Rochussen was formerly J O Hambro Capital Management CEO, holding the position between 2008 and 2016. Prior to this he was CEO of Fleming Family Partners.
He will take up the position in July 2017, with Woolley standing down and moving to a non-executive position.
Chairman of Polar Capital Tom Bartlam said: “We are delighted to have attracted someone of Gavin’s experience to take over from Tim as CEO of the group. Gavin has a proven track record of successfully managing a boutique equity investment house and we are all excited at the opportunities in front of us as Gavin takes over the reins at Polar Capital.”
“We all owe Tim a great debt of gratitude for leading the firm, which he founded with Brian Ashford-Russell and Caledonia Investments plc, so well over the past seven years and having grown assets under management from £1.2bn when he returned, as CEO in November 2009 to £8.4bn at 31 December 2016,” he continued. “We are also pleased that that Tim will continue to serve on the Board and that the Group will continue to benefit from his expertise.”