Costco Wholesale Corporation (COST) closed at $924.66 on September 30, 2026, advancing 0.19% over the prior 24 hours. The marginal single-session gain kept the warehouse retail giant in positive territory heading into the end of the trading day.
Zooming out to the past week, COST has performed more strongly, rising 2.83% over the seven-day period. The broader weekly trend suggests sustained buying interest in the stock, even as day-to-day movement remained subdued.
The 30-day picture tells a more cautious story. Costco shares declined 2.25% over the past month, indicating the stock faced some headwinds during that stretch before recovering ground more recently.
Costco's market capitalization stood at $409.1 billion as of the close, reflecting the company's continued standing as one of the largest retailers by market value in the United States.
