HF Sinclair Corp

Evaluation of Disclosure Controls and Procedures

The Company’s management, with the participation of the principal executive officer and principal financial officer of the Company, evaluated the effectiveness of the design and operation of the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of December 31, 2024, the end of the period covered by this report. Based on such evaluation, the Company’s principal executive officer and principal financial officer have concluded that, as of December 31, 2024, the Company’s disclosure controls and procedures are effective to ensure that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the required time periods and are designed to ensure that information required to be disclosed in its reports is accumulated and communicated to the Company’s management, including the principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

Management’s Report on Internal Control over Financial Reporting

The management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is a process designed by, or under the supervision of, the Company’s principal executive officer and principal financial officer and effected by the Company’s Board of Directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. All internal control systems, no matter how well designed, have inherent limitations that may not prevent or detect all misstatements. Also, projections of any evaluation of effectiveness in future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

The Company’s management assessed the effectiveness of the Company’s internal control over financial reporting at December 31, 2024. In making this assessment, the Company’s management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated Framework 2013. Based upon its assessment, management concluded that, at December 31, 2024, the Company’s internal control over financial reporting was effective.

Ernst & Young LLP, an independent registered public accounting firm that audited the Company’s Consolidated Financial Statements at December 31, 2024 and the year then ended included in this Form 10-K, has issued an attestation report on the Company’s internal control over financial reporting, at December 31, 2024, which is included herein.

Changes in Internal Controls

Subject to the above, there were no changes in the Company’s internal control over financial reporting that occurred during the quarter ended December 31, 2024, that have materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.

See Item 8 for “Report of the Independent Registered Public Accounting Firm.”