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Companies / Financials / Aon plc
AON

Aon plc

FinancialsInsuranceS&P 500
Ticker AONDUBLIN 2, L2Fiscal year ends DecemberBook value per share $44.73Diluted shares 214.6M

Aon plc (NYSE: AON) is a global professional services firm that provides risk and people-related advice, brokerage, consulting and analytics to organizations across industries and market segments. It operates through two reportable segments: Risk Capital, which generated $11.3 billion of 2025 revenue, and Human… From the company’s description.

In fiscal 2025, Aon plc reported revenue of $17.18B, up 9.4% from fiscal 2024, and net income of $3.75B. Its operating margin was 25.3%, and operations generated $3.48B in cash. Over the twelve months to Jun 30, 2026, revenue was $17.58B.

Fiscal year 2025 · ends 12-31Changes are against fiscal 2024The amber dot is the latest twelve months, to 2026-06-30
Sales & profitability
$17.18BFY2025
+9.4% year over year
Last 12 mo $17.58B
25.28%FY2025
+0.9 percentage points
Last 12 mo 26.48%
$3.75BFY2025
+37.9% year over year
Last 12 mo $3.98B
42.59%FY2025
−5.8 percentage points
Last 12 mo 40.78%
Cash & financing
$3.48BFY2025
+14.7% year over year
Last 12 mo $3.53B
$3.22BFY2025
+14.2% year over year
Last 12 mo $3.25B
1.63FY2025
Was 2.78× a year earlier
Last 12 mo 1.56
217.1MFY2025
+2.2% year over year
Last 12 mo 214.6M

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 global professional services firm that provides risk and people-related advice, brokerage, consulting and analytics to organizations across industries and market segments. It operates through two reportable segments: Risk Capital, which generated $11.3 billion of 2025 revenue, and Human Capital, which generated $5.9 billion before intercompany eliminations. Risk Capital includes Commercial Risk Solutions, such as insurance and specialty brokerage, risk consulting, captive management and affinity programs, and Reinsurance Solutions, which provides treaty and facultative reinsurance, analytics, capital markets and related advisory services. Human Capital includes Health Solutions, covering health and benefits, consumer benefits and talent advisory, and Wealth Solutions, focused on retirement, pension administration and investment consulting. Aon serves clients in more than 120 countries and had approximately 60,000 employees at year-end 2025. Its website is https://www.aon.com.

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 · USD
$-1.76B$3.52B$8.79B$14.06B$19.33B2013201420152016201720182019202020212022202320242025Last 12 moLast 12 monthsLast 12 months

The 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.

Ownership

Who owns Aon plc — and what changed

Funds as of 2026Q2 · superinvestors as of 2026-06-30

252
funds hold it
4 of 35
superinvestors hold it
$12.01B
held by funds, at market
17.2%
of shares held by funds

Superinvestors in Aon plc · what they did last quarter

Seth KlarmanDECREASED -10.7%
Baupost Group
4.2%of 13F portfolio
Wallace WeitzUNCHANGED
Weitz Investment Management
4.9%of 13F portfolio
Polen CapitalDECREASED -87.9%
Polen Capital Management
0.5%of 13F portfolio

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

VANGUARD TOTAL STOCK MARKET INDEX FUND
VTI · VANGUARD INDEX FUNDS
0.09%of fund net assets
VANGUARD 500 INDEX FUND
VOO · VANGUARD INDEX FUNDS
0.11%of fund net assets
Dodge & Cox Stock Fund
DODGX · Dodge & Cox Funds
1.03%of fund net assets
Dodge & Cox International Stock Fund
DODFX · Dodge & Cox Funds
1.25%of fund net assets
VANGUARD MID-CAP INDEX FUND
VO · VANGUARD INDEX FUNDS
0.33%of fund net assets

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.

Connected research

Put this business in context.

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