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Form 3 Vista Energy, S.A.B. de For: Mar 18 Filed by: Weissel Matias

March 18, 2026 7:02 AM
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person *
Weissel Matias
(Last) (First) (Middle)
AVENIDA PASEO DE LA REFORMA 243, PISO 18
(Street)
CIUDAD DE MEXICO CUAUHTEMOC 06500
(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026 		3. Issuer Name and Ticker or Trading Symbol
Vista Energy, S.A.B. de C.V. [ VIST ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Chief Operations Officer
 5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Series A Shares 182,967 (1)
D
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Options (Right to Buy) (2) 04/28/2030 Series A Shares / American Depositary Shares ("ADSs") 50,000 2.1 D
Employee Stock Options (Right to Buy) (2) 04/01/2031 Series A Shares / ADSs 40,650 2.85 D
Employee Stock Options (Right to Buy) (2) 04/01/2032 Series A Shares / ADSs 32,683 7.05 D
Employee Stock Options (Right to Buy) (2) 04/01/2033 Series A Shares / ADSs 7,806 17.83 D
Employee Stock Options (Right to Buy) 04/01/2026 04/01/2033 Series A Shares / ADSs 3,904 17.83 D
Employee Stock Options (Right to Buy) (2) 04/01/2034 Series A Shares / ADSs 2,999 32.02 D
Employee Stock Options (Right to Buy) 04/01/2026 04/01/2034 Series A Shares / ADSs 2,999 32.02 D
Employee Stock Options (Right to Buy) 04/01/2027 04/01/2034 Series A Shares / ADSs 3,000 32.02 D
Employee Stock Options (Right to Buy) (3) (2) 01/02/2035 Series A Shares / ADSs 3,902 54.09 D
Employee Stock Options (Right to Buy) (3) 01/02/2027 01/02/2035 Series A Shares / ADSs 3,902 54.09 D
Employee Stock Options (Right to Buy) (3) 01/02/2028 01/02/2035 Series A Shares / ADSs 3,903 54.09 D
Employee Stock Options (Right to Buy) (3) 01/02/2027 01/02/2036 Series A Shares / ADSs 5,329 47.96 D
Employee Stock Options (Right to Buy) (3) 01/02/2028 01/02/2036 Series A Shares / ADSs 5,329 47.96 D
Employee Stock Options (Right to Buy) (3) 01/02/2029 01/02/2036 Series A Shares / ADSs 5,329 47.96 D
Employee Stock Options (Right to Buy) (3) 04/23/2028 04/23/2035 Series A Shares / ADSs 201,923 52.3 D
Restricted Stock Unit (4) (4) (4) Series A Shares / ADSs 13,377 (4) D
Performance Stock Unit (5) (5) (5) Series A Shares / ADSs 40,403 (5) D
Explanation of Responses:
1. 54,516 series A shares held directly and 128,451 series A shares represented by 128,451 American despositary shares. Each American depositary share respresents one series A share.
2. Stock Options vested and exercisable through the date indicated under "Expiration Date."
3. Stock Options will vest on the date indicated under "Date Exercisable," and are exercisable through the date indicated under "Expiration Date."
4. Each Restricted Stock Unit represents a contingent right to receive one series A share of the Company or the value thereof in cash. RSUs may vest commencing on the following dates, subject to the satisfaction of certain conditions: 1,593 RSUs on 12/01/2026, 4,622 RSUs on 01/02/2027, 4,621 RSUs on 01/02/2028 and 2,541 RSUs on 01/02/2029.
5. Each Performance Stock Unit (PSUs) represents a contingent right to receive one series A share of the Company or the value thereof in cash. PSUs may vest commencing on the following dates, subject to the satisfaction of certain conditions: 15,037 PSUs on 12/31/2026 and 25,366 PSUs on 02/26/2028.
/s/ Matias Weissel 03/18/2026
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

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