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|4Feb 13, 8:30 PM ET

MITSUI SUMITOMO INSURANCE CO LTD 4

Research Summary

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Updated

W.R. Berkley (WRB) 10% Owner Mitsui Sumitomo Buys Shares

What Happened
Mitsui Sumitomo Insurance Co., Ltd. (a reported 10% owner of W.R. Berkley Corporation) acquired a total of 40,000 WRB shares in open-market purchases on February 12–13, 2026 for aggregate cash of $2,837,252. Individual trades reported: 17,599 shares @ $71.88 ($1,265,030); 2,401 shares @ $72.76 ($174,690); 15,406 shares @ $69.73 ($1,074,336); 4,314 shares @ $70.30 ($303,264); and 280 shares @ $71.18 ($19,932). These were purchases (buying shares), which are generally viewed as a positive sign versus sales, though they were made under a pre-established trading plan.

Key Details

  • Transaction dates: Feb 12, 2026 and Feb 13, 2026. Form 4 filed Feb 13, 2026 (appears timely).
  • Per-trade details (shares, reported weighted-average prices, totals): see the five transactions above; total = 40,000 shares for $2,837,252.
  • Price notes: reported prices are weighted averages; underlying trades spanned ranges (see footnotes for ranges: ~69.3373–73.0501 across the transactions).
  • Plan/authorization: Purchases were effected under a Rule 10b5-1 purchase plan adopted Oct 3, 2025 (footnote F1).
  • Ownership note: Shares are held directly by Mitsui Sumitomo Insurance (MSI). MSI is a wholly‑owned subsidiary of MS&AD Insurance Group Holdings; MS&AD may be deemed to beneficially own the securities but expressly disclaims beneficial ownership except for any pecuniary interest (footnote F3).
  • Shares owned after the transactions: not reported in the excerpt provided.
  • Related filings: Remarks reference agreements and a Schedule 13D (Dec 11, 2025) and disclaimers about WR Berkley & Others LLC (WRBO).

Context

  • This is institutional trading by a 10% shareholder, not an executive’s personal trade. Purchases under a 10b5-1 plan are pre-set automated buys and can reflect a plan-based investment schedule rather than ad-hoc insider conviction.
  • For retail investors, institutional purchases can be notable but should be weighed alongside other factors (company fundamentals, broader insider activity, and market conditions).