Costco Wholesale Corporation ("Costco" or the "Company") (Nasdaq: COST) announced today its operating results for the third quarter (12 weeks) and the first thirty-six weeks of fiscal 2001, ended May 13, 2001. Net sales for the third quarter of fiscal 2001 increased 12% to $7.56 billion from $6.77 billion during the third quarter of fiscal 2000. On a comparable warehouse basis, that is warehouses open at least a year, net sales increased 5%.