| CHF million | 
 | Financial year ended 30.06.2025 | 
 | Financial year ended 30.06.2024 | |
| Operating revenues | 
 | 
 | 
 | 
 | 
 | 
| Dividend income from investments | 
 | 36.5 | 
 | 40.1 | |
| Interest from loans to Group companies | 
 | 
 | 5.9 | 
 | 5.9 | 
| Other financial income | 
 | 
 | –0.1 | 
 | 0.0 | 
| Total operating revenues | 
 | 
 | 42.3 | 
 | 46.0 | 
| Operating expenses | 
 | 
 | 
 | 
 | 
 | 
| Financial expenses | 
 | –3.3 | 
 | –3.3 | |
| Cost of services provided by Group companies | 
 | 
 | –0.1 | 
 | –0.1 | 
| Personnel expenses | 
 | 
 | –2.6 | 
 | –3.2 | 
| Other operating expenses | 
 | –0.9 | 
 | –0.8 | |
| Direct taxes | 
 | –0.1 | 
 | 0.1 | |
| Total operating expenses | 
 | 
 | –7.0 | 
 | –7.3 | 
| Net profit for the period | 
 | 
 | 35.3 | 
 | 38.7 |