v3.25.4
Intangible assets (Tables)
 12 Months Ended
Dec. 31, 2025
Intangible assets and goodwill [abstract]  
Schedule of Intangible Assets
(CHF in millions)Patents, licenses and other rightsSoftwareGoodwillTotal
Cost as of January 1, 202470.4 29.0 1.8 101.2 
Accumulated Amortization as of January 1, 2024(19.6)(17.1)— (36.6)
Net book value as of January 1, 202450.9 11.9 1.8 64.6 
Twelve-month period ended December 31, 2024
Opening net book value
50.9 11.9 1.8 64.6 
Additions1.4 3.0 — 4.5 
Amortization(4.7)(6.0)— (10.8)
Net book value as of December 31, 202447.5 9.0 1.8 58.3 
Cost as of December 31, 202471.8 32.1 1.8 105.7 
Accumulated Amortization as of December 31, 2024(24.3)(23.1)— (47.4)
Net book value as of December 31, 202447.5 9.0 1.8 58.3 
Twelve-month period ended December 31, 2025
Opening net book value
47.5 9.0 1.8 58.3 
Additions2.7 3.1 — 5.7 
Amortization(5.1)(4.7)— (9.8)
Net book value as of December 31, 202545.1 7.3 1.8 54.2 
Cost as of December 31, 202574.5 35.0 1.8 111.3 
Accumulated Amortization as of December 31, 2025(29.4)(27.7)— (57.1)
Net book value as of December 31, 202545.1 7.3 1.8 54.2