Aon plc Director James G. Stavridis Receives Annual Stock Award and Tax Withholding Transaction

This Form 4 filing reports transactions by James G. Stavridis, a non-employee director of Aon plc. On June 25, 2026, Stavridis received 776 Class A Ordinary Shares as part of the annual grant to non-employee directors, with the shares issued at a nominal value of $0.01 per share in accordance with Irish law. On the same date, 186.235 shares were withheld by the issuer for payment of taxes related to the award at a price of $315.95 per share. Following these transactions, Stavridis directly holds 1,377.419 shares. Additionally, the filing discloses indirect holdings through trusts: 1,043 shares held by a trust and 3,808 shares held by a family trust. The filing was signed by Colby Alexis pursuant to a power of attorney from Stavridis.