William R. Berkley - 04 Mar 2026 SCHEDULE 13D/A Report for W. R. BERKLEY CORPORATION Common Stock, par value $0.20 per share (WRB)

Filing Manager
William R. Berkley
Reporting Manager
William R. Berkley
Security
W. R. BERKLEY CORPORATION Common Stock, par value $0.20 per share
Symbol
WRB
Shares outstanding
374,563,481 shares
Disclosed Ownership
95,551,144 shares
Ownership
26%
Form type
SCHEDULE 13D/A
Filing time
05 Mar 2026, 08:00:02 UTC
Date of event
04 Mar 2026
Previous filing
11 Dec 2025
SEC
View on sec.gov

Reporting Managers (8)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
WR Berkley & Others LLC 26% 95,551,144 63,515,547 32,035,597 /s/ W. Robert Berkley, Jr. W. Robert Berkley, Jr. /Manager
WR Berkley & Others 2 LLC 26% 95,551,144 3,553,486 91,997,658 /s/ W. Robert Berkley, Jr. W. Robert Berkley, Jr. / Manager
William R. Berkley 26% 95,551,144 17,363,285 78,187,859 /s/ William R. Berkley William R. Berkley 0000918186
Marjorie J. Berkley 26% 95,551,144 204,364 95,346,780 /s/ Marjorie J. Berkley Marjorie J. Berkley
W. Robert Berkley, Jr. 26% 95,551,144 4,552,770 90,998,374 /s/ W. Robert Berkley, Jr. W. Robert Berkley, Jr.
The William R. Berkley 2011 GST Trust u/a dated December 20, 2011 26% 95,551,144 1,350,000 94,201,144 /s/ W. Robert Berkley, Jr. W. Robert Berkley, Jr. /Trustee
The William R. Berkley 2022 Family Trust f/b/o William R. Berkley, Jr. and His Issue 26% 95,551,144 4,287,201 91,263,943 /s/ Marjorie J. Berkley Marjorie J. Berkley/Trustee
The William R. Berkley 2022 Family Trust f/b/o Lauren Berkley and Her Issue 26% 95,551,144 724,491 94,826,653 /s/ Marjorie J. Berkley Marjorie J. Berkley/Trustee