X0202 4 2007-05-08 0 0000947484 ARCH CAPITAL GROUP LTD. ACGL 0001114751 INGREY PAUL B WESSEX HOUSE, 4TH FLOOR 45 REID STREET HAMILTON D0 HM 12 BERMUDA 1 1 0 0 Chairman-Board of Directors Common Shares, $.01 par value per share 2007-05-08 4 S 0 200 70.61 D 274365 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 200 70.70 D 274165 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 200 70.95 D 273965 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71 D 273865 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.1 D 273765 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 300 71.13 D 273465 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 200 71.14 D 273265 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 200 71.15 D 273065 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 500 71.16 D 272565 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 300 71.17 D 272265 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.18 D 272165 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 200 71.2 D 271965 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 690 71.21 D 271275 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.22 D 271175 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 200 71.24 D 270975 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.25 D 270875 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 10 71.28 D 270865 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.30 D 270765 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 400 71.42 D 270365 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.43 D 270265 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 101 71.47 D 270164 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 99 71.48 D 270065 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.49 D 269965 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 300 71.5 D 269665 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.51 D 269565 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 300 71.5125 D 269265 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 400 71.52 D 268865 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 400 71.53 D 268465 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 200 71.54 D 268265 D Common Shares, $.01 par value per share 2007-05-08 4 S 0 100 71.5425 D 268165 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 2007-05-09