The corporation owns three major Northern Norwegian bus companies, Tromsbuss, Ofotens Bilruter and the operating subsidiary TIRB Rutene AS. The latter is responsible for regional routes in 17 municipalities in Troms using 124 buses, while Tromsbuss operates in the city bus in Tromsø and Ofotens Bilruter in Ofoten in Nordland. It became merged with TIRB in 2006 when the two former operators of Hurtigruten merged.
