X0202 4 2007-08-08 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 2007-08-08 4 S 0 3300 65.9 D 211265 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 65.91 D 211065 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 65.95 D 210865 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 66.05 D 210665 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 66.08 D 210465 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 400 66.1 D 210065 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 66.24 D 209865 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 300 66.25 D 209565 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 66.26 D 209365 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 100 66.33 D 209265 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 300 66.47 D 208965 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 100 66.49 D 208865 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 300 66.61 D 208565 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 100 66.63 D 208465 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 66.64 D 208265 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 66.68 D 208065 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 600 66.69 D 207465 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 400 66.74 D 207065 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 100 66.77 D 206965 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 100 66.8 D 206865 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 100 66.81 D 206765 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 66.92 D 206565 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 66.93 D 206365 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 200 67 D 206165 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 100 67.09 D 206065 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 300 67.12 D 205765 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 300 67.35 D 205465 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 400 67.36 D 205065 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 400 67.37 D 204665 D Common Shares, $.01 par value per share 2007-08-08 4 S 0 300 67.39 D 204365 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 2007-08-09