The core activity of Allemann St. Peter encompasses three main areas:
1. **Transportation**: The company offers transportation services, including the transport of goods and people.
2. **Quarry and Landfill**: Allemann Kies GmbH operates a quarry and landfill, where gravel and other construction materials are produced and stored.
3. **Bus Services**: Pfosi Arosa Bus AG provides bus transportation services, including a shuttle service in Arosa.
Overall, the core activity of the company can be described as a service and production company in the fields of transportation, logistics, and construction.