Exhibit 8.1

List of Subsidiaries of Vista Energy, S.A.B de C.V. as of December 31, 2025

 

Subsidiary		Jurisdiction of incorporation		Name under which the subsidiary does business
Vista Energy Argentina S.A.U.		Argentina		Vista Argentina
Vista Energy LACH S.A.		Argentina		Vista LACH
Vista Energy Holding I, S.A. de C.V.		Mexico		Vista Holding I
Vista Energy Holding II, S.A. de C.V.		Mexico		Vista Holding II
Vista Energy International S.A.		Uruguay		VEISA
Aluvional S.A.		Argentina		Aluvional