Costco remains a high-quality defensive compounder, with 6.7% adjusted comps, 19.8% digital growth, net cash, and a credible five-year upside case despite premium valuation risk.
Overview
Costco is a global membership warehouse operator with 939 locations at FY2026 year-end, generating merchandise revenue from a limited assortment of roughly 4,000 SKUs and recurring, ultra-high-margin membership fees. Its 14%–15% merchandise-margin ceiling, Kirkland private label, purchasing scale, and ancillary services create a trusted value proposition that supports 89.8% worldwide renewal and above-92% North American renewal. **FY2026 Q4 demonstrated continued operating momentum:** net sales rose 11.2% year over year to $93.873 billion, total revenue reached $95.723 billion, net income grew 14.9% to $2.998 billion, and diluted EPS increased to $6.75; core EPS excluding a $0.15 IEEPA tariff-refund benefit was $6.60. Adjusted comparable sales grew 6.7% and digital comps 19.8%. For the full year, revenue was $302.880 billion, EPS $20.76, operating cash flow $15.825 billion, and free cash flow $9.390 billion. **The trade-off is valuation:** at roughly $900, Costco trades around 43.6x trailing and 40.1x forward earnings, versus 15x–25x for traditional retail. International openings, digital delivery, membership pricing, and potential cash returns are catalysts, but rates and multiple compression remain material risks.