v3.25.4
Income taxes (Tables)
12 Months Ended
Dec. 31, 2025
Income taxes  
Income tax expense reconciled to loss

For the Year Ended

December 31, 

In CHF thousands

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2023

Loss before income tax

 

(70,447)

 

(50,913)

 

(54,223)

Tax benefit calculated at the domestic rates applicable in the respective countries

 

(9,586)

 

(6,925)

 

(7,371)

(Income not subject to tax)/expenses not deductible for tax purposes

 

598

 

692

 

611

Effect of unused tax losses and tax offsets not recognized as deferred tax assets

 

8,988

 

6,236

 

6,770

Effective income tax rate expense

 

 

3

 

10

Unrecognized deductible temporary differences, unused tax losses and unused tax credits

As of

December 31, 

In CHF thousands

  ​ ​ ​

2025

  ​ ​ ​

2024

Unrecognized deductible temporary differences, unused tax losses and unused tax credits

 

  ​

 

  ​

Deductible temporary differences, unused tax losses and unused tax credits for which no deferred tax assets have been recognized are attributable to the following:

 

  ​

 

  ​

Tax losses

 

362,290

 

343,589

Deductible temporary differences related to:

 

  ​

 

  ​

Retirement benefit plan

 

8,645

 

8,844

Total

 

370,935

 

352,433

Tax losses carry forwards and respective expiry dates

As of

December 31, 

In CHF thousands

2025

2024

Tax losses split by expiry date:

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

December 31, 2025

48,894

 

December 31, 2026

 

 

December 31, 2027

 

57,824

 

57,824

 

December 31, 2028

 

75,204

 

75,204

 

December 31, 2029

 

66,936

 

66,936

 

December 31, 2030

 

48,883

 

48,883

 

December 31, 2031

 

45,848

45,848

December 31, 2032

67,595

Total unrecorded tax loss carryforwards

 

362,290

 

343,589