LyondellBasell announced that Robert G. Gwin, chairman of its board of directors, will resign from the board on November 30, 2018. Jacques Aigrain, currently vice chairman, will succeed Gwin as chairman, effective September 24, 2018. Aigrain, a director since 2011, is a senior advisor at Warburg Pincus and a director of the London Stock Exchange and WPP plc. He has extensive executive and board experience, including as chief executive officer of Swiss Re Ltd.