Company: VIST
Filing Date: 2025-04-09
Form Type: 6-K
Source: 0001193125-25-076912
Chunk: 8

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-04-09
Form: 6-K
Chunk 8
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 appropriate, formalize the resolutions adopted at the Annual Ordinary General Shareholders’ Meeting; associated resolutions.

Below is an excerpt of the resolution adopted at the Annual Ordinary General
Meeting in connection with the ninth item of the Agenda:

“It is hereby designated that Elizabeth Gómez Saldaña, Javier Sebastián Rodríguez Galli, Carlos Zamarrón Ontiveros, Crisanto Jesús Sánchez Carrillo, Alejandro González Cruz, Luis Ernesto Garrido Solís, José Fernando del Toro Ocampo y Daniel Alberto Cevallos Heredia jointly or separately, by themselves or through the person they designate, if necessary, may appear before the notary public of their choice to request and grant the total or partial notarization of the present deed, as well as to issue the simple or certified copies, either in its entirety or in the pertinent part, of these minutes that may be requested of them, draft and sign the notices, publications, requests and writings that must be given in accordance with the applicable legal provisions and carry out the necessary formalities related to the matters approved at this Annual Ordinary General Meeting.”

10

With respect to the ninth item of the Agenda, the shareholders’ representative
announced the proxy vote with respect to the 56,919,605 shares present and represented at the Annual Ordinary General Meeting, and the vote tally resulted as follows: (i) affirmative vote of 56,805,029 shares, (ii) dissenting vote of 9,589
shares, and (iii) abstention of 104,987 shares.

* * *

11

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: April 9, 2025

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