AON: Other company developments

Item 8.01 Other Events. On September 14, 2026, Aon North America, Inc., a Delaware corporation (“ANA”), Aon Global Holdings plc, a public limited company formed under the laws of England and Wales (“AGH” and, together with ANA, the “Issuers”), Aon plc, an Irish public limited company (“Aon plc”), Aon Corporation, a Delaware corporation (“Aon Corporation”) and Aon Global Limited, a private limited company formed under the laws of England and Wales (“AGL” and, together with Aon plc and Aon Corporation, the “Guarantors” and each, a “Guarantor”), entered into an underwriting agreement (the “Underwriting Agreement”) with Citigroup Global Markets Inc., BofA Securities, Inc., Morgan Stanley & Co. LLC, Wells Fargo Securities, LLC and HSBC Securities (USA) Inc., as representatives of the several underwriters named therein (collectively, the “Underwriters”), with respect to the offering and sale by the Issuers of $2,000,000,000 aggregate principal amount of 5.350% Senior Notes due 2029 (the “2029 Notes”), $3,000,000,000 aggregate principal amount of 5.625% Senior Notes due 2031 (the “2031 Notes”), $2,000,000,000 aggregate principal amount of 5.800% Senior Notes due 2033 (the “2033 Notes”), $2,750,000,000 aggregate principal amount of 5.950% Senior Notes due 2036 (the “2036 Notes”), $1,000,000,000 aggregate principal amount of 6.100% Senior Notes due 2038 (the “2038 Notes) and $750,000,000 aggregate principal amount of 6.450% Senior Notes due 2046 (the “2046 Notes” and, together with the 2029 Notes, the 2031 Notes, the 2033 Notes, the 2036 Notes and the 2038 Notes, the “USI Acquisition Notes”) and $2,000,000,000 aggregate principal amount of 6.450% Senior Notes due 2056 (the “2056 Notes” and, together with the USI Acquisition Notes, the “Notes”), pursuant to the Issuers’ shelf reg