X0202 SCHEDULE 13G/A 0000019617 XXXXXXXX LIVE 1 class A ordinary shares of Aon plc, $0.01 nominal value 09/30/2026 0000315293 Aon plc G0403H108 15 George's Quay Dublin 2 Ireland D02 VR98 XX 00000 Rule 13d-1(b) JPMORGAN CHASE & CO. DE 12672288 242690.0 14272906 30653.0 14312078 6.7 HC Aon plc 15 George's Quay Dublin 2 Ireland D02 VR98 JPMORGAN CHASE & CO. 270 Park Avenue,,New York, NY 10017 DE N HC 14312078 6.7 12672288 242690 14272906 30653 Y N N Not Applicable N J.P. Morgan Trust Company of Delaware; J.P. Morgan Securities LLC; JPMorgan Asset Management (UK) Limited; J.P. MORGAN SE; JPMorgan Chase Bank, National Association; JPMorgan Asset Management Holdings Inc.; J.P. Morgan Investment Management Inc.; J.P. Morgan Mansart Management Limited; JPMorgan Asset Management (Taiwan) Limited; J.P. Morgan Private Investments Inc.; JPMorgan Asset Management (China) Company Limited; J.P. Morgan Wealth Management Solutions Inc.; 55I, LLC N Not Applicable N Not Applicable N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. JPMORGAN CHASE & CO. Rachel Tsvaygoft 10/16/2026