Aon plc Condensed Consolidated Statements of Income (Unaudited) Three Months Ended June 30, Six Months Ended June 30, (millions, except per share data) 2026 2025 2026 2025 Revenue Total revenue $ 4,246 $ 4,155 $ 9,280 $ 8,884 Expenses Compensation and benefits 2,271 2,360 4,664 4,609 Information technology 162 136 306 272 Premises 85 85 166 167 Depreciation of fixed assets 49 47 95 93 Amortization and impairment of intangible assets 174 201 326 400 Other general expense 494 373 905 819 Accelerating Aon United Program expenses 96 94 188 204 Total operating expenses 3,331 3,296 6,650 6,564 Operating income 915 859 2,630 2,320 Interest income 5 — 17 5 Interest expense (179) (212) (358) (418) Other income (expense) (17) 56 (12) 46 Income before income taxes 724 703 2,277 1,953 Income tax expense 159 109 473 377 Net income 565 594 1,804 1,576 Less: Net income attributable to redeemable and nonredeemable noncontrolling interests 14 15 41 32 Net income attributable to Aon shareholders $ 551 $ 579 $ 1,763 $ 1,544 Basic net income per share attributable to Aon shareholders $ 2.58 $ 2.68 $ 8.25 $ 7.14 Diluted net income per share attributable to Aon shareholders $ 2.58 $ 2.66 $ 8.22 $ 7.10 Weighted average ordinary shares outstanding - basic 213.2 216.2 213.8 216.3 Weighted average ordinary shares outstanding - diluted 213.9 217.3 214.6 217.6 See accompanying Notes to Condensed Consolidated Financial Statements (Unaudited). 7 Aon plc Condensed Consolidated Statements of Comprehensive Income (Unaudited) Three Months Ended June 30, Six Months Ended June 30, (millions) 2026 2025 2026 2025 Net income $ 565 $ 594 $ 1,804 $ 1,576 Less: Net income attributable to redeemable and nonredeemable noncontrolling interests 14 15 41 32 Net income attributable to Aon shareholders 551 579 1,763 1,544 Other comprehensive income (loss), net of tax: Change in fair value of financial instruments (5) 10 (9) 13 Foreign currency translation adjustments (78) 604 (186) 843 Postretirement benefit obligation 25 (1) 52 46 Total other comprehensive income (loss) (58) 613 (143) 902 Total other comprehensive income (loss) attributable to Aon shareholders (58) 613 (143) 902 Comprehensive income attributable to Aon shareholders $ 493 $ 1,192 $ 1,620 $ 2,446 See accompanying Notes to Condensed Consolidated Financial Statements (Unaudited). 8 Aon plc Condensed Consolidated Statements of Financial Position (Unaudited) (millions, except nominal value) June 30, 2026 December 31, 2025 Assets Current assets Cash and cash equivalents $ 1,062 $ 1,195 Short-term investments 205 1,603 Receivables, net 5,348 4,209 Fiduciary assets 20,698 17,889 Other current assets 801 878 Total current assets 28,114 25,774 Goodwill 15,884 15,797 Intangible assets, net 5,657 5,727 Fixed assets, net 761 702 Operating lease right-of-use assets 750 677 Deferred tax assets 770 748 Prepaid pension 596 603 Other non-current assets 815 756 Total assets $ 53,347 $ 50,784 Liabilities, redeemable noncontrolling interests, and equity Liabilities Current liabilities Accounts payable and accrued liabilities $ 2,266 $ 2,861 Short-term debt and current portion of long-term debt 2,020 589 Fiduciary liabilities 20,698 17,889 Other current liabilities 2,242 1,887 Total current liabilities 27,226 23,226 Long-term debt 12,947 14,660 Non-current operating lease liabilities 730 641 Deferred tax liabilities 342 340 Pension, other postretirement, and postemployment liabilities 1,002 1,084 Other non-current liabilities 1,390 1,285 Total liabilities 43,637 41,236 Redeemable noncontrolling interests 24 89 Equity Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: at June 30, 2026 - 212.0; at December 31, 2025 - 214.5) 2 2 Additional paid-in capital 13,500 13,438 Retained earnings (Accumulated deficit) 82 (245) Accumulated other comprehensive loss (3,986) (3,843) Total Aon shareholders' equity 9,598 9,352 Nonredeemable noncontrolling interests 88 107 Total equity 9,686 9,459 Total liabilities, redeemable noncontrolling interests and equity $ 53,347 $ 50,784 See accompanying Notes to Condensed Consolidated Financial Statements (Unaudited). 9 Aon plc Condensed Consolidated Statements of Shareholders’ Equity (Unaudited) (millions) Shares Ordinary Shares and Additional Paid-in Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Loss, Net of Tax Non- redeemable Non- controlling Interests Total Balance at January 1, 2026 214.5 $ 13,440 $ (245) $ (3,843) $ 107 $ 9,459 Net income (1) — — 1,212 — 28 1,240 Shares issued - employee stock compensation plans 0.6 (68) — — — (68) Shares repurchased (1.5) — (500) — — (500) Share-based compensation expense — 82 — — — 82 Dividends to shareholders ($0.745 per share) — — (160) — — (160) Net change in fair value of financial instruments — — — (4) — (4) Net foreign currency translation adjustments — — — (108) — (108) Net postretirement benefit obligation — — — 27 — 27 Net purchases of subsidiary shares from nonredeemable noncontrolling interests — (2) — — (1) (3) Dividends paid to nonredeemable noncontrolling interests on subsidiary common stock — — — — (10) (10) Remeasurement of redemption value of redeemable noncontrolling interest — 3 — — — 3 Balance at March 31, 2026 213.6 $ 13,455 $ 307 $ (3,928) $ 124 $ 9,958 Net income (2) — — 551 — 14 565 Shares issued - employee stock compensation plans 0.3 (46) — — — (46) Shares repurchased (1.9) — (600) — — (600) Share-based compensation expense — 122 — — — 122 Dividends to shareholders ($0.820 per share) — — (176) — — (176) Net change in fair value of financial instruments — — — (5) — (5) Net foreign currency translation adjustments — — — (78) — (78) Net postretirement benefit obligation — — — 25 — 25 Purchases of subsidiary shares from nonredeemable noncontrolling interests — (27) — — (9) (36) Dividends paid to nonredeemable noncontrolling interests on subsidiary common stock — — — — (41) (41) Remeasurement of redemption value of redeemable noncontrolling interest — (2) — — — (2) Balance at June 30, 2026 212.0 $ 13,502 $ 82 $ (3,986) $ 88 $ 9,686 (1)The Company’s Net income totaled $1.2 billion for the quarter ended March 31, 2026, which included $1 million of Net loss related to redeemable noncontrolling interests. (2)The Company’s Net income totaled $565 million for the quarter ended June 30, 2026, which included an insignificant Net loss related to redeemable noncontrolling interests. 10 (millions) Shares Ordinary Shares and Additional Paid-in Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Loss, Net of Tax Non-redeemable Non- controlling Interests Total Balance at January 1, 2025 216.0 $ 13,175 $ (2,309) $ (4,745) $ 184 $ 6,305 Net income (1) — — 965 — 21 986 Shares issued - employee stock compensation plans 0.7 (111) — — — (111) Shares repurchased (0.6) — (250) — — (250) Share-based compensation expense — 147 — — — 147 Dividends to shareholders ($0.675 per share) — — (146) — — (146) Net change in fair value of financial instruments — — — 3 — 3 Net foreign currency translation adjustments — — — 239 — 239 Net postretirement benefit obligation — — — 47 — 47 Dividends paid to nonredeemable noncontrolling interests on subsidiary common stock — — — — (14) (14) Remeasurement of redemption value of redeemable noncontrolling interest $ — $ (11) $ — $ — $ — (11) Balance at March 31, 2025 216.1 $ 13,200 $ (1,740) $ (4,456) $ 191 $ 7,195 Net income (2) — — 579 — 14 593 Shares issued - employee stock compensation plans 0.3 (49) (1) — — (50) Shares repurchased (0.7) — (250) — — (250) Share-based compensation expense — 119 — — — 119 Dividends to shareholders ($0.745 per share) — — (162) — — (162) Net change in fair value of financial instruments — — — 10 — 10 Net foreign currency translation adjustments — — — 604 — 604 Net postretirement benefit obligation — — — (1) — (1) Purchases of subsidiary shares from nonredeemable noncontrolling interests — (9) — — — (9) Dividends paid to nonredeemable noncontrolling interests on subsidiary common stock — — — — (40) (40) Remeasurement of redemption value of redeemable noncontrolling interest — (1) — — — (1) Balance at June 30, 2025 215.7 $ 13,260 $ (1,574) $ (3,843) $ 165 $ 8,008 (1)The Company’s Net income totaled $982 million for the quarter ended March 31, 2025, which included $4 million of Net loss related to redeemable noncontrolling interests. (2)The Company’s Net income totaled $594 million for the quarter ended June 30, 2025, which included $1 million of Net gain related to redeemable noncontrolling interests. See accompanying Notes to Condensed Consolidated Financial Statements (Unaudited). 11 Aon plc Condensed Consolidated Statements of Cash Flows (Unaudited) Six Months Ended June 30, (millions) 2026 2025 Cash flows from operating activities Net income $ 1,804 $ 1,576 Adjustments to reconcile net income to cash provided by operating activities: Gain from sales of businesses (20) — Depreciation of fixed assets 95 93 Amortization and impairment of intangible assets 326 400 Share-based compensation expense 204 266 Deferred income taxes (90) (242) Other, net 1 (111) Change in assets and liabilities: Receivables, net (1,180) (902) Accounts payable and accrued liabilities (605) (738) Accelerating Aon United Program liabilities 24 15 Current income taxes (69) (73) Pension, other postretirement and postemployment liabilities (23) (12) Other assets and liabilities 519 664 Cash provided by operating activities 986 936 Cash flows from investing activities Proceeds from investments 33 71 Purchases of investments (36) (42) Net sales (purchases) of short-term investments - non fiduciary 1,394 (153) Acquisition of businesses, net of cash and funds held on behalf of clients (322) (143) Sale of businesses, net of cash and funds held on behalf of clients 21 119 Capital expenditures (140) (120) Cash provided by (used for) investing activities 950 (268) Cash flows from financing activities Share repurchase (1,100) (500) Proceeds from issuance of shares 28 33 Cash paid for employee taxes on withholding shares (141) (194) Commercial paper issuances, net of repayments 297 480 Repayment of debt (593) (300) Increase in fiduciary liabilities, net of fiduciary receivables 710 569 Cash dividends to shareholders (337) (308) Redeemable and nonredeemable noncontrolling interests, and other financing activities (163) (153) Cash used for financing activities (1,299) (373) Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients (147) 696 Net increase in cash and cash equivalents and funds held on behalf of clients 490 991 Cash, cash equivalents and funds held on behalf of clients at beginning of period 8,573 8,333 Cash, cash equivalents and funds held on behalf of clients at end of period $ 9,063 $ 9,324 Reconciliation of cash and cash equivalents and funds held on behalf of clients: Cash and cash equivalents $ 1,062 $ 1,008 Cash and cash equivalents and funds held on behalf of clients classified as held for sale — 1 Funds held on behalf of clients 8,001 8,315 Total cash and cash equivalents and funds held on behalf of clients $ 9,063 $ 9,324 Supplemental disclosures: Interest paid $ 363 $ 416 Income taxes paid, net of refunds $ 632 $ 692 See accompanying Notes to Condensed Consolidated Financial Statements (Unaudited). 12 Notes to Condensed Consolidated Financial Statements (Unaudited) 1. Basis of Presentation The accompanying Condensed Consolidated Financial Statements and Notes thereto have been prepared in accordance with U.S. GAAP. The Condensed Consolidated Financial Statements include the accounts of Aon plc and all of its controlled subsidiaries (“Aon” or the “Company”). Intercompany accounts and transactions have been eliminated. The Condensed Consolidated Financial Statements include, in the opinion of management, all adjustments (consisting of normal recurring adjustments and reclassifications) necessary to present fairly the Company’s consolidated financial position, results of operations, and cash flows for all periods presented. Certain information and disclosures normally included in the Consolidated Financial Statements prepared in accordance with U.S. GAAP have been condensed or omitted. The Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025. The results for the three and six months ended June 30, 2026 are not necessarily indicative of operating results that may be expected for the full year ending December 31, 2026. Use of Estimates The preparation of the accompanying Condensed Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the date of the Condensed Consolidated Financial Statements, and the reported amounts of reserves and expenses. These estimates and assumptions are based on management’s best estimates and judgments. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. Management believes its estimates to be reasonable given the current facts available. Aon adjusts such estimates and assumptions when facts and circumstances dictate. Illiquid credit markets, volatile equity markets, and foreign currency exchange rate movements increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment would, if applicable, be reflected in the Condensed Consolidated Financial Statements in future periods. 2. Accounting Principles and Practices New Accounting Pronouncements Accounting Standards Issued But Not Yet Adopted Accounting for and Disclosure of Environmental Credits and Environmental Credit Obligations In May 2026, the FASB issued new accounting guidance under ASC 818, Environmental Credits and Environmental Credit Obligations, which provides guidance on the recognition, measurement, presentation, and disclosure of environmental credits and environmental credit obligations. The guidance is applicable to environmental credits acquired, generated, or received by an entity and requires expanded disclosures related to the nature, intended use, and financial statement impacts. The new guidance is effective for annual and interim reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the timing of adoption and the impact the guidance will have on the Consolidated Financial Statements and Notes. Accounting for and Disclosure of Software Costs In September 2025, the FASB issued new accounting guidance under ASC 350-40, Intangibles — Goodwill and Other Internal Use Software to modernize the criteria for capitalizing software development costs by removing references to development stages and framework updates to better reflect current software development practices. The new guidance is effective for annual periods beginning after December 15, 2027, with early adoption permitted. The Company is evaluating the impact the new guidance will have on the Consolidated Financial Statements and Notes. 13 Disaggregation of Income Statement Expenses In November 2024, the FASB issued new accounting guidance under ASC 220, Income Statement — Reporting Comprehensive Income, which requires more detailed information about certain expenses in commonly presented expense captions including inventory, employee compensation, depreciation, and amortization. The new guidance also requires disclosure of total selling expenses and, on an annual basis, an entity’s definition of selling expenses. The new guidance is effective for Aon for the year ended December 31, 2027, with early adoption permitted. Entities may apply the new guidance on a prospective basis, with the option for retrospective application. The Company is currently evaluating the transition approach and the impact the guidance will have on the Notes to Consolidated Financial Statements. Securities and Exchange Commission Final Rules The Enhancement and Standardization of Climate-Related Disclosures for Investors In March 2024, the SEC adopted final rules to enhance and standardize climate-related disclosures. The final rules would require the Company to provide certain climate-related information in Item 7, Management’s Discussion and Analysis and the Notes to Consolidated Financial Statements, including regarding material climate-related risks, activities to mitigate or adapt to such risks, information regarding oversight and management of climate-related risks, information on climate-related targets or goals, and disclosure of Scope 1 and 2 GHG emissions. The final rules have been subject to several legal challenges, and the SEC stayed the effectiveness of the final rules in April 2024 pending judicial review. On March 27, 2025, the SEC voted to end its legal defense of the final rules in Court of Appeals for the Eighth Circuit. On September 12, 2025, the Eighth Circuit issued an order holding the consolidated petitions for review in abeyance until the SEC informed the court whether it would reconsider the rules under administrative procedures or whether the SEC would renew its defense of the rules. On May 29, 2026, the SEC proposed to rescind the climate-related disclosure rules in their entirety due to the lack of statutory authority of the SEC. The proposal remains subject to public comment. The Company will continue to monitor developments related to the proposed rescission and any impacts on its disclosure requirements. 3. Revenue from Contracts with Customers Disaggregation of Revenue The following table summarizes revenue from contracts with customers by principal service line (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Commercial Risk Solutions $ 2,295 $ 2,178 $ 4,518 $ 4,180 Reinsurance Solutions 711 688 1,990 1,877 Total Risk Capital (1) 3,006 2,866 6,508 6,057 Health Solutions 818 772 1,937 1,798 Wealth Solutions 426 519 846 1,038 Total Human Capital (1) 1,244 1,291 2,783 2,836 Eliminations (4) (2) (11) (9) Total revenue $ 4,246 $ 4,155 $ 9,280 $ 8,884 (1)Includes inter-segment revenue. Refer to Note 16 “Segment Information” for further information. Consolidated revenue from contracts with customers by geographic area, which is attributed on the basis of where the services are performed, is as follows (in millions): Three Months Ended June 30, 2026 Risk Capital Human Capital Corporate/Eliminations Total U.S. $ 1,392 $ 632 $ (4) $ 2,020 Americas other than U.S. 299 109 — 408 U.K. 422 210 — 632 Ireland 22 25 — 47 Europe, Middle East, & Africa other than U.K. and Ireland 533 185 — 718 Asia Pacific 338 83 — 421 Total revenue $ 3,006 $ 1,244 $ (4) $ 4,246 14 Three Months Ended June 30, 2025 Risk Capital Human Capital Corporate/Eliminations Total U.S. $ 1,324 $ 718 $ (2) $ 2,040 Americas other than U.S. 285 110 — 395 U.K. 411 199 — 610 Ireland 24 22 — 46 Europe, Middle East, & Africa other than U.K. and Ireland 469 165 — 634 Asia Pacific 353 77 — 430 Total revenue $ 2,866 $ 1,291 $ (2) $ 4,155 Six Months Ended June 30, 2026 Risk Capital Human Capital Corporate/Eliminations Total U.S. $ 2,718 $ 1,323 $ (11) $ 4,030 Americas other than U.S. 560 232 — 792 U.K. 904 417 — 1,321 Ireland 47 53 — 100 Europe, Middle East, & Africa other than U.K. and Ireland 1,652 555 — 2,207 Asia Pacific 627 203 — 830 Total revenue $ 6,508 $ 2,783 $ (11) $ 9,280 Six Months Ended June 30, 2025 Risk Capital Human Capital Corporate/Eliminations Total U.S. $ 2,545 $ 1,506 $ (9) $ 4,042 Americas other than U.S. 539 230 — 769 U.K. 841 390 — 1,231 Ireland 46 45 — 91 Europe, Middle East, & Africa other than U.K. and Ireland 1,415 481 — 1,896 Asia Pacific 671 184 — 855 Total revenue $ 6,057 $ 2,836 $ (9) $ 8,884 Contract Costs An analysis of the changes in the net carrying amount of costs to fulfill contracts with customers are as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Balance at beginning of period $ 325 $ 302 $ 450 $ 424 Additions 473 409 930 827 Amortization (487) (448) (1,068) (992) Impairment — — — — Foreign currency translation and other (2) 10 (3) 14 Balance at end of period $ 309 $ 273 $ 309 $ 273 15 An analysis of the changes in the net carrying amount of costs to obtain contracts with customers are as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Balance at beginning of period $ 209 $ 208 $ 208 $ 207 Additions 21 14 36 27 Amortization (14) (40) (27) (53) Impairment — — — — Foreign currency translation and other 1 5 — 6 Balance at end of period $ 217 $ 187 $ 217 $ 187 4. Accelerating Aon United Program In the third quarter of 2023, Aon initiated a three-year restructuring program called the Accelerating Aon United Program (the “Program” or the “AAU Program”) with the purpose of streamlining the Company’s technology infrastructure, optimizing its leadership structure and resource alignment, and reducing its real estate footprint to align to its hybrid working strategy. The Program includes technology-related costs to facilitate streamlining and simplifying operations, headcount reduction costs, and costs associated with asset impairments, including real estate consolidation and technology costs. The Program is an investment in the Company’s 3x3 Plan that brings together the best of the firm through its Aon United strategy, delivered as Risk Capital and Human Capital, and Aon’s Client Leadership model, powered by Aon Business Services. Program charges are recognized within Accelerating Aon United Program expenses on the accompanying Condensed Consolidated Statements of Income and consist of the following cost activities: •Technology and other – includes costs associated with actions taken to rationalize applications and to optimize technology across the Company. These costs may include termination fees and other non-capitalizable costs associated with Program initiatives, which include professional service fees. •Workforce optimization – includes costs associated with headcount reduction and other separation-related costs. •Asset impairments – includes non-cash costs associated with impairment of assets, as they are identified, including ROU lease assets, leasehold improvements, and other capitalized assets no longer providing economic benefit. The Program is currently expected to result in cumulative costs of $1.3 billion, consisting of approximately $1.2 billion of cash charges and approximately $0.1 billion of non-cash charges. For the three and six months ended June 30, 2026, total Program costs incurred were $96 million and $188 million, respectively. Over the life of the Program, the Risk Capital segment is expected to incur approximately $290 million of charges, while the Human Capital segment is expected to incur approximately $70 million of charges, with the remaining charges relating to corporate expenses. Total Program costs incurred for the three and six months ended June 30, 2026 and 2025 are as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Risk Capital $ 14 $ 32 $ 33 $ 51 Human Capital (1) (1) 6 4 10 Corporate 83 56 151 143 Total $ 96 $ 94 $ 188 $ 204 (1)Human Capital Program costs reflect changes in accruals made in the current period related to workforce optimization. In the final quarters of the Program, there may be changes to expected timing, estimates of expected costs, and related savings. 16 The changes in the Company’s liabilities for the Program as of June 30, 2026 are as follows (in millions): Technology and other Workforce optimization Asset impairments Total Liability balance as of December 31, 2025 $ 39 $ 108 $ — $ 147 Charges 124 61 3 188 Cash payments (105) (59) — (164) Foreign currency translation and other — (2) — (2) Non-cash charges (1) (2) 5 (3) — Liability balance as of June 30, 2026 $ 56 $ 113 $ — $ 169 Total costs incurred from inception to date $ 459 $ 516 $ 102 $ 1,077 (1)Charges reflect changes in accruals made in the current year. The Company’s unpaid liabilities for charges under the Program are primarily included in Accounts payable and accrued liabilities and Other non-current liabilities in the Condensed Consolidated Statements of Financial Position. 5. Cash and Cash Equivalents and Short-Term Investments Cash and cash equivalents include cash balances and all highly liquid instruments with initial maturities of three months or less. Short-term investments consist of money market funds. The estimated fair value of Cash and cash equivalents and Short-term investments approximates their carrying values. At June 30, 2026 and December 31, 2025, Cash and cash equivalents and Short-term investments were $1.3 billion and $2.8 billion, respectively. The balance as of December 31, 2025 reflected the investment of proceeds from the sale of the NFP Wealth business. Of the total balances, $170 million and $180 million were restricted as to their use at June 30, 2026 and December 31, 2025, respectively. Included within Short-term investments as of June 30, 2026 and December 31, 2025, were £75 million ($98 million at June 30, 2026 exchange rates) and £72 million ($97 million at December 31, 2025 exchange rates), respectively, of operating funds required to be held by the Company in the U.K. by the FCA, a U.K.-based regulator. 6. Other Financial Data Condensed Consolidated Statements of Income Information Other Income (Expense) Other income (expense) consists of the following (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Gain from sales of businesses (1) — — 20 — Equity earnings (loss) (2) 3 (2) 1 Pension and other postretirement (15) (21) (30) (44) Foreign currency remeasurement 3 (38) 12 (54) Financial instruments and other (2) (3) 112 (12) 143 Total $ (17) $ 56 $ (12) $ 46 (1)During the six months ended June 30, 2026, an additional $20 million gain was recognized associated with revisions to the final closing statement related to the disposal of the NFP Wealth business completed in the fourth quarter of 2025. The entirety of the gain was recognized in the first quarter of 2026. Refer to Note 7 “Acquisitions and Dispositions of Businesses” for further information surrounding this disposal. (2)During the three and six months ended June 30, 2025, an $88 million and $108 million gain was recognized, respectively, related to deferred consideration from the affiliates of The Blackstone Group L.P. and the other designated purchasers related to a divestiture completed in a prior-year period. 17 Condensed Consolidated Statements of Financial Position Information Allowance for Doubtful Accounts Changes in the net carrying amount of allowance for doubtful accounts are as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Balance at beginning of period $ 83 $ 74 $ 74 $ 75 Provision 6 3 13 6 Accounts written off, net of recoveries (2) (1) (4) (6) Foreign currency translation and other (5) 3 (1) 4 Balance at end of period $ 82 $ 79 $ 82 $ 79 Other Current Assets The components of Other current assets are as follows (in millions): As of June 30, 2026 December 31, 2025 Costs to fulfill contracts with customers (1) $ 309 $ 450 Prepaid expenses 175 136 Taxes receivable 131 102 Other 186 190 Total $ 801 $ 878 (1)Refer to Note 3 “Revenue from Contracts with Customers” for further information. Other Non-Current Assets The components of Other non-current assets are as follows (in millions): As of June 30, 2026 December 31, 2025 Costs to obtain contracts with customers (1) $ 217 $ 208 Investments 191 192 Taxes receivable 105 82 Other 302 274 Total $ 815 $ 756 (1)Refer to Note 3 “Revenue from Contracts with Customers” for further information. Other Current Liabilities The components of Other current liabilities are as follows (in millions): As of June 30, 2026 December 31, 2025 Deferred revenue (1) $ 353 $ 259 Leases 177 181 Taxes payable 239 309 Contingent consideration 26 28 Other 1,447 1,110 Total $ 2,242 $ 1,887 (1)During the three and six months ended June 30, 2026, revenue of $174 million and $387 million, respectively, was recognized in the Condensed Consolidated Statements of Income that was previously deferred. During the three and six months ended June 30, 2025, revenue of $236 million and $466 million, respectively, was recognized in the Condensed Consolidated Statements of Income that was previously deferred. 18 Other Non-Current Liabilities The components of Other non-current liabilities are as follows (in millions): As of June 30, 2026 December 31, 2025 Taxes payable $ 1,066 $ 1,014 Contingent consideration 146 99 Compensation and benefits 52 60 Deferred revenue 27 30 Other 99 82 Total $ 1,390 $ 1,285 7. Acquisitions and Dispositions of Businesses Completed Acquisitions Total acquisitions completed by the Company for the three and six months ended June 30, 2026 and 2025 were as follows. Acquisitions that impact multiple segments are categorized by the segment primarily impacted. Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Risk Capital 1 1 6 7 Human Capital 2 1 2 2 Total 3 2 8 9 The following table includes the preliminary fair values of consideration transferred, assets acquired, and liabilities assumed as a result of the Company’s acquisitions completed in 2026 (in millions): Six Months Ended June 30, 2026 Consideration transferred: Cash $ 376 Deferred and contingent consideration 55 Aggregate consideration transferred $ 431 Assets acquired: Goodwill 212 Intangible assets 278 Other assets (1) 83 Total assets acquired 573 Liabilities assumed: Total liabilities assumed 142 Net assets acquired $ 431 (1)Includes Cash and cash equivalents of $30 million and $24 million, respectively, in funds held on behalf of clients. The results of operations of these acquisitions are included in the Condensed Consolidated Financial Statements as of the respective acquisition dates. The Company’s results of operations would not have been materially different if these acquisitions had been reported from the beginning of the period in which they were acquired. 2026 Significant Acquisitions On March 16, 2026, the Company completed the acquisition of 100% of the share capital of ShoreOne Insurance Managers, Inc., a coastal-focused homeowners and flood insurance broker based in the U.S in the Risk Capital segment. 19 2025 Significant Acquisitions On January 1, 2025, the Company completed the acquisition of 100% of the partnership interests and share capital of Griffiths & Armour, an insurance broker in the U.K. in the Risk Capital segment. Completed Dispositions There were no dispositions completed by the Company for the three and six months ended June 30, 2026. The Company completed one disposition within Human Capital in the three and six months ended June 30, 2025. Dispositions that impact multiple segments are categorized by the segment primarily impacted. For the three months ended June 30, 2026, there were no gains recognized related to dispositions. For the six months ended June 30, 2026, the pretax gains recognized related to dispositions were $20 million, which related to the disposition of the NFP Wealth business, as defined below, completed in the prior year. There were insignificant pretax gains recognized related to dispositions for the three and six months ended June 30, 2025. Gains recognized as a result of a disposition are included in Other income (expense) in the Condensed Consolidated Statements of Income. 2025 Significant Dispositions On October 30, 2025, Aon completed the sale of a significant majority of NFP’s Wealth businesses within our Human Capital segment (the “NFP Wealth business”). Total proceeds received on closing was $2.3 billion, and a pre-tax gain of $1.2 billion was recognized within Other income (expense) on the Consolidated Statement of Income for the year ended December 31, 2025. The major classes of assets sold included Intangible assets, net of $760 million and Goodwill of $398 million. During the six months ended June 30, 2026, Aon recognized a $20 million gain related to the prior-year sale of the NFP Wealth business, all of which was recognized in the first quarter of 2026. 8. Goodwill and Other Intangible Assets The changes in the net carrying amount of goodwill for the six months ended June 30, 2026 are as follows (in millions): Risk Capital Human Capital Total Balance as of December 31, 2025 $ 9,551 $ 6,246 $ 15,797 Goodwill related to current year acquisitions 201 11 212 Foreign currency translation and other (92) (33) (125) Balance as of June 30, 2026 $ 9,660 $ 6,224 $ 15,884 Other intangible assets by asset class are as follows (in millions): June 30, 2026 December 31, 2025 Gross Carrying Amount Accumulated Amortization and Impairment Net Carrying Amount Gross Carrying Amount Accumulated Amortization and Impairment Net Carrying Amount Customer-related and contract-based $ 7,968 $ 2,901 $ 5,067 $ 7,738 $ 2,644 $ 5,094 Tradenames 718 157 561 716 121 595 Technology and other 365 336 29 369 331 38 Total $ 9,051 $ 3,394 $ 5,657 $ 8,823 $ 3,096 $ 5,727 The estimated future amortization for finite-lived intangible assets as of June 30, 2026 is as follows (in millions): Remainder of 2026 $ 347 2027 652 2028 598 2029 550 2030 501 2031 452 Thereafter 2,557 Total $ 5,657 20 9. Debt Notes In May 2026, Aon Corporation and Aon Global Holdings plc’s $600 million 2.850% Senior Notes due May 2027 were classified as Short-term debt and current portion of long-term debt in the Consolidated Statement of Financial Position as the date of maturity is less than one year. The Company expects to use cash flow from operations and available cash on hand to repay these Senior Notes. In March 2026, Aon North America, Inc.’s $600 million 5.125% Senior Notes due March 2027 were classified as Short-term debt and current portion of long-term debt in the Consolidated Statement of Financial Position as the date of maturity is less than one year. The Company expects to use cash flow from operations and available cash on hand to repay these Senior Notes. In January 2026, Aon Corporation’s $521 million 8.205% Junior Subordinated Notes due January 2027 were classified as Short-term debt and current portion of long-term debt in the Consolidated Statement of Financial Position as the date of maturity is in less than one year. The Company expects to use cash flow from operations and available cash on hand to repay these Junior Subordinated Notes. On January 15, 2026, Aon Global Limited issued a notice of redemption to holders of its 2.875% Senior Notes for the redemption of all €500 million ($593 million at February 14, 2026 exchange rates) outstanding aggregate principal amount of the notes, plus accrued and unpaid interest, originally set to mature in May 2026. On February 14, 2026, these notes were repaid in full. In December 2025, Aon Global Limited’s $750 million 3.875% Senior Notes matured and were repaid in full. On April 25, 2024, Aon North America, Inc. drew its $2 billion delayed draw term loan. As of December 31, 2025, the term loan was paid in full. Revolving Credit Facilities As of June 30, 2026, Aon plc had two primary committed credit facilities outstanding: its $1.0 billion multi-currency U.S. credit facility expiring in September 2027 and its $1.0 billion multi-currency U.S. credit facility expiring in October 2028. In aggregate, these two facilities provide $2.0 billion in available credit. Each of these primary committed credit facilities includes customary representations, warranties, and covenants, including financial covenants that require Aon to maintain specified ratios of adjusted consolidated EBITDA to consolidated interest expense and consolidated debt to adjusted consolidated EBITDA, in each case, tested quarterly. Aon did not have borrowings under either of these primary committed credit facilities as of June 30, 2026 or December 31, 2025. Additionally, Aon was in compliance with the financial covenants and all other covenants contained therein during the rolling 12 months ended June 30, 2026 and December 31, 2025. Commercial Paper Aon Corporation has established a U.S. commercial paper program (the “U.S. Program”) and Aon Global Holdings plc has established a European multi-currency commercial paper program (the “European Program” and, together with the U.S. Program, the “Commercial Paper Programs”). Commercial paper may be issued in aggregate principal amounts of up to approximately $1.3 billion under the U.S. Program and €625 million ($711 million at June 30, 2026 exchange rates and $736 million at December 31, 2025 exchange rates) under the European Program, not to exceed the amount of the Company’s committed credit facilities, which was $2.0 billion at June 30, 2026. The aggregate capacity of the Commercial Paper Program remains fully backed by the Company’s committed credit facilities. The U.S. Program was fully and unconditionally guaranteed by Aon plc, Aon Global Limited, Aon North America, Inc., and Aon Global Holdings plc and the European Program was fully and unconditionally guaranteed by Aon plc, Aon Global Limited, Aon North America, Inc., and Aon Corporation. Commercial paper outstanding, which is included in Short-term debt and current portion of long-term debt in the Company’s Condensed Consolidated Statements of Financial Position, is as follows (in millions): June 30, 2026 December 31, 2025 Commercial paper outstanding $ 299 $ — 21 The weighted average commercial paper outstanding and its related interest rates are as follows (in millions, except percentages): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Weighted average commercial paper outstanding $ 347 $ 856 $ 196 $ 528 Weighted average interest rate of commercial paper outstanding 3.84 % 4.24 % 3.86 % 4.30 % 10. Income Taxes The effective tax rate on Net income was 22.0% and 20.8% for the three and six months ended June 30, 2026, respectively. The effective tax rate on Net income was 15.5% and 19.3% for the three and six months ended June 30, 2025, respectively. For the three months ended June 30, 2026, the quarter-to-date tax rate was primarily driven by the geographical distribution of income and an unfavorable impact from discrete items. For the six months ended June 30, 2026, the year-to-date tax rate was primarily driven by the geographical distribution of income and certain discrete items, including the favorable impact of a capital loss offset by the unfavorable impact of other discrete items. For the three and six months ended June 30, 2025, the quarter-to-date and year-to-date tax rates were primarily driven by the geographical distribution of income and certain discrete items, including the tax benefit associated with the sale of certain assets and liabilities and share-based payments partially offset by the unfavorable impact of other discrete items. 11. Shareholders’ Equity Ordinary Shares Aon has a share repurchase program authorized by the Company’s Board of Directors (“the Repurchase Program”). 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. In each of February 2022 and June 2026, authorized repurchases were increased by an additional $7.5 billion, for a total of $35.0 billion in repurchase authorizations. Under the Repurchase Program, the Company’s class A ordinary shares may be repurchased through the open market or in privately negotiated transactions, from time to time, based on prevailing market conditions, and will be funded from available capital. The following table summarizes the Company’s share repurchase activity (in millions, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Shares repurchased 1.9 0.7 3.4 1.3 Average price per share $ 320.77 $ 361.25 $ 321.61 $ 376.76 Repurchase costs recorded to Retained Earnings $ 600 $ 250 $ 1,100 $ 500 At June 30, 2026, the remaining authorized amount for share repurchases under the Repurchase Program was approximately $7.7 billion. Under the Repurchase Program, the Company has repurchased a total of 178.3 million shares for an aggregate cost of approximately $27.3 billion. Weighted Average Ordinary Shares Weighted average ordinary shares outstanding are as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Basic weighted average ordinary shares outstanding 213.2 216.2 213.8 216.3 Dilutive effect of potentially issuable shares 0.7 1.1 0.8 1.3 Diluted weighted average ordinary shares outstanding 213.9 217.3 214.6 217.6 22 Potentially issuable shares are not included in the computation of Diluted net income per share attributable to Aon shareholders if their inclusion would be antidilutive. There were 0.5 million and 0.5 million shares excluded from the calculation for the three and six months ended June 30, 2026, respectively. There were 0.4 million and 0.1 million shares excluded from the calculation for the three and six months ended June 30, 2025, respectively. Accumulated Other Comprehensive Loss Changes in Accumulated other comprehensive loss by component, net of related tax, are as follows (in millions): Change in Fair Value of Financial Instruments (1) Foreign Currency Translation Adjustments Postretirement Benefit Obligation (2) Total Balance at January 1, 2026 $ 78 $ (1,225) $ (2,696) $ (3,843) Other comprehensive income (loss) before reclassifications, net (6) (188) (3) (197) Amounts reclassified from accumulated other comprehensive income Amounts reclassified from accumulated other comprehensive income (loss) (4) 2 74 72 Tax expense 1 — (19) (18) Amounts reclassified from accumulated other comprehensive income (loss), net (3) 2 55 54 Net current period other comprehensive income (loss) (9) (186) 52 (143) Balance at June 30, 2026 $ 69 $ (1,411) $ (2,644) $ (3,986) Change in Fair Value of Financial Instruments (1) Foreign Currency Translation Adjustments Postretirement Benefit Obligation (2) Total Balance at January 1, 2025 $ 74 $ (2,051) $ (2,768) $ (4,745) Other comprehensive income (loss) before reclassifications, net 17 843 (7) 853 Amounts reclassified from accumulated other comprehensive income Amounts reclassified from accumulated other comprehensive income (6) — 72 66 Tax expense 2 — (19) (17) Amounts reclassified from accumulated other comprehensive income, net (4) — 53 49 Net current period other comprehensive income (loss) 13 843 46 902 Balance at June 30, 2025 $ 87 $ (1,208) $ (2,722) $ (3,843) (1)Reclassifications from this category included in Accumulated other comprehensive loss are recorded in Total revenue, Interest expense, and Compensation and benefits in the Condensed Consolidated Statements of Income. Refer to Note 13 “Derivatives and Hedging” for further information regarding the Company’s derivative and hedging activity. (2)Reclassifications from this category included in Accumulated other comprehensive loss are recorded in Other income (expense) in the Condensed Consolidated Statements of Income. Subsequent Event On July 10, 2026, Aon announced a $0.820 per share dividend payable August 14, 2026. 23 12. Employee Benefits The following table provides the components of the net periodic cost recognized in the Condensed Consolidated Statements of Income for Aon’s significant U.K., U.S., and other major pension plans, which are located in the Netherlands and Canada. Service cost is reported in Compensation and benefits and all other components are reported in Other income (expense) as follows (in millions): Three Months Ended June 30, U.K. U.S. Other 2026 2025 2026 2025 2026 2025 Service cost $ — $ — $ — $ — $ — $ — Interest cost 36 39 23 25 12 10 Expected return on plan assets, net of administration expenses (48) (45) (29) (30) (15) (14) Amortization of prior-service cost 2 — — — — — Amortization of net actuarial loss 20 22 11 9 3 4 Net periodic cost $ 10 $ 16 $ 5 $ 4 $ — $ — Six Months Ended June 30, U.K. U.S. Other 2026 2025 2026 2025 2026 2025 Service cost $ — $ — $ — $ — $ — $ — Interest cost 73 76 47 51 23 19 Expected return on plan assets, net of administration expenses (96) (88) (59) (60) (30) (26) Amortization of prior-service cost 2 1 — — — — Amortization of net actuarial loss 40 44 22 18 7 7 Net periodic cost $ 19 $ 33 $ 10 $ 9 $ — $ — Contributions Assuming no additional contributions are agreed to with, or required by, the pension plan trustees, the Company expects to make total cash contributions of approximately $1 million, $81 million, and $11 million (at December 31, 2025 exchange rates) to its significant U.K., U.S., and other major pension plans, respectively, during 2026. The following table summarizes contributions made to the Company’s significant pension plans (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Contributions to U.K. pension plans $ 1 $ 1 $ 1 $ 2 Contributions to U.S. pension plans 19 17 45 44 Contributions to other major pension plans 4 6 6 8 Total contributions $ 24 $ 24 $ 52 $ 54 13. Derivatives and Hedging The Company is exposed to market risks, including changes in foreign currency exchange rates and interest rates. To manage the risk related to these exposures, the Company enters into various derivative instruments that reduce these risks by creating offsetting exposures. The Company does not enter into derivative transactions for trading or speculative purposes. Foreign Exchange Risk Management The Company is exposed to foreign exchange risk when it earns revenues, pays expenses, enters into monetary intercompany transfers or other transactions denominated in a currency that differs from its functional currency. 24 The Company uses foreign exchange derivatives, typically forward contracts and options, to reduce its overall exposure to the effects of currency fluctuations on cash flows. These exposures are hedged, on average, for less than two years. These derivatives are accounted for as hedges, and changes in fair value are recorded each period in Other comprehensive income (loss) in the Condensed Consolidated Statements of Comprehensive Income. In April 2026, the Company entered into three cross-currency interest rate swap transactions with an aggregate notional amount of $1.0 billion, including two $300 million swaps with 7-year and 10-year maturities and one $400 million swap with a 5-year maturity. The Company uses cross-currency interest rate swaps to hedge a designated portion of its net investments in certain euro-denominated foreign subsidiaries against foreign exchange risk and accounts for these instruments as net investment hedges. For a net investment hedge, the change in fair value of the hedging instrument due to changes in foreign currency exchange rates is recorded in Foreign currency translation adjustments, a component of Accumulated Other Comprehensive Income, to the extent it is effective as a hedge. The Company has elected to assess hedge effectiveness through the use of the spot method based on changes in fair value attributable only to changes in spot exchange rates. The cross-currency basis spread is excluded from the hedge effectiveness assessment. The Company assessed the hedges relationships and determined that they continued to qualify for hedge accounting as of June 30, 2026. The interest rate spread component is recognized using a systematic and rational method over the life of the hedging instruments in Interest expenses. The bi-annual interest settlements recognized are classified as operating activities in the Condensed Consolidated Statements of Cash Flows. Cash flows associated with the exchange of notional principal at the maturity of the swaps will be classified as investing activities in the Condensed Consolidated Statements of Cash Flows. If the net investments are sold or substantially liquidated, the balance of the Foreign currency translation adjustments accumulated in Other comprehensive income (loss) is recognized within Net income. The Company also uses foreign exchange derivatives, typically forward contracts and options, to economically hedge the currency exposure of the Company’s global liquidity profile, including monetary assets or liabilities that are denominated in a non-functional currency of an entity, typically on a rolling 90-day basis, but may be for up to one year in the future. These derivatives are not accounted for as hedges, and changes in fair value are recorded each period in Other income (expense) in the Condensed Consolidated Statements of Income. The notional and fair values of derivative instruments are as follows (in millions): Notional Amount Net Amount of Derivative Assets Presented in the Statements of Financial Position (1) Net Amount of Derivative Liabilities Presented in the Statements of Financial Position (2) June 30, 2026 December 31, 2025 June 30, 2026 December 31, 2025 June 30, 2026 December 31, 2025 Foreign exchange contracts Accounted for as hedges Cash flow hedges $ 476 $ 452 $ 7 $ 19 $ 6 $ 4 Net investment hedges 1,000 — 5 — 3 — Not accounted for as hedges (3) 803 467 3 3 1 — Total $ 2,279 $ 919 $ 15 $ 22 $ 10 $ 4 (1)Included within Other current assets ($10 million at June 30, 2026 and $21 million at December 31, 2025) or Other non-current assets ($5 million at June 30, 2026 and $1 million at December 31, 2025). (2)Included within Other current liabilities ($5 million at June 30, 2026 and $3 million at December 31, 2025) or Other non-current liabilities ($5 million at June 30, 2026 and $1 million at December 31, 2025). (3)These contracts typically are for 90-day durations and executed close to the last day of the most recent reporting month, thereby resulting in nominal fair values at the balance sheet date. 25 The amounts of derivative gains (losses) recognized in Other comprehensive income (loss) in the Condensed Consolidated Statements of Comprehensive Income are as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Foreign exchange contracts Cash flow hedges $ (3) $ 20 $ (8) $ 22 Net investment hedges (1) 2 — 2 — Total $ (1) $ 20 $ (6) $ 22 (1)Amounts represent gains recognized in Other comprehensive income (loss) during the period. As of June 30, 2026, the cumulative amount of gains after taxes recognized related to net investment hedges as Foreign currency translation adjustments in Accumulated other comprehensive income (loss) was $100 million. Refer to Note 11 “Shareholders’ Equity” for additional information regarding the Company’s Accumulated other comprehensive income (loss). The amounts of derivative gains (losses) reclassified from Accumulated other comprehensive loss (income) (“AOCI”) to the Condensed Consolidated Statements of Income are as follows (in millions): Classification of gains (losses) reclassified from AOCI Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Foreign exchange contracts Cash flow hedges Total revenue $ 4 $ 7 $ 6 $ 5 Compensation and benefits (1) — (2) — Interest expense 1 1 1 1 Total $ 4 $ 8 $ 5 $ 6 The cross-currency basis spread that was excluded from the Company’s hedge effectiveness assessment of its net investment hedge was a gain of $2 million for both the three and six months ended June 30, 2026. The Company estimates that approximately less than $1 million of pretax gains currently included within Accumulated other comprehensive loss will be reclassified into earnings in the next twelve months. During the three and six months ended June 30, 2026, the Company recorded a loss of less than $1 million and $4 million, respectively, in Other income (expense) for foreign exchange derivatives not designated or qualifying as hedges. During the three and six months ended June 30, 2025, the Company recorded a gain of $24 million and $37 million, respectively, in Other income (expense) for foreign exchange derivatives not designated or qualifying as hedges. 14. Fair Value Measurements and Financial Instruments Accounting standards establish a three-tier fair value hierarchy that prioritizes the inputs used in measuring fair values as follows: •Level 1 — observable inputs such as quoted prices for identical assets in active markets; •Level 2 — inputs other than quoted prices for identical assets in active markets, that are observable either directly or indirectly; and •Level 3 — unobservable inputs in which there is little or no market data which requires the use of valuation techniques and the development of assumptions. The following methods and assumptions are used to estimate the fair values of the Company’s financial instruments: Money market funds consist of institutional prime, treasury, and government money market funds. The Company reviews treasury and government money market funds to obtain reasonable assurance that the fund net asset value is $1 per share, and reviews the floating net asset value of institutional prime money market funds for reasonableness. Equity investments consist of equity securities and equity derivatives valued using the closing stock price on a national securities exchange. Over-the-counter equity derivatives are valued using observable inputs such as underlying prices of the underlying security and volatility. On a sample basis, the Company reviews the listing of Level 1 equity securities in the portfolio, agrees the closing stock prices to a national securities exchange, and independently verifies the observable inputs for Level 2 equity derivatives and securities. 26 Fixed income investments consist of certain categories of bonds and derivatives. Corporate, government, and agency bonds are valued by pricing vendors who estimate fair value using recently executed transactions and proprietary models based on observable inputs, such as interest rate spreads, yield curves, and credit risk. Asset-backed securities are valued by pricing vendors who estimate fair value using DCF models utilizing observable inputs based on trade and quote activity of securities with similar features. Fixed income derivatives are valued by pricing vendors using observable inputs such as interest rates and yield curves. The Company obtains an understanding of the models, inputs, and assumptions used in developing prices provided by its vendors through discussions with the fund managers. The Company independently verifies the observable inputs, as well as assesses assumptions used for reasonableness based on relevant market conditions and internal Company guidelines. If an assumption is deemed unreasonable, based on internal Company guidelines, it is then reviewed by management and the fair value estimate provided by the vendor is adjusted, if deemed appropriate. These adjustments do not occur frequently and historically are not material to the fair value estimates used in the Condensed Consolidated Financial Statements. Derivatives are carried at fair value, based upon industry standard valuation techniques that use, where possible, current market-based or independently sourced pricing inputs, such as interest rates, currency exchange rates, or implied volatility. Debt is carried at outstanding principal balance, less any unamortized issuance costs, discount or premium. Fair value is based on quoted market prices or estimates using DCF analyses based on current borrowing rates for similar types of borrowing arrangements. The following tables present the categorization of the Company’s assets and liabilities that are measured at fair value on a recurring basis at June 30, 2026 and December 31, 2025 (in millions): Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balance at June 30, 2026 Assets Money market funds (1) $ 3,858 $ — $ — $ 3,858 Other investments Government bonds $ — $ 1 $ — $ 1 Derivatives (2) Cash flow hedges $ — $ 24 $ — $ 24 Net investment hedges $ — $ 5 $ — $ 5 Not accounted for as hedges $ — $ 4 $ — $ 4 Liabilities Derivatives (2) Cash flow hedges $ — $ 24 $ — $ 24 Net investment hedges $ — $ 3 $ — $ 3 Not accounted for as hedges $ — $ 2 $ — $ 2 27 Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balance at December 31, 2025 Assets Money market funds (1) $ 4,998 $ — $ — $ 4,998 Other investments Government bonds $ — $ 1 $ — $ 1 Derivatives (2) Cash flow hedges $ — $ 42 $ — $ 42 Net investment hedges $ — $ — $ — $ — Not accounted for as hedges $ — $ 3 $ — $ 3 Liabilities 0 Derivatives (2) Cash flow hedges $ — $ 27 $ — $ 27 Net investment hedges $ — $ — $ — $ — Not accounted for as hedges $ — $ — $ — $ — (1)Included within Fiduciary assets or Short-term investments in the Condensed Consolidated Statements of Financial Position, depending on their nature and initial maturity. (2)Refer to Note 13 “Derivatives and Hedging” for additional information regarding the Company’s derivatives and hedging activity. There were no transfers of assets or liabilities between fair value hierarchy levels in the three and six months ended June 30, 2026 or 2025. The Company recognized no realized or unrealized gains or losses in the Condensed Consolidated Statements of Income during the three and six months ended June 30, 2026 or 2025 related to assets and liabilities measured at fair value using unobservable inputs. The fair value of debt is classified as Level 2 of the fair value hierarchy. The following table provides the carrying value and fair value for the Company’s term debt (in millions): June 30, 2026 December 31, 2025 Carrying Value Fair Value Carrying Value Fair Value Current portion of long-term debt $ 1,721 $ 1,726 $ 588 $ 589 Long-term debt $ 12,947 $ 12,201 $ 14,660 $ 14,158 15. Claims, Lawsuits, and Other Contingencies Legal Aon and its subsidiaries are subject to numerous claims, tax assessments, lawsuits, and proceedings that arise in the ordinary course of business, which frequently include E&O claims. The damages claimed in these matters are or may be substantial, including, in many instances, claims for punitive, treble, or extraordinary damages. While Aon maintains meaningful E&O insurance and other insurance programs to provide protection against certain losses that arise in such matters, Aon has exhausted or materially depleted its coverage under some of the policies that protect the Company and, consequently, is self-insured or materially self-insured for some claims, including coverage from Aon’s self-insurance program. Accruals for these exposures, and related insurance receivables, when applicable, are included in the Condensed Consolidated Statements of Financial Position and have been recognized in Other general expense in the Condensed Consolidated Statements of Income to the extent that losses are deemed probable and are reasonably estimable. These amounts are adjusted from time to time as developments warrant. Matters that are not probable and reasonably estimable are not accrued for in the financial statements. The Company’s contingencies and exposures are subject to significant uncertainties, and the determination of likelihood of a loss and estimating any such loss can be complex. The Company is therefore, in certain matters, unable to estimate the range of reasonably possible loss. Although management at present believes that the ultimate outcome of such matters, individually or in the aggregate, will not have a material adverse effect on the consolidated financial position of Aon, legal proceedings are subject to inherent uncertainties and unfavorable rulings or other events. Unfavorable resolutions could include substantial monetary or punitive damages imposed on Aon or its subsidiaries. If unfavorable outcomes of these matters were to occur, 28 future results of operations or cash flows for any particular quarterly or annual period could be materially adversely affected. Certain significant legal proceedings involving us or our subsidiaries are described below. Current Matters Aon faces legal action arising out of a fatal plane crash in November 2016. Aon U.K. Limited placed an aviation civil liability reinsurance policy for the Bolivian insurer of the airline. After the crash, the insurer determined that there was no coverage under the airline’s insurance policy due to the airline’s breach of various policy conditions. In November 2018, the owner of the aircraft filed a claim in Bolivia against Aon, the airline, the insurer and the insurance broker. The claim is for $16 million plus any liability the owner has to third parties. In November 2019, a federal prosecutor in Brazil filed a public civil action naming three Aon entities as defendants, along with the airline, the insurer and the lead reinsurer. That claim seeks pecuniary damages for families affected by the crash in the sum of $300 million; or, in the alternative, $50 million; or, in the alternative, $25 million; plus “moral damages” of an equivalent sum. Separately, in March 2020, the Brazilian Federal Senate invited Aon to give evidence to a Parliamentary Commission of Inquiry in an investigation into the accident. Aon cooperated with that inquiry. In August 2020, 43 individuals (surviving passengers and estates of the deceased) filed a motion in the Circuit Court of the 11th Judicial Circuit in and for Miami-Dade County, Florida, seeking permission to commence proceedings against Aon (and the insurer and reinsurers) for claims totaling $844 million. In December 2022, the High Court in England granted an anti-suit injunction, restricting the 43 individuals who previously filed a motion in the Circuit Court of the 11th Judicial Circuit in and for Miami Dade County, Florida, from continuing litigation in the Circuit Court of the 11th Judicial Circuit against Aon. In June 2025, the 43 individuals filed a counterclaim against Aon in the UK seeking damages. The claim is alleged to be governed in the alternative by the laws of three different jurisdictions and asserts damages in the amount of $16.7 million. The claim alleges that certain aspects of the damages have yet to be calculated. Aon believes that it has meritorious defenses and intends to vigorously defend itself against the remaining claims. Certain of the Company’s clients and counterparties have initiated or indicated that they may initiate legal proceedings against the Company following allegations in July 2023 that fraudulent letters of credit were issued in the name of third-party banks in connection with transactions for which capital was arranged by Vesttoo Ltd. (“Vesttoo”). Vesttoo was one of the third parties that identified capital providers to collateralize insurance and reinsurance obligations of the Company’s clients and counterparties, including in connection with property and casualty insurance, cyber insurance, and collateral protection insurance. In certain transactions in which Vesttoo identified third party capital providers to collateralize reinsurance obligations, including transactions in which the Company or its affiliates provided brokerage or other services, some letters of credit from third party banks are alleged to have been fraudulent. The pending or threatened legal proceedings against the Company by clients and counterparties allege, among other theories of liability, that in certain circumstances the Company failed to comply with its alleged duty to procure appropriate letters of credit. In particular, on November 30, 2023, Clear Blue Insurance Company and certain of its affiliates (collectively, “Clear Blue”) filed a lawsuit in New York State Supreme Court against Aon plc and Aon Insurance Managers (Bermuda) Ltd. alleging such claims. Clear Blue and Aon jointly filed a stipulation of dismissal with prejudice on September 26, 2025. On August 8, 2025, the liquidating trust formed to pursue claims on behalf of the Vesttoo bankruptcy estate filed a complaint in the U.S. Bankruptcy Court of Delaware against the Company and certain of its subsidiaries, among other parties. The trust’s complaint alleges, among other theories of liability, that Aon is liable for having induced parties into taking on collateral protection insurance risks, notwithstanding the fact that fraudulent letters of credit had been arranged by Vesttoo employees and co-conspirators. Aon believes that it has meritorious defenses and intends to vigorously defend itself against such claims, and on November 17, 2025, Aon filed a motion to dismiss the matter. On June 23, 2026 the Vesttoo bankruptcy estate filed its opposition to Aon’s motion to dismiss. In the fourth quarter of 2023, the Company recognized actual or anticipated legal settlement expenses in connection with these matters of $197 million, of which a potentially significant amount may be recoverable in future periods. In the third quarter of 2025, certain legal settlement expenses and recoveries were recognized resulting in a $23 million reduction of this amount. Aon has sought and will continue to seek recourse against responsible third parties where appropriate. In addition, in August 2023, joint provisional liquidators were appointed over one of the Company’s subsidiaries in Bermuda with respect to segregated accounts that were impacted by the allegedly fraudulent letters of credit. The joint provisional liquidators were released from their appointment on July 3, 2024. Aon continues to cooperate with regulators in Bermuda, and other regulatory authorities could initiate investigations or proceedings against the Company or third parties. Guarantees and Indemnifications The Company provides a variety of guarantees and indemnifications to its customers and others. The maximum potential amount of future payments represents the notional amounts that could become payable under the guarantees and indemnifications if there were a total default by the guaranteed parties, without consideration of possible recoveries under recourse provisions or other methods. These amounts may bear no relationship to the expected future payments, if any, for these guarantees and indemnifications. Any anticipated amounts payable are included in the Condensed Consolidated Financial Statements, and are recorded at fair value. 29 The Company expects that, as prudent business interests dictate, additional guarantees and indemnifications may be issued from time to time. Guarantee of Registered Securities On June 22, 2023, Aon plc, Aon Global Limited, Aon Global Holdings plc, Aon Corporation, and Aon North America, Inc., and The Bank of New York Mellon Trust Company, N.A., as trustee (the “Trustee”), as applicable, entered into supplemental indentures, each dated June 22, 2023, amending each of the following indentures (as amended, supplemented or modified from time to time) to add for the benefit of the holders of the instruments issued thereunder a full and unconditional guarantee of Aon North America, Inc. thereunder: (i) Second Amended and Restated Indenture, dated April 1, 2020, among Aon Corporation, Aon plc, Aon Global Limited, Aon Global Holdings plc and the Trustee (amending and restating the Amended and Restated Indenture, dated April 2, 2012, amending and restating the Indenture, dated January 13, 1997); (ii) Second Amended and Restated Indenture, dated April 1, 2020, among Aon Corporation, Aon plc, Aon Global Limited, Aon Global Holdings plc and the Trustee (amending and restating the Amended and Restated Indenture, dated April 2, 2012, amending and restating the Indenture, dated September 10, 2010); (iii) Amended and Restated Indenture, dated April 1, 2020, among Aon plc, Aon Corporation, Aon Global Limited, Aon Global Holdings plc and the Trustee (amending and restating the Indenture, dated December 12, 2012); (iv) Second Amended and Restated Indenture, dated April 1, 2020, among Aon plc, Aon Corporation, Aon Global Limited, Aon Global Holdings plc and the Trustee (amending and restating the Amended and Restated Indenture, dated May 20, 2015, amending and restating the Indenture, dated May 24, 2013); (v) Amended and Restated Indenture, dated April 1, 2020, among Aon plc, Aon Corporation, Aon Global Limited, Aon Global Holdings plc and the Trustee (amending and restating the Indenture, dated November 13, 2015); and (vi) Amended and Restated Indenture, dated April 1, 2020, among Aon Corporation, Aon plc, Aon Global Limited, Aon Global Holdings plc and the Trustee (amending and restating the Indenture, dated December 3, 2018). On February 28, 2024, Aon plc, Aon Corporation, Aon Global Holdings plc, and Aon Global Limited (together with Aon plc, Aon Corporation and Aon Global Holdings, plc, the “Guarantors”), Aon North America, Inc. and the Trustee entered into an indenture and first supplemental indenture, each dated March 1, 2024, to add for the benefit of the holders of the instruments issued thereunder a full and unconditional guarantee by the Guarantors of the obligations of Aon North America, Inc. thereunder. Letters of Credit Aon has entered into a number of arrangements whereby the Company’s performance on certain obligations is guaranteed by a third party through the issuance of LOCs. The Company had total LOCs outstanding of approximately $125 million at June 30, 2026, and $124 million at December 31, 2025. These LOCs cover the beneficiaries related to certain of Aon’s U.S. and Canadian secure non-qualified pension plan schemes, reinsurance obligations related to Aon’s own E&O liability insurance program, and secure deductible retentions for Aon’s own workers compensation program. The Company has also obtained LOCs to cover contingent payments for taxes and other business obligations to third parties, and other guarantees for miscellaneous purposes at its international subsidiaries. Premium Payments The Company has certain contractual contingent guarantees for premium payments owed by clients to certain insurance companies. The maximum exposure with respect to such contractual contingent guarantees was approximately $128 million at June 30, 2026 compared to $196 million at December 31, 2025. 16. Segment Information Reportable segments were determined using a management approach. They are consistent with how the CODM assesses the performance of the Company and allocates resources based on two segments: Risk Capital and Human Capital. This segmentation allows the CODM, who is our Chief Executive Officer and President, to align the assessment of performance and allocation of resources, based on segment operating income and operating margin, with how the Company addresses client need, accelerating its Aon United strategy through growth in Risk Capital and Human Capital and maximizing value for Aon and its shareholders. Risk Capital supports clients through its Commercial Risk and Reinsurance solution lines. Commercial Risk includes insurance and specialty brokerage, global risk consulting, captives management, and Affinity programs. Reinsurance includes treaty reinsurance, facultative reinsurance, the Strategy and Technology Group, and capital markets. Human Capital supports clients through its Health and Wealth solution lines. Health includes consulting and brokerage, consumer benefits solutions, and talent advisory services. Wealth includes retirement consulting, pension administration, and 30 investments consulting. Refer to Note 3 “Revenue from Contracts with Customers” for information on revenue by principal service line. The Company does not present assets by reportable segment and this information is not used by the CODM to assess the performance of, or allocate resources to the Company’s reportable segments. As such, segment assets are not provided to the CODM. The following tables include information about Aon’s reportable segments, including total segment revenue, total consolidated revenue, segment operating income, and income before income taxes: Three Months Ended June 30, Risk Capital Human Capital Corporate/Eliminations Total Consolidated 2026 2025 2026 2025 2026 2025 2026 2025 Revenue Total revenue (1) $3,006 $2,866 $1,244 $1,291 $(4) $(2) $4,246 $4,155 Expenses Compensation and benefits 1,528 1,541 715 796 28 23 2,271 2,360 Information technology 106 88 51 45 5 3 162 136 Premises 56 54 28 30 1 1 85 85 Other expenses (2) 400 319 283 303 130 93 813 715 Total operating expenses 2,090 2,002 1,077 1,174 164 120 3,331 3,296 Operating income $916 $864 $167 $117 $(168) $(122) $915 $859 Operating margin 30.5% 30.1% 13.4% 9.1% 21.5% 20.7% Non-operating expenses Interest income 5 — Interest expense (179) (212) Other income (expense) (17) 56 Income before income taxes $724 $703 31 Six Months Ended June 30, Risk Capital Human Capital Corporate/Eliminations Total Consolidated 2026 2025 2026 2025 2026 2025 2026 2025 Revenue Total revenue (1) $6,508 $6,057 $2,783 $2,836 $(11) $(9) $9,280 $8,884 Expenses Compensation and benefits 3,160 3,002 1,474 1,570 30 37 4,664 4,609 Information technology 202 178 97 90 7 4 306 272 Premises 109 106 55 59 2 2 166 167 Other expenses (2) 739 710 547 597 228 209 1,514 1,516 Total operating expenses 4,210 3,996 2,173 2,316 267 252 6,650 6,564 Operating income $2,298 $2,061 $610 $520 $(278) $(261) $2,630 $2,320 Operating margin 35.3% 34.0% 21.9% 18.3% 28.3% 26.1% Non-operating expenses Interest income 17 5 Interest expense (358) (418) Other income (expense) (12) 46 Income before income taxes $2,277 $1,953 (1)Includes fiduciary investment income for the three and six months ended June 30, 2026 of $56 million and $109 million, respectively, in Risk Capital and $2 million and $4 million, respectively, in Human Capital. For the three and six months ended June 30, 2025, includes fiduciary investment income of $60 million and $125 million, respectively, in Risk Capital and $1 million and $2 million, respectively, in Human Capital. (2)Includes expenses related to Depreciation of fixed assets, Amortization and impairment of intangible assets, Accelerating Aon United Program expenses, and Other general expenses. Revenue Reportable segment revenue includes inter-segment revenue of less than $1 million and $5 million, respectively, for Risk Capital and $3 million and $6 million, respectively, for Human Capital for the three and six months ended June 30, 2026, compared to $1 million and $5 million, respectively, for Risk Capital and $2 million and $4 million, respectively, for Human Capital for the three and six months ended June 30, 2025. This inter-segment revenue is eliminated as a Corporate adjustment to reconcile to the Company's Consolidated Total revenue. Segment Operating Expenses The Company’s segment operating expenses are generally attributed to the function of the business. Segment expenses exclude governance costs, post-retirement benefits, and other costs that are not directly attributable to a specific segment. These expenses are considered corporate expenses or eliminations. Non-operating Income (Expenses) The Company’s non-operating income (expenses) primarily consist of Interest income, Interest expense, and Other income (expense) which are not allocated to our reportable segments, as the CODM assesses performance based on operating income results. Interest income represents income earned, net of expense, on operating cash balances, including our multi-currency cash pool, and other income producing investments. Interest income does not include interest earned on funds held on behalf of clients. If interest expense on these assets exceeds interest income for the period, the net amount is reported as interest expense for both the quarterly and year-to-date periods. Interest expense represents the cost of debt obligations and net interest expense on operating cash balances and other income-producing investments, if any. Other income (expense) consists of equity earnings (loss), realized gains or losses on the sale of investments, gains on the disposal of businesses, gains or losses on derivatives, and gains or losses on foreign currency remeasurement. 32