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

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-07-28 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Aon plc (AON) CIK: 0000315293 --- Reporting Owner --- Name: Zeidel Darren CIK: 0001782945 Role: Officer (General Counsel) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Ordinary Stock Date: 2026-07-28 | Code: S (Open market sale) Shares: -700 | Price: $376.00 Total Value: $263,200.00 Shares Owned After: 12,704.099 | Ownership: D (Direct) Footnotes: [F1] The transaction reported was effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 5, 2025. [Transaction #2] Security: Class A Ordinary Stock Date: 2026-07-28 | Code: S (Open market sale) Shares: -725 | Price: $378.00 Total Value: $274,050.00 Shares Owned After: 11,979.099 | Ownership: D (Direct) Footnotes: [F1] The transaction reported was effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 5, 2025. [Transaction #3] Security: Class A Ordinary Stock Date: 2026-07-28 | Code: S (Open market sale) Shares: -475 | Price: $380.00 Total Value: $180,500.00 Shares Owned After: 11,504.099 | Ownership: D (Direct) Footnotes: [F1] The transaction reported was effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 5, 2025. --- Footnotes (Complete Index) --- F1: The transaction reported was effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 5, 2025. --- Signature --- /s/ /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Darren Zeidel (2026-07-30)