Exhibit 5.1
January 24, 2025
Vista Energy S.A.B. de C.V.,
Pedregal 24, Piso 4,
Colonia Molino del Rey,
Miguel Hidalgo, Ciudad de México,
Código Postal 11040.
Ladies and Gentlemen:
We have acted as special Mexican counsel to Vista Energy, S.A.B. de C.V. (Vista or the Company), in
connection with the preparation and filing by the Company with the Securities and Exchange Commission (the SEC) of a registration statement on Form S-8 (together with all its exhibits, the
Registration Statement) pursuant to the Securities Act of 1933 and relating to the registration of Companys series A shares of common stock, no par value and one vote per share (the Series A Shares), which
may be used from time to time pursuant to awards granted under the long term incentive plan of Vista (the Plan). Terms not defined herein shall have the meaning ascribed to them in the Registration Statement.
In rendering the opinion set forth herein, we have only examined copies of the following:
1. the stock certificate representing the Series A Shares (the Series A Shares Certificate);
2. the public deeds listed and described in Schedule A hereto, which contains the deed of incorporation (acta constitutiva) and the current by-laws (estatutos sociales) (collectively, the Estatutos Sociales) of Vista; and
3. the
documents described in Schedule B hereto, which contain the shareholders resolutions, approving, among other things, the issuance of the Series A Shares and the Plan (the Shareholders Resolutions).
For purposes of this opinion letter, the documents listed in numerals 1 to 3 above are hereinafter collectively referred to as the
Opinion Documents.
In rendering the opinion expressed below, we have assumed without any independent investigation or
verification of any kind, the legal capacity and authority of all natural persons, the genuineness of all signatures, the authenticity and effectiveness of all documents submitted to us as originals and the conformity to authentic original documents
of all documents submitted to us as copies. With respect to factual matters, we have relied upon certificates of representatives of Vista and upon representations made in or pursuant to the Opinion Documents. We have not undertaken any independent
investigations before any public registries. We have also assumed that the Estatutos Sociales, and the Shareholders Resolutions have not been amended, revoked or modified in any way since the date of the Estatutos Sociales and Shareholders
Resolutions mentioned above.
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