Company: VIST
Filing Date: 2025-06-02
Form Type: 6-K
Source: 0001193125-25-132874
Chunk: 0

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-06-02
Form: 6-K
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16OR 15d-16

UNDER SECURITIES EXCHANGE ACT OF 1934

For the month of June 2025

Commission File No. 001-39000

Vista Energy, S.A.B. de C.V.

(Exact Name of the Registrant as Specified in the Charter)

N.A.

(Translation of Registrant’s Name into English)

Torre Mapfre,

243 Paseo de la Reforma Avenue, 18 thFloor

Colonia Renacimiento, Alcaldía Cuauhtémoc

06600, Mexico City

Mexico

(Address of Principal Executive Office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

Vista announces 143 MMboe of estimated P1 reserves in La Amarga Chica and provides operational and financial update Mexico City, June 2, 2025 – Vista Energy, S.A.B. de C.V. (“Vista” or the “Company”) (NYSE: VIST; BMV: VISTA) announced today an estimation of 143 MMboe of proved (“P1”) reserves corresponding to its 50% working interest in La Amarga Chica and provided an operational and financial update. As previously announced, on April 15, 2025, Vista Energy Argentina S.A.U. (“Vista Argentina”) and Vista consummated the acquisition of 100% of Vista Energy LACH S.A. (formerly known as Petronas E&P Argentina S.A.) (“PEPASA”)’s capital stock (the “PEPASA Acquisition”). PEPASA owns a 50% non-operatedworking interest in the La Amarga Chica concession, which is located in Argentina. PEPASA Reserves The table below includes PEPASA’s estimates of the proved reserves in La Amarga Chica as of December 31, 2024 (calculated at 50% working interest held by PEPASA). PEPASA has 188 net proved well locations booked at its 50% working interest, of which 122 are booked as proved developed and 66 as proved undeveloped.

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