X0303 4 2009-06-29 0 0001163348 ALLIED WORLD ASSURANCE CO HOLDINGS LTD AWH 0001368325 Redmond John T ALLIED WORLD ASSURANCE CO HOLDINGS, LTD 27 RICHMOND ROAD PEMBROKE D0 HM 08 BERMUDA 0 1 0 0 Pres, AWAC (Eur) & AWAC (Rein) Common Shares 2009-06-29 4 M 0 1667 23.61 A 37155 D Common Shares 2009-06-29 4 S 0 1667 41.00 D 35488 D Employee Stock Options (right to buy) 23.61 2009-06-29 4 M 0 1667 0.00 D 2004-01-02 2013-01-02 Common Shares 1667 0 D The exercise of Employee Stock Options and sale of Common Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 27, 2009. These securities vested in four equal annual installments with the first installment vesting on the date shown. /s/ Wesley D. Dupont, by Power of Attorney 2009-06-30