Costco Wholesale Corporation (COST) ended the September 29, 2026 session at $922.93 per share, essentially flat with no measurable change over the prior 24 hours. The warehouse retail giant's market capitalization stood at $409.03 billion as trading closed.
Over the trailing seven days, Costco shares gained 2.72%, reflecting a period of positive momentum heading into the final stretch of the month. That weekly performance offered a counterpoint to a more subdued broader trend.
Looking back over the past 30 days, however, COST has declined 2.43%, indicating that the recent weekly recovery has only partially offset losses accumulated over the longer near-term window.
The stock's price action on the day suggests a pause after the recent weekly advance, with buyers and sellers reaching a near-equilibrium at the close.
