Company: DK
Filing Date: 2025-03-20
Form Type: DEFA14A
Source: 0001140361-25-009659
Chunk: 0

Company: Delek US Holdings, Inc.
Filing Date: 2025-03-20
Form: DEFA14A
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### SCHEDULE 14A
<div align='center'>Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

(Amendment No. )</div>

**Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to § 240.14a-12**

#### Delek US Holdings, Inc.
<div align='center'>(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

Payment of Filing Fee (Check the appropriate box):

☒ No fee required.

☐ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act rules 14a6(i)(1) and 0-11