Other Events. On October 29, 2026, Delek US Holdings, Inc. (the “Company”) announced that its Board of Directors has approved a quarterly dividend of $0.30 per share, to be paid on November 18, 2026, to shareholders of record on November 10, 2026. The Company’s press release regarding the dividend is included as Exhibit 99.1.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Other Events Purchase Agreement On September 24, 2026, the Company entered into a purchase agreement (the “Purchase Agreement”) with Mizuho Securities USA LLC, Wells Fargo Securities, LLC and Truist Securities, Inc., as representatives of the several initial purchasers named therein (collectively, the “Initial Purchasers”), in connection with the Offering. In addition, pursuant to the terms of the Purchase Agreement, the Company granted the Initial Purchasers a 13-day option to purchase addit…

Entry Into a Material Definitive Agreement Indenture and Notes On September 29, 2026, Delek US Holdings, Inc. (the “Company”) completed its previously announced private offering (the “Offering”) of $460,000,000 aggregate principal amount of the Company’s 0.00% Convertible Senior Notes due 2031 (the “Notes”), pursuant to an indenture, dated September 29, 2026 (the “Indenture”), among the Company, the guarantors named therein and U.S. Bank Trust Company, National Association, as trustee (the “T…

Unregistered Sales of Equity Securities. The information set forth under Items 1.01 and 8.01 of this Current Report on Form 8-K is incorporated herein by reference. The Company offered and sold the Notes to the Initial Purchasers in reliance on the exemption from registration provided by Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”), and the Notes were resold by the Initial Purchasers to persons whom the Initial Purchasers reasonably believed are qualified i…

Results of Operations and Financial Condition On August 5, 2026, Delek US Holdings, Inc. (the "Company") announced its financial results for the quarter ended June 30, 2026. The full text of the press release is furnished as Exhibit 99.1 hereto. The information in the attached Exhibit is being furnished pursuant to Item 2.02 “Results of Operations and Financial Condition” on Form 8-K. The information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934…

Results of Operations and Financial Condition On August 5, 2026, Delek US Holdings, Inc. (the "Company") announced its financial results for the quarter ended June 30, 2026. The full text of the press release is furnished as Exhibit 99.1 hereto. The information in the attached Exhibit is being furnished pursuant to Item 2.02 “Results of Operations and Financial Condition” on Form 8-K. The information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934…

Other Events. On July 23, 2026, Delek US Holdings, Inc. (the “Company”) announced that its Board of Directors has approved a quarterly dividend of $0.255 per share, to be paid on August 10, 2026, to shareholders as of record on August 3, 2026. The Company’s press release regarding the dividend is included as Exhibit 99.1.

Executive Vice President, Logistics — Mark Hobbs: Mr. Hobbs was promoted to Executive Vice President, Logistics.

Entry into a Material Definitive Agreement. On May 15, 2026 (the “Closing Date”), Delek US Holdings, Inc. (the “Company”) closed the previously announced amendment (“Amendment No. 1”) to the Amended and Restated Term Loan Credit Agreement, dated as of November 18, 2022 (the “Existing Term Credit Facility”, and as amended by Amendment No. 1, the “Term Credit Facility”), by and among the Company, as borrower, certain subsidiaries of the Company, as guarantors, the lenders party thereto, and Wel…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information described in

shall be deemed “furnished” and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Securities Act of 1933, as amended (the “Securities Act”), except to the extent that such filing incorporates by reference any or all of such information by express reference thereto. Cautionary Note on Forward-Looking Statements This Current Report on Form 8-K…

Results of Operations and Financial Condition On April 29, 2026, Delek US Holdings, Inc. (the "Company") announced its financial results for the quarter ended March 31, 2026. The full text of the press release is furnished as Exhibit 99.1 hereto. The information in the attached Exhibit is being furnished pursuant to Item 2.02 “Results of Operations and Financial Condition” on Form 8-K. The information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 193…

The filing describes a change in the company's long-term incentive plan, which is not related to any management movement.

Executive Vice President, Refining and Renewables — Joseph Israel: Mr. Israel departed from his position as Executive Vice President, Refining and Renewables.

Other Events. On April 20, 2026, Delek US Holdings, Inc. (the “Company”) announced that its Board of Directors has approved a quarterly dividend of $0.255 per share, to be paid on May 8, 2026, to shareholders as of record on May 1, 2026. The Company’s press release regarding the dividend is included as Exhibit 99.1.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information described in

Entry into a Material Definitive Agreement. On April 9, 2026, Delek US Holdings, Inc. (the “Company”) entered into Amendment No. 4 to Third Amended and Restated Credit Agreement (“Amendment No. 4”) among the Company, as borrower, certain wholly-owned subsidiaries of the Company, as guarantors, Wells Fargo Bank, National Association, as administrative agent and certain other lenders party thereto. Amendment No. 4 amends the existing Third Amended and Restated Credit Agreement, dated as of Octo…

Results of Operations and Financial Condition On February 27, 2026, Delek US Holdings, Inc. (the "Company") announced its financial results for the quarter ended December 31, 2025. The full text of the press release is furnished as Exhibit 99.1 hereto. The information in the attached Exhibit is being furnished pursuant to Item 2.02 “Results of Operations and Financial Condition” on Form 8-K. The information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act…

Other Events. On February 18, 2025, Delek US Holdings, Inc. (the “Company”) announced that its Board of Directors has approved a quarterly dividend of $0.255 per share, to be paid on March 9, 2026, to shareholders as of record on March 2, 2026. The Company’s press release regarding the dividend is included as Exhibit 99.1.

Results of Operations and Financial Condition On November 7, 2025, Delek US Holdings, Inc. (the "Company") announced its financial results for the quarter ended September 30, 2025. The full text of the press release is furnished as Exhibit 99.1 hereto. The information in the attached Exhibit is being furnished pursuant to Item 2.02 “Results of Operations and Financial Condition” on Form 8-K. The information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act…

Other Events. On October 29, 2025, Delek US Holdings, Inc. (the “Company”) announced that its Board of Directors has approved a quarterly dividend of $0.255 per share, to be paid on November 17, 2025, to shareholders as of record on November 10, 2025. The Company’s press release regarding the dividend is included as Exhibit 99.1.

Results of Operations and Financial Condition On August 6, 2025, Delek US Holdings, Inc. (the "Company") announced its financial results for the quarter ended June 30, 2025. The full text of the press release is furnished as Exhibit 99.1 hereto. The information in the attached Exhibit is being furnished pursuant to Item 2.02 “Results of Operations and Financial Condition” on Form 8-K. The information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934…

Other Events. On July 30, 2025, Delek US Holdings, Inc. (the “Company”) announced that its Board of Directors has approved a quarterly dividend of $0.255 per share, to be paid on August 18, 2025, to shareholders as of record on August 11, 2025. The Company’s press release regarding the dividend is included as Exhibit 99.1.

Results of Operations and Financial Condition On May 7, 2025, Delek US Holdings, Inc. (the "Company") announced its financial results for the quarter ended March 31, 2025. The full text of the press release is furnished as Exhibit 99.1 hereto. The information in the attached Exhibit is being furnished pursuant to Item 2.02 “Results of Operations and Financial Condition” on Form 8-K. The information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 o…