Annual Activity Report 2025

Orano - Annual Activity Report 2025 37 SITUATION AND ACTIVITIES OF THE COMPANY AND ITS SUBSIDIARIES DURING THE PAST FINANCIAL YEAR 2 The group’s businesses MINERAL RESOURCES IN THE GROUND – IN METRIC TONS OF URANIUM (TU) (ESTIMATES AT THE END OF 2025) Deposit Measured resources Indicated resources Total measured and indicated resources Ore (kt) Grade (%) Metal (tU) Ore (kt) Grade (%) Metal (tU) Metal (tU) Holding (%) Orano’s share (tU) Cigar Lake 82 4.24 3,490 154 4.30 6,614 10,104 40.45% 4,087 Dawn Lake 0 0 0 184 3.75 6,886 6,886 42.53% 2,929 Kiggavik 0 0 0 10,418 0.47 48,953 48,953 66.19% 32,401 McArthur 72 1.94 1,394 63 1.88 1,177 2,572 30.20% 776 McClean 0 0 0 203 1.35 2,749 2,749 77.50% 2,130 Midwest 0 0 0 1,118 1.71 19,059 19,059 74.83% 14,262 Read Lake 0 0 0 0 0 0 0 21.76% 0 Shea Creek 0 0 0 526 2.67 14,014 14,014 50.90% 7,133 TOTAL CANADA 154.1 3.17 4,884 12,665 0.79 99,453 104,337 - 63,720 Bagombe 0 0 0 0 0 0 0 68.42% 0 TOTAL GABON 0 0 0 0 0 0 0 - 0 Katco 274.6 0.06 171.35 4,246 0.09 3,924 4,095 51.00% 2,089 TOTAL KAZAKHSTAN 274.6 0.06 171.35 4,246 0.09 3,924 4,095 - 2,089 Dulaan Uul 0 0 0 2,567 0.03 631 631 90.00% 568 Zuuvch Ovoo 0 0 0 16,695 0.02 3,215 3,215 90.00% 2,894 TOTAL MONGOLIA 0 0 0 19,262 0.02 3,846 3,846 - 3,461 Trekkopje 0 0 0 60,100 0.01 7,320 7,320 100.00% 7,320 TOTAL NAMIBIA 0 0 0 60,100 0.01 7,320 7,320 - 7,320 Bakouma 0 0 0 0 0 0 0 100.00% 0 TOTAL CAR 0 0 0 0 0 0 0 - 0 Nurlikum 0 0 0 25,546 0.025 6,382 6,382 45.00% 2,872 TOTAL UZBEKISTAN 0 0 0 25,546 0.02 6,382 6,382 - 2,872 TOTAL (EXCLUDING NIGER) 429 1.18 5,055 121,819 0.10 120,925 125,980 - 79,462 Imouraren (1) - - - - - - - 63.50% - Somaïr (2) - - - - - - - - - TOTAL NIGER - - - - - - - - - TOTAL 429 1.18 5,055 121,819 0.10 120,925 125,980 - 79,462 (1) The State of Niger withdrew the operating permit held by Imouraren SA on June 19, 2024. On December 19, 2024, Orano Mining initiated arbitration proceedings against the State of Niger in order to assert its rights and seek remedy for all of its losses resulting from the withdrawal of the operating permit. Given the withdrawal of the operating permit held by Imouraren SA on June 19, 2024, the resources and reserves of the Imouraren deposit are no longer included in Orano’s resources and reserves since December 31, 2024. As a reminder, proven reserves stood at 34,494 metric tons of uranium and the probable reserves stood at 136,932 metric tons of uranium, i.e. a total of 171,426 metric tons of uranium reserves at December 31, 2023 (95,527 metric tons of uranium - Orano share). The volume of indicated resources amounted to 22,368 metric tons of uranium at December 31, 2023 (14,204 metric tons of uranium - Orano share) and the volume of inferred resources amounted to 6,475 metric tons of uranium at December 31, 2023 (4,112 metric tons of uranium - Orano share). (2) Under the guise of nationalizing Somaïr, the State of Niger expropriated Orano on June 19, 2025 outside of any legal proceedings and without any compensation. Orano Mining has initiated two arbitration proceedings to assert its rights, in particular over the inventory corresponding to Somaïr’s production, as well as compensation for its losses resulting from unlawful acts committed by the State of Niger.

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