GroupM includes a number of media agencies but its main driver is EssenceMediacom, a merger between Juhl's tech specialist Essence and Mediacom, the long-term driver of Group M's growth with its formidable bargaining power and new business record. It seemed a strange decision by WPP CEO Mark Read to put the much smaller Essence, highly dependent on tech giants, on top of the mighty Mediacom in 2022. The media business has changed to a degree since then but most observers still think Mediacom should have been the senior partner and provided the leader in that arrangement.