(Mark one)☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period endedMarch31, 2025 OR MURPHY USA INC. Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during thepreceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90days.☑Yes☐No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of RegulationS-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).☑Yes☐No Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerginggrowth company.See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of theExchange Act. Large accelerated filer☑Accelerated filer☐Non-accelerated filer☐Smaller reporting company☐Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revisedfinancial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ TABLE OF CONTENTS Part I – Financial Information Consolidated Balance Sheets as ofMarch31, 2025(unaudited) and December 31, 2024Consolidated Statements of Income for the threemonths endedMarch31, 2025and 2024(unaudited)Consolidated Statements of Comprehensive Income for the threemonths endedMarch31, 2025and 2024(unaudited)Consolidated Statements of Cash Flows for thethreemonths endedMarch31, 2025and 2024(unaudited)Consolidated Statements of Changes in Equity for the threemonths endedMarch31, 2025and 2024(unaudited)Notes to Consolidated Financial Statements (unaudited)Item 2.Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem 3. Quantitative and Qualitative Disclosures About Market Risk Part II – Other InformationItem 1. Legal ProceedingsItem 1A. Risk FactorsItem 2. Unregistered Sales of Equity Securities and Use of ProceedsItem 5. Other InformationItem 6. ExhibitsSignatures Note1 —Description of Business and Basis of Presentation Description of business— Murphy USA Inc. and its consolidated subsidiaries (“Murphy USA”, "we", "our", "us", or the “Company”)markets refined products through a network of retail gasoline stores and to unbranded wholesale customers. In addition, we operate non-fuel convenience stores in select markets. The Company owns and operates a chain of retail stores under the brand names ofMurphy USAand Murphy Express, most of which are located in close proximity to Walmart stores, and also has a mix of convenience stores with and without retail gasoline that operate under the brand name of QuickChek. At March31, 2025, the Company had a totalof1,761Company stores of which1,607were branded as Murphy and154were the QuickChek brand. The Company also has certain® Basis of Presentation— Murphy USA was incorporated in March 2013 and, in connection with its incorporation, Murphy USA issued100shares of common stock, par value $0.01per share, to Murphy Oil Corporation (“Murphy Oil”) for $1.00. On August 30, 2013,Murphy USA was separated from Murphy Oil through the distribution of100% of the common stock of Murphy USA to holders ofMurphy Oil stock.Murphy USA Inc., Murphy Oil USA, Inc. and certain of its subsidiaries operate on a calendar year basis, while theQuickChek subsidiary uses a weekly retail calendar where each quarter has 13 weeks. For the three month period ended March31, In preparing the financial statements of Murphy USA in conformity with accounting principles generally accepted in the United States,management has made a number of estimates and assumptions related to the reporting of assets, liabilities, revenues, expenses andthe disclosure of contingent assets and liabilities. Actual results may differ from these estimates. Interim Financial Information— The interim period financial information presented in these consolidated financial statements isunaudited and includes all known accruals and adjustments, in the opinion of management, necessary for a fair presentation of the These interim consolidated financial statements should be read together with our audited financial statements for the years endedDecember 31, 2024, 2023 and 2022, included in our Annual Report on Form 10-K (File No. 001-35914), as filed with the Securities Recently Issued Accounting Standards— In December 2023, the FASB issued ASU 2023-09, "Improvements to Income Tax Disclosures." This ASU intends to enhance incometaxdisclosures,under Topic 740,to a