UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM
CURRENT REPORT
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| Item 8.01 | Other Events |
On December 5, 2025, W. R. Berkley Corporation (the “Company”) issued a press release announcing that the Company has been informed by representatives of Mitsui Sumitomo Insurance Co., Ltd. (“MSI”) that MSI has acquired beneficial ownership of at least 12.5% of the Company’s outstanding common stock (the “Common Stock”) pursuant to MSI’s previously announced agreements with a company owned by members of the Berkley family and trusts for their benefit. The press release is attached as Exhibit 99.1 and incorporated by reference.
| Item 9.01. | Financial Statements and Exhibits. |
(d) Exhibits.
| Exhibit No. | Description | |
| 99.1 | Press Release, issued December 5, 2025. | |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). | |
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
| W. R. BERKLEY CORPORATION | ||
| By: | /s/ Richard M. Baio | |
| Name: Richard M. Baio | ||
| Title: Executive Vice President – Chief Financial Officer | ||
Date: December 5, 2025