The risk factors set forth in the “Risk Factors” section in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2025 reflect certain risks associated with existing and potential lines of business and contain “forward-looking statements” as discussed in “Information Concerning Forward-Looking Statements” elsewhere in this report. Readers should consider them in addition to the other information contained in this report as our business, financial condition or results of operations could be adversely affected if any of these risks actually occur. Item 2. Unregistered Sales of Equity Securities and Use of Proceeds Issuer Purchases of Equity Securities The following information relates to the purchase of equity securities by Aon or any affiliated purchaser during each month within the second quarter of 2026: Period Total Number of Shares Purchased Average Price Paid per Share (1) Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (2) Maximum Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs (1)(2) 4/1/2026 - 4/30/2026 — $ — — $ 817,278,427 5/1/2026 - 5/31/2026 1,195,837 $ 318.85 1,195,837 $ 435,981,276 6/1/2026 - 6/30/2026 674,674 $ 324.15 674,674 $ 7,717,283,647 1,870,511 $ 320.77 1,870,511 $ 7,717,283,647 (1)Does not include commissions paid to repurchase shares. (2)The Repurchase Program was established in April 2012 with $5.0 billion in authorized repurchases, and was increased by $5.0 billion in authorized repurchases in each of November 2014, June 2017, and November 2020, and by $7.5 billion in each of February 2022, and June 2026, for a total of $35.0 billion in repurchase authorizations. Unregistered Sales of Equity Securities We did not make any unregistered sales of equity in the second quarter of 2026. Item 3. Defaults Upon Senior Securities Not Applicable. Item 4. Mine Safety Disclosures Not Applicable.