Company: VIST
Filing Date: 2025-10-22
Form Type: 6-K
Source: 0001193125-25-246886
Chunk: 1

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-10-22
Form: 6-K
Chunk 1
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 our website: www.vistaenergy.com.

Enquiries:

Investor Relations:

ir@vistaenergy.com

Argentina: +54 11 3754 8500

Mexico: + 52 55 1555 7104

SIGNATURE 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. Date: October 22, 2025

| VISTA ENERGY, S.A.B. DE C.V. |     |                                                   |
| By:                          |     | /s/ Alejandro Cherñacov                           |
| Name:                        |     | Alejandro Cherñacov                               |
| Title:                       |     | Strategic Planning and Investor Relations Officer |