Costco's quarter wasn't perfect, but most of the metrics that matter to investors were solid

Costco reported stronger-than-expected Q4 fiscal 2025 results, with revenue of $86.16 billion (+8% YoY) and adjusted EPS of $5.87 (+11% YoY) both exceeding analyst estimates, driven by robust 14% membership fee growth and margin expansion from supply chain improvements. While adjusted comparable sales growth decelerated to 6.4% and membership renewal rates dipped slightly, total paid memberships still increased 6.3% year-over-year. Despite the earnings beat, shares traded slightly lower after-hours, reflecting market concerns over its high valuation, even as the company plans an accelerated pace of 35 new warehouse openings in fiscal 2026.

Analysis

Costco reported solid fiscal Q4 2025 results, with revenue growing 8% year-over-year to $86.16 billion and adjusted EPS rising 11% to $5.87, both surpassing consensus estimates. The performance was underpinned by an acceleration in membership fee growth to 14%, fueled by a prior-year price hike and member upgrades, alongside a 13-basis-point improvement in gross margin to 11.13%. This margin expansion, driven by supply chain efficiencies and increased Kirkland Signature penetration, occurred despite headwinds from gas deflation and a LIFO charge. However, the results were not uniformly positive. Adjusted comparable sales growth decelerated to 6.4%, and key membership metrics showed signs of softness; total paid memberships of 81 million missed the 81.5 million consensus, and renewal rates declined for the second consecutive quarter to 89.8% worldwide. Management attributes the renewal dip to a growing mix of online signups, which renew at a lower rate, and expects this trend to persist. The muted after-hours stock performance suggests investors are weighing these strong operational results against the noted deceleration and a high valuation, despite the company's plans for accelerated warehouse expansion in fiscal 2026.

Key Decisions for Investors

• Given the stock's high price-to-earnings multiple and the muted market reaction to a strong earnings beat, investors should consider that the positive results may be fully priced in, warranting caution before initiating new positions.
• It is critical to monitor membership renewal rates and comparable sales figures in subsequent quarters, as the current downward trend in renewals and decelerating comps represent the primary risks to Costco's highly predictable profit model.
• For long-term holders, the quarter's results reaffirm core strengths, including margin discipline through supply chain management, the defensive value of the Kirkland Signature brand, and an accelerated pace of global store openings, which support a continued positive outlook.