Vista Energy holder Galuccio reports 6.1% stake

Vista Energy, S.A.B. de C.V.

Rhea-AI Filing Summary

Vista Energy, S.A.B. de C.V. (VIST) received an amended Schedule 13D from Miguel Matias Galuccio reporting beneficial ownership of 6,739,892 series A shares, representing approximately 6.1% of the outstanding series A shares. This position comprises 3,309,936 series A shares, 2,935,735 series A shares represented by American depositary shares, and 494,221 series A shares deliverable upon exercise of vested stock options. The percentage is based on 111,111,623 series A shares outstanding, including the option shares. Galuccio is reported to have sole voting and dispositive power over these shares. On July 13, 2026, 281,186 vested stock options beneficially owned by him were canceled by the company at a price of $66.3 per series A share, and no other acquisitions or dispositions of series A shares or ADSs were reported in the prior 60 days.

Key Figures

Beneficial ownership: 6,739,892 series A shares Ownership percentage: 6.1% Series A shares outstanding baseline: 111,111,623 series A shares +5 more

8 metrics

Beneficial ownership 6,739,892 series A shares Shares beneficially owned by Miguel Matias Galuccio as of the event date

Ownership percentage 6.1% Percent of Vista Energy series A shares represented by 6,739,892 shares

Series A shares outstanding baseline 111,111,623 series A shares Total used to calculate beneficial ownership percentage, including option shares

Common shares held 3,309,936 series A shares Part of Galuccio’s beneficial ownership position

ADS-represented shares held 2,935,735 series A shares Series A shares represented by 2,935,735 American depositary shares

Shares deliverable from vested options 494,221 series A shares Deliverable upon exercise of 494,221 vested stock options included in ownership

Vested stock options canceled 281,186 options Options canceled on July 13, 2026 at $66.3 per series A share

Option cancellation price $66.3 per series A share Price at which 281,186 vested stock options were canceled on July 13, 2026

Key Terms

beneficial owner, American depositary shares, vested stock options, sole voting and dispositive power, +1 more

5 terms

beneficial owner regulatory

"the Reporting Person may be deemed to be the beneficial owner of 6,739,892"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

American depositary shares financial

"series A shares represented by 2,935,735 American depositary shares"

American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.

vested stock options financial

"494,221 series A shares deliverable upon exercise of 494,221 vested stock options"

Vested stock options are the portions of an employee’s stock option grant that they have earned the right to buy at a predetermined price after meeting time or performance conditions. For investors, vested options matter because they can convert into actual shares that dilute existing ownership or signal insiders’ confidence when exercised or sold, much like a voucher that becomes redeemable and can change how many tickets are in circulation.

sole voting and dispositive power regulatory

"The Reporting Person may be deemed to have sole voting and dispositive power"

Rule 13d-3(d)(1)(i) regulatory

"included pursuant to Rule 13d-3(d)(1)(i) of the Securities Act of 1933"

FAQ

How many Vista Energy (VIST) shares does Miguel Matias Galuccio currently beneficially own?

Miguel Matias Galuccio is reported as the beneficial owner of 6,739,892 series A shares of Vista Energy, S.A.B. de C.V., including common shares, American depositary shares, and shares deliverable upon exercise of vested stock options.

What percentage of Vista Energy (VIST) does Miguel Matias Galuccio beneficially own?

Miguel Matias Galuccio beneficially owns approximately 6.1% of Vista Energy’s series A shares, based on 111,111,623 series A shares outstanding, which includes shares deliverable upon exercise of vested stock options.

How is Miguel Matias Galuccio’s Vista Energy (VIST) stake structured?

His stake consists of 3,309,936 series A shares, 2,935,735 series A shares represented by American depositary shares, and 494,221 series A shares deliverable upon exercise of 494,221 vested stock options.

What option-related transaction did Miguel Matias Galuccio report for Vista Energy (VIST)?

On July 13, 2026, 281,186 vested stock options beneficially owned by Miguel Matias Galuccio were canceled by the company at a price of $66.3 per series A share.

Does Miguel Matias Galuccio have sole voting power over his Vista Energy (VIST) shares?

Yes. He is reported to have sole voting and sole dispositive power over the 6,739,892 series A shares he beneficially owns, with no shared voting or dispositive power.

Were there other recent trades in Vista Energy (VIST) by Miguel Matias Galuccio?

The filing states that, apart from the July 13, 2026 cancellation of 281,186 vested stock options, Miguel Matias Galuccio has not made any other acquisitions or dispositions of series A shares or ADSs in the past 60 days.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/28/2026 - 04:30 PM Accepted by SEC EDGAR 08/28/2026 - 04:30 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 2)

Vista Energy, S.A.B. de C.V.

(Name of Issuer)

Series A Shares, no par value / American Depositary Shares, each representing one series A share, no par value

(Title of Class of Securities)

92837L109

(CUSIP Number)

Miguel Matias Galuccio
Torre Mapfre, 243 Paseo de la Reforma Av, 18th Floor
Mexico City, O5, 06500
54 11 3754 8500

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

07/13/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 92837L109

1

Name of reporting person

Miguel Matias Galuccio

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

ARGENTINA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 6,739,892.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 6,739,892.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

6,739,892.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

6.1 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

The securities reported in rows (7), (9) and (11) include: (i) 3,309,936 series A shares, (ii) 2,935,735 series A shares represented by 2,935,735 American depositary shares, and (iii) 494,221 series A shares deliverable upon exercise of 494,221 vested stock options. The calculation reported in row (11) is based on 111,111,623 series A shares outstanding, which includes (i) 110,617,402 series A shares outstanding as of the date hereof, and (ii) 494,221 series A shares deliverable upon exercise of 494,221 vested stock options.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Series A Shares, no par value / American Depositary Shares, each representing one series A share, no par value
(b)	Name of Issuer: Vista Energy, S.A.B. de C.V.
(c)	Address of Issuer's Principal Executive Offices: Torre Mapfre, 243 Paseo de la Reforma Av, 18th Floor, Mexico City, MEXICO , 06500.
Item 1 Comment: This Amendment No. 2 (the "Second Amendment") amends the Schedule 13D filed with the Securities and Exchange Commission on February 15, 2022, as amended from time to time (the "Schedule 13D") by the Reporting Person (as defined in the Schedule 13D), with respect to the series A shares, of Vista Energy, S.A.B. de C.V. (the "Issuer"), whose principal executive offices are located at Torre Mapfre, 243 Paseo de la Reforma Avenue, 18th Floor, Colonia Renacimiento, Alcaldia Cuauhtemoc, 06500, Mexico City, Mexico. This Second Amendment should be read in conjunction with, and is qualified in its entirety by reference to, the Schedule 13D. Except as disclosed in and expressly amended by this Second Amendment, all information set forth in the Schedule 13D is hereby unaffected. All capitalized terms used in this Second Amendment and not otherwise defined herein have the meanings ascribed to such terms in the Schedule 13D. This Second Amendment amends and restates Items 5(a)-(c).
Item 5.	Interest in Securities of the Issuer
(a)	As of the date hereof, the Reporting Person may be deemed to be the beneficial owner of 6,739,892 series A shares, representing approximately 6.1% of the total number of series A shares outstanding. This amount consists of: (i) 3,309,936 series A shares, (ii) 2,935,735 series A shares represented by 2,935,735 American depositary shares, and (iii) 494,221 series A shares deliverable upon exercise of 494,221 vested stock options. The foregoing beneficial ownership percentage is based on 111,111,623 series A shares outstanding, which includes (i) 110,617,402 series A shares outstanding as of the date hereof, and (ii) 494,221 series A shares deliverable upon exercise of 494,221 vested stock options. The series A shares deliverable upon exercise of the stock options referred to in the previous sentence are beneficially owned by the Reporting Person and included pursuant to Rule 13d-3(d)(1)(i) of the Securities Act of 1933.
(b)	The Reporting Person may be deemed to have sole voting and dispositive power with respect to the 6,739,892 series A shares.
(c)	On July 13, 2026, 281,186 vested stock options beneficially owned by the Reporting Person were canceled by the company at a price of $66.3 per series A share. The Reporting Person has not otherwise made any acquisition or disposition of series A shares or American Depositary Shares during the past sixty (60) days.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Miguel Matias Galuccio

Signature:	/s/ Miguel Matias Galuccio
Name/Title:	Miguel Matias Galuccio
Date:	08/28/2026