X0303 4 2010-08-04 0001141719 ALTERRA CAPITAL HOLDINGS Ltd ALTE 0001188149 ZECH JAMES L C/O ALTERRA CAPITAL HOLDINGS LIMITED ALTERRA HOUSE, 2 FRONT STREET HAMILTON, BERMUDA D0 HM 11 BERMUDA 1 0 0 0 Common Shares 2010-08-04 4 A 0 4000 0 A 176564 D Common Shares 47135 I By Trust Common Shares 47135 I By Trust Common Shares 47134 I By Trust Common Shares 47134 I By Trust The Restricted Stock Award was granted pursuant to the Issuer's 2008 Stock Incentive Plan. Shares held in trust for the benefit of a family member. Bernard Asirifi, Attorney-in-Fact 2010-08-06