Company: VIST
Filing Date: 2025-06-02
Form Type: 6-K
Source: 0001193125-25-132874
Chunk: 2

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-06-02
Form: 6-K
Chunk 2
---
,705 |     |      | 30,927 |     |             | 3 | % |     |            | 19 | % |

2

Summary Pro Forma Financial Data in U.S. Dollars of Vista Energy Argentina S.A.U.

The tables below include unaudited pro forma financial information as of and for the three-month period ended March 31, 2025 and for the year ended
December 31, 2024, giving effect to the PEPASA Acquisition on Vista Argentina. The unaudited pro forma statement of financial position as of March 31, 2025 was prepared as if the PEPASA Acquisition had occurred on March 31, 2025. The
unaudited pro forma statements of profit or loss for the three-month period ended March 31, 2025 and for the year ended December 31, 2024 have been prepared to give pro forma effect to the PEPASA Acquisition as if such transaction had
occurred on January 1, 2024.

3

Pro Forma Statements of Profit or Loss and Other Comprehensive Income (Amounts expressed in thousands of U.S. dollars)

|                                                                                          |     | For the three-month period ended March 31, 2025 |          |   |     |        |         |   |     |                  |        |   |     |                   |          |   |
|:-----------------------------------------------------------------------------------------|:----|:------------------------------------------------|---------:|:--|:----|:-------|--------:|:--|:----|:-----------------|-------:|:--|:----|:------------------|---------:|:--|
|                                                                                          |     | Vista Argentina                                 |          |   |     | PEPASA |         |   |     | PEPASA Pro forma 
 adjustments      |        |   |     | Vista Argentina + 
 PEPASA Pro forma  
 Consolidated      |          |   |
| Revenue from contracts with customers                                                    |     |                                                 |  436,156 |   |     |        | 216,235 |   |     |                  |      — |   |     |                   |  652,391 |   |
| Cost of sales                                                                            |     |                                                 |          |   |     |        |         |   |     |                  |        |   |     |                   |          |   |
| Operating costs                                                                          |     |                                                 |  (32,518 | ) |     |        | (17