10% owner purchased ~$3.26M of WRB shares in the open market

Past results only. Not a forecast.

Record ID

0001193125-26-089411

Filed / recorded

Mar 4, 2026, 1:00 AM UTC

Added to OQRO

Oct 2, 2026, 12:29 PM UTC

Parser

form4-xml-v1

Data quality

Verified: identifiers matched exactly

Issuer

BERKLEY W R CORP

Issuer CIK

11544

Ticker

WRB

Reporting person

MITSUI SUMITOMO INSURANCE CO LTD

Relationship

10% owner

Security

Common Stock

Table

Non-derivative (Table I)

Transaction date

Mar 2, 2026

Transaction code

P

Shares / units

45,103

Price per share

$72.2854

Acquired / disposed

Acquired (A)

Shares owned after

58,567,377

Ownership form

Direct

Amendment

No

1. The purchases reported on this Form 4 were effected pursuant to a Rule 10b5-1 purchase plan, adopted October 3, 2025.
2. The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $71.72 to $72.69. The Reporting Persons undertake to provide to W.R. Berkley Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote and in footnotes 4, 5 and 6.
3. The shares are held directly by Mitsui Sumitomo Insurance Co., Ltd. ("MSI"). Because MSI is a wholly-owned subsidiary of MS&AD Insurance Group Holdings, Inc. ("MS&AD"), MS&AD may be deemed to beneficially own the reported securities. MS&AD expressly disclaims beneficial ownership of the reported securities, except to the extent of its pecuniary interest therein.

Most active this month

• Dell Technologies124 filings
• Microsoft37 filings
• Seagate Technology34 filings
• CrowdStrike34 filings
• PPGPPG Industries31 filings
• Huntington Ingalls Industries30 filings