Orano - Annual Activity Report 2025 121 SUSTAINABILITY STATEMENT 4 Societal and environmental challenges at the heart of the strategy 4.1.1 General information on the sustainability statement 4.1.1.1 General basis Consolidated sustainability statement at the Orano level The Orano sustainability statement was prepared according to the legal and regulatory requirements following the transposition of the European directive on the disclosure of corporate sustainability information (“CSRD Directive”) and in accordance with the European sustainability Reporting Standards (ESRS) issued by the European Financial Reporting Advisory Group (EFRAG) and adopted by the European Union for the reporting period from January 1, 2025, to December 31, 2025. The sustainability statement, consolidated at group level, was prepared under the responsibility of the Board of directors. It was approved and authorized for disclosure on February 19, 2026. The sustainability statement was prepared in the context of the second-time application of the legal and regulatory requirements resulting from the transposition of the CSRD Directive and under regulatory change (simplification of the Taxonomy, Omnibus directive). This second year is characterized by: ● the group did not anticipate any future regulatory changes; it strictly applied the current approved texts; ● changes have been made to the definitions and rules for consolidating the sustainability statement between the practices applied in previous financial years and this sustainability statement, as specified in Section 4.1.1.1 General basis; in particular concerning joint operations over which the group has no operational control; ● some information required by the ESRS on material sub-topics is not available; ● for the indicators relating to radiation protection, there is a time lag insofar as the data for the whole of 2025 are not yet available (see the details provided in the paragraph Time consistency with the financial statements); ● some data may be estimated at the end of the year ended December 31, 2025. These methodological limitations, in particular the use of estimates to calculate scope 3 greenhouse gas (GHG) emissions, radioactive waste, etc., are specified in the paragraph Publication of information relating to special circumstances. The estimates, uncertainties and deviations from the requirements of the standard are set out below and detailed for each indicator table in a Methodological precision Section. Orano is part of a continuous improvement approach in this reporting and communication exercise. Time consistency with the financial statements The sustainability statement is established over the same time horizon as the financial statements (from January 1 to December 31, 2025), except for the following indicators: ● group-specific indicators related to radiation protection for employees and external contractors, consolidated over a rolling 12-month period from July to June (i.e. a 6-month delay compared to the financial year) (see Section 4.3.1.2). Estimates cannot be made due to the specific nature of these indicators; ● the indicators related to ethics incidents in Section 4.3.1.6 are consolidated over a rolling 12 months from November to November in order to be ready for publication. The items for December 2025 will be recognized in the 2026 financial year; ● the workplace accident frequency rate is calculated with a onemonth time lag in terms of hours worked. Scope of consolidation The scope of the sustainability statement is based on the group’s financial consolidation and is composed of: ● fully consolidated subsidiaries over which the group exercises exclusive control; ● equity interests in joint operations: ● a joint operation over which the group exercises operational control (McClean), and ● those over which the group does not exercise operational control (McArthur River, Cigar Lake and Key Lake operated by Cameco). The group does not have operational control of entities accounted for using the equity method. Current ESRS require an “additive method” based on: ● financial control for E1 and E4, plus operational control adjustment only for the material indicators concerned (namely: E1-5 Energy consumption, E1-6 GHG emissions and E4-SBM-3 – List of physical sites under operational control); ● financial control for E3 indicators (Water resources – E3-4 > 28a, E3-4 > AR32, E3-4 > 28c) and E5 indicators (Total quantity of radioactive waste produced during the year – E5-5 > 39). For reasons of comparability with respect to environmental data, Orano decided to present E3 and E5 using the same scope as E1 and E4, which differs from the requirements of the standard. On these Data Points, the McClean JV was 100% integrated while the MCA, KL and CGL JVs were omitted. According to the ESRS guidelines, each of these entities should have been integrated up to the share of financial integration.
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