Company: VIST
Filing Date: 2025-06-10
Form Type: 6-K
Source: 0001193125-25-138466
Chunk: 0

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-06-10
Form: 6-K
Chunk 0
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### 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 ☐

Advance Notice of 2nd Quarter of 2025 Results

Mexico City, June 10, 2025 — Vista Energy, S.A.B. de C.V. (“” or the “”) (NYSE: VIST;
BMV: VISTA) announced today that it will release its consolidated financial statements for the second quarter of 2025 on Thursday, July 10, 2025, after market closes.

The Company will present the results through a webcast on Friday, July 11, 2025, at 7:00 am Mexico City time (9:00 am ET; 10:00 am BAT).

The webcast will be accessible on the Company’s website, at .

Forward-Looking Statements

Any
statements contained herein or in the attachments hereto regarding Vista that are not historical or current facts are forward-looking statements. These forward-looking statements convey Vista’s current expectations or forecasts of future
events. Forward-looking statements regarding Vista involve known and unknown risks, uncertainties and other factors that may cause Vista’s actual results, performance or achievements to be materially different from any future results,
performances or achievements expressed or implied by the forward-looking statements. Certain of these risks and uncertainties are described in the “Risk Factors,” “Forward-Looking Statements” and other applicable sections of
Vista’s annual report filed with the United States Securities and Exchange Commission (“”) on Form 20-F and other applicable filings with the SEC and Vista’s latest annual report