Company: VIST
Filing Date: 2025-06-02
Form Type: 6-K
Source: 0001193125-25-132874
Chunk: 1

Company: Vista Energy, S.A.B. de C.V.
Filing Date: 2025-06-02
Form: 6-K
Chunk 1
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 and NGL 
 (MMbbl)     |       |     | Gas     
 (MMboe) |      |     | Total   
 (MMboe) |       |
| Net proved developed   |     |             |  54.7 |     |         |  4.4 |     |         |  59.1 |
| Net proved undeveloped |     |             |  75.8 |     |         |  8.4 |     |         |  84.2 |
| Total net proved       |     |             | 130.5 |     |         | 12.8 |     |         | 143.3 |

P1 reserves valuation The estimated future net cash flows attributable to PEPASA’s interests in the P1 reserves as of December 31, 2024, discounted at 10% per annum, amounted to 2,037 $MM. Future net cash flows were calculated by applying prices of oil, NGL (Natural Gas Liquids) and gas (calculated as the unweighted arithmetic average of the first-day-of-the-monthprice for each month within the 12-monthperiod prior to the end of the reporting period, unless prices were defined by contractual agreements) to estimated future production of proved oil, NGL and gas reserves as of the date reported, less the estimated future expenditures (based on current costs) to be incurred in developing and producing the proved reserves. Future net cash flows were then discounted using a factor of 10% per annum. 1

The proved reserves as of December 31, 2024, were calculated using a price of 69.4 $/bbl for oil, 25.7 $/boe for LPG and 4.1 $/mcf for natural gas. Such prices are consistent with SEC regulations. The estimated certified future net cash flows attributable to PEPASA’s interests in the P1 reserves as of December 31, 2024, are summarized below:

| Future net cash flows (Cumulative $MM) |     | Undiscounted |       |     | Discounted at 10% p.a. |       |
| Proved developed                       |     |              | 1,678 |     |                        | 1,107 |
| Proved undeveloped                     |     |              | 1,916 |     |                        |   930 |
| Total proved                           |     |              | 3,594 |