X0202 4 2007-05-09 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 1 Chairman of Board of Directors Common Shares, $.01 par value per share 2007-05-09 4 S 0 300 69.89 D 259265 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 70.4 D 259165 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 70.45 D 259065 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 70.6 D 258965 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 70.65 D 258865 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 80 70.81 D 258785 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 20 70.86 D 258765 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 70.92 D 258665 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 70.98 D 258565 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 71 D 258465 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 71.01 D 258365 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 300 71.05 D 258065 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 300 71.09 D 257765 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 205 71.1 D 257560 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 95 71.11 D 257465 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 200 71.12 D 257265 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 400 71.14 D 256865 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 600 71.15 D 256265 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 200 71.16 D 256065 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 850 71.17 D 255215 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 200 71.18 D 255015 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 800 71.19 D 254215 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 1050 71.2 D 253165 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 71.21 D 253065 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 600 71.22 D 252465 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 200 71.23 D 252265 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 100 71.24 D 252165 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 900 71.25 D 251265 D Common Shares, $.01 par value per share 2007-05-09 4 S 0 400 71.26 D 250865 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 2007-05-10