Cello Group plc is a United Kingdom-based holding company. The Company, along with its subsidiaries, is engaged in the market research, consulting and direct marketing services. The Company operates in two segments: Cello Health and Cello Signal. The Cello Health division provides market research, consulting and communications services principally to the Company�s pharmaceutical and healthcare clients. The Cello Signal division provides market research and direct communications services principally to the Company�s consumer facing clients. The Company�s subsidiaries include 2CV Limited, Cello Group Inc, Cello Business Sciences Limited, Chiaros Holdings Limited, Fenix Media Limited, Insight Medical Research Limited, Leapfrog Research and Planning Limited, MedErgy Europe Limited and Worldwide Promedica Inc.