Costco Stock Faces Volatility Ahead of September Earnings Report

Costco Wholesale Corporation is scheduled to report its fourth-quarter 2026 earnings on September 26. Analysts identify the upcoming report as a primary short-term catalyst for the stock, which currently trades at $961 per share. Depending on the results, the price is expected to move toward either $1,000 or $900.

While the company's stock has risen 11.5% in 2026, it currently trails the S&P 500's 13.7% return for the same period. The stock reached an all-time high of $1,094.32 in May 2026. Long-term performance remains strong, with a five-year total return of 115% and a ten-year gain of 573%.

Financial analysis shows the company is trading at a high valuation, with a forward price-to-earnings multiple between 42 and 44, significantly exceeding the S&P 500 consumer staples average of approximately 26. This premium is supported by strong fiscal 2026 performance, including second-quarter net sales of $68.24 billion and third-quarter net sales of $69.15 billion.

Growth is driven by an expanding warehouse base and a durable membership model, evidenced by a 92.2% membership renewal rate across North America. The company maintains a return on equity near 29% and strong cash generation, which supports dividends, share buybacks, and digital investments.