The five companies are the National Theatre of Scotland, the Royal Scottish National Orchestra, Scottish Ballet, theScottishChamberOrchestra and Scottish Opera.
The new building will also house Glasgow City Council's music education service and will be used by music organisations such as Celtic Connections and theScottishChamberOrchestra.
TheScottishChamberOrchestra then takes over on Sunday night for one of the biggest live concerts in the world, as many tens of thousands of people watch its fireworks concert at Edinburgh Castle.