Company: VIST
Filing Date: 2025-04-09
Form Type: 20-F
Source: 0001193125-25-076856
Chunk: 32

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-04-09
Form: 20-F
Item: Item 4
Chunk 32
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uco concessions in Argentina, and of our oil and gas reserves located in theCS-01concession in Mexico.

Argentina and Mexico Oil and Gas Reserves Information

The information included in “ Item 4 - Information on the Company - Industry and Regulatory Overview” of this annual report regarding Argentina’s and Mexico’s proved reserves has been prepared based on official and publicly available information of the Argentine Secretariat of Energy ( Secretar í a de Energ í a) (“ SdE”) and the former Mexican National Hydrocarbon Commission ( Comisi ó n Nacional de Hidrocarburos) (“ CNH”). References to the “ proved reserves” of Argentina and Mexico follow the definition of “proved reserves” as set forth in the guidelines published by the SdE and CNH, as applicable. However, the information regarding Vista’s proved reserves included elsewhere in this annual report has been prepared according to the definitions of Rule4-10(a)of Regulation S-Xor the Society of Petroleum Engineers (“ SPE”)’s Petroleum Resources Management System, which may differ from the relevant guidelines published by the Argentine and Mexican authorities. For more information, see “Item 4 - Information on the Company - Industry and Regulatory Overview - Oil and Gas Regulatory Framework in Argentina - Reserves and Resources Certification in Argentina” and “Item 4 - Information on the Company - Industry and Regulatory Overview - Oil and Gas Regulatory Framework in Mexico - Reserves and Resources Certification in Mexico.”

Certain Definitions

“ ADR” means American Depositary Receipt.

“ ADS” means American Depositary Share.

“ Argentine Constitution” means the Argentine National Constitution (Constitución Nacional de la República Argentina).

“ Argentine Executive Branch” means the Argentine federal executive branch.