Costco stock climbs on Mizuho’s $1,000 call as December sales report nears
New York, January 5, 2026, 18:59 EST — After-hours Costco Wholesale Corp (COST.O) shares were up $21.18, or about 2.5%, at $875.74 in after-hours trading on Monday after Mizuho upgraded the warehouse retailer and raised its price target to $1,000.