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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
909832	Costco Wholesale Corp W	COST	Retail-Variety Stores (5331)	911223280

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1184497	S David Petterson	999 Lake Drive Issaquah WA 98027		No	No	No	Yes

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2012-10-22	662	$95.00	34,347	No	4	F	Direct
Common Stock	Disposition	2012-10-22	662	$95.00	33,685	No	4	F	Direct
Common Stock	Disposition	2012-10-22	662	$95.00	33,023	No	4	F	Direct
Common Stock	Disposition	2012-10-22	886	$95.00	32,137	No	4	F	Direct
Common Stock	Acquisiton	2012-10-22	12,500	$0.00	44,637	No	4	A	Direct
Common Stock	Disposition	2012-10-24	1,838	$95.80	42,799	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	F	Direct
No	4	F	Direct
No	4	F	Direct
No	4	F	Direct
No	4	A	Direct
No	4	S	Direct

Footnotes

This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on NASDAQ on October 22, 2012.
Grant of Restricted Stock Units. Vests one-fifth on October 22, 2013 and one-fifth annually on October 22 for the following four years.
Not applicable. Grant of Restricted Stock Units.
The price shown is a weighted average sale price for shares sold in multiple transactions; the sale prices ranged from $95.7900 to $95.7978 per share. The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.