Key Highlights

• Costco Earnings on May 28 place COST among the largest Nasdaq calendar events by market Capitalization.
• Investors are closely tracking membership growth, comparable sales, and Warehouse traffic trends.
• EPS comparison uncertainty between $4.28 and $4.02 may affect year-over-year earnings analysis.

Costco Wholesale Corporation (NASDAQ:COST) is set to release its quarterly results on Thursday, May 28, 2026, placing one of the most closely watched names in U.S. retail at the top of the day's Nasdaq earnings calendar. With a market capitalization near $444.95 billion, COST is among the largest single events on this week's earnings calendar, and the report is expected to draw broad attention from investors, analysts, and consumer-sector watchers.

Beyond the headline EPS comparison, the market may focus on whether Costco's warehouse traffic, average ticket, and membership Economics continue to track at the pace seen over the past several years. The company's results often serve as a real-time data point on the health of the U.S. consumer, and Costco earnings tend to ripple into broader stock market news coverage. This article walks through what is publicly known ahead of the print, the structure of the comparison investors will use, and the indicators most often cited in Costco earnings discussions.

Company Background

Costco Wholesale operates a membership-based warehouse club model and is frequently cited as the world's third-largest retailer by Revenue. The company runs more than 875 warehouses across the United States, Canada, Mexico, the United Kingdom, Japan, South Korea, Taiwan, Australia, Spain, France, China, Iceland, New Zealand, and Sweden. Membership is the foundation of the Business model: customers pay an annual fee for the right to shop at Costco's warehouses and online properties, and Costco uses its scale to negotiate low prices on a limited assortment of goods.

The membership base has grown to approximately 140 million cardholders, supported by Gold Star, Business, and Executive tiers. Executive membership penetration is closely tracked because Executive members typically generate a disproportionate share of sales and renewal income. Renewal rates, which Costco discloses each quarter, have historically been a hallmark of the business and are watched by investors as a measure of customer loyalty and pricing power.

The merchandise mix spans food and sundries, fresh foods, non-food categories such as apparel and electronics, and ancillary businesses including pharmacy, optical, hearing aids, tire service, and gas stations. Costco also operates a growing E-commerce platform and has expanded delivery partnerships over time. The interplay among these categories shapes Margin and traffic trends each quarter.

Main News Event

Costco is expected to publish its quarterly earnings report on Thursday, May 28, 2026. The release places COST near the top of the day's Nasdaq earnings calendar by market capitalization. As is typical, the company is expected to follow the report with a conference call in which management discusses comparable sales, traffic, average ticket, membership trends, and category performance.

Because Costco discloses monthly net sales figures, investors and analysts already have a partial picture of top-line trends entering the quarter. The earnings report nonetheless remains the focal event because it adds gross margin commentary, membership fee income detail, SG&A trends, and updates on warehouse openings and Capital spending. These additional disclosures are what drive the post-report move in COST stock and the broader read-through to peer retailers.

Earnings Details

According to Nasdaq earnings calendar data, Costco last reported quarterly results on May 29, 2025. The Nasdaq calendar lists last year's reported EPS at $4.28. Investors should be aware of a public discrepancy: other reporting sources cite $4.02 as Costco's comparable fiscal Q3 2025 EPS. The gap may reflect differences between GAAP and adjusted measures, the treatment of discrete items, or data-feed conventions. Because the headline year-over-year EPS comparison hinges on which figure is used, investors should verify the comparable EPS directly with Costco's official press release and 10-Q filing before drawing conclusions about year-over-year growth.

Costco's market capitalization stood at roughly $444.95 billion as reflected on the Nasdaq calendar entry for this report. That valuation makes COST one of the single largest names scheduled to release earnings on May 28, 2026, and explains why the print is positioned as a marquee item on the day's earnings calendar.

The scheduled report date is Thursday, May 28, 2026. Investors typically follow the press release with the supplemental investor materials and the management conference call to obtain the full picture of the quarter.

Why Investors Are Watching

Costco earnings are watched closely because the company's results offer a real-time read on U.S. and international consumer behavior at scale. The membership model provides a Recurring Revenue stream that many investors view as defensive, while comparable sales and traffic provide signals about discretionary spending, food Inflation, and big-ticket categories such as appliances and electronics.

Membership renewal rates and the Executive member share are watched as indicators of the durability of Costco's pricing advantage. Average ticket and traffic trends help clarify whether shoppers are visiting more frequently, spending more per trip, or trading among categories. The food versus non-food mix is important because shifts toward food tend to compress gross margin but support traffic, while a recovery in non-food can lift margin.

E-commerce performance is also in focus. Costco has expanded its digital channels, same-day delivery, and big-and-bulky logistics. Investors may want to see how digital sales contributed to the quarter and how the e-commerce mix is evolving.

What the Numbers Mean

If Costco's reported EPS is compared against the Nasdaq calendar figure of $4.28, the headline year-over-year growth rate will look different than if the $4.02 figure cited elsewhere is used as the base. This is a meaningful issue for stock market news headlines that lead with a single percentage. Investors should be aware that the reported figure may be expressed on either a GAAP or adjusted basis, that discrete items can materially affect the comparable EPS, and that the company's own press release is the authoritative source.

Beyond EPS, Market Participants typically examine revenue growth, comparable sales excluding fuel and foreign exchange, gross margin excluding gasoline, membership fee income, and SG&A Leverage. Each of these line items contributes to the broader picture of operating discipline.

With a market capitalization near $444.95 billion, even modest percentage moves in COST can translate into large absolute changes in Market Value. That magnitude is one reason Costco earnings tend to influence the day's broader stock market news tone, particularly across consumer staples and large-cap growth-style indices.

Broader Market Context

The May 28, 2026 Nasdaq earnings calendar includes a notable mix of large-cap names alongside Costco. Investors often look at clusters of earnings prints to form a view on consumer Demand, enterprise spending, and the Credit cycle. Costco's report lands during a stretch in which retailers, banks, and technology hardware names are reporting in close succession, providing a broad cross-section of the economy.

Within consumer staples, Costco is frequently compared to other warehouse clubs and to large-format grocers and mass merchandisers. The company's membership model differentiates it from peers, but comparable sales and traffic remain useful cross-checks against industry data such as credit and debit card spending surveys, foot-traffic measurements, and consumer sentiment indicators.

On the macro side, themes that often surface in Costco earnings discussions include food inflation, fuel prices, foreign exchange exposure from international warehouses, and the impact of currency on reported revenue. These themes are common to many large multinational retailers and are often discussed on the company's conference call.

Risks and Considerations

Costco's scale and membership model do not eliminate risk. Comparable sales growth can decelerate, particularly in non-food categories that are more discretionary. Gross margin can compress when food inflation accelerates or when the mix shifts toward lower-margin categories. Membership fee income growth depends on continued net new member additions and the cadence of membership fee adjustments.

International operations introduce foreign exchange variability, and warehouse expansion plans involve capital spending that can pressure free Cash Flow in periods of accelerated openings. Like other large retailers, Costco is exposed to Supply chain costs, labor expenses, and consumer credit conditions, all of which can affect quarterly results.

Investors should also consider valuation. COST has historically traded at a premium price-to-earnings multiple relative to other large retailers, which implies a higher bar for meeting market expectations. Any divergence between reported numbers and consensus may produce outsized share-price moves.

What Investors Should Watch Next

After the May 28, 2026 report, investors will likely focus on several items in the press release, supplemental materials, and conference call. These include comparable sales excluding fuel and foreign exchange, membership fee income growth, paid household and cardholder counts, renewal rates in the United States and Canada and worldwide, Executive membership share of paid members, gross margin excluding gasoline, SG&A leverage, e-commerce growth, and the pace of new warehouse openings.

Management commentary on category-level trends, including food, fresh, non-food, and ancillary businesses, is also closely watched. Capital spending guidance for the remainder of the fiscal year and any commentary on special dividends or share repurchases can further influence the stock's post-report reaction.

Conclusion

Costco's quarterly earnings on May 28, 2026 anchor the Nasdaq earnings calendar with one of the day's largest market capitalizations near $444.95 billion. The prior-year EPS reference of $4.28 listed on the Nasdaq calendar carries an important caveat: other sources cite $4.02 for the same fiscal Q3 2025 period, and investors should rely on Costco's official press release for the authoritative comparable figure. Membership economics, comparable sales, average ticket, and category mix are likely to remain at the center of the post-report discussion as investors interpret Costco earnings within broader stock market news.