Aon plc
Aon plc (NYSE: AON) is a leading global professional services firm headquartered in Ireland and operating through its website at aon.com. The company serves clients in more than 120 countries across all market segments and nearly every industry, providing actionable analytic insight, risk capital expertise, and human… From the company’s description.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What Aon plc does
In the company’s own words
Aon plc (NYSE: AON) is a leading global professional services firm headquartered in Ireland and operating through its website at aon.com. The company serves clients in more than 120 countries across all market segments and nearly every industry, providing actionable analytic insight, risk capital expertise, and human capital solutions that help organizations make better risk and people decisions.
Aon operates through two primary reportable segments. The Risk Capital segment, which generated approximately 66% of 2025 revenue at $11,290 million, encompasses Commercial Risk Solutions, Reinsurance Solutions, and related services. Commercial Risk Solutions provides brokerage and consulting services including insurance and specialty brokerage, global risk consulting, captives management, and affinity programs across property, casualty, financial and professional lines, construction, transportation, energy, cyber, and other specialized areas. Reinsurance Solutions includes treaty reinsurance, facultative reinsurance, strategic consulting, and capital markets advisory services. The Human Capital segment contributed approximately 34% of revenue at $5,907 million and includes Health Solutions, which offers consulting, brokerage, consumer benefits, compensation, and talent advisory services, and Wealth Solutions, providing retirement consulting, pension administration, and investment advisory services.
The company employs approximately 60,000 colleagues globally and generated consolidated total revenue of $17,181 million in 2025. Aon's business model centers on higher-margin, capital-light professional services with recurring revenue streams and strong cash flow generation. The company generates revenues primarily through commissions from insurance and reinsurance companies, fees for consulting and analytics services, and client fees for advice and consulting services. Aon typically holds funds on behalf of clients, including premiums and claims in transit, which are segregated and invested in interest-bearing premium trust accounts.
The company competes with numerous global, regional, and local firms including Marsh McLennan, Willis Towers Watson, Arthur J Gallagher & Company, and Lockton Companies, as well as insurance companies marketing directly and emerging technology-enabled competitors. Aon's competitive advantages include its extensive global data and analytics capabilities, proprietary tools and platforms, integrated Risk Capital and Human Capital expertise, and the Aon United strategy that delivers coordinated solutions across the firm's service lines.
Company details
- Sector
- Financials
- Industry (SIC)
- Insurance
- Headquarters
- DUBLIN 2, L2
- Fiscal year end
- December
- CIK
- 315293
- SIC
- 6411
Financial performance, year by year
Fiscal 2013–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns Aon plc — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Superinvestors in Aon plc · what they did last quarter
Share of each manager’s reported 13F portfolio. Change is in shares held, since the previous quarter.
Largest fund holders · Aon plc’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Fund ownership is a subset of institutional 13F ownership — the two describe overlapping populations and must not be added together.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
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