Mitsui Sumitomo Insurance Co Ltd's Form 4 filing
Berkley W R Corp (WRB) · filed Dec 29, 2025
- Accession no.
- 0001193125-25-335622
- Filed
- Dec 29, 2025, 7:00 PM ET
- Trade date
- Dec 23-29, 2025
- Filing delay
- 6 days
- Rule 10b5-1 plan
- Checked
This filing lists 5 non-derivative transactions. Open-market purchases total $62.0M. It was filed 6 days after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Mitsui Sumitomo Insurance Co LtdCIK 0001142206 | 10% Owner |
| MS&AD Insurance Group Holdings, Inc.CIK 0001431048 | 10% Owner |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Dec 23, 2025 | Common Stock | PPurchaseAcquired | +232,546 | $70.31F2 | +$16,350,448.79 | 49,444,484 | Direct | |
| Dec 23, 2025 | Common Stock | PPurchaseAcquired | +2,027 | $71.15F4 | +$144,228.14 | 49,446,511 | Direct | |
| Dec 24, 2025 | Common Stock | PPurchaseAcquired | +220,000 | $70.51F5 | +$15,512,046 | 49,666,511 | Direct | |
| Dec 26, 2025 | Common Stock | PPurchaseAcquired | +220,000 | $70.56F6 | +$15,522,760 | 49,886,511 | Direct | |
| Dec 29, 2025 | Common Stock | PPurchaseAcquired | +205,000 | $70.77F7 | +$14,508,383 | 50,091,511 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- F2
The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $70.1731 to $70.99. 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, 6 and 7.
Referenced by the price of 1 transaction in Table I.
- F4
The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $71.06 to $71.18.
Referenced by the price of 1 transaction in Table I.
- F5
The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $70.13 to $70.64.
Referenced by the price of 1 transaction in Table I.
- F6
The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $70.30 to $70.9844.
Referenced by the price of 1 transaction in Table I.
- F7
The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $70.535 to $70.989.
Referenced by the price of 1 transaction in Table I.
Remarks
MSI, the Issuer and WR Berkley & Others LLC ("WRBO") are party to certain agreements described in, and filed as exhibits to, the Reporting Persons' Schedule 13D filed with the U.S. Securities and Exchange Commission on December 11, 2025. The Reporting Persons disclaim beneficial ownership of the securities of the Issuer owned by WRBO and disclaim that the Reporting Persons and WRBO constitute a "group" within the meaning of Rule 13d-5(b)(1) under the Securities Exchange Act of 1934, as amended.