Costco Wholesale Corp /new,
Fiscal Year 2026 Q1.

We believe our gasoline business enhances traffic in our warehouses; it generally has a lower gross margin percentage and lower SG&A expense relative to our non-gasoline businesses. A higher penetration of gasoline sales will generally lower our gross margin percentage. Generally, rising gasoline prices benefit net sales growth which, given the higher sales base, negatively impacts our gross margin percentage but decreases our SG&A expenses as a percentage of net sales. A decline in gasoline prices has the inverse effect. We also achieve net sales growth by opening new warehouses. As our warehouse base grows and available and desirable sites become more difficult to secure, square footage growth becomes a comparatively less substantial component of growth. Negative aspects of such growth include lower initial operating profitability relative to existing warehouses and cannibalization of sales at existing warehouses when openings occur in existing markets. Our rate of square footage growth is generally higher in many of our foreign markets, due to the smaller base in those markets, and we expect that to continue. The membership format is integral to our business and profitability. This format is designed to reinforce member loyalty and provide continuing fee revenue. The extent to which we achieve growth in our 18 membership base, increase the penetration of Executive memberships, and sustain high renewal rates materially influences our profitability. Our renewal rate, which excludes affiliates of Business members, is a trailing calculation that captures renewals during the period seven to eighteen months prior to the reporting date. Our paid-membership growth rate may be adversely impacted when warehouse openings occur in existing markets as compared to new markets. Our worldwide renewal rate is adversely impacted by membership growth in newer international markets and a higher penetration of memberships sold online, including through digital membership promotions, which renew at a slightly lower rate on average. Our financial performance depends heavily on controlling costs. While we believe that we have achieved successes in this area, some significant costs are partially outside our control, particularly health care and utility expenses. With respect to the compensation of our employees, our philosophy is not to seek to minimize their wages and benefits. Rather, we believe that achieving our longer-term objectives of reducing employee turnover, increasing productivity and enhancing employee satisfaction requires maintaining compensation levels that are better than the industry average for much of our workforce. This may cause us, for example, to absorb costs that other employers might seek to pass through to their workforces. Because our business operates on very low margins, modest changes in various items in the consolidated statements of income, particularly merchandise costs and SG&A expenses, can have substantial impacts on net income. Our operating models are generally the same across our U.S., Canadian, and Other International operating segments (see Note 9 to the condensed consolidated financial statements included in Part I, Item 1, of this Report). Certain operations in the Other International segment have relatively higher rates of square footage growth, lower wage and benefit costs as a percentage of sales, less or no direct membership warehouse competition, or lack e-commerce or business delivery. In discussions of our consolidated operating results, we refer to the impact of changes in foreign currencies relative to the U.S. dollar, which are differences between the foreign-exchange rates we use to convert the financial results of our international operations from local currencies into U.S. dollars. This impact is calculated based on the difference between the current and prior period's exchange rates. The impact of changes in gasoline prices on net sales is calculated based on the difference between the current and prior period's average price per gallon. Results expressed excluding the impacts of foreign-exchange and gasoline prices are intended as supplemental information and are not a substitute for net sales presented in accordance with U.S. GAAP and should be reviewed in conjunction with results reported in accordance with U.S. GAAP. Our fiscal year ends on the Sunday closest to August 31. References to the first quarter of 2026 and 2025 relate to the 12-week fiscal quarters ended November 23, 2025, and November 24, 2024. Certain percentages presented are calculated using actual results prior to rounding.

Cash Flows from Financing Activities Net cash used in financing activities totaled $3,775 in 2025, compared to $10,764 in 2024. Cash flow used in financing activities primarily related to the payment of dividends, repayments of long-term debt and short-term borrowings, repurchases of common stock, and withholding taxes on stock-based awards. Cash flow provided by financing activities included proceeds from short-term borrowings and issuance of long-term debt.

Highlights for 2025 include: •We opened 27 new warehouses, including three relocations, for a total of 24 net new warehouses: 15 in the U.S., two in our Canadian segment, and seven in our Other International segment, compared to 30 new warehouses, including one relocation, in 2024; •Net sales increased 8% to $269,912, driven by an increase in comparable sales and sales at new warehouses; •Membership fee revenue increased 10% to $5,323, driven by new member sign-ups and membership fee increases; •Gross margin percentage increased 20 basis points; 11 basis points excluding the impact of gasoline price deflation on net sales; •SG&A expenses as a percentage of net sales increased 11 basis points; three basis points excluding the impact of gasoline price deflation; •The effective tax rate in 2025 was 25.1%, compared to 24.4% in 2024; •Net income increased 10% to $8,099, or $18.21 per diluted share compared to $7,367, or $16.56 per diluted share in 2024. Foreign-exchange rates had a negative impact on net income of $97, $0.22 per diluted share; and

Table of Contents Item 2-Management's Discussion and Analysis of Financial Condition and Results of Operations (amounts in millions, except per share, share, percentages and warehouse count data)

OVERVIEW Management's Discussion and Analysis of Financial Condition and Results of Operations (MD&A) is intended to promote understanding of the results of operations and financial condition. MD&A is provided as a supplement to, and should be read in conjunction with, our condensed consolidated financial statements and the accompanying Notes to Financial Statements (Part I, Item 1 of this Form 10-Q), as well as our consolidated financial statements, the accompanying Notes to Financial Statements, and the related MD&A in our fiscal year 2025 Form 10-K, which was filed with the Securities and Exchange Commission on October 8, 2025. We operate membership warehouses and e-commerce sites based on the concept that offering low prices on a limited selection of nationally-branded and private-label products in a wide range of categories will produce high sales volumes and rapid inventory turnover. When combined with the operating efficiencies achieved by volume purchasing, efficient distribution and reduced handling of merchandise in no-frills, self-service warehouse facilities, these volumes and turnover enable us to operate profitably at significantly lower gross margins (net sales less merchandise costs) than most other retailers. We often sell inventory before we are required to pay for it, even while taking advantage of early payment discounts. We believe that the most important driver of our profitability is increasing net sales, particularly comparable sales. Net sales includes our core merchandise categories (foods and sundries, non-foods, and fresh foods), warehouse ancillary (gasoline, pharmacy, optical, food court, hearing aids, and tire installation) and other businesses (e-commerce, business centers, travel, and other). E-commerce and business center sales are allocated to the appropriate merchandise categories in the Net Sales discussion. The 2% reward associated with Executive membership reduces net sales and is allocated to the category in which the reward is generated (core merchandise categories, warehouse ancillary, and other businesses). Comparable sales is defined as net sales from warehouses open for more than one year, including remodels, relocations and expansions, and digitally-enabled businesses operating for more than one year. Starting this quarter, we changed our e-commerce comparable sales metric to digitally-enabled comparable sales. This metric represents sales delivered to members that are initiated through a digital device, whether fulfilled through a warehouse or a distribution center, as well as Costco Travel. The measure is intended as supplemental information and is not a substitute for net sales presented in accordance with U.S. GAAP and should be reviewed in conjunction with results reported in accordance with U.S. GAAP. Comparable sales growth is achieved through increasing shopping frequency from new and existing members and the amount they spend on each visit (average ticket). Sales comparisons can also be particularly influenced by certain factors that are beyond our control: fluctuations in currency exchange rates (with respect to our international operations) and inflation or deflation in the cost of gasoline and associated competitive conditions. The higher our comparable sales exclusive of these items, the more we can leverage our selling, general and administrative (SG&A) expenses, reducing them as a percentage of sales and enhancing profitability. Generating comparable sales growth is foremost a question of making available the right merchandise at the right prices, a skill that we believe we have repeatedly demonstrated over the long-term. Another substantial factor in net sales growth is the health of the economies in which we do business, including the effects of inflation or deflation, especially the United States. Net sales growth and gross margins are also impacted by competition, which is vigorous and widespread, across a wide range of global, national and regional wholesalers and retailers, including those with e-commerce operations. While we cannot control or reliably predict general economic health or changes in competition, we believe that we have been successful historically in adapting our business to these changes, such as through adjustments to our pricing and merchandise mix, including increasing the penetration of our private-label items, and through online offerings. Our philosophy is to provide our members with quality goods and services at competitive prices. We do not focus in the short-term on maximizing prices charged, but instead seek to maintain what we believe is a perception among our members of our "pricing authority" - consistently providing the most competitive values. Our net sales and gross margin are influenced in part by our merchandising and pricing strategies in response to cost increases. Those strategies can include, but are not limited to, working with our suppliers to share in absorbing cost increases, earlier-than-usual purchasing and in greater volumes, sourcing in the countries and regions where items are sold, as well as passing cost increases on to our members. Our investments in merchandise pricing may include reducing prices on merchandise to drive sales or meet competition and holding prices steady despite cost increases instead of passing the increases on to our members, negatively impacting gross margin and gross margin as a percentage of net sales (gross margin percentage) in the near term. Our e-commerce business, domestically and internationally, has a lower gross-margin percentage than our warehouse operations. Government actions in various countries relating to tariffs affect the costs of some of our merchandise. The degree of our exposure is dependent on (among other things) the type of goods, rates imposed, and timing of the tariffs. Higher tariffs are more likely to adversely impact rather than improve our results.

Cash Flows from Operating Activities Net cash provided by operating activities totaled $4,688 in the first quarter of 2026, compared to $3,260 in the first quarter of 2025. Our cash flow provided by operations is primarily from net sales and membership fees. Cash flow used in operations generally consists of payments to suppliers, warehouse operating costs, including wages and employee benefits, utilities, credit and debit card processing fees, and operating leases. Cash used in operations also includes payments for income taxes. Changes in our net investment in merchandise inventories (the difference between merchandise inventories and accounts payable) is impacted by several factors, including inventory levels and turnover, payment terms with suppliers, and early payments to obtain discounts.

Cash Flows from Investing Activities Net cash used in investing activities totaled $1,398 in the first quarter of 2026, compared to $985 in the first quarter of 2025, and is primarily related to capital expenditures. Net cash from investing activities also includes purchases and maturities of short-term investments.

Capital Expenditure Plans Our primary requirements for capital are acquiring land, buildings, and equipment for new and remodeled warehouses, information systems, and manufacturing and distribution facilities. In the first quarter of 2026, we spent $1,526 on capital expenditures, and it is our current intention to spend approximately $6,500 during fiscal 2026. These expenditures are expected to be financed with cash from operations, cash and cash equivalents, and short-term investments. We opened eight new warehouses, including one relocation, in the first quarter of 2026, and plan to open 25 additional new warehouses, including four relocations, in the remainder of fiscal 2026. There can be no assurance that current expectations will be realized, and plans are subject to change upon further review of our capital expenditure needs and the economic environment.

Dividends A quarterly cash dividend of $1.30 per share was declared on October 15, 2025, and paid on November 14, 2025. 23 Share Repurchase Program On January 19, 2023, the Board of Directors authorized a share repurchase program in the amount of $4,000, which expires in January 2027. During the first quarter of 2026 and 2025, we repurchased 225,000 and 230,000 shares of common stock, at an average price per share of $932.02 and $899.23, totaling approximately $210 and $206. These amounts may differ from the accompanying condensed consolidated statements of cash flows due to changes in unsettled repurchases at the end of a quarter. Purchases are made from time to time, as conditions warrant, in the open market or in block purchases, pursuant to plans under SEC Rule 10b5-1. Repurchased shares are retired, in accordance with the Washington Business Corporation Act. The remaining amount available to be purchased under our approved plan was $1,752 at the end of the first quarter.

Bank Credit Facilities and Commercial Paper Programs We maintain bank credit facilities for working capital and general corporate purposes. At November 23, 2025, we had borrowing capacity under these facilities of $1,320. Our international operations maintain $821 of this capacity under bank credit facilities, of which $188 is guaranteed by the Company. Short-term borrowings outstanding under the bank credit facilities, which are included in other current liabilities on the condensed consolidated balance sheets, were immaterial at the end of the first quarter of 2026 and at the end of 2025. We have letter of credit facilities, for commercial and standby letters of credit, totaling $227. The outstanding commitments under these facilities at the end of the first quarter of 2026 totaled $193, most of which were standby letters of credit that do not expire or have expiration dates within one year. The bank credit facilities have various expiration dates, most within one year, and we generally intend to renew these facilities. The amount of borrowings available at any time under our bank credit facilities is reduced by the amount of standby and commercial letters of credit outstanding.

Recent Accounting Pronouncements See discussion of Recent Accounting Pronouncements in Note 1 to the condensed consolidated financial statements included in Part I, Item 1 of this Report.