X0306 4 2013-05-09 0 0000947484 ARCH CAPITAL GROUP LTD. ACGL 0001286007 GRANDISSON MARC WESSEX HOUSE, 5TH FLOOR, 45 REID STREET HAMILTON D0 HM 12 BERMUDA 0 1 0 0 Reinsur. Group Chairman & CEO Common Shares, $.0033 par value per share 2013-05-09 4 A 0 17700 A 494524 D Common Shares, $.0033 par value per share 660 I By spouse Stock Appreciation Right 53.53 2013-05-09 4 A 0 17700 0 A 2023-05-09 Common Shares, $.0033 par value per share 17700 17700 D Represents restricted shares that vest in three equal annual installments on May 9th in each of 2014, 2015 and 2016, subject to the applicable award agreement. The stock appreciation right will become exercisable in three equal annual installments, with the first installment becoming exercisable on May 9, 2014 and the next two installments on May 9, 2015 and May 9, 2016, subject to the applicable award agreement. /s/ Louis T. Petrillo, Attorney in fact 2013-05-13