Derivative financial instruments (Tables)
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12 Months Ended |
Dec. 31, 2025 |
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| Derivative financial instruments |
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| Schedule of net value of the power purchase agreements in consolidated statements of financial position |
The net value of the energy agreements as of December 31, 2025 and 2024 is presented in the consolidated statements of financial position as follows: | | | | | | | | | | | | | | | 2025 | | | Other financial
assets (Note 9) | | Other financial
liabilities (Note 20) | | | Non- | | | | | | Non- | | | | | | | Current | | Current | | Total | | Current | | Current | | Total | Derivative not designated as hedging instruments | | 3,079 | | — | | 3,079 | | (38,341) | | — | | (38,341) | Power Purchase agreements | | 3,079 | | — | | 3,079 | | — | | — | | — | EDF energy contract | | | | | | | | (38,341) | | | | (38,341) | Derivative designated as hedging instruments | | — | | — | | — | | (6,857) | | — | | (6,857) | Power Purchase agreements | | | | | | | | (6,857) | | — | | (6,857) | Total | | 3,079 | | — | | 3,079 | | (45,198) | | — | | (45,198) |
| | | | | | | | | | | | | | | 2024 | | | Other financial
assets (Note 9) | | Other financial
liabilities (Note 19) | | | Non- | | | | | | Non- | | | | | | | Current | | Current | | Total | | Current | | Current | | Total | Derivative not designated as hedging instruments | | 4,707 | | 69 | | 4,776 | | — | | (13) | | (13) | Derivative designated as hedging instruments | | 293 | | — | | 293 | | (1,086) | | (842) | | (1,928) | Total | | 5,000 | | 69 | | 5,069 | | (1,086) | | (855) | | (1,941) |
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| Schedule of unrealized and realized gains (losses) related to the derivative instruments |
| | | | | | | | | | | 2025 | | 2024 | | | Unrealized gain (loss) recognized in Other comprehensive loss | | Realized gain (loss) reclassed from Other comprehensive loss to profit and loss | | Unrealized gain (loss) recognized in Other comprehensive loss | | Realized gain (loss) reclassed from Other comprehensive loss to profit and loss | Total | | (5,785) | | (1,105) | | (3,471) | | 1,007 |
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| Schedule of purchase commitments. |
| | | | | | | | | | | | | 2025 | | | Less than 1 year | | Between 1-2 years | | Between 2-5 years | | After 5 years | | Total | Total purchase commitments (MWh) | | 178,248 | | 164,782 | | 861,452 | | 2,109,705 | | 3,314,187 |
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| Schedule of key assumptions about fair value of derivative financial instruments. |
| | | | | | 2025 | Energy Price ($/MWh) | | 63-72 | | Cap Volatility | | 25.4 | % |
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| Schedule of key assumptions energy, CO2 and Silicon Index price. |
| | | | | | 2025 | Projected French energy prices ($/MWh) | | 59-84 | | Projected Silicon Metal index prices ($/MT) | | 2,629-5,852 | |
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| Schedule of key assumptions French energy contract. |
| | | | | | | | | | | | | | | Sensitivity on | | Sensitivity on | | | | | energy price | | silicon metal index price | | | Fair Value | | Decrease | | Increase | | Decrease | | Increase | | | December 31, 2025 | | by 10% | | by 10% | | by 10% | | by 10% | | | | | | | | | | | | EDF energy contracts | | (39,239) | | (68,102) | | 75,477 | | 24,356 | | (27,482) |
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| Schedule of total purchase commitments |
| | | | | | | | | | | | | 2025 | | | Less than 1 year | | Between 1-2 years | | Between 2-5 years | | After 5 years | | Total | Total purchase commitments (MWh) | | 3,627,032 | | 3,646,180 | | 9,023,577 | | 8,250,000 | | 24,546,789 |
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