X0202 4 2007-08-07 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 2007-08-07 4 S 0 400 68.4 D 229165 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 100 68.41 D 229065 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 100 68.42 D 228965 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 1200 68.44 D 227765 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 300 68.45 D 227465 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 500 68.46 D 226965 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 300 68.48 D 226665 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 400 68.49 D 226265 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 500 68.5 D 225765 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 202 68.51 D 225563 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 198 68.52 D 225365 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 100 68.53 D 225265 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 198 68.54 D 225067 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 400 68.56 D 224667 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 100 68.57 D 224567 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 900 68.58 D 223667 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 302 68.59 D 223365 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 500 68.6 D 222865 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 400 68.61 D 222465 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 200 68.65 D 222265 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 200 68.68 D 222065 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 100 68.73 D 221965 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 1604 68.74 D 220361 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 200 68.75 D 220161 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 200 68.76 D 219961 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 100 68.82 D 219861 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 300 68.86 D 219561 D Common Shares, $.01 par value per share 2007-08-07 4 S 0 100 68.87 D 219461 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 2007-08-08