MITSUI SUMITOMO INSURANCE CO LTD 4
4 · BERKLEY W R CORP · Filed Feb 27, 2026
Research Summary
AI-generated summary of this filing
Berkley (WRB) 10% Owner Mitsui Sumitomo Buys 300,000 Shares
What Happened Mitsui Sumitomo Insurance Co., Ltd. (a reported 10% owner of W.R. Berkley Corp., WRB) purchased a total of 300,000 WRB shares in open-market transactions across Feb 26–27, 2026. Transactions: 145,491 shares at $71.65 ($10,423,848); 7,509 shares at $72.11 ($541,504); and 147,000 shares at $71.63 ($10,528,963). Total reported purchase value is approximately $21.49 million. These were purchases (buying stock), which are generally considered a bullish capital allocation rather than disposals.
Key Details
- Transaction dates: Feb 26, 2026 (two tranches) and Feb 27, 2026 (one tranche). Filing date: Feb 27, 2026 (timely).
- Prices and values: 145,491 @ $71.65 = $10,423,848; 7,509 @ $72.11 = $541,504; 147,000 @ $71.63 = $10,528,963. Aggregate ~300,000 shares for ~$21.49M.
- Shares owned after transaction: Not specified in the Form 4 provided.
- Notable footnotes: Purchases were made under a Rule 10b5‑1 purchase plan adopted Oct 3, 2025 (F1). Reported prices are weighted averages from multiple executions with disclosed price ranges (F2, F4, F5). Shares held directly by MSI; MS&AD (parent) may be deemed to beneficially own but disclaims ownership except for pecuniary interest (F3). Filing also references agreements with WR Berkley & Others LLC and a Schedule 13D (remarks).
- Transaction code: P = Purchase.
Context This filing reports institutional purchases by a major insurance company (a 10% owner), not an individual executive. Institutional buys of this size (~$21.5M) can reflect portfolio or strategic positioning but do not, by themselves, identify management sentiment. The use of a 10b5‑1 plan indicates the purchases were executed under a pre‑arranged plan adopted Oct 3, 2025.
Insider Transaction Report
- Purchase
Common Stock
[F1][F2][F3]2026-02-26$71.65/sh+145,491$10,423,848→ 58,367,765 total - Purchase
Common Stock
[F1][F4][F3]2026-02-26$72.11/sh+7,509$541,504→ 58,375,274 total - Purchase
Common Stock
[F1][F5][F3]2026-02-27$71.63/sh+147,000$10,528,963→ 58,522,274 total
Footnotes (5)
- [F1]The purchases reported on this Form 4 were effected pursuant to a Rule 10b5-1 purchase plan, adopted October 3, 2025.
- [F2]The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $71.3483 to $71.9977. 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 and 5.
- [F3]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.
- [F4]The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $72.00 to $72.39.
- [F5]The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $71.065 to $72.035.