X0306 4 2015-02-20 0 0001163348 Allied World Assurance Co Holdings, AG AWH 0001091619 ALEXANDER STILES BARBARA ALLIED WORLD ASSURANCE CO. HOLDINGS, AG GUBELSTRASSE 24, PARK TOWER, 15TH FLOOR ZUG V8 6300 SWITZERLAND 1 0 0 0 Common Shares 2015-02-20 4 G 0 1776 0.00 D 8311 D Common Shares 2015-02-20 4 G 0 1776 0.00 A 15510 I By Trust Represents shares held by the reporting person as co-trustee for the Stiles Family Trust dated November 20, 2007. /s/ Wayne H. Datz, by Power of Attorney 2015-02-24