Annual Activity Report 2025

2 SITUATION AND ACTIVITIES OF THE COMPANY AND ITS SUBSIDIARIES DURING THE PAST FINANCIAL YEAR The group’s businesses

MINERAL RESERVES IN THE GROUND – IN METRIC TONS OF URANIUM (TU) (ESTIMATES AT THE END OF 2025)

Total reserves

Proven reserves

Probable reserves

Ore (kt)

Grade (%)

Metal (tU)

Ore (kt)

Grade (%)

Metal (tU)

Metal (tU)

Yield (%)

Holding (%)

Orano’s share (tU)

Deposit

Cigar Lake Key Lake McArthur

264 14.47 38,159

215 13.09 28,172 66,331 98.90% 40.45% 26,538

61

0.44

270

0

0

0

270 95.00% 16.67%

43

1,942

5.64 109,485

484

5 23,784 133,269 99.20% 30.20% 39,919 4.02 1,231 1,554 98.83% 77.50% 1,191

McClean

92

0.35

324

31

TOTAL CANADA Katco – Muyunkum Katco – Tortkuduk TOTAL KAZAKHSTAN

2,359 6.28 148,237

730

7.28 53,187 201,424 99.09%

-

67,690

0 0 0 0 0

0 0 0 0 0

0 1,026 0 14,584 0 15,610 0 131,567 0 131,567

0.06

638

638 84.65% 51.00% 275

0.11 15,868 15,868 89.43% 51.00% 7,237

0.11 16,506 16,506 89.25%

-

7,513

Zuuvch Ovoo

0.02 31,245 31,245 92,95% 90.00% 26,138

TOTAL MONGOLIA

0.02 31,245 31,245 92,95%

-

26,138

TOTAL (EXCLUDING NIGER) 2,359 6.28 148,237 147,907 0.07 100,938 249,175

-

- 101,341

Imouraren (1)

- - -

- - -

- - -

- - -

- - -

- - -

- - -

- - -

63.50%

- - -

Somaïr (2)

- -

TOTAL NIGER

TOTAL - 101,341 (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, Imouraren’s 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. 2,359 6.28 148,237 147,907 0.07 100,938 249,175 -

36

Orano - Annual Activity Report 2025