Form4insider filings, from the source

Insider · CIK 0002026387

Marie Angela Mattson

Files at: WRB. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Jun 3, 2026 AForm 4 →Jun 4, 5:00 pm EDTBERKLEY W R CORPWRB3,090——9,667—

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.