Is Costco Stock a Buy, Hold or Sell After May Sales Results?

Costco's May sales increased 6.8% to $20.97 billion, with comparable sales up 4.3% and e-commerce surging 11.6%, demonstrating consistent revenue performance and strong customer retention with a 92.7% renewal rate in the U.S. and Canada. The company's forward P/E of 51.44 is significantly higher than its peers and its own median, suggesting a premium valuation that reflects investor confidence but leaves less room for error despite analysts raising estimates for the current and next fiscal years.

Analysis

Costco Wholesale Corporation (COST) reported robust May sales results, with net sales climbing 6.8% year-over-year to $20.97 billion, underscoring sustained consumer demand. Total comparable sales increased by 4.3%, driven by gains across the U.S. (4.1%), Canada (3.3%), and Other International markets (6.6%), and notably, e-commerce comparable sales surged 11.6%. This performance continues a trend of strong sales, following improvements of 7% in April and 8.6% in March. Key to Costco's success is its membership model, evidenced by a 92.7% renewal rate in the U.S. and Canada, and a 6.8% year-over-year increase in paid household members to 79.6 million by Q3 fiscal 2025, with executive memberships growing 9% to 37.6 million and contributing 73.1% of global sales. The company is actively enhancing its omnichannel presence, with Q3 e-commerce sales up 14.8% and Costco Logistics deliveries increasing 31%, further supported by initiatives like the Buy Now Pay Later program with Affirm. Expansion efforts are ongoing, with 27 total warehouse openings planned for fiscal 2025, aiming for a global count of 914. Margin expansion is supported by cost controls and the growing penetration of its Kirkland Signature brand, which outpaced overall company growth in Q3. Analyst sentiment reflects this strength, with consensus estimates for the current fiscal year rising to $18.04 (12% YoY growth) and for the next fiscal year to $19.90 (10.3% YoY growth). However, Costco's stock trades at a forward P/E of 51.44, significantly above its industry peers (DG at 19.07, DLTR at 16.99, TGT at 12.88), its own median (50.77), and the S&P 500 (22.02), indicating a premium valuation that, while reflecting strong investor confidence and consistent performance, suggests much of the future growth may already be priced in, leaving less room for error.

Key Decisions for Investors

• Long-term investors may find Costco's consistent growth, strong membership model, and operational resilience appealing, justifying its status as a core holding despite the premium valuation.
• Investors should closely monitor the company's ability to sustain its sales momentum and margin expansion, as the high valuation implies significant expectations that need to be met.
• Given the stretched valuation, value-conscious investors or those with shorter time horizons might consider waiting for a potential pullback or a more attractive entry point before initiating or adding to positions, aligning with the current Zacks Rank #3 (Hold) assessment.
• Continued strong performance in e-commerce comparable sales and successful execution of international warehouse expansion plans are critical indicators to watch for justifying the current market premium.