Other Events. On August 26, 2026, the Board of Directors of HF Sinclair Corporation (the “ Corporation ”) authorized a new $1.5 billion share repurchase program (the “ New Share Repurchase Program ”), effective August 26, 2026. The New Share Repurchase Program replaces all existing share repurchase authorizations, of which there was approximately $11 million remaining under the Corporation’s prior share repurchase program initially authorized in May 2024. Share repurchases under the New Share…

Entry into a Material Definitive Agreement. HF Sinclair Corporation (the “Company”) entered into a Stock Purchase Agreement, dated August 2, 2026 (the “Stock Purchase Agreement”), with REH Advisors Inc. (the “Selling Stockholder” or “REH”) (now the parent company of REH Company, LLC (formerly known as The Sinclair Companies)), pursuant to which the Company agreed to repurchase from the Selling Stockholder 2,375,000 shares of the Company’s outstanding common stock, par value $0.01 per share (t…

Executive Vice President, General Counsel — Eric Nitcher: Mr. Nitcher is retiring from his executive officer role, with an expected successor to be named later.

Results of Operations and Financial Condition. On July 28, 2026, HF Sinclair Corporation (the “Company”) issued a press release announcing the Company’s second quarter 2026 results. The press release also announced a regular quarterly dividend of $0.525 per share. A copy of the Company’s press release is attached hereto as Exhibit 99.1 and incorporated herein in its entirety. The information contained in, or incorporated into, this

President and Chief Operating Officer, President, Growth, Technology and Transformation — Steven Ledbetter, Valerie Pompa: Two internal promotions were made within the company.

Entry into a Material Definitive Agreement. HF Sinclair Corporation (the “Company”) entered into a Stock Purchase Agreement, dated May 18, 2026 (the “Stock Purchase Agreement”), with REH Advisors Inc. (the “Selling Stockholder” or “REH”) (now the parent company of REH Company, LLC (formerly known as The Sinclair Companies)), pursuant to which the Company agreed to repurchase from the Selling Stockholder 1,455,180 shares of the Company’s outstanding common stock, par value $0.01 per share (the…

Executive Vice President and Chief Financial Officer — Mr. Atanas Atanasov: The company terminated Mr. Atanas Atanasov's employment as Executive Vice President and Chief Financial Officer.

Chief Executive Officer and President — Timothy Go: Mr. Timothy Go resigned from his roles as CEO and President of the Company.

Results of Operations and Financial Condition. On May 1, 2026, HF Sinclair Corporation (the “Company”) issued a press release announcing the Company’s first quarter 2026 results. The press release also announced a regular quarterly dividend of $0.50 per share. A copy of the Company’s press release is attached hereto as Exhibit 99.1 and incorporated herein in its entirety. The information contained in, or incorporated into, this

Chief Executive Officer and President (temporary) — Franklin Myers: Mr. Franklin Myers was appointed as the temporary Chief Executive Officer and President of HF Sinclair Corporation.

Acting Chief Financial Officer (Acting CFO) — Mr. Vivek Garg: Vivek Garg was appointed as the Acting CFO while continuing to hold his current positions.

Chief Executive Officer and President — Mr. Tim Go: Mr. Tim Go took a voluntary leave of absence, leading to Mr. Franklin Myers being appointed as the temporary Chief Executive Officer and President.

is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any registration statement or other filing under the Securities Act of 1933, as amended (the “Securities Act”), except as shall be expressly set forth by specific reference to such filing.

is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any registration statement or other filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference to such filing. Cautionary Statement Regarding Forward-Looking Statements The following is a “safe har…

Entry into a Material Definitive Agreement. HF Sinclair Corporation (the “Company”) entered into a Stock Purchase Agreement, dated November 18, 2025 (the “Stock Purchase Agreement”) with REH Advisors Inc. (the “Selling Stockholder” or “REH”) (now the parent company of REH Company, LLC (formerly known as The Sinclair Companies)), pursuant to which the Company agreed to repurchase from the Selling Stockholder 437,238 shares of the Company’s outstanding common stock, par value $0.01 per share (t…

Entry into a Material Definitive Agreement. HF Sinclair Corporation (the “Company”) entered into a Stock Purchase Agreement, dated November 3, 2025 (the “Stock Purchase Agreement”) with REH Advisors Inc. (the “Selling Stockholder” or “REH”) (now the parent company of REH Company, LLC (formerly known as The Sinclair Companies)), pursuant to which the Company agreed to repurchase from the Selling Stockholder 960,061 shares of the Company’s outstanding common stock, par value $0.01 per share (th…

Results of Operations and Financial Condition. On October 30, 2025, HF Sinclair Corporation (the “Company”) issued a press release announcing the Company’s third quarter 2025 results. The press release also announced a regular quarterly dividend of $0.50 per share. A copy of the Company’s press release is attached hereto as Exhibit 99.1 and incorporated herein in its entirety. The information contained in, or incorporated into, this

Entry into a Material Definitive Agreement. On September 16, 2025, HF Sinclair Corporation (the “Company”) entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”) with REH Advisors Inc. (the “Selling Stockholder” or “REH”) (now the parent company of REH Company, LLC (formerly known as The Sinclair Companies)), pursuant to which the Company agreed to repurchase from the Selling Stockholder 1,948,558 shares of the Company’s outstanding common stock, par value $0.01 per share (t…

Regulation FD Disclosure. On August 20, 2025, HF Sinclair Corporation, a Delaware corporation (the “ Corporation ”), announced that it will redeem all of its outstanding 5.875% Senior Notes due 2026 (the “ 2026 Notes ”) and its 6.375% Senior Notes due 2027 (the “ 2027 DINO Notes ”) and all of the outstanding 6.375% Senior Notes due 2027 of Holly Energy Partners, L.P., a Delaware limited partnership, and Holly Energy Finance Corp,. a Delaware corporation, each a wholly owned subsidiary of the…

Entry into a Material Definitive Agreement. On August 18, 2025, HF Sinclair Corporation (the “Corporation”) completed a public offering of $500,000,000 aggregate principal amount of its 5.500% Senior Notes due 2032 (the “Notes”). The offering of the Notes was registered under the Securities Act of 1933 pursuant to an automatic shelf registration statement on Form S-3 (Registration No. 333-285291) of the Corporation, filed with the Securities and Exchange Commission (the “Commission”) on Febru…

Other Events. On August 15, 2025, HF Sinclair Corporation (the “Corporation”) issued (i) a press release announcing the pricing terms of its cash tender offer (the “Tender Offer”) to purchase any and all of the Corporation’s 5.875% Senior Notes due 2026 and 6.375% Senior Notes due 2027, and (ii) a press release announcing the final results and expiration of the Tender Offer. Copies of the press releases are filed as Exhibit 99.1 and Exhibit 99.2, respectively, to this report and are incorpora…

Other Events. On August 11, 2025, HF Sinclair Corporation (the “Corporation”) issued a press release announcing that the Corporation has commenced a cash tender offer (the “Tender Offer”) to purchase any and all of the Corporation’s (i) 5.875% Senior Notes due 2026 and (ii) 6.375% Senior Notes due 2027. The Tender Offer is subject to the terms and conditions set forth in an Offer to Purchase, dated August 11, 2025. A copy of the press release is filed as Exhibit 99.1 to this report and is inc…

Results of Operations and Financial Condition. On July 31, 2025, HF Sinclair Corporation (the “Company”) issued a press release announcing the Company’s second quarter 2025 results. The press release also announced a regular quarterly dividend of $0.50 per share. A copy of the Company’s press release is attached hereto as Exhibit 99.1 and incorporated herein in its entirety. The information contained in, or incorporated into, this

Results of Operations and Financial Condition. On May 1, 2025, HF Sinclair Corporation (the “Company”) issued a press release announcing the Company’s first quarter 2025 results. The press release also announced a regular quarterly dividend of $0.50 per share. A copy of the Company’s press release is attached hereto as Exhibit 99.1 and incorporated herein in its entirety. The information contained in, or incorporated into, this

Termination of a Material Definitive Agreement. The information set forth in