AON: 10-Q financial filing

aon-20260930 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2026 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 1-7933 Aon plc (Exact Name of Registrant as Specified in Its Charter) IRELAND 98-1539969 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification No.) 15 George's Quay , Dublin 2 , Ireland D02 VR98 (Address of principal executive offices) (Zip Code) + 353 1 266 6000 (Registrant’s Telephone Number, including area code) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Class A Ordinary Shares $0.01 nominal value AON New York Stock Exchange Guarantees of Aon Corporation and Aon Global Holdings plc’s 2.850% Senior Notes due 2027 AON27 New York Stock Exchange Guarantees of Aon North America, Inc.’s 5.125% Senior Notes due 2027 AON27B New York Stock Exchange Guarantees of Aon North America, Inc.’s 5.150% Senior Notes due 2029 AON29 New York Stock Exchange Guarantees of Aon North America, Inc. and Aon Global Holdings plc’s 5.350% Senior Notes due 2029 AON29B New York Stock Exchange Guarantees of Aon Corporation and Aon Global Holdings plc’s 2.050% Senior Notes due 2031 AON31 New York Stock Exchange Guarantees of Aon Corporation and Aon Global Holdings plc’s 2.600% Senior Notes due 2031 AON31A New York Stock Exchange Guarantees of Aon North America, Inc.’s 5.300% Senior Notes due 2031 AON31B New York Stock Exchange Guarantees of Aon North America, Inc. and Aon Global Holdings plc’s 5.625% Senior Notes due 2