Company: VIST
Filing Date: 2025-01-24
Form Type: S-8
Source: 0001193125-25-012260
Chunk: 2

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-01-24
Form: S-8
Chunk 2
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 by reference to the Registrant’s registration statement on Form F-1 filed with the SEC on July 2, 2019) |
|:------|:----|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 5.1*  |     | Opinion of Creel, García-Cuéllar, Aiza y Enríquez, S.C., counsel to the Registrant, as to the legality of the securities being registered                                                                                                                                              |
| 23.1* |     | Consent of Creel, García-Cuéllar, Aiza y Enríquez, S.C., counsel to the Registrant (included in Exhibit 5.1)                                                                                                                                                                           |
| 23.2* |     | Consent of Pistrelli, Henry Martin y Asociados S.A. (successor of Pistrelli, Henry Martin y Asociados S.R.L.), member of Ernst & Young Global Limited                                                                                                                                  |
| 23.3* |     | Consent of Mancera, S.C., member of Ernst & Young Global Limited                                                                                                                                                                                                                       |
| 24.1* |     | Power of Attorney (included in the signature page to this Registration Statement)                                                                                                                                                                                                      |
| 107*  |     | Filing Fee Tables for Form S-8                                                                                                                                                                                                                                                         |

| * | Filed herewith |

| ‡ | Incorporated herein by reference |

SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, as of January 24, 2025.

| Vista Energy, S.A.B. de C.V. |     |                                |
| By:                          |     | /s/ Miguel Galuccio            |
|                              |     | Name: Miguel Galuccio          |
|                              |     | Title: Chief Executive Officer |
| By:                          |     | /s/ Pablo Vera Pinto           |
|                              |     | Name: Pablo Vera Pinto         |
|                              |     | Title: Chief Financial Officer |

POWER OF ATTORNEY We, the undersigned directors and officers of Vista Energy, S.A.B. de C.V. (the “Company”), do hereby severally constitute and appoint Miguel Galuccio and Pablo Vera Pinto, each our true and lawful attorneys and agents