X0306 4 2022-02-25 0 0000947484 ARCH CAPITAL GROUP LTD. ACGL 0001345284 Papadopoulo Nicolas C/O ARCH CAPITAL GROUP LTD 100 PITTS BAY ROAD, WATERLOO HOUSE PEMBROKE D0 HM 08 BERMUDA 0 0 0 1 President & CUO Common Shares, $.0011 par value per share 2022-02-25 4 A 0 46162 0 A 791706 D Common Shares, $.0011 par value per share 2022-02-25 4 A 0 10097 A 801803 D Stock Option (right to buy) 47.54 2022-02-25 4 A 0 45695 0 A 2032-02-25 Common Shares, $.0011 par value per share 45695 45695 D Amount includes 765 common shares acquired on May 31, 2021 under the Arch Capital Group Ltd. Employee Share Purchase Plan. Represents restricted shares that vest in three equal annual installments, commencing February 25, 2023, and the next two installments on February 25, 2024 and February 25, 2025, subject to the applicable award agreement. The stock option becomes exercisable in three equal annual installments commencing February 25, 2023, and the next two installments on February 25, 2024 and February 25, 2025, subject to the applicable award agreement. /s/ Nicolas Papadopoulo 2022-02-28