Share-based compensation (Tables)
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12 Months Ended |
Dec. 31, 2025 |
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| Share-based compensation |
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| Schedule of effect of share-based compensation on profit or loss |
| | | | | | | | | 2025 | | 2024 | | 2023 | Research and development | | 970 | | 2,089 | | 30,190 | General and administration | | 69,850 | | 173,194 | | 250,010 | Total share-based compensation for continuing operations | | 70,820 | | 175,283 | | 280,200 |
| | | | | | | | | 2025 | | 2024 | | 2023 | Research and development | | — | | 113,709 | | 540,470 | General and administration | | — | | 213,972 | | 973,797 | Total share-based compensation for discontinued operations | | — | | 327,681 | | 1,514,267 |
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| Employee share option plans (ESOP) |
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| Share-based compensation |
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| Schedule of share options granted |
During the year 2023, the Group granted the following options with vesting over 4 years and a 10-year exercise period at the grant date as described in the table below. Grant conditions relating to the strike price have been amended during the year ended December 31, 2023. | | | | | | | | | | | | | | | | | Number of share | | Number of | | | | | | | | | options granted | | share | | Number of | | | | | | | for continuing | | options repriced | | options exercised | | | Strike price at | | Expiry date at | | and discontinued | | to CHF 0.043 on | | under | | | grant date | | grant date | | operations | | November 27 2023 | | the DSPPP | January 1, 2023 | | 0.101 | | Dec. 31, 2032 | | 436,677 | | — | | — | May 12, 2023 | | 0.13 | | May 11, 2033 | | 12,736,209 | | 12,736,209 | | 12,527,235 | July 1, 2023 | | 0.106 | | June 30, 2033 | | 147,695 | | — | | — | Total 2023 | | | | | | 13,320,581 | | 12,736,209 | | 12,527,235 |
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| Schedule of movements in number of options outstanding |
| | | | | | | | | | | | | | | Average | | | | Average | | | | Average | | | | | strike price | | | | strike price | | | | strike price | | | | | (CHF) | | 2025 | | (CHF) | | 2024 | | (CHF) | | 2023 | At January 1 | | 0.10 | | 8,006,791 | | 0.32 | | 1,570,346 | | 0.55 | | 777,000 | Exercised under the DSPPP | | — | | — | | — | | — | | 0.043 | | (12,527,235) | Granted | | — | | — | | 0.05 | | 6,439,124 | | 0.13 | | 13,320,581 | Forfeited | | 1.20 | | (50,027) | | 0.05 | | (2,679) | | — | | — | At December 31 | | 0.09 | | 7,956,764 | | 0.10 | | 8,006,791 | | 0.32 | | 1,570,346 |
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| Schedule of outstanding share options |
| | | | | | | | | | | At December 31, 2025 | | Range of strike prices (CHF) | Expiry date | | 0.043 to 0.106 | | 0.13 | | 0.14 to 0.99 | | 1.00 to 3.00 | | Total | 2027 | | — | | 18,885 | | 11,385 | | 45,011 | | 75,281 | 2028 | | — | | 59,530 | | 26,085 | | 5,292 | | 90,907 | 2029 | | — | | — | | — | | 110,500 | | 110,500 | 2030 | | — | | 10,000 | | — | | 44,854 | | 54,854 | 2031 | | — | | 30,000 | | — | | 83,888 | | 113,888 | 2032 | | 436,677 | | 192,928 | | 108,955 | | — | | 738,560 | 2033 | | 356,669 | | — | | — | | — | | 356,669 | 2034 | | 6,416,105 | | — | | — | | — | | 6,416,105 | Total | | 7,209,451 | | 311,343 | | 146,425 | | 289,545 | | 7,956,764 |
| | | | | | | | | | | At December 31, 2024 | | Range of strike prices (CHF) | Expiry date | | 0.043 to 0.106 | | 0.13 | | 0.14 to 0.99 | | 1.00 to 3.00 | | Total | 2025 | | — | | — | | 25,000 | | 4,687 | | 29,687 | 2027 | | — | | 56,655 | | 11,385 | | 7,241 | | 75,281 | 2028 | | — | | 59,530 | | 26,085 | | 5,292 | | 90,907 | 2029 | | — | | — | | — | | 110,500 | | 110,500 | 2030 | | — | | 10,000 | | — | | 44,854 | | 54,854 | 2031 | | — | | 40,000 | | — | | 73,888 | | 113,888 | 2032 | | 436,677 | | 192,928 | | 108,955 | | — | | 738,560 | 2033 | | 356,669 | | — | | — | | — | | 356,669 | 2034 | | 6,436,445 | | — | | — | | — | | 6,436,445 | Total | | 7,229,791 | | 359,113 | | 171,425 | | 246,462 | | 8,006,791 |
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| Schedule of inputs to option pricing model |
| | | | | | | | 2024 | | 2023 | | Weighted average share price per share at the grant date | | CHF 0.057 | | CHF 0.14 | | Weighted average strike price per share | | CHF 0.050 | | CHF 0.13 | | Weighted average volatility (1) | | 64.62 | % | 58.16 | % | Weighted average expected option life (years) | | 6.25 | | 6.25 | | Dividend yield | | — | | — | | Weighted average annual risk-free rate | | 0.84 | % | 0.86 | % |
(1)The expected volatility is based on historical share prices of the company
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| Deferred Strike Price Payment Plan (DSPPP) |
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| Share-based compensation |
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| Schedule of movements in number of options outstanding |
| | | | | | | | | | | | | | | Average | | | | Average | | | | Average | | | | | deferred strike | | | | deferred strike | | | | deferred strike | | | | | price payment | | | | price payment | | | | price payment | | | | | (CHF) | | 2025 | | (CHF) | | 2024 | | (CHF) | | 2023 | At January 1 | | 0.09 | | 29,950,268 | | 0.09 | | 29,958,807 | | 0.13 | | 17,438,883 | Forfeited | | 0.07 | | (45,578) | | 0.09 | | (8,539) | | 0.13 | | (7,311) | Granted - exercise of ESOP & ESC | | — | | — | | — | | — | | 0.043 | | 12,527,235 | At December 31 | | 0.09 | | 29,904,690 | | 0.09 | | 29,950,268 | | 0.09 | | 29,958,807 |
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| Schedule of outstanding share options |
| | | | | | | At December 31, 2025 | | Range of strike prices (CHF) | Expiry date | | 0.043 | | 0.13 | | Total | 2033 | | — | | 17,412,752 | | 17,412,752 | 2034 | | 12,491,938 | | — | | 12,491,938 | Total | | 12,491,938 | | 17,412,752 | | 29,904,690 |
| | | | | | | At December 31, 2024 | | Range of strike prices (CHF) | Expiry date | | 0.043 | | 0.13 | | Total | 2032 | | — | | 17,427,207 | | 17,427,207 | 2033 | | 12,523,061 | | — | | 12,523,061 | Total | | 12,523,061 | | 17,427,207 | | 29,950,268 |
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