X0306 4 2020-08-03 0 0000947484 ARCH CAPITAL GROUP LTD. ACGL 0001304230 Vollaro John D WATERLOO HOUSE, GROUND FLOOR 100 PITTS BAY ROAD PEMBROKE D0 HM 08 BERMUDA 1 0 0 0 Common Shares, $.0011 par value per share 2020-08-03 5 G 0 E 163000 D 299882 I by Trust Common Shares, $.0011 par value per share 2020-08-03 5 G 0 E 163000 A 163000 I by Trust Such common shares are held by a revocable trust for which the reporting person serves as trustee. Such common shares were transferred to an irrevocable trust for which the reporting person's spouse is a co-trustee. /s/ John Vollaro 2020-10-29