Polen International Growth Fund, in its Q1 2021 investor letter, mentioned Aon plc (NYSE: AON ), and shared their insights on the company. Aon plc is an insurance company that currently has a $57.3 billion market capitalization. Since the beginning of the year, AON delivered a 20.34% return, extending its 12-month gains to 32.64%. As of May 14, 2021, the stock closed at $254.24 per share.