Costco stock today: COST at $862 as New Year’s Day shuts markets; SEC insider sale filing in focus
NEW YORK, January 1, 2026, 10:52 ET — Market closed. Costco Wholesale Corporation (COST.O) shares last closed down 0.4% at $862.34, after trading between $861.42 and $867.76 in the year’s final session on Wednesday. U.S. stock markets are closed on