Cranmer has signalled his intention to step down from the role of worldwide chief executive of the WPP-owned research company and is serving out his notice. It is understood he has no plans for his next career move, but has decided that he has done all he can at Research International.
He joined the company in March 2006 and manages 2,500 employees in 50 countries. He has restructured the business and introduced new operational practices.
Cranmer has spent more than two decades as a leading media industry figure, and is one of its best-regarded thinkers. His name has been linked to the vacant commercial role at ITV, but this is not thought to be part of his plans.
Cranmer was unavailable for comment.