Costco Wholesale stock ends the day lower at the close before earnings
Published on 09/21/2026 at 22:26 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Costco Wholesale stock closed on the Nasdaq on September 21, 2026 at approximately USD 901, marking a decline of about 2 percent versus the prior close as investors positioned ahead of this week’s earnings release. Compared with the broader S&P 500, which slipped less than 1 percent on the day, the warehouse retailer underperformed the market in Monday’s session.
September 21, 2026 in numbers
Costco Wholesale Corp. (ISIN US22160K1051, Nasdaq: COST) ended the regular session with the shares trading near USD 901 after opening above USD 910 and moving in a range broadly between USD 900 and USD 917 on the Nasdaq on September 21, 2026. Per exchange data compiled by MarketWatch, the stock’s close near USD 901.35 represented a drop of roughly 1.9 percent on the day, with intraday volume of about 2.2 million shares against an average volume of around 2.17 million, indicating slightly heavier trading activity than usual on the U.S. venue.
That closing level left Costco’s stock sitting closer to the lower end of its 52?week range between about USD 844 and USD 1,096 in U.S. trading, underscoring how far the shares have retreated from their early?year highs. While the S&P 500 declined less than half a percent, the consumer?defensive retailer’s bigger drop highlighted a degree of stock?specific caution ahead of fresh guidance. The shares also lagged key U.S. peers such as Walmart, whose stock fell less than 1 percent on the day on its New York listing.
After the bell and Thursday’s earnings
After the close on September 21, 2026, attention shifted to the after?hours session and to Costco’s upcoming fiscal fourth?quarter results. According to an earnings calendar overview from Investing.com, Costco is scheduled to report its fourth?quarter earnings after the market closes on September 24, 2026, with analysts expecting earnings per share of roughly USD 6.53 and quarterly revenue near USD 94.9 billion. A separate weekly preview from Yahoo Finance likewise highlighted Costco’s Thursday after?the?bell report as one of the key events for U.S. markets, noting that investors will be watching any commentary on membership trends and the possibility of another special dividend. With the extended trading session on September 21, 2026 running until 8:00 p.m. ET, the stock’s regular?session close around USD 901 on the Nasdaq remains the main reference point before those earnings catalysts later in the week.
