X0202 4 2007-05-10 0 0000947484 ARCH CAPITAL GROUP LTD. ACGL 0001114751 INGREY PAUL B WESSEX HOUSE, 4TH FLOOR 45 REID STREET HAMILTON D0 HM 12 BERMUDA 1 0 0 0 Chairman - Board of Directors Common Shares, $.01 par value per share 2007-05-10 4 S 0 100 71.15 D 244465 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 300 71.21 D 244165 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 300 71.22 D 243865 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 100 71.23 D 243765 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 197 71.24 D 243568 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 3 71.25 D 243565 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 100 71.26 D 243465 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 100 71.29 D 243365 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 250 71.3 D 243115 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 250 71.31 D 242865 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 200 71.33 D 242665 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 200 71.34 D 242465 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 1100 71.35 D 241365 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 800 71.36 D 240565 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 800 71.37 D 239765 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 1100 71.38 D 238665 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 175 71.39 D 238490 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 400 71.41 D 238090 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 870 71.42 D 237220 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 181 71.43 D 237039 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 455 71.44 D 236584 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 800 71.45 D 235784 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 400 71.46 D 235384 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 300 71.47 D 235084 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 319 71.48 D 234765 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 400 71.49 D 234365 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 200 71.50 D 234165 D Common Shares, $.01 par value per share 2007-05-10 4 S 0 600 71.51 D 233565 D The sale of shares was effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person on February 14, 2007. /s/ Louis T. Petrillo Attorney in Fact 2007-05-14