Company: DK
Filing Date: 2025-03-20
Form Type: DEF 14A
Source: 0001140361-25-009658
Chunk: 6

Company: Delek US Holdings, Inc.
Filing Date: 2025-03-20
Form: DEF 14A
Chunk 6
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 Stock were issued and outstanding. The Common Stock is our only outstanding class of voting securities. Each outstanding share of Common Stock is entitled to one vote for all matters before the Annual Meeting. If you virtually attend the Annual Meeting, which is the only way to attend the Annual Meeting, you may vote your shares online. Votes submitted and received as provided below

on or before 11:59 p.m. eastern time on April 28, 2025 will be counted. Only votes submitted online at the virtual Annual Meeting will be counted after that time. How do I vote? If you were a stockholder of record at the close of business on March 10, 2025, you can vote your shares by any one of the following methods:

| VOTING METHODS     
 BEFORE THE MEETING |     | BY INTERNETGo towww.proxyvote.comfor voting instructions or scan the QR code on your Important Notice Regarding the Availability of Proxy Materials or proxy card with your smartphone, then cast your vote electronically by 11:59 p.m. (Eastern Daylight Time) on April 28, 2025. 
 BY TELEPHONEYou may call                                                                                                                                                                                                                                                            
 1-800-690-6903on a touch-tone telephone and follow the instructions provided by the recorded message to vote your shares by telephone by 11:59 p.m. (Eastern Daylight Time) on April 28, 2025.                                                                                      |
|:-------------------|:----|:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                    |     | BY MAILYou may promptly mail your completed and executed proxy card in the postage-paid envelope, which must be received by the Company on or prior to April 28, 2025.                                                                                                              |
| DURING THE MEETING |     |                                                                                                                                                                                                                                                                                     |
|                    |     | VIRTUAL MEETINGGo towww.virtualshareholdermee ting.com/DK2025and follow the posted instructions. You will need the 16-digit control number included on your Notice of Internet Availability, your proxy card, or the voting instructions that accompany your proxy materials.       |

| DELEK US HOLDINGS, INC. |     | 2025 PROXY STATEMENT | 4 |

TABLE OF CONTENTS Even if you currently plan to virtually attend the Annual Meeting, we recommend that you submit your proxy by one of the methods described above so that your shares will be represented and your vote will be counted if you later decide not to virtually attend and vote online at the Annual Meeting. If you