Costco is trading at historically elevated valuation multiples that may concern growth investors. Its price-to-sales ratio stands at 1.5x, compared with a five-year average of 1.2x. The current price-to-earnings ratio is 51x versus a longer-term average of 44x, and the price-to-book ratio of 14.1x exceeds its five-year norm of 12.4x. Meanwhile, the dividend yield sits at just 0.5%, near its lowest point over the past decade. These metrics suggest that investors are affording Costco a premium seldom seen in its history, raising the bar for future returns.

Over the past 20 years, Costco’s stock has delivered extraordinary compounded growth. A hypothetical $1,000 investment two decades ago, with dividends reinvested, would now be worth approximately $27,600—more than triple the $7,900 that the S&P 500 would have returned over the same period. This performance reflects consistent high-single-digit same-warehouse sales growth, resilient membership renewal rates above 90%, and a business model that thrives even in economic downturns by emphasizing low prices and bulk sales.

Costco continues to fuel its long-term growth through a disciplined warehouse rollout and innovative site utilization. In the most recent fiscal first quarter, sales climbed 8.2% year over year, driven by the addition of new clubs in underpenetrated international markets and faster ramp-up of recently opened locations. The company is also repurposing vacant retail spaces into warehouse clubs at a lower cost per site, accelerating breakeven times. These strategic initiatives, combined with membership fee annuity streams, underpin Costco’s ability to sustain high returns on invested capital over the next decade.