1
top holder share
AI Holders Summary · Q1 2026

971 institutions reported WRB in Q1 2026. MITSUI SUMITOMO INSURANCE CO LTD leads at 30.1% of the visible book. +50 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
MITSUI SUMITOMO INSURANCE CO LTD
CIK 0001142206
$3.9B58.8M100.00%Q1 202602
BlackRock, Inc.
CIK 0002012383
$1.5B23.3M0.03%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$1.3B18.9M0.03%Q1 202604
Vanguard Portfolio Management
CIK 0002100121
$978M14.8M0.05%Q1 202605
STATE STREET CORP
CIK 0000093751
$955M14.4M0.03%Q1 202606
MORGAN STANLEY
CIK 0000895421
$690M10.4M0.04%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$549M8.2M0.03%Q1 202608
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
CIK 0001021223
$515M7.8M1.51%Q1 202609
Invesco Ltd.
CIK 0000914208
$335M5.1M0.05%Q1 202610
FIRST TRUST ADVISORS LP
CIK 0001125816· Index
$263M4.0M0.19%Q1 202611
WELLS FARGO & COMPANY/MN
CIK 0000072971
$251M3.8M0.05%Q1 202612
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$250M3.8M0.05%Q1 202613
JPMORGAN CHASE & CO
CIK 0000019617
$217M3.3M0.01%Q1 202614
UBS Group AG
CIK 0001610520
$217M3.3M0.03%Q1 202615
BANK OF AMERICA CORP /DE/
CIK 0000070858
$193M2.9M0.01%Q1 202616
GOLDMAN SACHS GROUP INC
CIK 0000886982
$189M2.9M0.02%Q1 202617
NORTHERN TRUST CORP
CIK 0000073124· Index
$179M2.7M0.02%Q1 202618
JANUS HENDERSON GROUP PLC
CIK 0001274173
$163M2.5M0.08%Q1 202619
1832 Asset Management L.P.
CIK 0000944388
$152M2.3M0.14%Q1 202620
ROYAL LONDON ASSET MANAGEMENT LTD
CIK 0000863748
$151M2.3M0.32%Q1 2026
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