News Category Global Banking & Finance Reviews Aon Confirms the European Commission Has Initiated a Phase II Review of Combination with Willis Towers Watson Aon Confirms the European Commission Has Initiated a Phase II Review of Combination with Willis Towers Watson DUBLIN, Dec. 21, 2020 /PRNewswire/ — Aon plc (NYSE: AON), a leading global professional services firm providing a broad range of risk, retirement and health solutions, confirmed today that the European Commission (EC) has initiated a Phase II review in connection with its combination with Willis Towers Watson Public Limited Company. The Phase II review is a common next step in the review process for a transaction of this size and complexity under EU Merger Regulation and the firm remains on track to close the combination in the first half of 2021.