 DUBLIN, Jan. 7, 2022 PRNewswire -- Aon plc NYSE: AON, a leading global professional services firm, plans to announce fourth quarter and full year 2021 results on Friday, February 4 th, 2022 in a news release to be issued at 5:00 am Central Time. Greg Case, CEO, will host a conference call at 7:30 am Central Time on Friday, February 4th, 2022. 