TradingKey – Costco Wholesale (COST) closed at $922.77 last Friday, an increase of 2.93% from the previous close, on the first trading day after the release of the company’s earnings report for the 16-week quarter ended August 30, 2026. Based on the report, sales trends and renewals remained healthy, and the company continued to see strong progress in its online business. The report and earnings call also addressed membership growth and shopping frequency, which remain key drivers as one-time tariff-refund benefits and the prior membership-fee increase roll through comparisons.