X0306 4 2014-02-22 0 0001163348 Allied World Assurance Co Holdings, AG AWH 0001473976 D'Orazio Frank ALLIED WORLD ASSURANCE CO. HOLDINGS AG LINDENSTRASSE 8 BAAR/ZUG V8 CH-6340 SWITZERLAND 0 1 0 0 Pres. Bda & Int'l Ins., AWAC Common Shares 2014-02-22 4 M 0 780 0.00 A 64903 D Common Shares 2014-02-22 4 M 0 352 0.00 A 65255 D Common Shares 2014-02-22 4 M 0 875 0.00 A 66130 D Common Shares 2014-02-22 4 D 0 1150 99.8969 D 64980 D Restricted Stock Units 2014-02-22 4 M 0 780 D Common Shares 780 6881 D Restricted Stock Units 2014-02-22 4 M 0 352 D Common Shares 352 6529 D Restricted Stock Units 2014-02-22 4 M 0 875 D Common Shares 875 5654 D On February 22, 2012, the reporting person was granted 3,120 Restricted Stock Units for no monetary consideration. The Restricted Stock Units convert into (i) 624 common shares and (ii) cash equal to the market value of 2,496 common shares (measured at the date of vesting) of such Restricted Stock Units. On February 22, 2011, the reporting person was granted 1,410 Restricted Stock Units for no monetary consideration. The Restricted Stock Units convert into (i) 705 common shares and (ii) cash equal to the market value of 705 common shares (measured at the date of vesting) upon the vesting of such Restricted Stock Units. On February 22, 2010, the reporting person was granted 3,500 Restricted Stock Units for no monetary consideration. The Restricted Stock Units convert into (i) 2,100 common shares and (ii) cash equal to the market value of 1,400 common shares (measured at the date of vesting) upon the vesting of such Restricted Stock Units. The fair market value of the cash portion was determined using the daily volume-weighted average sales price of the common shares for the five consecutive trading days prior to February 22, 2014, which was on a Saturday. The Restricted Stock Units vest in four equal installments with the first installment vesting on February 22, 2013. Represents all Restricted Stock Units held by the reporting person that vest in whole or in part in cash. The Restricted Stock Units vest in four equal installments with the first installment vesting on February 22, 2012. The Restricted Stock Units vested in four equal installments with the first installment vesting on February 22, 2011. /s/ Wayne H. Datz, by Power of Attorney 2014-02-25