
| EMISSIONS (1) | Unit | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| GRI 305-1, 305-2, 305-4, 305-5, 305-7, GRI O&G 11.3.2 SASB EM-EP-110a.1, EM-EP-110a.2, EM-EP-120a.1, EM-EP-420a.2 | ||||||
| Scope 1 & 2 GHG emissions | ||||||
| Absolute GHG emissions (2) | ||||||
| Scope 1 | MtCO2e | 292 | 289 | 278 | 203 | 186 |
| Scope 2 - location-based | MtCO2e | 67 | 66 | 30 | 31 | 38 |
| Scope 2 - market-based | MtCO2e | n.a | n.a | n.a | 19 | 9 |
| Total emissions(3) | MtCO2e | 359 | 355 | 308 | 222 | 195 |
| GHG emissions Intensity (2)(3)(4) | ||||||
| Scope 1 | kg CO2e/boe | 19.6 | 14.7 | 14.1 | 8.1 | 6.5 |
| Scope 2 | kg CO2e/boe | 4.5 | 3.4 | 1.5 | 0.8 | 0.3 |
| Total emissions intensity | kg CO2e/boe | 24.1 | 18.1 | 15.6 | 8.8 | 6.8 |
| Absolute GHG emissions by type of operation | ||||||
| Conventional (5) | MtCO2e | 254 | 215 | 59 | 0 | 0 |
| Shale | MtCO2e | 106 | 140 | 249 | 222 | 195 |
| GHG emission intensity by type of operation (4) | ||||||
| Conventional (5) | kg CO2e/boe | 36 | 38 | 39 | 0 | 0 |
| Shale | kg CO2e/boe | 13 | 10 | 14 | 8.8 | 6.8 |
| Scope 1 GHG emissions | ||||||
| Absolute GHG emissions by source | ||||||
| Venting (6) (process + other) | MtCO2e | 109 | 86 | 41 | 12 | 15 |
| i. Venting (other emissions) | MtCO2e | 0 | 0 | 0 | 0 | 0 |
| ii. Venting (process) | MtCO2e | 109 | 86 | 41 | 12 | 15 |
| Stationary combustion (7) | MtCO2e | 101 | 114 | 90 | 87 | 85 |
| Flaring | MtCO2e | 57 | 65 | 134 | 97 | 79 |
| Fugitives | MtCO2e | 25 | 25 | 11 | 7 | 8 |
| Hydrocarbon gas flared | MMm3 | 13 | 16 | 40 | 25 | 24 |
| GHG emissions intensity by source (4) | ||||||
| Venting (6) (process + other) | kg CO2e/boe | 7.3 | 4.4 | 2.1 | 0.5 | 0.5 |
| i. Venting (Other emissions) | kg CO2e/boe | 0 | 0 | 0 | 0 | 0 |
| ii. Venting (process) | kg CO2e/boe | 7.3 | 4.4 | 2.1 | 0.5 | 0.5 |
| Stationary combustion | kg CO2e/boe | 6.8 | 5.8 | 4.6 | 3.5 | 3.0 |
| Flaring | kg CO2e/boe | 3.8 | 3.3 | 6.8 | 3.8 | 2.8 |
| Fugitives | kg CO2e/boe | 1.7 | 1.3 | 0.5 | 0.3 | 0.3 |
| GHG emissions by gas (8) | ||||||
| CO2 | Mt CO2e | 150 | 170 | 213 | 177 | 156 |
| CH4 | Mt CO2e | 142 | 118 | 64 | 26 | 30 |
| N2O | Mt CO2e | 1 | 1 | 1 | 1 | 1 |
| Methane emissions metrics | ||||||
| Percentage of methane from total Scope 1 emissions | % | 49 | 41 | 23 | 13 | 16 |
| Methane emissions intensity (4) | kgCH4/boe | 0.38 | 0.24 | 0.13 | 0.04 | 0.04 |
| Scope 2 GHG emissions (8)(9) | ||||||
| GHG emissions by location (10) | ||||||
| Medanito | MtnCO2e | 14 | 16 | 3 | Asset transferred | Asset transferred |
| Entre Lomas + BPO + BPE + CAN | MtnCO2e | 53 | 50 | 27 | 19 | 9 |
| Estimated carbon dioxide emissions embedded in proved hydrocarbon reserves | ||||||
| Estimated carbon dioxide emissions embedded in proved hydrocarbon reserves | MtnCO2e | n.a | n.a | n.a | n.a | 65,219 |
| GHG emissions reduction plan | ||||||
| Total capital expenditure incurred by the GHG emissions reduction plan | $MM | 6.8 | 3.2 | 26.6 | 9.5 | 12.4 |
| Air quality - Significant air emissions (11) | ||||||
| Nitrogen oxides (NOX) | Tn | n.a | n.a | 285 | 299 | 256 |
| Sulfur oxides (SOX) | Tn | n.a | n.a | 4 | 5 | 2 |
| Volatile organic compounds (VOCs) (12) | Tn | n.a | n.a | 4,588 | 3,972 | 8,319 |
| Particulate matter (PM10) | Tn | n.a | n.a | 76 | 75 | 51 |
| Carbon Monoxide (CO) | Tn | n.a | n.a | 212 | 175 | 145 |
| (1) The scope of the emissions indicators was limited to Vista Energy Argentina S.A.U operated assets in Argentina. | ||||||
| (2) In 2026, Vista adjusted its 2020 GHG emissions baseline to reflect a change in its operational boundary following the transfer of six conventional assets in 2023. Following the adjustment, baseline GHG emissions intensity was 36.6 kgCO2e/boe and baseline absolute emissions were 183 MtnCO2e. The adjustment affects only the baseline used to assess emissions performance over time and does not modify previously reported emissions data. | ||||||
| (3) Considers emissions Scope 1 and Scope 2 location based until 2023 and Scope 2 market based as of 2024. | ||||||
| (4) Intensity metrics were calculated based on gross production until 2023 and are based on total production as of 2024. | ||||||
| (5) For the year 2023, conventional emissions correspond to January and February emissions from conventional assets transferred to Tango. | ||||||
| (6) Venting emissions are represented by processing emissions (glycol dehydrators, pneumatic devices, storage tanks, chemical injection pumps and maintenance and turnaround). | ||||||
| (7) In 2025, mobile combustion emissions (2 MtCO2e) were not material and are included in stationary combustion totals. | ||||||
| (8) Biogenic CO₂ emissions and other GHG (HFCs, PFCs, SF₆ and NF₃) are not considered material. | ||||||
| (9) Emission factors by gas type are not available for electricity purchased from the Argentine Interconnection System (SADI). | ||||||
| (10) Considers emissions Scope 2 location based until 2023 and Scope 2 market based as of 2024. | ||||||
| (11) Emissions of hazardous air pollutants (HAPs) and persistent organic pollutants (POPs) are not considered material for our operations, as they are not typically associated with the nature of our activities. | ||||||
| (12) For the year 2025 increase was driven by higher production and operational adjustments, alongside lower methane emissions. | ||||||
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