Costco Wholesale Corp /new,
Fiscal Year 2023.

Cash Flows from Financing Activities Net cash used in financing activities totaled $2,614 in 2023, compared to $4,283 in 2022. Cash flows used in financing activities primarily related to the payment of dividends, repurchases of common stock, and withholding taxes on stock-based awards. In 2022, cash flow used in financing activities included 26 payments to our former joint-venture partner for a dividend and the purchase of their equity interest in Taiwan, totaling $1,050 in the aggregate, and repayments of our 2.300% Senior Notes.

Interest Expense 202220212020 Interest expense$158 $171 $160 Interest expense primarily relates to Senior Notes and financing leases. Interest expense decreased in 2022 due to repayment of the 2.300% Senior Notes on December 1, 2021. For more information on our debt arrangements, refer to the consolidated financial statements included in Item 8 of this Report.

Provision for Income Taxes 202220212020 Provision for income taxes$1,925 $1,601 $1,308 Effective tax rate24.6 %24.0 %24.4 % The effective tax rate for 2022 was impacted by net discrete tax benefits of $130. This included $94 of excess tax benefits related to stock compensation. Excluding discrete net tax benefits, the tax rate was 26.2% for 2022. The effective tax rate for 2021 was impacted by net discrete tax benefits of $163. This included $75 of excess tax benefits related to stock compensation, $70 related to the special cash dividend paid through our 401(k) plan, and $19 related to a reduction in the valuation allowance against certain deferred tax assets. Excluding net discrete tax benefits, the tax rate was 26.4% for 2021.

Dividends Cash dividends declared in 2022 totaled $3.38 per share, as compared to $12.98 per share in 2021. Dividends in 2021 included a special dividend of $10.00 per share, aggregating approximately $4,430. In April 2022, the Board of Directors increased our quarterly cash dividend from $0.79 to $0.90 per share.

Comparable Sales Comparable sales increased 14% during 2022 and were positively impacted by increases in shopping frequency and average ticket, which includes the effects of inflation and changes in foreign currency. E-commerce comparable sales increased 10% during 2022, including inflation. 25

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 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 model is generally the same across our U.S., Canadian, and Other International operating segments (see Note 11 to the consolidated financial statements included in Item 8 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 of foreign-exchange rate changes is calculated based on the difference between the current and prior period's currency 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 sold. Results expressed excluding the impacts of foreign exchange and gasoline prices should be reviewed in conjunction with results reported in accordance with U.S. GAAP. 21 Our fiscal year ends on the Sunday closest to August 31. References to 2023 relate to the 53-week fiscal year ended September 3, 2023. References to 2022 and 2021 relate to the 52-week fiscal years ended August 28, 2022, and August 29, 2021. Certain percentages presented are calculated using actual results prior to rounding. Unless otherwise noted, references to net income relate to net income attributable to Costco.

Overview 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). Comparable sales is defined as net sales from warehouses open for more than one year, including remodels, relocations and expansions, and sales related to e-commerce websites operating for more than one year. The measure is intended as supplemental information and is not a substitute for net sales presented in accordance with U.S. generally accepted accounting principles (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); inflation or deflation and changes in the cost of gasoline and associated competitive conditions. The higher our comparable sales exclusive of these items, the more we can leverage our SG&A expenses, reducing them as a percentage of sales and enhancing profitability. Generating comparable sales growth is foremost a question of making available to our members 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 our 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. Merchandise costs in 2023 continued to be impacted by inflation, however at a lower rate than what we experienced in 2022. The impact to our net sales and gross margin is 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, 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, all negatively impacting gross margin and gross margin as a percentage of net sales (gross margin percentage). We believe our gasoline business enhances traffic in our warehouses, but 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. Rapidly changing gasoline prices may significantly impact our near-term net sales growth. 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. Government actions in various countries relating to tariffs, particularly China and the United States, have affected 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 could adversely impact our results. We also achieve net sales growth by opening new warehouses. As our warehouse base grows, available and desirable sites become more difficult to secure, and square footage growth becomes a comparatively less substantial component of growth. The negative aspects of such growth, however, including lower initial operating profitability relative to existing warehouses and cannibalization of sales at existing warehouses when openings occur in existing markets, are continuing to decline in significance as they relate to the results of our total operations. Our rate of square footage growth is generally higher in foreign markets, due to the smaller base in those markets, and we expect that to continue. Our e-commerce business, domestically and internationally, generally has a lower gross margin percentage than our warehouse operations. The membership format is an integral part of our business and has a significant effect on our profitability. This format is designed to reinforce member loyalty and provide continuing fee revenue. The extent to which we achieve growth in our membership base, increase the penetration of our Executive members, and sustain high renewal rates materially influences our profitability. Our paid-membership growth rate may be adversely impacted when warehouse openings occur in existing markets as compared to new markets.

Interest Income and Other, Net 202320222021 Interest income$470 $61 $41 Foreign-currency transaction gains, net29 106 56 Other, net34 38 46 Interest income and other, net$533 $205 $143 The increase in interest income in 2023 was due to higher global interest rates and higher average cash and investment balances. Foreign-currency transaction gains, net include revaluation or settlement of monetary assets and liabilities by our Canadian and Other International operations and mark-to-market adjustments for forward foreign-exchange contracts. See Derivatives and Foreign Currency sections in Note 1 to the consolidated financial statements included in Item 8 of this Report.

LIQUIDITY AND CAPITAL RESOURCES The following table summarizes our significant sources and uses of cash and cash equivalents: 202320222021 Net cash provided by operating activities$11,068 $7,392 $8,958

Net cash used in investing activities(4,972)(3,915)(3,535) Net cash used in financing activities(2,614)(4,283)(6,488) 25 Our primary sources of liquidity are cash flows from operations, cash and cash equivalents, and short-term investments. Cash and cash equivalents and short-term investments were $15,234 and $11,049 at September 3, 2023, and August 28, 2022. Of these balances, unsettled credit and debit card receivables represented $2,282 and $2,010. These receivables generally settle within four days. Changes in foreign exchange rates impacted cash and cash equivalents positively by $15 and $46 in 2023 and 2021, and negatively by $249 in 2022. Material contractual obligations arising in the normal course of business primarily consist of purchase obligations, long-term debt and related interest payments, leases, and construction and land purchase obligations. See Notes 4 and 5 to the consolidated financial statements included in Item 8 of this Report for amounts outstanding on September 3, 2023, related to debt and leases. Purchase obligations consist of contracts primarily related to merchandise, equipment, and third-party services, the majority of which are due in the next 12 months. Construction and land-purchase obligations consist of contracts primarily related to the development and opening of new and relocated warehouses, the majority of which (other than leases) are due in the next 12 months. Management believes that our cash and investment position and operating cash flows, with capacity under existing and available credit agreements, will be sufficient to meet our liquidity and capital requirements for the foreseeable future. We believe that our U.S. current and projected asset position is sufficient to meet our U.S. liquidity requirements.

Cash Flows from Operating Activities Net cash provided by operating activities totaled $11,068 in 2023, compared to $7,392 in 2022. Our cash flow provided by operations is primarily from net sales and membership fees. Cash flow used in operations generally consists of payments to merchandise suppliers, warehouse operating costs, including payroll and employee benefits, utilities, and credit and debit card processing fees. 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, the forward deployment of inventory to accelerate delivery times, payment terms with suppliers, and early payments to obtain discounts.

Cash Flows from Investing Activities Net cash used in investing activities totaled $4,972 in 2023, compared to $3,915 in 2022, and is primarily related to capital expenditures. Net cash flows from investing activities also includes purchases and maturities of short-term investments.

Capital Expenditures Our primary requirements for capital are acquiring land, buildings, and equipment for new and remodeled warehouses. Capital is also required for information systems, manufacturing and distribution facilities, initial warehouse operations, and working capital. In 2023, we spent $4,323 on capital expenditures, and it is our current intention to spend approximately $4,400 to $4,600 during fiscal 2024. These expenditures are expected to be financed with cash from operations, existing cash and cash equivalents, and short-term investments. We opened 26 new warehouses, including three relocations, in 2023, and plan to open up to 28 additional new warehouses, including one relocation, in 2024. 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.

Stock Repurchase Programs On January 19, 2023, the Board of Directors authorized a new share repurchase program in the amount of $4,000, which expires in January 2027. During 2023 and 2022, we repurchased 1,341,000 and 863,000 shares of common stock, at average prices of $504.68 and $511.46, totaling approximately $677 and $442. These amounts may differ from the accompanying consolidated statements of cash flows due to changes in unsettled repurchases at the end of each fiscal year. 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 $3,563 at the end of 2023.

Bank Credit Facilities and Commercial Paper Programs We maintain bank credit facilities for working capital and general corporate purposes. At September 3, 2023, we had borrowing capacity under these facilities of $1,234. Our international operations maintain $756 of this capacity under bank credit facilities, of which $167 is guaranteed by the Company. Short-term borrowings outstanding under the bank credit facilities, which are included in other current liabilities on the consolidated balance sheets, were immaterial at the end of 2023 and 2022. The Company has letter of credit facilities, for commercial and standby letters of credit, totaling $217. The outstanding commitments under these facilities at the end of 2023 totaled $182, 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.

Critical Accounting Estimates The preparation of our consolidated financial statements in accordance with U.S. GAAP requires that we make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. We base our estimates on historical experience and on assumptions that we believe to be reasonable, and we continue to review and evaluate these estimates. For further information on significant accounting policies, see discussion in Note 1 to the consolidated financial statements included in Item 8 of this Report.

Insurance/Self-insurance Liabilities Claims for employee health-care benefits, workers' compensation, general liability, property damage, directors' and officers' liability, vehicle liability, inventory loss, and other exposures are funded predominantly through self-insurance. Insurance coverage is maintained for certain risks to seek to limit exposures arising from very large losses. We use various risk management mechanisms, including a 27 wholly-owned captive insurance subsidiary, and participate in a reinsurance program. Liabilities associated with the risks that we retain are not discounted and are estimated using historical claims experience, demographic factors, severity factors, and other actuarial assumptions. The costs of claims are highly unpredictable and can fluctuate as a result of inflation rates, regulatory or legal changes, and unforeseen developments in claims. While we believe our estimates are reasonable, actual claims and costs could differ significantly from recorded liabilities. Historically, adjustments to our estimates have not been material.

Membership Fees 202320222021 Membership fees$4,580$4,224$3,877 Membership fees increase8 %9 %9 % 23 Membership fee revenue increased 8% in 2023, driven by new member sign-ups, upgrades to Executive membership, and the benefit of an additional week. Changes in foreign currencies relative to the U.S. dollar negatively impacted membership fees by $76 compared to 2022. At the end of 2023, our member renewal rates were 92.7% in the U.S. and Canada and 90.4% worldwide. More members auto renewing and higher penetration of Executive members benefit renewal rates. 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.

General economic factors, domestically and internationally, may adversely affect our business, financial condition, and results of operations. Higher energy and gasoline costs, inflation, levels of unemployment, healthcare costs, consumer debt levels, foreign-currency exchange rates, unsettled financial markets, weaknesses in housing and real estate markets, reduced consumer confidence, changes and uncertainties related to government fiscal, monetary and tax policies including changes in interest rates, tax rates, duties, tariffs, or other restrictions, sovereign debt crises, pandemics and other health crises, and other economic factors could adversely affect demand for our products and services, require a change in product mix, or impact the cost of or ability to purchase inventory. Additionally, trade-related actions in various countries, particularly China and the United States, have affected 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. The impact to our net sales and gross margin is influenced in part by our merchandising and pricing strategies in response to potential cost increases. Higher tariffs could adversely impact our results. 13 Prices of certain commodities, including gasoline and consumable goods used in manufacturing and our warehouse retail operations, are historically volatile and are subject to fluctuations arising from changes in domestic and international supply and demand, inflationary pressures, labor costs, competition, market speculation, government regulations, taxes and periodic delays in delivery. Rapid and significant changes in commodity prices and our ability and desire to pass them through to our members may affect our sales and profit margins. These factors could also increase our merchandise costs and selling, general and administrative expenses, and otherwise adversely affect our operations and financial results. General economic conditions can also be affected by events like the outbreak of hostilities, including but not limited to the Ukraine conflict, or acts of terrorism. Inflationary factors such as increases in merchandise costs may adversely affect our business, financial condition and results of operations. We may not be able to adjust prices to sufficiently offset the effect of cost increases without negatively impacting consumer demand. Suppliers may be unable to timely supply us with quality merchandise at competitive prices or may fail to adhere to our high standards, resulting in adverse effects on our business, merchandise inventories, sales, and profit margins. We depend heavily on our ability to purchase quality merchandise in sufficient quantities at competitive prices. As the quantities we require continue to grow, we have no assurances of continued supply, appropriate pricing or access to new products, and any supplier has the ability to change the terms upon which they sell to us or discontinue selling to us. Member demands may lead to out-of-stock positions causing a loss of sales and profits. We buy from numerous domestic and foreign suppliers and importers. Our inability to acquire suitable merchandise on acceptable terms or the loss of key suppliers could negatively affect us. We may not be able to develop relationships with new suppliers, and products from alternative sources, if any, may be of a lesser quality or more expensive. Because of our efforts to adhere to high-quality standards for which available supply may be limited, particularly for certain food items, the large volumes we demand may not be consistently available. Our efforts to secure supply could lead to commitments that prove to be unsuccessful in the short and long-term. Our suppliers (and those they depend upon for materials and services) are subject to risks, including labor disputes, union organizing activities, financial liquidity, natural disasters, extreme weather conditions, public health emergencies, supply constraints and general economic and political conditions and other risks similar to those we face that could limit their ability to timely provide us with acceptable merchandise. One or more of our suppliers might not adhere to our quality control, packaging, legal, regulatory, labor, environmental or animal welfare standards. These deficiencies may delay or preclude delivery of merchandise to us and might not be identified before we sell such merchandise to our members. This failure could lead to recalls and litigation and otherwise damage our reputation and our brands, increase costs, and otherwise adversely impact our business.

Fluctuations in foreign exchange rates may adversely affect our results of operations. During 2023, our international operations, including Canada, generated 27% and 34% of our net sales and operating income. Our international operations have accounted for an increasing portion of our warehouses, and we plan to continue international growth. To prepare our consolidated financial statements, we translate the financial statements of our international operations from local currencies into U.S. dollars using current exchange rates. Future fluctuations in exchange rates that are unfavorable to us may adversely affect the financial performance of our Canadian and Other International operations and have a corresponding adverse period-over-period effect on our results of operations. As we continue to expand internationally, our exposure to fluctuations in foreign exchange rates may increase. A portion of the products we purchase is paid for in a currency other than the local currency of the country in which the goods are sold. Currency fluctuations may increase our merchandise costs and may not be passed on to members and thus may adversely affect our results of operations. 14 Natural disasters, extreme weather conditions, or other catastrophic events could negatively affect our business, financial condition, and results of operations. Natural disasters and extreme weather conditions, including those impacted by climate change, such as hurricanes, typhoons, floods, earthquakes, wildfires, droughts; acts of terrorism or violence, including active shooter situations; and energy shortages; particularly in California or Washington state, where our centralized operating systems and administrative personnel are located, could negatively affect our operations and financial performance. Such events could result in physical damage to our properties, limitations on store operating hours, less frequent visits by members to physical locations, the temporary closure of warehouses, depots, manufacturing or home office facilities, the temporary lack of an adequate work force, disruptions to our IT systems, the temporary or long-term disruption in the supply of products from some local or overseas suppliers, the temporary disruption in the transport of goods to or from overseas, delays in the delivery of goods to our warehouses or depots, and the temporary reduction in the availability of products in our warehouses. These events could also reduce demand for our products or make it difficult or impossible to procure products. We may be required to suspend operations in some or all of our locations, which could have a material adverse effect on our business, financial condition and results of operations.

Factors associated with climate change could adversely affect our business. We use natural gas, diesel fuel, gasoline, and electricity in our distribution and warehouse operations. Government regulations limiting carbon dioxide and other greenhouse gas emissions and other environmental restrictions may increase compliance and merchandise costs, and other regulation affecting energy inputs could materially affect our profitability. As the economy transitions to lower carbon intensity we cannot guarantee that we will make adequate investments or successfully implement strategies that will effectively achieve our climate-related goals, which could lead to negative perceptions among members and other stakeholders and result in reputational harm. Climate change, extreme weather conditions, wildfires, droughts and rising sea levels could affect our ability to procure commodities at costs and in quantities we currently experience. We also sell a substantial amount of gasoline, the demand for which could be impacted by concerns about climate change and increased regulations. More stringent fuel economy standards, changing public policies aimed at increasing the adoption of zero-emission and alternative fuel vehicles and other regulations related to climate change, and evolving consumer preferences will affect our future operations and will adversely impact certain elements of our profitability and require significant capital expenditures. 15

Legal and Regulatory Risks We are subject to risks associated with the legislative, judicial, accounting, regulatory, political and economic factors specific to the countries or regions in which we operate, which could adversely affect our business, financial condition and results of operations. At the end of 2023, we operated 270 warehouses outside of the U.S. (31% of all warehouse locations), and we plan to continue expanding our international operations. Future operating results internationally could be negatively affected by a variety of factors, many similar to those we face in the U.S., certain of which are beyond our control. These factors include political and economic conditions, regulatory constraints, currency regulations, policy changes, and other matters in any of the countries or regions in which we operate, now or in the future. Other factors that may impact international operations include foreign trade (including tariffs and trade sanctions), monetary and fiscal policies and the laws and regulations of the U.S. and foreign governments, agencies and similar organizations, and risks associated with having major facilities in locations which have been historically less stable than the U.S. Risks inherent in international operations also include, among others, the costs and difficulties of managing international operations, adverse tax consequences, and difficulty in enforcing intellectual property rights. New reporting obligations globally are increasing the cost and complexity of doing business. Changes in accounting standards and subjective assumptions, estimates and judgments by management related to complex accounting matters could significantly affect our financial condition and results of operations. Accounting principles and related pronouncements, implementation guidelines, and interpretations we apply to a wide range of matters that are relevant to our business, including self-insurance liabilities, are highly complex and involve subjective assumptions, estimates and judgments by our management. Changes in rules or interpretation or changes in underlying assumptions, estimates or judgments by our management could significantly change our reported or expected financial performance and have a material impact on our consolidated financial statements.

We are exposed to risks relating to evaluations of controls required by Section 404 of the Sarbanes-Oxley Act and otherwise. Section 404 of the Sarbanes-Oxley Act of 2002 requires management assessments of the effectiveness of internal control over financial reporting and disclosure controls and procedures. If we are unable to maintain effective internal control over financial reporting or disclosure controls and procedures, our ability to record, process and report financial information accurately and to prepare financial statements within required time periods could be adversely affected, which could subject us to litigation or investigations requiring management resources and payment of legal and other expenses, negatively affect investor confidence in our financial statements and adversely impact our stock price. Uncertainties around our developing systems concerning controls for non-financial reporting also create risks. Changes in tax rates, new U.S. or foreign tax legislation, and exposure to additional tax liabilities could adversely affect our financial condition and results of operations. We are subject to a variety of taxes and tax collection and remittance obligations in the U.S. and numerous foreign jurisdictions. Additionally, at any point in time, we may be under examination for value 16 added, sales-based, payroll, product, import or other non-income taxes. We may recognize additional tax expense, be subject to additional tax liabilities, or incur losses and penalties, due to changes in laws, regulations, administrative practices, principles, assessments by authorities and interpretations related to tax, including tax rules in various jurisdictions. We compute our income tax provision based on enacted tax rates in the countries in which we operate. As tax rates vary among countries, a change in earnings attributable to the various jurisdictions in which we operate could result in an unfavorable change in our overall tax provision. Additionally, changes in the enacted tax rates or adverse outcomes in tax audits, including transfer pricing disputes, could have a material adverse effect on our financial condition and results of operations. Changes in or failure to comply with regulations relating to the use, storage, discharge and disposal of hazardous materials, hazardous and non-hazardous wastes and other environmental matters (such as recycling and extended producer responsibility requirements) could adversely impact our business, financial condition and results of operations. We are subject to a wide and increasingly broad array of federal, state, regional, local and international laws and regulations relating to the use, storage, discharge and disposal of hazardous materials, hazardous and non-hazardous wastes and other environmental matters. Failure to comply with these laws could result in harm to our members, employees or others, significant costs to satisfy environmental compliance, remediation or compensatory requirements, or the imposition of severe penalties or restrictions on operations by governmental agencies or courts that could adversely affect our business, financial condition and results of operations. Operations at our facilities require the treatment and disposal of wastewater, stormwater and agricultural and food processing wastes, the use and maintenance of refrigeration systems, including ammonia-based chillers, noise, odor and dust management, the operation of mechanized processing equipment, and other operations that potentially could affect the environment and public health and safety. Failure to comply with current and future environmental, health and safety standards could result in the imposition of fines and penalties, illness or injury of our employees, and claims or lawsuits related to such illnesses or injuries, and temporary closures or limits on the operations of facilities. We are involved in a number of legal proceedings and audits and some of these outcomes could adversely affect our business, financial condition and results of operations. Our business requires compliance with many laws and regulations. Failure to achieve compliance could subject us to lawsuits and other proceedings and lead to damage awards, fines, penalties, and remediation costs. We are or may become involved in a number of legal proceedings and audits, including grand jury investigations, government and agency investigations, and consumer, employment, tort, unclaimed property laws, and other litigation. We cannot predict with certainty the outcomes of these proceedings and other contingencies, including environmental remediation and other proceedings commenced by governmental authorities. The outcome of some of these proceedings, audits, unclaimed property laws, and other contingencies could require us to take, or refrain from taking, actions which could negatively affect our operations or could require us to pay substantial amounts of money, adversely affecting our financial condition and results of operations. Additionally, defending against these lawsuits and proceedings may involve significant expense and diversion of management's attention and resources.

Increased security threats and more sophisticated cyber misconduct pose a risk to our systems, networks, products and services. We rely upon IT systems and networks, some of which are managed by or belong to third parties, including suppliers, partners, vendors, and service providers. Additionally, we collect, store and process sensitive information relating to our business, members, employees, and other third parties. Operating these IT systems and networks, and processing and maintaining this data, in a secure manner, is critical to our business operations and strategy. Increased remote work has also increased the possible attack surfaces. Attempts to gain unauthorized access to systems, networks and data, both ours and third parties with whom we work, are increasing in frequency and sophistication, and in some cases, these attempts are successful. Cybersecurity attacks may range from random attempts to coordinated and targeted attacks, including sophisticated computer crimes and advanced persistent threats. Phishing attacks have emerged as particularly prominent, including as vectors for ransomware attacks, which have increased in breadth and frequency. While we train our employees as part of our security efforts, that training cannot be completely effective. These threats pose a risk to the security of our systems and networks and the confidentiality, integrity, and availability of our data. Our IT systems and networks, or those managed by third parties such as cloud providers or suppliers that otherwise host or have access to confidential information, periodically have vulnerabilities, which may go unnoticed for a period of time. Our logging capabilities, or the logging capabilities of third parties, are also not always complete or sufficiently detailed, affecting our ability to fully investigate and understand the scope of security events. While our cybersecurity and compliance efforts seek to mitigate such risks, there can be no guarantee that the actions and controls we and our third-party service providers have implemented and are implementing, will be sufficient to protect our systems, information or other property. The potential impacts of a cybersecurity attack include reputational damage, litigation, government enforcement actions, penalties, disruption to systems and operations, unauthorized release of confidential or otherwise protected information, corruption of data, diminution in the value of our investment in IT systems and increased cybersecurity protection and remediation costs. This could adversely affect our competitiveness, results of operations and financial condition and, critically in light of our business model, loss of member confidence. Further, the insurance coverage we maintain and indemnification arrangements with third parties may be inadequate to cover claims, costs, and liabilities relating to cybersecurity incidents. In addition, data we collect, store and process is subject to a variety of U.S. and international laws and regulations, such as the European Union's General Data Protection Regulation, California Consumer Privacy Act, Health Insurance Portability and Accountability Act, and other privacy and cybersecurity laws across the various states and around the globe, which may carry significant potential penalties for noncompliance.

We are subject to payment-related risks. We accept payments using a variety of methods, including select credit and debit cards, cash and checks, co-brand cardholder rebates, Executive member 2% reward certificates, and our shop card. As we offer 11 new payment options to our members, we may be subject to additional rules, regulations, compliance requirements, and higher fraud losses. For certain payment methods, we pay interchange and other related acceptance fees, along with additional transaction processing fees. We rely on third parties to provide payment transaction processing services for credit and debit cards and our shop card. It could disrupt our business if these parties become unwilling or unable to provide these services to us. We are also subject to fee increases by these service providers. We must comply with evolving payment card association and network operating rules, including data security rules, certification requirements and rules governing electronic funds transfers. For example, we are subject to Payment Card Industry Data Security Standards, which contain compliance guidelines and standards with regard to our security surrounding the physical and electronic storage, processing and transmission of individual cardholder data. If our internal systems are breached or compromised, we may be liable for card re-issuance costs, subject to fines and higher transaction fees and lose our ability to accept card payments from our members, and our business and operating results could be adversely affected. Our failure to offer payment methods desired by our members could create a competitive disadvantage.

Employee Base At the end of 2022, we employed 304,000 employees worldwide. The large majority (approximately 95%) is employed in our membership warehouses and distribution channels, and less than 10% are represented by unions. We also utilize seasonal employees during peak periods. The total number of employees by segment is:

General We operate membership warehouses and e-commerce websites based on the concept that offering our members 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 buy most of our merchandise directly from manufacturers and route it to cross-docking consolidation points (depots) or directly to our warehouses. Our depots receive large shipments from manufacturers and quickly ship these goods to warehouses. This process creates freight volume and handling efficiencies, lowering costs associated with traditional multiple-step distribution channels. For our e-commerce operations we ship merchandise through our depots, our logistics operations for big and bulky items, as well as through drop-ship and other delivery arrangements with our suppliers. Our average warehouse space is approximately 146,000 square feet, with newer units being slightly larger. Floor plans are designed for economy and efficiency in the use of selling space, the handling of merchandise, and the control of inventory. Because shoppers are attracted principally by the quality of merchandise and low prices, our warehouses are not elaborate. By strictly controlling the entrances and exits and using a membership format, we believe our inventory losses (shrinkage) are well below those of typical retail operations. Our warehouses on average operate on a seven-day, 70-hour week. Gasoline operations generally have extended hours. Because the hours of operation are shorter than many other retailers, and due to other efficiencies inherent in a warehouse-type operation, labor costs are lower relative to the volume of sales. Merchandise is generally stored on racks above the sales floor and displayed on pallets containing large quantities, reducing labor required. In general, with variations by country, our warehouses accept certain credit cards, including Costco co-branded cards, debit cards, cash and checks, Executive member 2% reward certificates, co-brand cardholder rebates, and our proprietary stored-value card (shop card). Our strategy is to provide our members with a broad range of high-quality merchandise at prices we believe are consistently lower than elsewhere. We seek to limit most items to fast-selling models, sizes, and colors. We carry less than 4,000 active stock keeping units (SKUs) per warehouse in our core warehouse business, significantly less than other broadline retailers. We average anywhere from 10,000 to 11,000 SKUs online, some of which are also available in our warehouses. Many consumable products are offered for sale in case, carton, or multiple-pack quantities only. In keeping with our policy of member satisfaction, we generally accept returns of merchandise. On certain electronic items, we typically have a 90-day return policy and provide, free of charge, technical support services, as well as an extended warranty. Additional third-party warranty coverage is sold on certain electronic items.

Richard A. GalantiExecutive Vice President and Chief Financial Officer. Mr. Galanti has been a director since January 1995.199366 Jim C. KlauerExecutive Vice President, Chief Operating Officer, Northern Division. Mr. Klauer was Senior Vice President, Non-Foods and E-commerce Merchandise, from 2013 to January 2018.201860 Patrick J. CallansExecutive Vice President, Administration. Mr. Callans was Senior Vice President, Human Resources and Risk Management, from 2013 to December 2018.201960 Russ D. MillerSenior Executive Vice President, U.S. Operations. Mr. Miller was Executive Vice President, Chief Operating Officer, Southern Division and Mexico, from January 2018 to May 2022. Mr. Miller was Senior Vice President, Western Canada Region, from 2001 to January 2018.201865 James P. MurphyExecutive Vice President, Chief Operating Officer, International Division. Mr. Murphy was Senior Vice President, International, from 2004 to October 2010. Mr. Murphy is retiring from the Company at the end of calendar year 2022.201169 Timothy L. RoseExecutive Vice President, Ancillary Businesses, Manufacturing, and Business Centers. Mr. Rose was Senior Vice President, Merchandising, Foods and Sundries and Private Label, from 1995 to December 2012. Mr. Rose is retiring from the Company effective November, 2022.201370 Yoram B. RubanenkoExecutive Vice President, Chief Operating Officer, Eastern Division. Mr. Rubanenko was Senior Vice President and General Manager, Southeast Region, from 2013 to September 2021, and Vice President, Regional Operations Manager for the Northeast Region, from 1998 to 2013.202158 John SullivanExecutive Vice President, General Counsel & Corporate Secretary. Mr. Sullivan has been General Counsel since 2016 and Corporate Secretary since 2010.202162 Claudine E. AdamoExecutive Vice President, Merchandising. Ms. Adamo was Senior Vice President, Non Foods, from 2018 to February 2022, and Vice President, Non Foods, from 2013 to 2018.202252 Caton FratesExecutive Vice President, Chief Operating Officer, Southwest Division. Mr. Frates was Senior Vice President, Los Angeles Division, from 2015 to May 2022.202254 Pierre RielExecutive Vice President, Chief Operating Officer, International Division. Mr. Riel was Senior Vice President, Country Manager, Canada, from 2019 to March 2022, and Senior Vice President, Eastern Canada Region, from 2001 to 2019.202259

•Fresh Foods (including meat, produce, service deli, and bakery) Warehouse Ancillary (includes gasoline, pharmacy, optical, food court, hearing aids, and tire installation) and Other Businesses (includes e-commerce, business centers, travel, and other) Warehouse ancillary businesses operate primarily within or next to our warehouses, encouraging members to shop more frequently. The number of warehouses with gas stations varies significantly by country, and we have no gasoline business in Korea or China. We operated 668 gas stations at the end of 2022. Net sales for our gasoline business increased to approximately 14% of total net sales in 2022. Our other businesses sell products and services that complement our warehouse operations (core and warehouse ancillary businesses). Our e-commerce operations give members convenience and a broader selection of goods and services. Net sales for e-commerce represented approximately 7% of total net sales in 2022. This figure does not include other services we offer online in certain countries such as business delivery, travel, same-day grocery, and various other services. Our business centers carry items tailored specifically for food services, convenience stores and offices, and offer walk-in shopping and deliveries. Business centers are included in our total warehouse count. Costco Travel offers vacation packages, hotels, cruises, and other travel products exclusively for Costco members (offered in the U.S., Canada, and the U.K.). We have direct buying relationships with many producers of brand-name merchandise. We do not obtain a significant portion of merchandise from any one supplier. The COVID-19 pandemic created unprecedented supply constraints, including disruptions and delays that have impacted and could continue to impact the flow and availability of certain products. When sources of supply become unavailable, we seek alternatives. We also purchase and manufacture private-label merchandise, as long as quality and member demand are high and the value to our members is significant. Certain financial information for our segments and geographic areas is included in Note 11 to the consolidated financial statements included in Item 8 of this Report.

Membership Our members may utilize their memberships at all of our warehouses and websites. Gold Star memberships are available to individuals; Business memberships are limited to businesses, including individuals with a business license, retail sales license, or comparable document. Business members may add additional cardholders (affiliates), to which the same annual fee applies. Affiliates are not available for Gold Star members. Our annual fee for these memberships is $60 in the U.S. and varies in other countries. All paid memberships include a free household card. Our member renewal rate was 93% in the U.S. and Canada and 90% worldwide at the end of 2022. The majority of members renew within six months following their renewal date. 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 membership counts include active memberships as well as memberships that have not renewed within the 12 months prior to the reporting date. At the end of 2020, we standardized our membership count methodology globally to be consistent with the U.S. and Canada, which resulted in the addition to the count of approximately 2.0 million total cardholders for 2020, of which 1.3 million were paid members. Membership fee income and the renewal rate calculations were not affected. Our membership was made up of the following (in thousands):

Item 1-Business Costco Wholesale Corporation and its subsidiaries (Costco or the Company) began operations in 1983, in Seattle, Washington. We are principally engaged in the operation of membership warehouses in the United States (U.S.) and Puerto Rico, Canada, Mexico, Japan, the United Kingdom (U.K.), Korea, Australia, Taiwan, China, Spain, France, Iceland, New Zealand, and Sweden. Costco operated 861, 838, and 815 warehouses worldwide at September 3, 2023, August 28, 2022, and August 29, 2021. The Company operates e-commerce websites in the U.S., Canada, Mexico, the U.K., Korea, Taiwan, Japan, and Australia. Our common stock trades on the NASDAQ Global Select Market, under the symbol "COST." We report on a 52/53-week fiscal year, consisting of thirteen four-week periods and ending on the Sunday nearest the end of August. The first three quarters consist of three periods each, and the fourth quarter consists of four periods (five weeks in the thirteenth period in a 53-week year). The material seasonal impact in our operations is increased net sales and earnings during the winter holiday season. References to 2023 relate to the 53-week fiscal year ended September 3, 2023. References to 2022 and 2021 relate to the 52-week fiscal years ended August 28, 2022, and August 29, 2021.

Total employees316,000 304,000 288,000 Growth and Engagement We believe that our warehouses are among the most productive in the retail industry, owing largely to the commitment and efficiency of our employees. We seek to provide them not merely with employment but careers. Many attributes of our business contribute to the objective. The more significant include: competitive compensation and benefits for those working in our membership warehouses and distributions channels; a commitment to promoting from within; and a target ratio of at least 50% of our employee base being full-time employees. These attributes contribute to what we consider, especially for the industry, a high retention rate. In 2023, in the U.S. that rate was approximately 90% for employees who have been with us for at least one year.

Competition Our industry is highly competitive, based on factors such as price, merchandise quality and selection, location, convenience, distribution strategy, and customer service. We compete on a worldwide basis with global, national, and regional wholesalers and retailers, including supermarkets, supercenters, online 6 retailers, gasoline stations, hard discounters, department and specialty stores, and operators selling a single category or narrow range of merchandise. Walmart, Target, Kroger, and Amazon are among our significant general merchandise retail competitors in the U.S. We also compete with other warehouse clubs, including Walmart's Sam's Club and BJ's Wholesale Club in the U.S. Many of the major metropolitan areas in the U.S. and certain of our Other International locations have multiple competing clubs.

Total paid members71,000 65,800 61,700 Household cards56,900 53,100 49,900 Total cardholders127,900 118,900 111,600 Paid cardholders (except affiliates) are eligible to upgrade to an Executive membership in the U.S., for an additional annual fee of $60. Executive memberships are also available in Canada, Mexico, the U.K., Japan, Korea, Taiwan, and Australia, for which the additional fee varies. Executive members earn a 2% reward on qualified purchases (generally up to a maximum reward of $1,000 per year), redeemable at Costco warehouses. This program offers services that vary by state and country and provide access to additional savings and benefits on various business and consumer services, such as auto and home insurance, the Costco auto purchase program, and check printing. Executive members totaled 32.3 million and represented 45.4% of paid members. The sales penetration of Executive members represented approximately 72.8% of worldwide net sales in 2023.

Human Capital Our Code of Ethics requires that we "Take Care of Our Employees," which is fundamental to the obligation to "Take Care of Our Members." We must also carefully control our selling, general and administrative (SG&A) expenses, so that we can sell high quality goods and services at low prices. Compensation and benefits for employees is our largest expense after the cost of merchandise and is carefully monitored. 5