(ShareCast News) - Panmure Gordon's chairman Ed Warner will step down from the role at the company's annual general meeting in May. Warner, who joined the board of the stockbroker and investment bank in 2009, is leaving to concentrate on his other business interests.The company said a search for his replacement was underway and a further announcement will be made in due course.Chief executive officer Phillip Wale said: "Ed has chaired the company with professionalism and dedication and we are grateful for his contribution over the past six years and wish him well with his many other roles in the future."