| Date | Event |
| 16-Nov-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Entry into a Material Definitive Agreement, Financial Statements and E |
| 16-Nov-09 | Price hit new 52-week high ($61.25) |
| 11-Nov-09 | Price hit new 52-week high ($60.69) |
| 21-Oct-09 | Ex-Date for dividend payment of $0.18 |
| 16-Oct-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 10-K, Annual Report |
| 9-Oct-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 7-Oct-09 | Costco Wholesale Corporation Earnings and September Sales Release Call scheduled for 11:00 am ET today |
| 2-Oct-09 | Costco upgraded by Robert W. Baird |
| 12-Aug-09 | Ex-Date for dividend payment of $0.18 |
| 28-Jul-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 12-Jun-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 10-Q, Quarterly Report |
| 28-May-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements an |
| 30-Apr-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Amendments to Articles of Inc. or Bylaws; Change in Fiscal Year, Other |
| 18-Mar-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 10-Q, Quarterly Report |
| 6-Mar-09 | Price hit new 52-week low ($38.17) |
| 5-Mar-09 | Price hit new 52-week low ($39.26) |
| 4-Mar-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements an |
| 4-Mar-09 | Price hit new 52-week low ($40.15) |
| 29-Jan-09 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 19-Dec-08 | COSTCO WHOLESALE CORP /NEW Files SEC form 10-Q, Quarterly Report |
| 11-Dec-08 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements an |
| 9-Dec-08 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and Ex |
| 20-Nov-08 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Entry into a Material Definitive Agreement, Financial Statements and E |
| 31-Oct-08 | COSTCO WHOLESALE CORP /NEW Files SEC form 8-K, Other Events, Financial Statements and Exhibits |