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

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-07-17 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: 2026-07-17 | Code: S (Open market sale) Shares: -625 | Price: $370.00 Total Value: $231,250.00 Shares Owned After: 14,729.099 | 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: 2026-07-17 | Code: S (Open market sale) Shares: -650 | Price: $372.00 Total Value: $241,800.00 Shares Owned After: 14,079.099 | 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: 2026-07-17 | Code: S (Open market sale) Shares: -675 | Price: $374.00 Total Value: $252,450.00 Shares Owned After: 13,404.099 | 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 (2026-07-21)