Cello Health plc, together with its subsidiaries, provides market research, consulting, and direct marketing services in the United Kingdom and internationally. It operates in two segments, Cello Health and Cello Signal. The Cello Health segment offers market research, consulting, and communications services to the pharmaceutical and healthcare clients. The Cello Signal segment provides market research and direct communications services principally to consumer and business-to-business clients. Cello Group plc was incorporated in 2004 and is headquartered in London, the United Kingdom.