The main changes in scope affecting sustainability reporting for 2025 are acquisitions by VINCI Construction, such as FM Conway and Hub Foundation (Soletanche Freyssinet), and the Rota dos Cristais highway concession linking Belo Horizonte and Cristalina in Brazil (VINCI Highways). The impact of these changes in scope is detailed in the sustainability report for the indicators to which they contribute materially.
In previous financial years, acquisitions made during the period were included in year Y+1 for environmental data only. For the transition year in 2025, environmental reporting includes data from companies acquired in both 2024 and 2025. The impact of this change in method accounts for approximately 3% of the Group’s carbon emissions (Scopes 1 and 2) in 2025.
Data on withdrawals of dewatering water from VINCI Construction quarries published in the 2024 sustainability report included estimates relating to geographical scopes outside France, mainly Canada, the United States and Eastern Europe. After further analysis in 2025, these estimates ended up differing significantly from actual levels, which depend on external factors that are difficult to assess, such as rainfall. In 2025, the Group decided to report data on dewatering water exclusively from quarries in France (accounting for nearly 75% of the total reported in 2024), where actual data is collected and subject to monitoring requirements. The Group continues to work with professional industry organisations on improving the reliability of these indicators. The impact of this adjustment on data reported in 2024 reduces the volume of dewatering water from quarries by 10,043 thousand cu. metres, which breaks down as shown in the table below:
| 2024 published | 2024 adjusted | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| (in thousands of cu. metres) | Water purchased from networks | Drilled water | Dewatering water | Total withdrawals | Water purchased from networks | Drilled water | Dewatering water | Total withdrawals | Difference in withdrawals |
| Concessions | 4,234 | 1,154 | - | 5,388 | 4,234 | 1,154 | - | 5,388 | - |
| VINCI Autoroutes | 752 | 278 | n/a | 1,030 | 752 | 278 | n/a | 1,030 | - |
| VINCI Airports | 3,428 | 874 | n/a | 4,302 | 3,428 | 874 | n/a | 4,302 | - |
| Other concessions | 53 | 2 | n/a | 55 | 53 | 2 | n/a | 55 | - |
| VINCI Construction (quarries) | n/a | n/a | 36,018 | 36,018 | n/a | n/a | 25,975 | 25,975 | -10,043 |
| Total | 4,234 | 1,154 | 36,018 | 41,406 | 4,234 | 1,154 | 25,975 | 31,363 | -10,043 |
Data on the tonnage of resource inflows used reported in the 2024 sustainability report include data on purchases made by subcontractors. In 2025, the scope of reported data was limited to the Group’s own activities. The impact of this adjustment on 2024 reported data reduces the volume of resources reported by 20,938 thousand tonnes, which breaks down as shown in the table below:
| (in thousands of tonnes) | 2024 published | 2024 adjusted | |||||
|---|---|---|---|---|---|---|---|
| Consumed resources | Recycled or reused resources | % recycled/ reused resources | Consumed resources |
Recycled or reused resources | % recycled/ | Difference in consumed resources | |
| Aggregates | 45,742 | 5,280 | 12% | 37,594 | 5,280 | 14% | −8,148 |
| Bitumen | 1,937 | 1,563 | −374 | ||||
| Asphalt mix | 9,729 | 1,758 | 18% | −9,729 | |||
| Concrete | 16,363 | 13,829 | −2,534 | ||||
| Steel | 716 | 215 | 30% | 591 | 215 | 36% | −125 |
| Wood | 107 | 79 | −28 | ||||
| Total | 74,593 | 7,252 | 10% | 53,656 | 5,495 | 10% | −20,938 |
In 2025, asphalt mix, previously reported in 2024 under “consumed resources”, was classified under “resources produced or extracted from quarries” as a result of improvements to reporting reliability.
Total energy consumption is expressed in megawatt hours (MWh), based on gross calorific value (GCV). The conversion factors used, drawn from version 23.5 of the Base Empreinte® database managed by French environment and energy management agency Ademe, are 10.66 kWh/litre for diesel fuel, 9.82 kWh/litre for petrol, 11.15 kWh/litre for used oils, 11,888 kWh/tonne for heavy fuel oil, 3,069 kWh/ tonne for coal (lignite), 10.66 kWh/litre for biofuels used as diesel substitutes (Oleo100, E85, HVO100, and others), 9.82 kWh/litre for other biofuels used as petrol substitutes, 9.78 kWh/litre for kerosene and 3,405 kWh/tonne for wood pellets.
Carbon intensity is calculated by dividing total greenhouse gas emissions (Scopes 1, 2 and 3) by the Group’s consolidated revenue as reported in its consolidated income statement (see the consolidated financial statements, page 338).
