Cdw Corp,
Fiscal Year 2023.

Non-GAAP net income per diluted share$9.88 $9.79 Shares used in computing US GAAP and Non-GAAP net income per diluted share136.3 137.0 (1)Income tax on non-GAAP adjustments includes excess tax benefits associated with equity-based compensation.

Share Repurchase Program During 2023, we repurchased 2.6 million shares of our common stock for $500 million under the previously announced share repurchase program. For additional information about our share repurchase program, refer to Note 12 (Stockholders' Equity) to the accompanying Consolidated Financial Statements. 32

(2)The change is primarily due to higher sales activity during the fourth quarter 2023, partially offset by collection performance. (3)The change is primarily due to higher sales activity during the fourth quarter 2023 and timing of payments. (4)The change is primarily due to lower contract assets and vendor receivables, partially offset by decreased accrued compensation and lower contract liabilities in 2023. In order to manage our working capital and operating cash needs, we monitor our cash conversion cycle, defined as days of sales outstanding in accounts receivable plus days of supply in inventory minus days of purchases outstanding in accounts payable, based on a rolling three-month average. Components of our cash conversion cycle are as follows: December 31,

(2)Defined as Total debt minus Cash and cash equivalents. (3)Defined as days of sales outstanding in Accounts receivable and certain receivables due from vendors plus days of supply in Merchandise inventory minus days of purchases outstanding in Accounts payable and Accounts payable-inventory financing, based on a rolling three-month average. (4)Defined as Cash flows provided by operating activities less capital expenditures, adjusted to include cash flows from financing activities that relate to the purchase of inventory.

Overview CDW Corporation, a Fortune 500 company and member of the S&P 500 Index, is a leading multi-brand provider of information technology ("IT") solutions to small, medium and large business, government, education and healthcare customers in the US, the UK and Canada. Our broad array of offerings ranges from discrete hardware and software products to integrated IT solutions and services that include on-premise and cloud capabilities across hybrid infrastructure, digital experience and security. We are vendor, technology, and consumption model "agnostic", with a solutions portfolio including more than 100,000 products and services from more than 1,000 leading and emerging brands. Our solutions are delivered in physical, virtual and cloud-based environments through approximately 10,600 customer-facing coworkers, including sellers, highly-skilled technology specialists and advanced service delivery engineers. We are a leading sales channel partner for many original equipment manufacturers ("OEMs"), software publishers and cloud providers (collectively, our "vendor partners"), whose products we sell or include in the solutions we offer. We provide our vendor partners with a cost-effective way to reach customers and deliver a consistent brand experience through our established end-market coverage, technical expertise and extensive customer access. On December 1, 2021, we completed the acquisition of Sirius Computer Solutions, Inc. ("Sirius"). Sirius is a leading provider of secure, mission-critical technology-based solutions and is one of the largest IT solutions integrators in the United States, leveraging its services-led approach, broad portfolio of hybrid infrastructure solutions, and deep technical expertise of its 2,600 coworkers to support corporate and public customers. This strategic acquisition has enhanced our breadth and depth of services and solutions offerings. We have three reportable segments, Corporate, Small Business and Public. Our Corporate segment primarily serves US private sector business customers with more than 250 employees. Our Small Business segment primarily serves US private sector business customers with up to 250 employees. Our Public segment is comprised of government agencies and education and healthcare institutions in the US. We also have two other operating segments: CDW UK and CDW Canada, each of which do not meet the reportable segment quantitative thresholds and, accordingly, are included in an all other category ("Other"). The financial results of Sirius have been included in our Consolidated Financial Statements and the results of our Corporate, Small Business and Public segments since the date of the acquisition. We may sell all or only select products that our vendor partners offer. Each vendor partner agreement provides for specific terms and conditions, which may include one or more of the following: product return privileges, price protection policies, purchase discounts and vendor incentive programs, such as purchase or sales rebates and cooperative advertising reimbursements. We also resell software for major software publishers. Our agreements with software publishers allow the end-user customer to acquire software or licensed products and services. In addition to helping our customers determine the best software solutions for their needs, we help them manage their software agreements, including warranties and renewals. A significant portion of our advertising and marketing expenses are reimbursed through cooperative advertising programs with our vendor partners. These programs are at the discretion of our vendor partners and are typically tied to sales or other commitments to be met by us within a specified period of time. For a discussion of results for the year ended December 31, 2021, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" of our Annual Report on Form 10-K for the year ended December 31, 2021, filed with the Securities and Exchange Commission on February 28, 2022.

$2.090 On February 8, 2023, we announced that our Board of Directors declared a quarterly cash dividend on our common stock of $0.590 per share. The dividend will be paid on March 10, 2023 to all stockholders of record as of the close of business on February 24, 2023. The payment of any future dividends will be at the discretion of our Board of Directors and will depend upon our results of operations, financial condition, business prospects, capital requirements, contractual restrictions, any potential indebtedness we may incur, restrictions imposed by applicable law, tax considerations and other factors that our Board of Directors deems relevant. In addition, our ability to pay dividends on our common stock will be limited by restrictions on our ability to pay dividends or make distributions to our stockholders and on the ability of our subsidiaries to pay dividends or make distributions to us, in each case, under the terms of our current and any future agreements governing our indebtedness.

20232022 (dollars in millions)Net SalesPercentageof Total Net SalesNet SalesPercentageof Total Net SalesDollarChangePercentChange(1) Corporate$8,960.8 41.9 %$10,350.1 43.6 %$(1,389.3)(13.4)%

Trends and Key Factors Affecting our Financial Performance We believe the following key factors may have a meaningful impact on our business performance, influencing our ability to generate sales and achieve our targeted financial and operating results: •General economic conditions are a key factor affecting our results as they can impact our customers' willingness and ability to spend on information technology. Macroeconomic uncertainty persists as a result of the current inflationary environment, the corresponding increase in interest rates driven by monetary policy and lower economic growth rates in the United States and other countries. The uncertainty in the current economic environment resulted in, and may continue to result in, a delay, pause or reduction of investments in technology by our customers. •Customers continue to balance priorities to focus on solutions that lead to business optimization, cost management and security risk management and in many cases are reassessing the timing of IT refresh cycles and pausing or deferring their IT spend. We have orchestrated solutions by leveraging netcomm products, security, software and hybrid and cloud offerings to help customers achieve their objectives. •Changes in spending policies, budget priorities and funding levels, including current and future stimulus packages, are key factors influencing the purchasing levels of Government, Healthcare and Education customers. As the duration and ongoing impact of current economic conditions remain uncertain, current and future budget priorities and funding levels for Government, Healthcare and Education customers may be adversely affected, leading to lower IT spend. •Technology trends drive customer purchasing behaviors in the market. Current technology trends are focused on delivering greater flexibility and efficiency, as well as designing and managing IT securely. These trends are driving customer adoption of solutions such as those delivered via cloud, software defined architectures and hybrid on-premise and off-premise combinations, as well as the evolution of the IT consumption model to more "as a service" offerings, including software as a service and infrastructure as a service, in addition to ongoing managed and professional service arrangements. Technology trends are likely to change as customers prioritize the projects that produce the most important outcomes for their business.

Small Business Small Business segment Net sales for the year ended December 31, 2023 decreased $383 million, or 19.7%, compared to the year ended December 31, 2022. This decrease was across various categories primarily within notebooks/mobile devices. Small Business segment Operating income was $177 million for the year ended December 31, 2023, a decrease of $10 million, or 5.1%, compared to $187 million for the year ended December 31, 2022. Small Business segment Operating income decreased primarily due to lower Gross profit dollars, partially offset by lower payroll expenses and reduced discretionary spend.

Key Business Metrics We monitor a number of financial and non-financial measures and ratios on a regular basis in order to track the progress of our business and make adjustments as necessary. We believe that the most important of these measures and ratios include average daily sales, Gross profit, Net income, Operating income, Operating income margin, Non-GAAP operating income, Non-GAAP operating income margin, Non-GAAP net income, Net sales on a constant currency basis, Net income per diluted share, Non-GAAP net income per diluted share, Free cash flow, Adjusted free cash flow, Cash and cash equivalents, cash conversion cycle and debt levels including available credit. These measures and ratios are closely monitored by management, so that actions can be taken, as necessary, in order to achieve financial objectives. In this section, we present Non-GAAP operating income, Non-GAAP operating income margin, Non-GAAP net income, Non-GAAP net income per diluted share, Net sales on a constant currency basis, Free cash flow and Adjusted free cash flow, which are non-GAAP financial measures. We believe Non-GAAP operating income, Non-GAAP operating income margin, Non-GAAP net income, Non-GAAP net income per diluted share and Net sales on a constant currency basis provide analysts, investors and management with helpful information regarding the underlying operating performance of our business, as they remove the impact of items that management believes are not reflective of underlying operating performance. Management uses these measures to evaluate period-over-period performance as management believes they provide a more comparable measure of the underlying business. We also present Free cash flow and Adjusted free cash flow as we believe these measures provide more information regarding our liquidity and capital resources. Certain non-GAAP financial measures are also used to determine certain components of performance-based compensation. For the definitions of Non-GAAP measures and reconciliations to the most directly comparable US GAAP measure, see "Results of Operations - Non-GAAP Financial Measure Reconciliations." 26

Non-GAAP Financial Measure Reconciliations We have included reconciliations of Non-GAAP operating income, Non-GAAP operating income margin, Non-GAAP net income, Non-GAAP net income per diluted share, Net sales on a constant currency basis, Free cash flow and Adjusted free cash flow for the years ended December 31, 2023 and 2022 below. Non-GAAP operating income excludes, among other things, charges related to the amortization of acquisition-related intangible assets, equity-based compensation and the associated payroll taxes, acquisition and integration expenses, transformation initiatives and workplace optimization. Non-GAAP operating income margin is defined as Non-GAAP operating income as a percentage of Net sales. Non-GAAP net income excludes, among other things, charges related to acquisition-related intangible asset amortization, equity-based compensation, acquisition and integration expenses, transformation initiatives, workplace optimization and the associated tax effects of each. Net sales on a constant currency basis is defined as Net sales excluding the impact of foreign currency translation on Net sales compared to the prior period. Free cash flow is defined as cash flows provided by operating activities less capital expenditures. Adjusted free cash flow is defined as Free cash flow adjusted to include certain cash flows from financing activities incurred in the normal course of operations or as capital expenditures. Non-GAAP operating income, Non-GAAP operating income margin, Non-GAAP net income, Non-GAAP net income per diluted share, Net sales on a constant currency basis, Free cash flow and Adjusted free cash flow are considered non-GAAP financial measures. Generally, a non-GAAP financial measure is a numerical measure of a company's performance or financial condition that either excludes or includes amounts that are not normally included or excluded in the most directly comparable measure calculated and presented in accordance with US GAAP. Non-GAAP measures used by management may differ from similar measures used by other companies, even when similar terms are used to identify such measures. We believe Non-GAAP operating income, Non-GAAP operating income margin, Non-GAAP net income, Non-GAAP net income per diluted share and Net sales on a constant currency basis provide analysts, investors and management with useful information regarding the underlying operating performance of our business, as they remove the impact of items that management believes are not reflective of underlying operating performance. Management uses these measures to evaluate period-over-period performance as management believes they provide a more comparable measure of the underlying business. We also present Free cash flow and Adjusted free cash flow as we believe these measures provide more information regarding our liquidity and capital resources. Certain non-GAAP financial measures are also used to determine certain components of performance-based compensation.

Non-GAAP operating income and Non-GAAP operating income margin Year Ended December 31, (dollars in millions)2023% of Net Sales2022% of Net Sales% Change

The results of certain key business metrics are as follows: Year Ended December 31, (dollars in millions, except per share amounts)20232022 Net sales$21,376.0 $23,748.7

Seasonality While we have not historically experienced significant seasonality throughout the year, sales in our Corporate segment, which primarily serves US private sector business customers with more than 250 employees, have historically been higher in the fourth quarter than in other quarters due to customers spending their remaining technology budget dollars at the end of the year. Additionally, sales in our Public segment have historically been higher in the third quarter than in other quarters primarily due to the buying patterns of the federal government and education customers. Since 2020, we have experienced variability compared to historic seasonality trends. Seasonality by channel is expected to continue to be different than historical experience.

Long-Term Debt and Financing Arrangements During the year ended December 31, 2023, we prepaid $150 million on our senior unsecured term loan facility without penalty. No additional mandatory payments are required on the remaining principal amount until its maturity date on December 1, 2026. As of December 31, 2023, we had total unsecured indebtedness of $5.6 billion and we were in compliance with the covenants under our credit agreements and indentures. We may from time to time repurchase one or more series of our outstanding unsecured senior notes, depending on market conditions, contractual commitments, our capital needs and other factors. Repurchases of our senior notes may be made by open market or private transactions and may be pursuant to Rule 10b5-1 plans or otherwise.

Dividends A summary of 2023 dividend activity for our common stock is as follows: Dividend AmountDeclaration DateRecord Date Payment Date $0.590 February 7, 2023February 24, 2023March 10, 2023

Cash Flows Cash flows from operating, investing and financing activities are as follows: Year Ended December 31, (dollars in millions)20232022 Net cash provided by (used in):

Cash conversion cycle17 21 (1)Represents the rolling three-month average of the balance of Accounts receivable, net at the end of the period, divided by average daily Net sales for the same three-month period. Also incorporates components of other miscellaneous receivables. (2)Represents the rolling three-month average of the balance of Merchandise inventory at the end of the period divided by average daily Cost of sales for the same three-month period. (3)Represents the rolling three-month average of the combined balance of Accounts payable-trade, excluding cash overdrafts, and Accounts payable-inventory financing at the end of the period divided by average daily Cost of sales for the same three-month period. The cash conversion cycle decreased to 17 days at December 31, 2023, compared to 21 days at December 31, 2022. The overall decrease was primarily driven by a reduction in DIO resulting from lower stocking positions. In addition, netted down revenue has an unfavorable impact to DSO and a favorable impact to DPO as the corresponding receivables and payables reflect the gross amounts due from customers and due to vendors while the corresponding sales and cost of sales are reflected on a net basis within Net sales.

Financing Activities Net cash used in financing activities decreased $3 million in 2023 compared to 2022. The decrease was primarily driven by lower repayments on long-term debt, partially offset by share repurchases in 2023 with no similar activity in 2022, decreased activity within our inventory financing arrangements and increased dividend payments. For additional information regarding the inventory financing and debt activities, see Note 7 (Inventory Financing Agreements) and Note 9 (Debt) to the accompanying Consolidated Financial Statements. 34

•rank equal in right of payment with all of the Issuers' and the Guarantors' existing and future unsecured senior debt. The following tables set forth Balance Sheet information as of December 31, 2023 and December 31, 2022, and Statement of Operations information for the years ended December 31, 2023 and 2022 for the accounts of the Issuers and the accounts of the Guarantors (the "Obligor Group"). The financial information of the Obligor Group is presented on a combined basis and the intercompany balances and transactions between the Obligor Group have been eliminated.

Operating income1,507.3 1,584.7 Net income945.6 1,005.8 Commitments and Contingencies The information set forth in Note 16 (Commitments and Contingencies) to the accompanying Consolidated Financial Statements included in Part II, Item 8 of this report is incorporated herein by reference. 35

Goodwill Goodwill is allocated to reporting units expected to benefit from the business combination. Goodwill is subject to periodic testing for impairment at the reporting unit level on an annual basis during the fourth quarter, or more frequently if events or changes in circumstances indicate that the asset may be impaired. These events or circumstances could include a significant change in the business climate, legal factors, operating performance indicators, competition or sale or disposition of a significant portion of a reporting unit. We may elect to utilize a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. As part of our qualitative assessment, judgment is required in weighing the effect of various positive and negative factors that may affect the fair value. We consider various factors, including the excess of fair value over carrying value from the last quantitative test, macroeconomic conditions, industry and market considerations, the projected financial performance and actual financial performance compared to prior year projected financial performance. If we elect to bypass the qualitative assessment, or if indicators of impairment exist, a quantitative impairment test is performed. As part of the quantitative assessment, application of the goodwill impairment test requires judgment, including the identification of reporting units, assignment of assets and liabilities to reporting units and determination of the fair value of each reporting unit. Fair value of a reporting unit is determined by using a weighted combination of an income approach and a market approach, as this combination is considered the most indicative of our fair value in an orderly transaction between market participants. This analysis requires significant judgments, including estimation of future cash flows, which is dependent on internal forecasts, estimation of the long-term rate of growth for our business, estimation of the useful life over which cash flows will occur, determination of our weighted average cost of capital, future market conditions and profitability of future business strategies. The estimates used to calculate the fair value of a reporting unit change from year to year based on operating results, market conditions and other factors. Changes in these estimates and assumptions could materially affect the determination of fair value and goodwill impairment for each reporting unit. However, our past estimates of fair value would not have indicated an impairment when revised to include subsequent years' actual results. We completed our annual impairment analysis during the fourth quarter of 2023. We performed a quantitative analysis for all reporting units and determined that the fair values of each reporting unit substantially exceeded their carrying values and, therefore, no impairment existed.

•purchase, sell, ship and invoice our hardware and software products and provide and invoice our services efficiently and on a timely basis; and •maintain our cost-efficient operating model while scaling our business. Our information technology systems are inherently exposed to varied technological threats beyond our control. While we have taken steps to protect our information technology systems from a variety of threats, both internal and external, and from human error, there can be no guarantee that those steps will be effective. Furthermore, although we have redundant systems at a separate location to back up our primary systems, there can be no assurance that these redundant systems will operate properly if and when required. Moreover, software vulnerabilities within the third-party information technology systems we use are discovered and reported on nearly a daily basis. When made public or otherwise known to us, we attempt to remediate or mitigate these vulnerabilities following guidance provided by the software vendor, and/or appropriate authorities, and before the vulnerability is successfully used in a cyberattack against our systems. If and when cyberattacks target and successfully exploit these vulnerabilities, we take steps designed to contain and limit the impact on our business. Any disruption to or infiltration of our information technology systems could significantly harm our reputation, business and results of operations due to failure to comply with customer, partner, legal or regulatory obligations. We maintain and periodically upgrade many of our information technology systems, some of which are complex, costly and time consuming. If our information technology systems are not properly maintained or enhanced, the attention of our coworkers could be diverted and our ability to provide the level of service our customers demand could be constrained for some time. Further, new information technology systems and updates to existing information technology systems may not properly integrate with other information technology systems. Also, once implemented, the new information technology systems, updates to existing information technology systems and related technology may not provide the intended efficiencies or anticipated benefits, or could be defective or improperly installed, and could add costs, complications and disruptions to our ongoing operations. From time to time, we may acquire new companies, businesses or sites with cybersecurity and data protection systems which may not conform with our standards. It may require significant time and expense to upgrade and integrate such systems and controls, and if we are unable to do so in a timely manner, or at all, failures or breaches of such systems could harm our reputation, business and results of operations due to failure to comply with customer, partner, legal or regulatory obligations.

Our success is heavily dependent upon our ability to attract, develop, engage and retain key personnel to manage, lead, innovate and grow our business, including our key executive, management, sales, services and technical coworkers. Additionally, we rely on outsource partners to execute and deliver on certain functions within the organization. Our future success will depend to a significant extent on the efforts of our leadership team, as well as the effectiveness of our succession planning and efforts to develop and promote top talent. Our future success also will depend on our ability to retain and motivate our customer-facing coworkers, who have been given critical CDW knowledge regarding, and the opportunity to develop strong relationships with, many of our customers. In addition, as we seek to expand our offerings of value-added services and solutions, our success will even more heavily depend on attracting and retaining highly skilled technology specialists and engineers, for whom the market is extremely competitive. In order to attract, retain and motivate key personnel in a competitive marketplace, it is important to provide a competitive compensation package. If our compensation package is not viewed as being competitive, our ability to attract, retain and motivate key personnel could be adversely affected. Additionally, as minimum wage rates increase or related laws and regulations change, we have and may need to continue to increase not only the wage rates of our minimum wage coworkers, but also the wages paid to our other hourly or salaried coworkers. We could experience work stoppages, strikes or performance issues with our outsource partners, which could adversely affect our business, results of operations or cash flows. In addition, a sustained labor shortage or increased turnover rates within our coworker base could lead to increased costs, such as increased overtime to meet demand and increased wage rates to attract and retain coworkers, and could adversely affect our business, results of operations or cash flows. Additionally, if we fail to effectively manage our workforce, we may need to terminate or reposition coworkers within our Company to eliminate an abundance of or to reconfigure resources, which could damage our coworker relations and our ability to attract and retain key personnel. 13 If we are unable to attract, develop, engage and retain key personnel, or if our approach to workforce management is ineffective, our relationships with our vendor partners and customers and our ability to expand our offerings of value-added services and solutions could be adversely affected. Moreover, if we are unable to continue to train our sales, services and technical personnel effectively to meet the rapidly changing technology needs of our customers, the overall quality and efficiency of such personnel could decrease. Such consequences could adversely affect our business, results of operations or cash flows.

We could be exposed to additional risks if we continue to make strategic investments or acquisitions or enter into alliances. We may continue to pursue transactions, including strategic investments, acquisitions or alliances, in an effort to extend or complement our existing business. These types of transactions involve numerous business risks, including finding suitable transaction partners and negotiating terms that are acceptable to us, the diversion of management's attention from other business concerns, extending our product or service offerings into areas in which we have limited experience, entering into new geographic markets, the potential loss of key coworkers or business relationships and successfully integrating acquired businesses. There can be no assurance that the intended benefits of our investments, acquisitions and alliances will be realized, or that those benefits will offset these numerous risks or other unforeseen factors, any of which could adversely affect our business, results of operations or cash flows. In addition, our financial results could be adversely affected by financial adjustments required by generally accepted accounting principles in the United States of America ("US GAAP") in connection with these types of transactions, including the Sirius Acquisition, where significant goodwill or intangible assets are recorded. To the extent the value of goodwill or identifiable intangible assets becomes impaired, we may be required to incur material charges relating to the impairment of those assets. Our future operating results may fluctuate significantly, which may result in volatility in the market price of our stock and could impact our ability to operate our business effectively. We may experience significant variations in our future quarterly results of operations. These fluctuations may cause the market price of our common stock to be volatile and may result from many factors, including the condition of the technology industry in general, shifts in demand and pricing for hardware, software and services, the introduction of new products or upgrades. Further, if our customers' businesses are adversely affected by global or regional economic conditions such as cost inflation or rising interest rates, they may delay or reduce purchases from us, which could adversely affect our results of operations. Our operating results are also highly dependent on Gross profit as a percentage of Net sales. Our Gross profit percentage fluctuates due to numerous factors, some of which may be outside of our control, including general macroeconomic conditions including inflation; pricing pressures; changes in product costs from our vendor partners; the availability of price protection, purchase discounts and incentive programs from our vendor partners; changes in product, order size and customer mix; the risk of some items in our inventory becoming obsolete; increases in product and delivery costs that we cannot pass on to customers; and general market and competitive conditions. In addition, our cost structure is based, in part, on anticipated sales and gross margins. Therefore, we may not be able to adjust our cost structure quickly enough to compensate for any unexpected sales or gross margin shortfall, and any such inability could have an adverse effect on our business, results of operations or cash flows.

•foreign currency fluctuations; and •restrictions on the transfer of funds. We cannot predict whether the countries in which the products we sell, or any components of those products, are purchased or manufactured will be subject to new or additional trade restrictions or sanctions imposed by the US or foreign governments, including the likelihood, type or effect of any such restrictions. Periods of intense diplomatic or armed conflict, such as the ongoing conflict in Ukraine, may result in new and rapidly evolving trade restrictions and sanctions. Trade restrictions, including new or increased tariffs or quotas, embargoes, sanctions, safeguards and customs restrictions against the products we sell, could increase the cost or reduce the supply of product available to us and adversely affect our business, results of operations or cash flows. In addition, our exports are subject to regulations, some of which may be inconsistent, and noncompliance with these requirements could have a negative effect on our business, results of operations or cash flows. Our financial performance could be adversely affected by decreases in spending on technology products and services by our public and private sector customers due to, among other things, customer spending decisions and government spending policies. Our sales are impacted by customer spending decisions on technology, including refresh decisions, customer initiatives that drive technology spending and customer budget priorities. Our sales to our public sector customers, and our other customers that do business with our public sector customers in particular, are impacted by government spending policies, budget priorities and revenue levels. An adverse change in government spending policies (such as budget cuts or limitations or temporary shutdowns of government operations), shifts in budget priorities or reductions in revenue levels, could cause our impacted public sector customers or our other customers that do business with impacted public sector customers to reduce or delay their purchases or to terminate or not renew their contracts with us, which could adversely affect our business, results of operations or cash flows. Additionally, such adverse change in government spending policies, shifts in budget priorities or reductions in revenue levels could impact cash collections from contracts with our impacted public sector customers or other customers that do business with impacted public sector customers, which could adversely affect our business, results of operations or cash flows. 16

•provide that our Board of Directors is expressly authorized to make, alter or repeal our amended and restated bylaws. In addition, we are subject to Section 203 of the Delaware General Corporation Law, which will prevent us from engaging in a business combination with a person who acquires at least 15% of our common stock for a period of three years from the date such person acquired such common stock, unless Board or stockholder approval is obtained prior to the acquisition. These anti-takeover provisions and other provisions under Delaware law could discourage, delay or prevent a transaction involving a change in control of the Company, even if doing so would benefit our stockholders. These provisions could also discourage proxy contests and make it more difficult for our stockholders to elect directors of their choosing and to cause us to take other corporate actions our stockholders desire. We cannot assure you that we will continue to pay dividends on our common stock or repurchase any of our common stock under our share repurchase program, and our indebtedness and certain tax considerations could limit our ability to continue to pay dividends on, or make share repurchases of, our common stock. If we do not continue to pay dividends, you may not receive any return on investment unless you are able to sell your common stock for a price greater than your purchase price. We expect to continue to pay a cash dividend on our common stock. However, any determination to pay dividends in the future will be at the discretion of our Board of Directors. Any determination to pay dividends on, or repurchase, shares of our common 20 stock in the future will depend upon our results of operations, financial condition, business prospects, capital requirements, contractual restrictions, any potential indebtedness we may incur, our target leverage ratio, restrictions imposed by applicable law, tax considerations and other factors our Board of Directors deems relevant. In addition, our ability to pay dividends on, or repurchase, shares of our common stock will be limited by restrictions on our ability to pay dividends or make distributions to our stockholders and on the ability of our subsidiaries to pay dividends or make distributions to us, in each case, under the terms of our current and any future agreements governing our indebtedness. There can be no assurance that we will continue to pay a dividend at the current rate or at all or that we will continue to repurchase shares of our common stock. If we do not pay dividends in the future, realization of a gain on your investment will depend entirely on the appreciation of the price of our common stock, which may never occur.

Business and Operational Risks Our business depends on our vendor partner relationships and the terms of the agreements governing those relationships. Our solutions portfolio includes products and services from OEMs, software publishers and cloud providers. We are authorized by these vendor partners to sell all or some of their products and services via direct marketing activities. Our authorization with each vendor partner is subject to specific terms and conditions regarding such things as sales channel restrictions, product return privileges, services performance commitments, price protection policies, purchase discounts and vendor partner programs and funding, including purchase rebates, sales volume rebates, purchasing incentives and cooperative advertising reimbursements. However, we do not have any long-term contracts with our vendor partners and many of these arrangements are terminable upon notice by either party. A reduction in vendor partner programs or funding or our failure to timely react to changes in vendor partner programs or funding could have an adverse effect on our business, results of operations or cash flows. In addition, a reduction in the amount or a change in the terms of credit granted to us by our vendor partners could increase our need for, and the cost of, working capital and could have an adverse effect on our business, results of operations or cash flows. From time to time, vendor partners may terminate or limit our right to sell some or all of their products or change the terms and conditions or reduce or discontinue the incentives that they offer us. For example, there is no assurance that, as our vendor partners continue to sell directly to end users and through resellers, they will not limit or curtail the availability of their products to solutions providers like us. Any such termination or limitation or the implementation of such changes could have a negative impact on our business, results of operations or cash flows. We purchase the products included in our portfolio both directly from our vendor partners and from wholesale distributors. A significant portion of our sales are derived from products manufactured by Apple, Cisco, Dell EMC, HP Inc., Lenovo and Microsoft. In addition, purchases from two wholesale distributors, Ingram Micro and TD SYNNEX, represent over 25% of our total purchases. The loss of, or change in business relationship with, any of these or any other wholesale distributors or key vendor partners, or the diminished availability of their products, including due to backlogs for their products, could reduce the supply and impact the cost of products we sell and negatively impact our competitive position. Further, the sale, spin-off or combination of any of our wholesale distributors or key vendor partners and/or certain of their business units, including any such sale to or combination with a vendor with whom we do not currently have a commercial relationship or whose products we do not sell, or our inability to develop relationships with new and emerging vendors and vendors that we have not historically represented in the marketplace, could have an adverse impact on our business, results of operations or cash flows. Our sales are dependent on continued innovations in technology by our vendor partners and the competitiveness of their offerings, and our ability to partner with new and emerging technology providers. The technology industry is characterized by rapid innovation and the frequent introduction of new and enhanced hardware, software and services, such as cloud-based and other "as a service" solutions. We have been and will continue to be dependent on innovations in technology, as well as the adoption of those innovations by customers. Also, customers may delay spending while they evaluate new technologies. A decrease in the rate of innovation, a lack of adoption of innovations by our customers or delays in technology spending by our customers, could have an adverse effect on our business, results of operations or cash flows. In addition, if we are unable to anticipate and expand our capabilities to keep pace with changes in technology and new hardware, software and services, for example by providing the appropriate training to our account managers, technology specialists and engineers to enable them to effectively sell and deliver such new offerings to customers, our business, results of operations or cash flows could be adversely affected. We also are dependent upon our vendor partners for the development and marketing of hardware, software and services to compete effectively with hardware, software and services of vendors whose products and services we do not currently offer or that we are not authorized to offer in one or more customer channels. To the extent that a vendor's offering that is in high demand is not available to us for resale in one or more customer channels, and there is not a competitive offering from another

We are party to various legal proceedings that arise in the ordinary course of our business, which include commercial, employment, tort and other litigation. We are also subject to intellectual property infringement claims against us in the ordinary course of our business, either because of the products and services we sell or the business systems and processes we use to sell such products and services, in the form of cease-and-desist letters, licensing inquiries, lawsuits and other communications and demands. In our industry, such intellectual property claims have become more frequent as the complexity of technological products and the intensity of competition in our industry have increased. Increasingly, many of these assertions are brought by non-practicing entities whose principal business model is to secure patent licensing revenue, but we may also be subject to demands from inventors, competitors or other patent holders who may seek licensing revenue, lost profits and/or an injunction preventing us from engaging in certain activities, including selling certain products or services. In addition, we are subject to proceedings, investigations and audits by federal, state, international, national, provincial and local authorities, including as a result of our significant sales to governmental entities. For example, a subsidiary of the Company received a Civil Investigative Demand dated September 20, 2021 from the US Department of Justice ("DOJ") in connection with a False Claims Act investigation. The DOJ has requested information related to teaming agreements with OEMs. We also are subject to audits by various partners, group purchasing organizations and customers, including government agencies, relating to purchases and sales under various contracts. In addition, we are subject to indemnification claims under various contracts. Current and future litigation, infringement claims, governmental proceedings and investigations, audits or indemnification claims that we face may result in substantial costs and expenses and significantly divert the attention of our management regardless of the outcome. In addition, these matters could lead to increased costs or interruptions of our normal business operations. Litigation, infringement claims, governmental proceedings and investigations, audits or indemnification claims involve uncertainties and the eventual outcome of any such matter could adversely affect our business, results of operations or cash flows. Failure to comply with complex and evolving laws and regulations applicable to our operations or failure to meet stakeholder expectations on environmental sustainability and corporate responsibility matters could adversely affect our business, results of operations or cash flows. Our global operations span a variety of legal regimes, subjecting us to numerous complex, diverse, evolving and at times potentially inconsistent laws and regulations in a number of areas, including labor and employment, advertising, e-commerce, tax, trade, import and export controls, economic and trade sanctions, anti-corruption, data privacy and security requirements, competition, climate, environmental and health and safety. The evaluation of and compliance with these laws, regulations and similar requirements may be onerous and expensive, and may have other adverse impacts on our business, results of operations or cash flows, the risk of which will be heightened as we expand the products and services we offer, expand into new markets and channels and expand internationally. For example, we may be subject to increased costs and use of operational resources associated with complying with any new climate-related laws and regulations. We have implemented policies and procedures designed to help ensure compliance with applicable laws and regulations, but there can be no guarantee against coworkers, contractors or agents violating such laws and regulations or our policies and procedures. Additionally, there is increased focus by stakeholders on environmental sustainability and corporate responsibility matters, and stakeholders may disagree with the Company's commitments and initiatives on such matters. Our disclosure on 17 these matters and our failure, or perceived failure, to meet our commitments (including with respect to climate change) or otherwise effectively address these matters may erode customer trust or confidence, particularly if they receive considerable publicity or result in litigation, and could have a negative impact on our business. As a public company, we also are subject to increasingly complex public disclosure, corporate governance and accounting requirements that increase compliance costs and require significant management focus.

•could elect to declare all borrowings outstanding thereunder, together with accrued and unpaid interest and fees, to be due and payable; or •could require us to apply all of our available cash to repay these borrowings. 18

Risks Related to Ownership of Our Common Stock Our common stock price may be volatile and may decline regardless of our operating performance, and holders of our common stock could lose a significant portion of their investment. The market price for our common stock may be volatile. Our stockholders may not be able to resell their shares of common stock at or above the price at which they purchased such shares, due to fluctuations in the market price of our common stock, which may be caused by a number of factors, many of which we cannot control, including the risk factors described in this Annual Report on Form 10-K and the following: •changes in financial estimates by any securities analysts who follow our common stock, our failure to meet these estimates or failure of securities analysts to maintain coverage of our common stock; •downgrades by any securities analysts who follow our common stock; •future sales of our common stock by our officers, directors and significant stockholders; •market conditions or trends in our industry or the economy as a whole including market expectations of changes in interest rates; •investors' perceptions of our prospects;

Anti-takeover provisions in our charter documents and Delaware law might discourage or delay acquisition attempts for us that may be considered favorable. Our amended and restated certificate of incorporation and amended and restated bylaws contain provisions that may make the acquisition of the Company more difficult without the approval of our Board of Directors. These provisions: •authorize the issuance of undesignated preferred stock, the terms of which may be established and the shares of which may be issued without stockholder approval, and which may include super voting, special approval, dividend, or other rights or preferences superior to the rights of the holders of common stock; •generally prohibit stockholder action by written consent, requiring all stockholder actions be taken at a meeting of our stockholders; •provide that special meetings of the stockholders can only be called in accordance with certain requirements and limitations set forth in our amended and restated bylaws; •establish advance notice requirements for nominations for elections to our Board of Directors or for proposing matters that can be acted upon by stockholders at stockholder meetings; and

Breaches of data security and the failure to protect our information technology systems from cybersecurity threats could adversely impact our business. Our business involves the handling, storage and transmission of proprietary information and sensitive or confidential data, including personal information of coworkers, customers, partners and others, which we must do in compliance with applicable law. In connection with our services business, some of our coworkers have access to our customers' confidential data and other information. Additionally, third parties, such as data center colocation and hosted solution partners, provide services to us and also provide services as a component of our services delivery to customers and to customer systems. These third parties or others that are a part of our supply chain could also be a source of security risk in the event of a failure to protect their own products, security systems and infrastructure and we may not be able to control the manner in which these third parties respond to any security breach. We have privacy and data security policies, practices and controls in place that are designed to prevent security breaches; however, as newer technologies evolve, as more business is conducted over the internet and remotely, as we acquire more business operations from targets with differing or inadequate cybersecurity and data protection controls and as the portfolio of the service providers we exchange confidential information, software and/or hardware with expands, we have been subject to breaches in security and are increasingly likely to be exposed to risks from breaches in security, including those arising from human error, negligence or mismanagement or from illegal or fraudulent acts, such as cyberattacks. We, and some third parties upon which we rely, regularly experience malicious attacks and other attempts to gain unauthorized access to our systems, and attacks against us by state-sponsored organizations and nation-states may increase during periods of intense diplomatic or armed conflicts. Further, security breaches may go undetected and persist in our environments for extended periods. Although we have not experienced a material security breach to date, the evolving and escalating nature of cybersecurity threats, in light of new and sophisticated methods used by criminals and cyberterrorists, state-sponsored 12 organizations and nation-states, including computer viruses, malware, ransomware, phishing, misrepresentation, social engineering and forgery, make it increasingly challenging to anticipate, detect and defend against these threats. We and our third-party partners have implemented various security controls to meet compliance and privacy requirements while defending against these evolving security threats. However, breaches in security could expose us, our supply chain, our customers or other individuals to significant disruptions and a risk of public disclosure, loss or misuse of confidential data. Security breaches could result in legal claims or proceedings, liability or regulatory penalties under laws protecting the privacy of personal information (including those under the European Union General Data Protection Regulation and the California Privacy Rights Act), significant remediation costs as well as the loss of partners and existing or potential customers and, ultimately, damage to our brand and reputation and adversely impact our business. While we maintain insurance coverages that are intended to address certain aspects of data security, such insurance may be insufficient to cover all losses or all types of claims that may arise, and may not continue to be available to us on economically reasonable terms or at all. Moreover, media or other reports of perceived vulnerabilities in our network security or perceived lack of security within our environment, even if inaccurate, could materially adversely impact our reputation and business. The cost and operational consequences of implementing further data protection measures could also be material. Such breaches, costs and consequences could adversely affect our business, results of operations or cash flows. If we or our third-party service providers fail to provide high-quality services to our customers, our reputation, brand, business, results of operations or cash flows could be adversely affected. Our services include professional services, managed services, warranties, configuration services, partner services and telecom services. Additionally, we deliver and manage mission critical software, systems and network solutions for our customers. We also offer certain services, such as implementation and installation services and repair services, to our customers through various third-party service providers engaged to perform these services on our behalf. If we or our third-party service providers fail to provide high-quality services to our customers or such services result in an unplanned disruption of our customers' businesses, this could, among other things, result in legal claims and proceedings and liability for us. Moreover, as we expand our services and solutions business and provide increasingly complex services and solutions, we may be exposed to additional operational, regulatory and other risks. We also could incur liability for failure to comply with the rules and regulations applicable to the new services and solutions we provide to our customers. If any of the foregoing were to occur, our reputation with our customers, our brand and our business, results of operations or cash flows could be adversely affected. If we lose any of our key personnel, are unable to attract and retain the talent required for our business, our labor costs significantly increase or our approach to workforce management, inclusive of outsourcing, is ineffective, our business could be disrupted and our financial performance could suffer.

A natural disaster or other adverse occurrence at one of our primary facilities or a third-party provider location could damage our business. If the warehouse and distribution equipment or operations at one of our distribution centers were to be seriously damaged or disrupted by a natural disaster, which may increase in number or severity as a result of climate change, or other adverse occurrence, including disruption related to political or social unrest, we could utilize another distribution center or third-party distributors to ship products to our customers. However, this may not be sufficient to avoid interruptions in our service and may not enable us to meet all of the needs of our customers and would cause us to incur incremental operating costs. In addition, we operate numerous facilities which may contain both business-critical data and confidential information of our customers and third parties, such as data center colocation, managed services sites and hosted solution partners, and third parties provide services as a component of our services delivery to customers. A natural disaster or other adverse occurrence at any of our major data storage locations, managed services sites or third-party provider locations could negatively impact our business, results of operations or cash flows.

Item 1. Business Our Company CDW Corporation (together with its subsidiaries, the "Company," "CDW" or "we"), a Fortune 500 company and member of the S&P 500 Index, is a leading multi-brand provider of information technology ("IT") solutions to small, medium and large business, government, education and healthcare customers in the United States ("US"), the United Kingdom ("UK") and Canada. Our broad array of offerings ranges from discrete hardware and software products to integrated IT solutions and services that include on-premise and cloud capabilities across hybrid infrastructure, digital experience and security. On December 1, 2021, we completed our previously announced acquisition of Sirius Computer Solutions, Inc. ("Sirius"). This strategic acquisition has enhanced our services and solutions capabilities in key areas, including hybrid infrastructure, security, digital and data innovation, and cloud and managed services, as well as added services scale, further balancing and diversifying our portfolio mix. The addition of Sirius strengthens our role as the trusted technology advisor to our customers, with the expertise and portfolio breadth, depth and scale to orchestrate complete customer-centric solutions. We are vendor, technology and consumption model "agnostic", offering a broad selection of products and multi-branded IT solutions. Our solutions are delivered in physical, virtual and cloud-based environments through approximately 10,600 customer-facing coworkers, including sellers, highly-skilled technology specialists and advanced service delivery engineers. We are a leading sales channel partner for many original equipment manufacturers ("OEMs"), software publishers and cloud providers (collectively, our "vendor partners"), whose products we sell or include in the solutions we offer. We provide our vendor partners with a cost-effective way to reach customers and deliver a consistent brand experience through our established end-market coverage, technical expertise and extensive customer access. We simplify the complexities of technology solutions across design, selection, procurement, integration and management for our customers. Our goal is to have our customers, regardless of their size, view us as a trusted adviser and extension of their IT resources. Our multi-brand offering approach across our vendor partners enables us to provide the solutions and services that best address each customer's specific requirements to enable their desired business outcomes. We have capabilities to provide integrated IT solutions in more than 150 countries for customers with primary locations in the US, UK and Canada, which are large and growing markets. According to the International Data Corporation ("IDC"), the total US, UK and Canadian IT market generated approximately $1.4 trillion in sales in 2022. We believe our addressable markets in the US, UK and Canada represent approximately $460 billion in annual sales. These are highly fragmented markets served by thousands of IT resellers and solutions providers. For the year ended December 31, 2022, we estimate that our total Net sales of $23.7 billion represented approximately 5% of our addressable markets. We believe that demand for IT will continue to outpace general economic growth in the markets we serve, fueled by new technologies, including hybrid and cloud computing, virtualization and mobility as well as growing end-user demand for security, efficiency and productivity.

Other(2) 112.8 0.5 130.8 0.6 122.7 0.5 Total Net sales$21,376.0 100.0 %$23,748.7 100.0 %$20,820.8 100.0 % (1)Certain software and services revenue is recorded on a net basis for accounting purposes. As a result, the category percentage of Net sales is not representative of the category percentage of gross profits.

Our Internal Capabilities Human Capital Management Our culture is reflected through our coworkers, who are driven to serve our customers, our partners, our communities and all our stakeholders. We provide our coworkers with diverse experiences, engagement opportunities, strong training and development, competitive compensation and meaningful careers, which creates a high-performance culture that is central to CDW's success. We know that an inclusive environment produces the best ideas, and our coworkers are driven to finding the best technology solutions to enable the mission-driven needs of our customers. We have approximately 15,100 coworkers across the globe, with 11,700 coworkers in the US and 3,400 coworkers in international locations. More than 50% of our US Net sales are generated by account managers who have more than seven years of tenure with CDW. Our coworker relations are strong, and none of our coworkers are represented by a labor union or covered by a collective bargaining agreement.

Coworker Engagement We strive to create a culture of collaboration, belonging and individual growth and reward. Our coworker engagement strategy utilizes periodic surveys as well as virtual listening groups to gain a real-time understanding of the coworker experience at CDW. As a result of our coworkers' consistent engagement, we have garnered meaningful feedback and recommendations, which have led to measurable and impactful results.

Training & Development We focus on skills enhancement, leadership development, innovation excellence and professional growth throughout our coworkers' careers. Our programs include, but are not limited to: leadership development trainings, unique developmental opportunities for our high-potential emerging leaders, a robust training program for new sales coworkers, technical skill development training, a 12-month apprentice-style program for aspiring engineers and coworker access to over 20,000 on-demand educational modules with new content updated frequently.

Marketing We market the CDW brand to US, UK and Canadian audiences through various channels, including mass media, digital, print, social media and other emerging channels. We target current and prospective customers through integrated marketing programs including email, display ads, paid search, social media, events and sponsorships. These programs are supported by integrated communication efforts targeting technology decision-makers, influencers and the general public using a combination of expert technology articles, videos, case studies, media interviews and speaking events. As a result of our relationships with vendor partners, a significant portion of our advertising and marketing expenses is reimbursed through cooperative advertising programs. These programs are at the discretion of our vendor partners and are typically tied to sales or other commitments to be met by us within a specified period. We believe that our results and analytical techniques for measuring marketing efficacy differentiates us from our competitors.

●Solutions across IT lifecycle●Customer relationships driving insight into technology roadmaps Customers We provide integrated IT solutions to over 250,000 small, medium and large business, government, education and healthcare customers throughout the US, UK and Canada. We serve our customers through sales teams focused on customer end-markets that are supported by technical specialists and highly-skilled service delivery engineers. Our market segmentation allows us to customize our offerings and to provide enhanced expertise in designing and implementing IT solutions that meet our customer's specific needs. We have three reportable segments: Corporate, Small Business and Public. Our Corporate segment primarily serves US private sector business customers with more than 250 employees. Our Small Business segment primarily serves US private sector business customers with up to 250 employees. Our Public segment is comprised of government agencies and education and healthcare institutions in the US. We also have two other operating segments: CDW UK and CDW Canada, each of which do not meet the reportable segment quantitative thresholds and, accordingly, are included in an all other category ("Other"). In our US business, which represents approximately 90% of our Net sales, we currently have five dedicated customer channels: corporate, small business, government, education and healthcare, each of which generated approximately $1.6 billion or greater in Net sales in 2023. Net sales to customers in the UK and Canada combined generated $2.6 billion in 2023. We believe this diversity of customer end-markets provides us with multiple avenues for growth and has been a key factor in our ability to weather economic and technology cycles and continue to gain market share.

Partners We provide more than 100,000 products and services from more than 1,000 vendor partners, including well-established companies such as Adobe, APC, Apple, Cisco, Dell EMC, Google, Hewlett Packard Enterprise, HP Inc., IBM, Intel, Lenovo, Microsoft, NetApp, Nutanix, Palo Alto Networks, Pure Storage, Samsung and VMware, as well as from emerging technology companies to expand our portfolio. This broad portfolio of vendor partners and technologies enables us to offer customers significant options and meet customer demand for the products and solutions that best meet their needs. We believe our value proposition to vendor partners enables us to evolve our offering as new technologies emerge and new companies seek us as a channel partner. In 2023, we generated $2.0 billion of Net sales from each of our three largest vendor partners. We have received the highest level of certification from major vendor partners such as Cisco, Dell EMC, Hewlett Packard Enterprise, IBM, Microsoft, NetApp, Nutanix, Palo Alto Networks, Samsung and VMware which reflects the extensive product and solution knowledge and capabilities that we bring to our customers' IT challenges. These certifications also provide us with access to favorable pricing, tools and resources, including vendor incentive programs, which we use to provide additional value to our customers. Our vendor partners also regularly recognize us with top awards and select us to develop and grow new customer solutions.

Inventory Management We operate two distribution centers in North America and one distribution center in the UK which combined are more than 1 million square feet in size. Leveraging our distribution and logistics capabilities, we handle and ship approximately 35 million units annually on an aggregate basis from our distribution centers. We also have drop-shipment arrangements with many of our OEMs and wholesale distributors, which permit us to offer products to our customers without having to take physical delivery at our distribution centers. These arrangements represented approximately 55% of total North America Net sales in 2023. We believe that the location of our distribution centers allows us to efficiently ship products to our customers and provide timely access to our principal distributors. We believe that our logistics and configuration capabilities delivered by our highly skilled and certified team enable us to customize technology for our customers to meet their unique needs.

We believe competitive sources of supply are available in substantially all of the product categories that we offer. Competition The market for technology products and services is highly competitive and subject to economic conditions and rapid technological changes. This competitive environment includes the ability to tailor specific solutions to customer needs, the quality and breadth of product and service offerings, knowledge and expertise of sales force, customer service, price, product availability, speed of delivery and credit availability. We face competition from resellers, direct manufacturers, large service providers, cloud providers, telecommunication companies, and to a lesser extent retailers. Smaller, local or regional value-added resellers typically focus on a single solution suite or portfolio of solutions from one or two vendor partners. We believe we are well positioned to compete within this marketplace due to our competitive advantages. We expect the competitive landscape to continue to evolve as new technologies are developed. While innovation can help our business as it creates new offerings for us to sell, it can also disrupt our business model and create new and stronger competitors. For additional information on the risks associated with competition, see "Item 1A. Risk Factors." We believe we have sustainable competitive advantages that differentiate us in the marketplace. We have built a strong sales organization and deep services and solutions capabilities over time and expect to continue to invest to enhance these capabilities. We believe the combination of our competitive advantages of scale, performance driven culture and enhanced capabilities will help drive sustainable, profitable growth for us today and in the future. Our scale enables us to have a national and international footprint, as well as invest in resources to meet specific customer end-market needs. Our sellers are organized around unique customer end-markets that are both vertically and geographically focused. Our scale enables our ability to invest in technical coworkers who work directly with our sellers to help customers implement increasingly complex IT solutions. We have cross-border relationships that enable us to serve the needs of our US, UK and Canadian-based customers in more than 150 countries. Our strong, execution-oriented culture is underpinned by our compensation system.