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Finance results, net (Details) - CHF (SFr) SFr in Thousands | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025
Finance result, net |  |
Net financial gains (losses) | SFr 668 | SFr (1,459)
Finance income associated with change in fair value of derivative financial assets | SFr 399 | SFr 1,145

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