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v3.25.1

Basis of preparation (Details) € in Thousands, $ in Millions |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended | 121 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 24, 2023 EUR (€) | Oct. 24, 2023 USD ($) | Sep. 02, 2022 EUR (€) | Oct. 31, 2023 EUR (€) | Feb. 28, 2023 EUR (€) | Dec. 31, 2025 EUR (€) | Dec. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2021 EUR (€)
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  | € 176,242 | € 147,740 |  | € 60,740 |  |  |  |
Capital increases | € 223,300 | $ 235.8 |  |  |  |  | 0 | 353,377 |  | 46,231 |  | € 557,200 |  |
Proceeds from borrowings |  |  |  |  |  |  |  |  |  |  |  | 175,000 |  |
Proceeds from research tax credit |  |  |  |  |  |  | 4,493 | 4,476 |  |  |  | 35,600 |  |
Net proceeds from sale of royalty certificates |  |  | € 2,931 |  |  |  | 0 | 0 |  | 2,931 |  | 2,900 |  |
Cash and cash equivalents |  |  |  |  |  |  | 144,221 | 251,942 | [1] | 26,950 | [1] | 251,942 | [1] | € 60,701
Non-current convertible loans notes |  |  |  |  |  |  | 23,370 | 21,643 | [1] | 0 | [1] | 21,643 | [1] |
Current convertible loans notes |  |  |  |  |  |  | 21,574 | 29,605 | [1] | 19,957 | [1] | 29,605 | [1] |
Oceane conversion option |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible loans notes |  |  |  |  |  |  |  |  |  | 19,957 |  |  |  |
Non-current convertible loans notes |  |  |  |  |  |  |  |  |  | € 19,332 |  |  |  |
Current convertible loans notes |  |  |  |  |  |  | 19,957 |  |  |  |  |  |  |
Heights convertible notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible loans notes |  |  |  |  |  |  | 21,574 | 29,605 |  |  |  | 29,605 |  |
Non-current convertible loans notes |  |  |  |  |  |  |  | € 20,652 |  |  |  | 20,652 |  |
Current convertible loans notes |  |  |  |  |  |  | € 29,605 |  |  |  |  |  |  |
Conditional advances BPI |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from government grants |  |  |  |  |  |  |  |  |  |  |  | 17,100 |  |
Proceeds from conditional advances |  |  |  |  |  |  |  |  |  |  |  | € 1,800 |  |
Registered direct offering |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital increases |  |  |  | € 223,300 | € 130,000 |  |  |  |  |  |  |  |  |
Major revenue transactions | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from research tax credit |  |  |  |  |  | € 5,700 |  |  |  |  |  |  |  |
[1] | 1 In application of the Amendments to IAS 1 Presentation of Financial Statements – Classification of Liabilities as Current or Non-current, and Non-current Liabilities with Covenants, the non-current portion of the OCEANE bonds as of December 31, 2022, amounting to €19,332 thousand, and the non-current portion of the Heights convertible notes as of December 31, 2023, amounting to €20,652 thousand, were reclassified within the current liabilities (Convertible loan notes) as of December 31, 2022 and 2023 respectively (see Note 2).

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