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AON PLC

LISTEDNYSE

SYMBOLAON

SIC6411

STATE OF INC.L2

FISCAL YEAR ENDSDecember 31

CIK315293

INSURANCE AGENTS, BROKERS & SERVICE · LARGE ACCELERATED FILER · 10 FISCAL YEARS OF SEC XBRL DATA, 2016–2025

Fiscal years labelled by the calendar year in which they end. Bars in $ billions; per-share figures as reported.

CAPITALIZATION 12/31/25

($ millions)	Amount	%
Total debt	15,249	62.0
Stockholders' equity	9,352	38.0
Total capitalization	24,601	100.0

212,125,434 shares outstanding at 28 July 2026 (cover page of the 10-Q filed 29 July 2026).

LONG-TERM DEBT 12/31/25

($ millions)	Amount
Long-term debt, incl. current maturities	15,249
Long-term debt, noncurrent	14,660
Current maturities	589

CAPITAL STOCK 12/31/25

Common shares authorized	500,000,000
Common shares issued	214,500,000
Par or stated value per share ($)	0.01
Outstanding at 7/28/26	212,125,434

DIVIDENDS DECLARED/PAID

Fiscal year	Per share $	Payout %
2025	2.91	17.1
2024	2.64	21.1
2023	2.41	19.3
2022	2.19	18.0
2021	1.99	35.9

HISTORY AND BUSINESS

HISTORY: Incorporated in Ireland. Formerly known as AON CORP (to 2 April 2012).

BUSINESS: Classified by the SEC under Standard Industrial Classification 6411, Insurance Agents, Brokers & Service. Large accelerated filer. Principal executive office: 15 Georges Quay, Dublin 2, L2 D02 VR98. Fiscal year ends December 31. For a description of the business, see Item 1 of the latest 10-K.

CONSOLIDATED INCOME ACCOUNT, YEARS ENDED

($ millions)	12/31/25	12/31/24	12/31/23
Total revenues	17,181	15,698	13,376
Income before income taxes	4,759	3,462	3,169
Income taxes	1,009	742	541
Net income	3,695	2,654	2,564
Earned per share, diluted ($)	17.02	12.49	12.51
Dividends per share ($)	2.91	2.64	2.41

CONSOLIDATED BALANCE SHEET

($ millions)	12/31/25	12/31/24
Total investments	192	90
Cash and equivalents	1,195	1,085
Total assets	50,784	48,965
Debt	15,249	17,016
Total liabilities	41,236	42,535
Stockholders' equity	9,352	6,121

TEN-YEAR STATISTICS: FISCAL YEARS ($ millions except per share)

Fiscal year ended	Revenues	Oper. income	Net income	Net margin %	EPS diluted $	Div. per share $	Oper. cash flow	Total assets	Total liabilities	Total debt	Deposits	Stockholders' equity	ROE %	Debt / equity
12/31/25	17,181	4,344	3,695	21.5	17.02	2.91	3,481	50,784	41,236	15,249	–	9,352	39.5	1.63
12/31/24	15,698	3,835	2,654	16.9	12.49	2.64	3,035	48,965	42,535	17,016	–	6,121	43.4	2.78
12/31/23	13,376	3,785	2,564	19.2	12.51	2.41	3,435	33,959	34,701	11,199	–	(826)	-310.4	-13.56
12/31/22	12,479	3,669	2,589	20.7	12.14	2.19	3,219	32,704	33,133	10,770	–	(529)	-489.4	-20.36
12/31/21	12,193	2,090	1,255	10.3	5.55	1.99	2,182	31,917	30,759	9,392	–	1,061	118.3	8.85
12/31/20	11,066	2,781	1,969	17.8	8.45	1.78	2,783	32,114	28,531	7,729	–	3,495	56.3	2.21
12/31/19	11,013	2,169	1,532	13.9	6.37	1.72	1,835	29,405	25,956	7,339	–	3,375	45.4	2.17
12/31/18	10,770	1,544	1,134	10.5	4.59	1.56	1,686	26,422	22,203	6,244	–	4,151	27.3	1.50
12/31/17	9,998	1,065	1,226	12.3	4.70	1.41	734	26,088	21,440	5,966	–	4,583	26.8	1.30
12/31/16	9,409	1,811	1,396	14.8	5.16	1.29	2,326	26,615	21,083	6,205	–	5,475	25.5	1.13

Net margin = net income ÷ revenues; ROE = net income ÷ year-end stockholders’ equity; total debt = long-term debt including current maturities plus short-term borrowings/commercial paper, as tagged in XBRL; capital expenditure and free cash flow are not shown for banks and insurers, where they are not meaningful; d = derived as total assets − total equity where the filing does not tag total liabilities; – = not reported in XBRL for that year.

REGISTRANT:

Aon plc
CIK 315293 · EIN 98-1539969

PRINCIPAL OFFICE:

15 Georges Quay, Dublin 2, L2 D02 VR98
Tel.: 35312666000

INCORPORATED:

Ireland

INDUSTRY (SEC SIC CODE):

6411 · Insurance Agents, Brokers & Service

FILER STATUS:

Large accelerated filer

LATEST ANNUAL REPORT:

10-K for period ended 12/31/25, filed 13 February 2026

FORMER NAMES:

AON CORP

RECENT FILINGS (ANNUAL REPORT REFERENCES BELOW):

9/22/26	8-K	period 9/18/26
9/17/26	8-K	period 9/14/26
9/11/26	8-K	period 9/11/26
8/31/26	8-K	period 8/30/26
8/17/26	8-K	period 8/17/26
7/29/26	10-Q	period 6/30/26
7/29/26	8-K	period 7/29/26
7/1/26	8-K	period 6/26/26

Sources: SEC XBRL company facts (all financial figures) · SEC submissions (registrant, address, SIC, filings) · annual reports: 10-K FY2025 (filed 2/13/26) · 10-K FY2024 (filed 2/18/25) · 10-K FY2023 (filed 2/16/24) · 10-K FY2022 (filed 2/17/23) · 10-K FY2021 (filed 2/18/22) · 10-K FY2020 (filed 2/19/21) · 10-K FY2019 (filed 2/14/20) · 10-K FY2018 (filed 2/19/19). Values are the latest figures filed for each fiscal year (restated where a later 10-K restated them). Ratios and free cash flow are Pathos calculations from those figures. Retrieved 31 October 2026.