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Form SCHEDULE 13D/A Vista Energy, S.A.B. de Filed by: Galuccio Miguel Matias

August 28, 2026 4:31 PM





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).




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SCHEDULE 13D




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


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

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