Costco (COST) Stock Jumps as Online Sales Growth Reaches 18% in December

TLDR December 2025 net sales reached $29.86 billion, up 8.5% from December 2024 Comparable store sales grew 7% companywide and 6.3% in the U.S. market E-commerce sales jumped 18.3% as online shopping accelerated Traffic rose 2.7% while average transaction value increased 4.2% COST stock gained 3% on Thursday following the monthly sales release Costco reported [...]

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