Costco Stock Retreats After Hours on Decelerating Comparable Sales
Costco reported net sales of $29.24 billion for the five weeks ended July 5, 2026, up 10.6% year-over-year. However, comparable sales growth slowed after a strong May, causing the stock to retreat in after-hours trading.
Key Numbers
Costco Wholesale Corporation (NASDAQ: COST) reported net sales of $29.24 billion for the five-week period ended July 5, 2026, a 10.6% increase from $26.44 billion in the same period last year. Despite the overall growth, comparable sales decelerated following a strong May performance, leading to a decline in the stock during after-hours trading.
Key Financial Results
| Metric | Value |
|---|---|
| Net Sales | $29.24 billion |
| Prior Year Net Sales | $26.44 billion |
| Year-over-Year Growth | 10.6% |
Highlights from the Report
Costco noted that comparable sales growth slowed compared to May, which had been a particularly strong month. No further details on the reasons for the deceleration were provided.
Future Guidance
The company did not issue any formal guidance for upcoming quarters.
Impact on the Stock
COST shares retreated in after-hours trading following the announcement, reflecting investor concerns over the slowing comparable sales trend.
What This Means for Investors
The deceleration in comparable sales growth signals potential headwinds for Costco's revenue momentum after a strong May. Investors should monitor upcoming monthly sales data to gauge the sustainability of growth.
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