X0306 4 2022-03-14 0 0000947484 ARCH CAPITAL GROUP LTD. ACGL 0001741826 Morin Francois C/O ARCH CAPITAL GROUP LTD. WATERLOO HOUSE, 100 PITTS BAY ROAD PEMBROKE D0 HM 08 BERMUDA 0 1 0 0 EVP and CFO Common Shares, $.0011 par value per share 2022-03-14 4 S 0 12351 46.3584 D 202259 D Represents a weighted average sale price; the sales prices ranged from $46.32 to $46.41. Upon request, the full sale information regarding the number of shares sold at each price increment will be provided to the Commission or a security holder of the issuer. /s/ Francois Morin 2022-03-15