Aon plc (AON) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-25 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Aon plc (AON) CIK: 0000315293 --- Reporting Owner --- Name: KNIGHT LESTER B CIK: 0001023262 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Ordinary Stock Date: 2026-06-25 | Code: A (Grant or award) Shares: +1,488 Shares Owned After: 5,227 | Ownership: D (Direct) Footnotes: [F1] Class A Ordinary Shares granted annually to each non-employee director of Aon plc. In accordance with Irish law, reporting person agreed to pay the issuer the nominal value of US $0.01 per share issued to the reporting person. [F1] Class A Ordinary Shares granted annually to each non-employee director of Aon plc. In accordance with Irish law, reporting person agreed to pay the issuer the nominal value of US $0.01 per share issued to the reporting person. --- Holdings --- [Holding #1] Security: Class A Ordinary Stock Ownership: I (Indirect) [Holding #2] Security: Class A Ordinary Stock Ownership: I (Indirect) [Holding #3] Security: Class A Ordinary Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: Class A Ordinary Shares granted annually to each non-employee director of Aon plc. In accordance with Irish law, reporting person agreed to pay the issuer the nominal value of US $0.01 per share issued to the reporting person. --- Signature --- /s/ /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Lester Knight (2026-06-29)