Rhätische Bahn - RhB
This company has the largest network of all Swiss Private Railways. It runs on metre gauge lines. They operate trains in South-Eastern Switzerland. One of the lines crosses the Italian border, providing a link to Tirano. The Berninabahn is operated under DC, the rest of the system operates at 11kV 16 2/3Hz the same as he SBB. The DC line Castione-Cama (part of Bellinzona-Mesocco) was handed over to museum railway SEFT in 2003.
Since 2006 this company is a member of RAILplus AG, a company set up by a number of private railways to coordinate marketing, maintenance, etc.
They also operate the Disentis Muster to St Moritz section of the Glacier Express service in conjunction with the Matterhorn Gotthard Bahn (MGB).

one of many advertisng liveries featured on th RhB