HF Sinclair Corp

(Former name or former address, if changed since last report)

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company☐

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Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On May 13, 2026, HF Sinclair Corporation (the “Company”) terminated the employment of Mr. Atanas Atanasov as Executive Vice President and Chief Financial Officer of the Company, effective immediately. If Mr. Atanasov meets the conditions of the Company’s Severance Pay Plan, he will receive the severance benefits to which he is entitled thereunder. For a description of the Company’s Severance Pay Plan, see “Executive Compensation-Potential Payments Upon Termination or Change in Control” in the Company’s definitive Proxy Statement filed with the Securities and Exchange Commission (the “SEC”) on March 31, 2026. As previously reported on the Company’s Annual Report on Form 10-K filed with the SEC on February 27, 2026, Mr. Atanasov has been on leave from his duties since February 24, 2026. As previously reported, effective February 24, 2026, the Board of Directors of the Company appointed Mr. Vivek Garg, the Company’s Vice President, Chief Accounting Officer and Controller, to serve as the Company’s acting Chief Financial Officer.