Aon to shed units in bid to answer regulators’ issues Aon to shed units in bid to answer regulators’ issues Greg Case cited the merger with Willis Towers Watson as the reason to sell the two businesses. Aon PLC announced on June 3 plans to sell its U.S. retirement consulting business to Aquiline Capital Partners and its Aon Retiree Health Exchange business to Alight Solutions for a total of $1.4 billion. An Aon spokesman confirmed that the deal does not include its outsourced chief investment officer or non-discretionary investment consulting businesses but declined to comment further beyond what was in the news release.