Aviva PLC, parent company of West Des Moines-based Aviva USA, on Tuesday announced it has named a new CEO, Bloomberg reported. Mark Wilson, 46, a former CEO of AIA Group Ltd., will lead the London-based insurance group beginning in January. He will replace John McFarlane, who has served as interim CEO for the past six months since the resignation of Andrew Moss, who quit in May following a shareholder revolt over pay and strategy. McFarlane has pledged to exit 16 businesses, among them Aviva USA, that together tie up $9.5 billion of capital as the insurer seeks to build up reserves depleted by the European sovereign debt crisis.