Viking Venture, a private equity firm, completed the acquisition of Workbuster and Grade from Monterro, a software investment company. Financial terms were not disclosed. "We find the market for HR software very attractive. Our aim is to become the market leader through organic growth and consolidation. Workbuster and Grade are a perfect match to kick off an exciting growth journey. They deliver digital solutions to a space where this is becoming increasingly important," Joar Welde, Viking Venture Partner.