Financial Analysis

Industrial Software Solutions On January 2, 2025, the Company acquired 100% of the equity securities of Industrial Software Solutions I, Inc. and Industrial Software Solutions ULC (collectively, ISS), an industrial automation consulting company, software distributor, and AVEVA Select Partner, for total cash consideration of $36.3 million, net of cash acquired. The assets acquired primarily included distribution agreement and customer relationship intangible assets, with fair values of $10.6 million and $5.0 million, respectively, with the excess of $20.1 million primarily allocated to goodwill in the Companys EES reportable segment. Ascent, LLC On December 5, 2024, through its wholly-owned subsidiary Anixter Inc., the Company acquired 100% of the equity securities of Ascent, LLC (Ascent). Headquartered in St. Louis, Missouri, Ascent is a provider of data center facility management services with more than 300 employees in the U.S. and Canada. Ascents expertise in engineering and design-build consultation services, in addition to daily site operations and critical facility intelligence software, extends the Companys suite of capabilities and solutions that serve the entire lifecycle of the data center. The Company funded the purchase price paid at closing with cash on hand as well as borrowings under its revolving credit facility. The total fair value of consideration transferred for the acquisition of Ascent consisted of the following: (In millions) Purchase price $ 185.0 Adju …

BusinessCombinationDisclosureTextBlock · excerpt; the full note is in the filing

From time to time, a number of lawsuits and claims have been or may be asserted against the Company relating to the conduct of its business, including litigation relating to commercial, product and employment matters. The outcome of any litigation cannot be predicted with certainty, and some lawsuits may be determined adversely to Wesco. However, management does not believe that the ultimate outcome of any such pending matters is likely to have a material adverse effect on Wescos financial condition or liquidity, although the resolution in any fiscal period of one or more of these matters may have a material adverse effect on Wescos results of operations for that period. As of December 31, 2025, the Company had $59.9 million in outstanding letters of credit and guarantees. …

CommitmentsAndContingenciesDisclosureTextBlock · excerpt; the full note is in the filing

The following table sets forth Wescos outstanding indebtedness: As of December 31, 2025 2024 (In millions) International lines of credit $ 5.6 $ 0.6 Accounts Receivable Securitization Facility 1,300.0 1,450.0 Revolving Credit Facility 581.5 525.0 6.000% Anixter Senior Notes due 2025 4.2 7.250% Senior Notes due 2028, less debt discount of $3.1 and $4.4 in 2025 and 2024, respectively 1,321.9 1,320.6 6.375% Senior Notes due 2029 900.0 900.0 6.625% Senior Notes due 2032 850.0 850.0 6.375% Senior Notes due 2033 800.0 Finance lease obligations 67.3 57.3 Total debt 5,826.3 5,107.7 Plus: Fair value adjustments to the Anixter Senior Notes 0.1 Less: Unamortized debt issuance costs (44.9) (42.8) Less: Short-term debt and current portion of long-term debt (25.0) (19.5) Total long-term debt $ 5,756.4 $ 5,045.5 International Lines of Credit Certain foreign subsidiaries of Wesco have entered into uncommitted lines of credit, some of which are overdraft facilities, to support local operations. The maximum borrowing limit varies by facility and ranges between $1.0 million and $12.0 million. The international lines of credit generally are renewable on an annual basis and certain facilities are fully and unconditionally guaranteed by Wesco Distribution, Inc. (Wesco Distribution). Accordingly, certain borrowings under these lines directly reduce availability under the Companys revolving credit facility. The applicable interest rate for borrowings under these lines of credit varies by country and …

DebtDisclosureTextBlock · excerpt; the full note is in the filing

The following table disaggregates Wescos net sales by geography for the periods presented: Year Ended December 31, (In millions) 2025 2024 2023 United States $ 17,390.9 $ 16,189.8 $ 16,609.1 Canada 3,185.2 2,940.1 2,968.2 Other International (1) 2,934.8 2,688.9 2,807.9 Total by geography (2) $ 23,510.9 $ 21,818.8 $ 22,385.2 (1) No individual countrys net sales are greater than 10% of total net sales. (2) Wesco attributes revenues from external customers to individual countries on the basis of point of sale. …

DisaggregationOfRevenueTableTextBlock · excerpt; the full note is in the filing

The Companys financial instruments primarily consist of cash and cash equivalents, accounts receivable, accounts payable, bank overdrafts, outstanding indebtedness, foreign currency forward contracts, and benefit plan assets. The fair value of the Companys benefit plan assets is disclosed in Note 13, Employee Benefit Plans and except for outstanding indebtedness and foreign currency forward contracts, the carrying value of the Companys other financial instruments approximates fair value. The Company uses a market approach to determine the fair value of its debt instruments, utilizing quoted prices in active markets, interest rates and other relevant information generated by market transactions involving similar instruments. Therefore, the inputs used to measure the fair value of the Companys debt instruments are classified as Level 2 within the fair value hierarchy. The carrying value of Wescos debt instruments with fixed interest rates was $3,871.9 million and $3,074.9 million as of December 31, 2025 and 2024, respectively. The estimated fair value of this debt was $4,004.2 million and $3,127.3 million as of December 31, 2025 and 2024, respectively. The reported carrying values of Wescos other debt instruments, including those with variable interest rates, approximated their fair values as of December 31, 2025 and 2024. The Company purchases foreign currency forward contracts to reduce the effect of fluctuations in foreign currency-denominated accounts on its earnings. The f …

FairValueDisclosuresTextBlock · excerpt; the full note is in the filing

6. GOODWILL AND INTANGIBLE ASSETS The following table sets forth the changes in the carrying value of goodwill by reportable segment for the periods presented: EES CSS UBS Total (In millions) Balance as of December 31, 2023 $ 838.1 $ 1,211.6 $ 1,212.6 $ 3,262.3 Adjustments to goodwill for acquisitions 4.7 147.2 151.9 Adjustments to goodwill for divestiture (58.1) (58.1) Foreign currency exchange rate changes (43.5) (11.8) (20.7) (76.0) Balance as of December 31, 2024 $ 799.3 $ 1,347.0 $ 1,133.8 $ 3,280.1 Adjustments to goodwill for acquisitions 20.1 (0.3) 19.8 Foreign currency exchange rate changes 24.4 7.4 11.7 43.5 Balance as of December 31, 2025 $ 843.8 $ 1,354.1 $ 1,145.5 $ 3,343.4 The components of intangible assets are as follows: December 31, 2025 December 31, 2024 Life (in years) Gross Carrying Amount (1) Accumulated Amortization (1) Net Carrying Amount Gross Carrying Amount (1) Accumulated Amortization (1) Net Carrying Amount (In millions) Intangible assets: Trademarks Indefinite $ 791.6 $ $ 791.6 $ 789.7 $ $ 789.7 Customer relationships 9 - 20 1,523.6 (570.2) 953.4 1,502.4 (476.4) 1,026.0 Distribution agreements 8 10.7 (1.3) 9.4 29.2 (27.7) 1.5 Trademarks 5 and 12 15.5 (14.0) 1.5 15.5 (11.7) 3.8 Software 7 16.0 (3.4) 12.6 16.0 (1.1) 14.9 Technology know-how 5 0.9 (0.2) 0.7 $ 2,358.3 $ (589.1) $ 1,769.2 $ 2,352.8 $ (516.9) $ 1,835.9 (1) Excludes the original cost and related accumulated amortization of fully-amortized intangible assets. Amortization expense related t …

GoodwillAndIntangibleAssetsDisclosureTextBlock · excerpt; the full note is in the filing

11. INCOME TAXES The following table sets forth the components of income before income taxes by jurisdiction: Year Ended December 31, 2025 2024 2023 (In millions) United States $ 625.2 $ 713.7 $ 739.4 Foreign 230.7 237.3 252.6 Income before income taxes $ 855.9 $ 951.0 $ 992.0 The following table sets forth the components of the provision for income taxes: Year Ended December 31, 2025 2024 2023 (In millions) Current income taxes: U.S. federal $ 85.8 $ 150.2 $ 124.8 State 38.6 41.5 34.6 Foreign 81.6 79.8 74.4 Total current income taxes 206.0 271.5 233.8 Deferred income taxes: U.S. federal 9.3 (22.8) (1.0) State 2.6 (5.0) 2.7 Foreign (4.5) (12.1) (9.6) Total deferred income taxes 7.4 (39.9) (7.9) Provision for income taxes $ 213.4 $ 231.6 $ 225.9 The following table sets forth the reconciliation of the tax provision at the U.S. federal statutory income tax rate to income tax expense and the effective tax rate for the year ended December 31, 2025: Year Ended December 31, 2025 (In millions) U.S. federal statutory tax rate $ 179.7 21.0 % State and local income taxes, net of federal income tax effect (1) 33.1 3.9 Foreign tax effects: Canada: Provincial income taxes 10.5 1.2 Statutory tax rate difference between Canada and United States (9.2) (1.1) Other (1.7) (0.2) Ireland 12.0 1.4 Other foreign jurisdictions 17.2 2.0 Effect of cross-border tax laws: Foreign-derived intangible income (11.7) (1.4) Global intangible low-taxed income 20.6 2.4 Other 3.0 0.3 Tax credits: Foreign tax cre …

IncomeTaxDisclosureTextBlock · excerpt; the full note is in the filing

8. LEASES Wesco leases substantially all of its real estate, as well as automobiles, trucks, information technology hardware, and other equipment under lease arrangements classified as operating and finance. The following table sets forth supplemental balance sheet information related to leases for the periods presented: As of December 31, (In millions) 2025 2024 Operating Leases Operating lease assets $ 888.3 $ 735.1 Current operating lease liabilities (1) 198.9 169.5 Noncurrent operating lease liabilities 752.2 614.8 Total operating lease liabilities $ 951.1 $ 784.3 Finance Leases Finance lease assets, net (1) $ 68.4 $ 57.8 Current finance lease liabilities (1) 19.4 15.1 Noncurrent finance lease liabilities (1) 47.9 42.2 Total finance lease liabilities $ 67.3 $ 57.3 (1) Current operating lease liabilities, finance lease assets, net, current finance lease liabilities and noncurrent finance lease liabilities are recorded as components of other current liabilities, property, buildings and equipment, net, short-term debt and current portion of long-term debt, and long-term debt, respectively, in the Consolidated Balance Sheets. The following table sets forth the Companys total lease cost for the periods presented: Year Ended December 31, (In millions) 2025 2024 2023 Operating lease cost $ 237.1 $ 223.6 $ 197.0 Variable lease cost 62.6 60.3 53.2 Short-term lease cost 7.9 6.9 8.9 Amortization of finance lease assets 19.6 15.4 9.2 Total lease cost $ 327.2 $ 306.2 $ 268.3 Operating …

LesseeOperatingLeasesTextBlock · excerpt; the full note is in the filing

Recently Adopted and Recently Issued Accounting Standards In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which enhances prior reportable segment disclosure requirements in part by requiring entities to disclose significant expenses related to their reportable segments. The amendments in this ASU were effective on a retrospective basis for annual periods beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Company adopted the annual disclosure requirements of this ASU in the fourth quarter of 2024 and the interim disclosure requirements in the first quarter of 2025. The adoption of this ASU resulted in additional required disclosures, including the disclosure of certain expenses at the reportable segment level, described further in Note 16, Business Segments. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires disaggregated information about a reporting entitys effective tax rate reconciliation as well as information on income taxes paid to enhance the transparency and decision usefulness of income tax disclosures. The amendments in this ASU are effective for annual periods beginning after December 15, 2024 on a prospective basis; however, retrospective application is permitted. The Company adopted this ASU on a prospective basis in the fourth quarter of 2025. The a …

NewAccountingPronouncementsPolicyPolicyTextBlock · excerpt; the full note is in the filing

Wesco distributes products and provides services to customers globally in various end markets within its business segments. The segments operate in the United States, Canada and various other countries. The following table disaggregates Wescos net sales by geography for the periods presented: Year Ended December 31, (In millions) 2025 2024 2023 United States $ 17,390.9 $ 16,189.8 $ 16,609.1 Canada 3,185.2 2,940.1 2,968.2 Other International (1) 2,934.8 2,688.9 2,807.9 Total by geography (2) $ 23,510.9 $ 21,818.8 $ 22,385.2 (1) No individual countrys net sales are greater than 10% of total net sales. (2) Wesco attributes revenues from external customers to individual countries on the basis of point of sale. Due to the terms of certain contractual arrangements, Wesco bills or receives payment from its customers in advance of satisfying the respective performance obligation. Such advance billings or payments are recorded as deferred revenue and recognized as revenue when the performance obligation has been satisfied and control has transferred to the customer, which is generally upon shipment. Revenue associated with these arrangements is generally recognized within a year or less from the date of the advance billing or payment receipt. At December 31, 2025 and 2024, $151.4 million and $141.8 million, respectively, of deferred revenue was recorded as a component of other current liabilities in the Consolidated Balance Sheets. The Company recognized $102.0 million, $76.9 million …

RevenueFromContractWithCustomerTextBlock · excerpt; the full note is in the filing

16. BUSINESS SEGMENTS The Company has operating segments comprising three strategic business units: EES, CSS and UBS. These operating segments are equivalent to the Companys reportable segments. The President and Chief Executive Officer serves as the Companys Chief Operating Decision Maker (CODM). The CODM allocates resources and evaluates the performance of the Companys reportable segments based on adjusted earnings before interest, taxes, depreciation and amortization (adjusted EBITDA), which is the Companys measure of segment profit or loss. The CODM considers budget-to-actual and year-over-year variances for net sales and adjusted EBITDA when making decisions about allocating resources to the segments. The Company incurs corporate costs primarily related to treasury, tax, information technology, legal and other centralized functions. The Company also has various corporate assets. Segment assets may not include jointly used assets, but segment results include depreciation expense or other allocations related to those assets. Interest expense and other non-operating items are either not allocated to the segments or reviewed on a segment basis. Corporate expenses and assets not directly identifiable with a reportable segment are reported in the tables below to reconcile the reportable segments to the consolidated financial statements. As previously described in Note 2, Accounting Policies, the reportable segment information for the years ended December 31, 2024 and 2023 for …

SegmentReportingDisclosureTextBlock · excerpt; the full note is in the filing

Basis of Presentation The consolidated financial statements include the accounts of Wesco International and all of its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Certain amounts as of December 31, 2025 and 2024 and for the years ended December 31, 2025, 2024 and 2023 in the consolidated financial statements and associated notes may not foot or recalculate due to rounding. Reclassifications The Consolidated Statements of Cash Flows for the years ended December 31, 2024 and 2023 include certain reclassifications to previously reported amounts to conform to the current periods presentation. Such reclassifications had no impact on the totals of operating, investing and financing cash flow activities for those years. In the first quarter of 2025, a portion of the EES reportable segment was moved to the CSS reportable segment as a result of operational realignment. The reportable segment financial information for the years ended December 31, 2024 and 2023 has been recast to conform to the current year presentation. The recast does not impact previously reported consolidated results. Refer to Note 16, Business Segments for the recasted segment disclosures. Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements an …

SignificantAccountingPoliciesTextBlock · excerpt; the full note is in the filing

Preferred Stock There are 20 million shares of preferred stock authorized at a par value of $0.01 per share; there are no shares issued or outstanding. The Companys Board of Directors has the authority, without further action by the stockholders, to issue all authorized preferred shares in one or more series and to fix the number of shares, designations, voting powers, preferences, optional and other special rights and the restrictions or qualifications thereof. The rights, preferences, privileges and powers of each series of preferred stock may differ with respect to dividend rates, liquidation values, voting rights, conversion rights, redemption provisions and other matters. Series A Preferred Stock The Companys Board of Directors authorized 25,000 shares of Series A Preferred Stock, with a liquidation preference of $25,000 per whole preferred share and a par value of $0.01 per share. Depositary shares, each representing a 1/1,000th interest in a share of Series A Preferred Stock, were registered under the Securities Act. The Company had issued 21,611,534 depositary shares, representing an interest in approximately 21,612 shares of Series A Preferred Stock. Holders of shares of the Series A Preferred Stock were entitled to receive, when, as and if declared by the Companys Board of Directors, cumulative cash dividends at an initial rate of 10.625% per annum of the $25,000 liquidation preference per share. Holders of the Series A Preferred Stock had limited voting rights, inc …

StockholdersEquityNoteDisclosureTextBlock · excerpt; the full note is in the filing

From time to time, a number of lawsuits and claims have been or may be asserted against the Company relating to the conduct of its business, including litigation relating to commercial, product and employment matters. The outcome of any litigation cannot be predicted with certainty, and some lawsuits may result in a negative impact to Wesco. However, management does not believe that the ultimate outcome of any such pending matters is likely to have a material adverse effect on Wescos financial condition or liquidity, although the resolution in any fiscal period of one or more of these matters may have a material adverse effect on Wescos results of operations for that period. Recoveries related to previously recognized losses are recorded when realization is probable. Recoveries in excess of recognized losses are deferred until realized or realizable. As of June 30, 2026, the Company has a loss contingency of approximately $49.0 million related to a matter in Other current liabilities, along with a corresponding insurance recovery receivable of $48.5 million in Other accounts receivable on the unaudited Condensed Consolidated Balance Sheet. As a result, the Company does not expect to incur a loss other than for the insurance deductible amount, which is not material to the unaudited Condensed Consolidated Financial Statements. On February 20, 2026, the U.S. Supreme Court ruled that tariffs previously imposed under the International Emergency Economic Powers Act (IEEPA) were inv …

CommitmentsAndContingenciesDisclosureTextBlock · excerpt; the full note is in the filing

8. DEBT The following table sets forth Wesco's outstanding indebtedness: As of June 30, 2026 December 31, 2025 (In millions) International lines of credit $ 2.1 $ 5.6 Accounts Receivable Securitization Facility 1,275.0 1,300.0 Revolving Credit Facility 578.9 581.5 7.250% Senior Notes due 2028, less debt discount of $3.1 in 2025 1,321.9 6.375% Senior Notes due 2029 900.0 900.0 5.250% Senior Notes due 2031 650.0 6.625% Senior Notes due 2032 850.0 850.0 6.375% Senior Notes due 2033 800.0 800.0 5.500% Senior Notes due 2034 850.0 Finance lease obligations 79.9 67.3 Total debt 5,985.9 5,826.3 Less: Unamortized debt issuance costs (49.8) (44.9) Less: Short-term debt and current portion of long-term debt (25.0) (25.0) Total long-term debt $ 5,911.1 $ 5,756.4 7.250% Senior Notes due 2028 On April 29, 2026, WESCO Distribution, Inc. (Wesco Distribution) exercised its right to redeem the entire outstanding $1,325 million aggregate principal amount of the 7.250% Senior Notes due 2028 (the 2028 Notes), and U.S. Bank Trust Company, National Association, as successor to U.S. Bank National Association, as trustee under the 2028 Notes Indenture, issued a notice of redemption to registered holders of the 2028 Notes. On June 15, 2026, Wesco Distribution redeemed the $1,325 million aggregate principal amount of the 2028 Notes at a redemption price equal to 100% of the principal amount plus accrued interest up to, but not including, June 15, 2026. The redemption of the 2028 Notes was funded throug …

DebtDisclosureTextBlock · excerpt; the full note is in the filing

The following table disaggregates Wescos Net sales by geography for the periods presented: Three Months Ended Six Months Ended June 30 June 30 (In millions) 2026 2025 2026 2025 United States $ 4,894.9 $ 4,386.9 $ 9,399.5 $ 8,361.5 Canada 872.2 804.0 1,699.3 1,516.8 Other International (1) 898.0 708.7 1,646.4 1,365.0 Total by geography (2) $ 6,665.1 $ 5,899.6 $ 12,745.2 $ 11,243.3 …

DisaggregationOfRevenueTableTextBlock · excerpt; the full note is in the filing

Wescos stock-based compensation awards consist of stock options, stock-settled stock appreciation rights, restricted stock units and performance-based awards. Compensation cost for all stock-based awards is measured at fair value on the date of grant and compensation cost is recognized, net of estimated forfeitures, over the service period for awards expected to vest. The fair value of stock options and stock-settled stock appreciation rights is determined using the Black-Scholes model. The fair value of restricted stock units is determined by the grant-date closing price of Wescos common stock. The fair value of performance-based awards with performance conditions is determined by a Monte Carlo simulation as well as the grant-date closing price of Wescos common stock. The forfeiture assumption is based on Wescos historical participant behavior that is reviewed on at least an annual basis. For stock options and stock-settled stock appreciation rights that are exercised, and for restricted stock units and performance-based awards that vest, shares are issued out of Wesco's outstanding common stock. Stock options and stock-settled stock appreciation rights vest ratably over a three-year period and terminate on the tenth anniversary of the grant date unless terminated sooner under certain conditions. Restricted stock units awarded under the WESCO International, Inc. 2021 Omnibus Incentive Plan, which was adopted on May 27, 2021, typically vest ratably over a three-year period on …

DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock · excerpt; the full note is in the filing

9. FAIR VALUE OF FINANCIAL INSTRUMENTS The Companys financial instruments primarily consist of cash and cash equivalents, accounts receivable, accounts payable, bank overdrafts, outstanding indebtedness, foreign currency forward contracts, and benefit plan assets. Except for benefit plan assets, outstanding indebtedness and foreign currency forward contracts, the carrying value of the Companys other financial instruments approximates fair value. The assets of the Companys various defined benefit plans primarily comprise common/collective/pool funds (i.e., mutual funds). These funds are valued at the net asset value (NAV) of shares held in the underlying funds. Investments for which fair value is measured using the NAV per share practical expedient are not classified in the fair value hierarchy. The Company uses a market approach to determine the fair value of its debt instruments, utilizing quoted prices in active markets, interest rates and other relevant information generated by market transactions involving similar instruments. Therefore, the inputs used to measure the fair value of the Companys debt instruments are classified as Level 2 within the fair value hierarchy. The carrying value of Wescos debt instruments with fixed interest rates was $4,050.0 million and $3,871.9 million as of June 30, 2026 and December 31, 2025, respectively. The estimated fair value of this debt was $4,104.0 million and $4,004.2 million as of June 30, 2026 and December 31, 2025, respectively. …

FairValueDisclosuresTextBlock · excerpt; the full note is in the filing

The following table sets forth the changes in the carrying value of goodwill by reportable segment, which correspond to our reporting units, for the period presented: EES CSS UBS Total (In millions) Beginning balance, January 1, 2026 $ 843.8 $ 1,354.1 $ 1,145.5 $ 3,343.4 Foreign currency exchange rate changes (18.0) (2.9) (8.5) (29.4) Ending balance, June 30, 2026 $ 825.8 $ 1,351.2 $ 1,137.0 $ 3,314.0 The components of intangible assets are as follows: As of June 30, 2026 December 31, 2025 Life (in years) Gross Carrying Amount (1) Accumulated Amortization (1) Net Carrying Amount Gross Carrying Amount (1) Accumulated Amortization (1) Net Carrying Amount Intangible assets: (In millions) Trademarks Indefinite $ 790.3 $ $ 790.3 $ 791.6 $ $ 791.6 Customer relationships 9 - 20 1,476.5 (566.0) 910.5 1,523.6 (570.2) 953.4 Distribution agreements 8 10.6 (2.0) 8.6 10.7 (1.3) 9.4 Trademarks 12 7.8 (7.2) 0.6 15.5 (14.0) 1.5 Software 7 16.0 (4.6) 11.4 16.0 (3.4) 12.6 Technology know-how 5 0.9 (0.3) 0.6 0.9 (0.2) 0.7 $ 2,302.1 $ (580.1) $ 1,722.0 $ 2,358.3 $ (589.1) $ 1,769.2 (1) Excludes the original cost and related accumulated amortization of fully-amortized intangible assets. Amortization expense related to intangible assets totaled $21.0 million and $22.3 million for the three months ended June 30, 2026 and 2025, respectively, and $42.8 million and $44.5 million for the six months ended June 30, 2026 and 2025, respectively. The following table sets forth the remaining estimated amorti …

GoodwillAndIntangibleAssetsDisclosureTextBlock · excerpt; the full note is in the filing

The effective tax rate for the three months ended June 30, 2026 and 2025 was 22.9% and 26.1%, respectively. For the three months ended June 30, 2026 and 2025, the effective tax rate reflects discrete income tax benefits of $14.7 million and $0.3 million, respectively, resulting from the exercise of stock-based awards. These discrete income tax benefits reduced the effective tax rates in the respective periods by approximately 5.4 and 0.1 percentage points. The effective tax rate for the six months ended June 30, 2026 and 2025 was 22.5% and 25.0%, respectively. For the six months ended June 30, 2026 and 2025, the effective tax rates reflect discrete income tax benefits of $22.5 million and $5.0 million, respectively, resulting from the exercise and vesting of stock-based awards. These discrete income tax benefits reduced the effective tax rates in the respective periods by approximately 4.8 and 1.3 percentage points. During the six months ended June 30, 2026 and 2025, the Company purchased $54.9 million and $54.4 million, respectively, of transferable clean energy tax credits to reduce its U.S. federal income tax liability. The Company has taken appropriate measures to mitigate the transferee liability associated with these tax credits, including, but not limited to, conducting due diligence to confirm the eligibility of the underlying projects or production, as applicable, for the tax credits and the eligibility of the tax credits for transfer, obtaining appropriate contractu …

IncomeTaxDisclosureTextBlock · excerpt; the full note is in the filing

3. REVENUE Wesco distributes products and provides services to customers globally in various end markets within its business segments. The segments operate in the United States, Canada and various other countries. The following table disaggregates Wescos Net sales by geography for the periods presented: Three Months Ended Six Months Ended June 30 June 30 (In millions) 2026 2025 2026 2025 United States $ 4,894.9 $ 4,386.9 $ 9,399.5 $ 8,361.5 Canada 872.2 804.0 1,699.3 1,516.8 Other International (1) 898.0 708.7 1,646.4 1,365.0 Total by geography (2) $ 6,665.1 $ 5,899.6 $ 12,745.2 $ 11,243.3 (1) No individual country's net sales are greater than 10% of total Net sales. (2) Wesco attributes revenues from external customers to individual countries on the basis of point of sale. Due to the terms of certain contractual arrangements, Wesco bills or receives payment from its customers in advance of satisfying the respective performance obligation. Such advance billings or payments are recorded as deferred revenue and recognized as revenue when the performance obligation has been satisfied and control has transferred to the customer, which is generally upon shipment. Revenue associated with these arrangements is generally recognized within a year or less from the date of the advance billing or payment receipt. At June 30, 2026, December 31, 2025 and December 31, 2024, $208.9 million, $151.4 million and $141.8 million, respectively, of deferred revenue was recorded as a component of Ot …

RevenueFromContractWithCustomerTextBlock · excerpt; the full note is in the filing

12. BUSINESS SEGMENTS The Company has operating segments comprising three strategic business units: EES, CSS and UBS. These operating segments are equivalent to the Companys reportable segments. The President and Chief Executive Officer serves as the Companys Chief Operating Decision Maker (CODM). The CODM evaluates the performance of the Companys reportable segments based on Adjusted earnings before interest, taxes, depreciation and amortization (Adjusted EBITDA), which is the Companys measure of segment profit or loss. The Company incurs corporate costs primarily related to treasury, tax, information technology, finance, legal and other centralized functions. The Company also has various corporate assets. Segment assets may not include jointly used assets, but segment results include allocations related to those assets. Interest expense and other non-operating items are either not allocated to the segments or reviewed on a segment basis. Corporate expenses and assets not directly identifiable with a reportable segment are reported in the tables below to reconcile the reportable segments to the Consolidated Financial Statements. …

SegmentReportingDisclosureTextBlock · excerpt; the full note is in the filing

Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements of Wesco have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities and Exchange Commission (the SEC). The unaudited condensed consolidated financial information should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in WESCO International, Inc.s Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the SEC on February 13, 2026. The Condensed Consolidated Balance Sheet at December 31, 2025 was derived from the audited Consolidated Financial Statements as of that date, but does not include all the disclosures required by accounting principles generally accepted in the United States of America. The unaudited Condensed Consolidated Balance Sheet as of June 30, 2026, the unaudited Condensed Consolidated Statements of Income and Comprehensive Income, the unaudited Condensed Consolidated Statements of Stockholders Equity for the three and six months ended June 30, 2026 and 2025, and the unaudited Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2026 and 2025, respectively, in the opinion of management, have been prepared on the same basis as the audited Consolidated Financial Statements and include all adjustments necessary for the fair statement of the results of the interim periods presented herein. All adjustments reflected in the unaudited condensed co …

SignificantAccountingPoliciesTextBlock · excerpt; the full note is in the filing