William R. Berkley Jr. - 03 Aug 2026 Form 4 Insider Report for BERKLEY W R CORP (WRB)

Reporting relationship: Chairman, President and CEO, Director, 10%+ Owner
Issuer ticker: WRB
Reported as of: 03 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Aug 2026, 16:51:42 UTC
Prior SEC filing: 04 Jun 2026
Source filing: View source filing
Reporting owner signature: William R. Berkley, Jr.

Key filing fact

William R. Berkley Jr. filed Form 4 for BERKLEY W R CORP (WRB) on 05 Aug 2026.

Key facts

This page summarizes William R. Berkley Jr.'s Form 4 filing for BERKLEY W R CORP (WRB).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 05 Aug 2026, 16:51.

Change

Previous filing in this sequence was filed on 04 Jun 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001236253 Primary reporting owner

BERKLEY WILLIAM R JR

Relationship: Chairman, President and CEO, Director, 10%+ Owner
Address: W. R. BERKLEY CORPORATION, 475 STEAMBOAT ROAD, GREENWICH
Signature: William R. Berkley, Jr.
Signature date: 05 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

WRB transaction

Common Stock

Award

Transaction value
Shares: +98,593
Change %: +2.2%
Price: $0.000000^*
Shares after: 4,654,453
Date: 03 Aug 2026
Ownership: Direct
Footnotes: F1

WRB transaction

Common Stock

Tax liability

Transaction value
Shares: -4,139
Change %: -0.09%
Price: $72.29^*
Shares after: 4,650,314
Date: 03 Aug 2026
Ownership: Direct
Footnotes: F2, F3

WRB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 63,515,547
Date: 03 Aug 2026
Ownership: By WR Berkley & Others LLC
Footnotes: F4

WRB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,553,486
Date: 03 Aug 2026
Ownership: By WR Berkley & Others 2 LLC
Footnotes: F4

WRB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,350,000
Date: 03 Aug 2026
Ownership: By William R. Berkley 2011 GST Trust

WRB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 17,675,925
Date: 03 Aug 2026
Ownership: By Estate of William R. Berkley
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Represents the vesting of tranches of performance-based restricted stock units ("RSUs") granted in 2021, 2022 and 2023 under the W. R. Berkley Corporation 2018 Stock Incentive Plan for the three-year performance period ending June 30, 2026 (consisting of 38,841 shares; 29,264 shares; and 30,488 shares, respectively).

Footnote F2

Represents payment of tax liability by withholding securities incident to the vesting of RSUs.

Footnote F3

Includes 3,275,694 shares of common stock underlying RSUs, all of which have vested (the receipt of which has been deferred) and does not include unvested shares of common stock underlying performance-based RSUs.

Footnote F4

Mr. William R. Berkley, Jr. is the manager of the limited liability company. The estate of William R. Berkley (the "Estate") and certain family trusts are the owners of the limited liability company, as set forth in the Schedule 13D/A dated July 21, 2026.

Footnote F5

The reporting person is co-executor of the Estate.