Company: VIST
Filing Date: 2025-02-26
Form Type: 6-K
Source: 0001193125-25-036774
Chunk: 2

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-02-26
Form: 6-K
Chunk 2
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 the Annual Ordinary General Shareholders’ Meeting, they are required to provide a deposit certificate ( constancia de depósito) issued by the S.D. Indeval, Institución para el Depósito de Valores, S.A. de C.V., together with, if applicable, the supplementary list referred to in the LMV, no later than three business days prior to the date of the Annual Ordinary General Shareholders’ Meeting hereby called, at the aforementioned address, between 9:00 AM to 2:00 PM and 4:30 PM to 7:00 PM, from Monday to Friday, during business days. Upon delivery of such deposit certificates ( constancias de depósito) by the Shareholders, entry passes will be issued without which such Shareholders will not be allowed to participate in the Annual Ordinary General Shareholders’ Meeting. Shareholders can attend the Annual Ordinary General Shareholders’ Meeting personally or represented by an attorney-in-factappointed by means of a power of attorney granted in terms of the templates provided by the Company pursuant to Section 49, subsection III of the LMV or by means of a power of attorney granted in accordance with civil law and also pursuant to the provisions set forth in Section 192 of the LGSM. The template of power of attorney and other documents related to the Agenda are available for consultation at the address set forth above as well as on the website of the Company: http://www.vistaenergy.com/en/investors/. Mexico City, Mexico as of February 26, 2025 /s/Miguel Matías Galuccio Miguel Matías Galuccio Chairman of the Board of Directors of Vista Energy, S.A.B. de C.V.

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: February 26, 2025

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