DINO

dino-202602180001915657falseChicago Stock Exchange, Inc.00019156572026-02-182026-02-180001915657exch:XNYS2026-02-182026-02-180001915657exch:XCHI2026-02-182026-02-18

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 18, 2026 (February 17, 2026)

HF SINCLAIR CORPORATION

(Exact name of Registrant as specified in its charter)

Delaware001-4132587-2092143 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification Number)

2323 Victory Avenue, Suite 1400

Dallas, TX 75219 (Address of principal executive offices)(Zip code)

Registrant’s telephone number, including area code: (214) 871-3555

Not applicable (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock $0.01 par valueDINONew York Stock Exchange NYSE Texas, Inc.

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        ☐ 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 revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     ☐

Item 2.02Results of Operations and Financial Condition.

On February 18, 2026, HF Sinclair Corporation (the “Company”) issued a press release announcing the Company’s fourth 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 Item 2.02 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.

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

On February 17, 2026, the Board of Directors of the Company (the “Board”) received a request from Mr. Tim Go, the Company’s Chief Executive Officer and President, and a member of the Board, to take a voluntary leave of absence from his duties. The Board has accepted the request and, in a special meeting, elected the current Chairperson of the Board, Mr. Franklin Myers, as Chief Executive Officer and President of the Company on a temporary basis, effective as of February 17, 2026. The Board has directed the Nominating, Governance and Social Responsibility Committee of the Board to commence a process to determine what future actions, whether interim or otherwise, should be taken in relation to the position of Chief Executive Officer and President. Mr. Go’s voluntary leave of absence is not due to any disagreement with the Company on any matter relating to the Company’s operations, policies or practices.

Mr. Myers, 73, has served as the Chairperson of the Board of the Company since February 2019. He has served as an Operating Partner of Quantum Energy Partners, a private equity firm, since 2024, and previously served as a Senior Advisor of Quantum Energy Partners since February 2013. Mr. Myers served as an operating advisor to Paine & Partners, LLC, a private equity firm, from 2009 through 2012 and as Senior Advisor to Cameron International Corporation, a publicly traded provider of flow equipment products, from 2008 until 2009. He served Cameron in various other capacities, including as Senior Vice President and Chief Financial Officer from 2003 through 2008, President of Cameron’s compression business from 1998 through 2001 and Senior

dino-202510300001915657falseChicago Stock Exchange, Inc.00019156572025-10-302025-10-300001915657exch:XNYS2025-10-302025-10-300001915657exch:XCHI2025-10-302025-10-30

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 30, 2025

HF SINCLAIR CORPORATION

(Exact name of Registrant as specified in its charter)

Delaware001-4132587-2092143 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification Number)

2323 Victory Avenue, Suite 1400

Dallas, TX 75219 (Address of principal executive offices)(Zip code)

Registrant’s telephone number, including area code: (214) 871-3555

Not applicable (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock $0.01 par valueDINONew York Stock Exchange NYSE Texas, Inc.

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        ☐ 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 revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     ☐

Item 2.02 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 Item 2.02 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.

Item 9.01 Financial Statements and Exhibits

(d)    Exhibits

Exhibit NumberDescription

99.1Press Release of the Company issued October 30, 2025.*

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the inline XBRL document).

* Furnished herewith pursuant to Item 2.02.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

HF SINCLAIR CORPORATION

By: /s/ Atanas H. Atanasov

Atanas H. Atanasov Executive Vice President and Chief Financial Officer

Date: October 30, 2025

dino-202507310001915657falseChicago Stock Exchange, Inc.00019156572025-07-312025-07-310001915657dino:NewYorkStockExchangeMember2025-07-312025-07-310001915657dino:NYSETexasInc.Member2025-07-312025-07-31

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 31, 2025

HF SINCLAIR CORPORATION

(Exact name of Registrant as specified in its charter)

Delaware001-4132587-2092143 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification Number)

2323 Victory Avenue, Suite 1400

Dallas, TX 75219 (Address of principal executive offices)(Zip code)

Registrant’s telephone number, including area code: (214) 871-3555

Not applicable (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock $0.01 par valueDINONew York Stock Exchange Common Stock $0.01 par valueDINONYSE Texas, Inc.

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        ☐ 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 revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     ☐

Item 2.02 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 Item 2.02 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.

Item 9.01 Financial Statements and Exhibits.

(d)    Exhibits

Exhibit NumberDescription

99.1Press Release of the Company issued July 31, 2025.*

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the inline XBRL document).

* Furnished herewith pursuant to Item 2.02.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

HF SINCLAIR CORPORATION

By: /s/ Atanas H. Atanasov

Atanas H. Atanasov Executive Vice President and Chief Financial Officer

Date: July 31, 2025