Costco Wholesale Corporation

Costco Wholesale Corporation is an American membership-only warehouse club retailer that operates 928 big-box locations across 15 countries, serving 148.5 million cardholders with a curated assortment of roughly 4,000 stock-keeping units per warehouse at prices its competitors cannot consistently match. In fiscal 2025, the company generated $275.2 billion in total revenue, $8.1 billion in net income, and $13.3 billion in cash from operations — figures that make it the third-largest retailer in the world by revenue and, by a wide margin, the most profitable warehouse club operator ever built.

This is a story about a business model so internally consistent that it borders on structural inevitability. Costco charges a membership fee — $5.3 billion of near-pure profit in FY2025 — which effectively covers every dollar of selling, general, and administrative expense the company incurs. Freed from the need to earn a retail margin, Costco can price merchandise at or near cost, which drives membership sign-ups and renewals at rates north of 90% in its home markets, which in turn produces the purchasing scale that lets it negotiate prices no competitor can match. The question this file turns on is not whether the model works — it demonstrably does — but what multiple that model deserves when the stock trades at roughly 49 times trailing earnings and the easy margin expansion of the last three years may be largely behind it.

The analysis that follows is organized around the debates that matter for a buy-side investor holding or considering a position at these levels. Costco is an extraordinary business; the work is in deciding whether the current price adequately compensates for the growth rate the business can realistically sustain, the international bets that will take a decade to play out, and the possibility that the market's patience with a 49× consumer staple is finite.