X0306 4 2013-09-20 0 0000909832 COSTCO WHOLESALE CORP /NEW COST 0001487207 McKay John D 999 LAKE DRIVE ISSAQUAH WA 98027 0 1 0 0 Executive Vice President Common Stock 2013-09-20 4 A 0 25000 A 91409 D Common Stock 2013-09-20 4 F 0 2547 117.94 D 88862 D Grant was initially made in October 2012 subject to performance conditions concerning fiscal 2013, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The shares of restricted stock subject to performance conditions vest ratably over a four year period from satisfaction based on continued employment with the Company. In addition, under the Stock Incentive Plan, long term employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service. Not applicable. Grant of Restricted Stock Units. Deanna K. Nakashima, attorney-in-fact 2013-09-23