X0306 4 2020-05-14 0 0000315293 Aon plc AON 0001732938 Neller Michael 200 EAST RANDOLPH ST. CHICAGO IL 0 1 0 0 Principal Accounting Officer Class A Ordinary Stock 2020-05-14 4 S 0 750 190.50 D 3459 D On April 1, 2020, Aon plc, an Irish public limited company (the "Company"), became the successor of Aon plc, a public limited company incorporated under the laws of England and Wales ("Aon UK"), pursuant to a scheme of arrangement under English law. Pursuant to the transaction, all outstanding Class A ordinary shares of Aon UK were exchanged, on a one-for-one basis, for Class A ordinary shares of the Company, and Aon UK became a wholly owned subsidiary of the Company. The transaction did not alter the proportionate interests of security holders. /s/ Molly Johnson- Molly Johnson pursuant to a power of attorney from Micahel Neller 2020-05-18