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