Fundamentals · 2026-09-09S&P 500ANNUAL BASIS

Aon plc

AON stock analysis · Financials · Insurance Brokers

FY 2025-12-31ANNUAL FILINGS
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These are research estimates based on annual filings. Valuation uses a cash-flow proxy and explicit assumptions; prices are not live. Published valuations use annual periods first filed by the price date, with later restatements retained.
Reference share price · USD
$331.69HISTORICAL SNAPSHOT

As of · fund-implied per-share value

Fund holding value ÷ shares held. Not a live quote; not adjusted for later stock splits.

View SEC fund filing ↗
Estimated issuer market cap
$70.8B

Price × SEC outstanding shares. Shares measured 2026-04-30. Approximate; share and price dates can differ.

View share-count filing ↗
Reviewed cash-flow model

Reviewed operating-business exception limited to this annual period. Aon is a professional-services firm providing risk, broking, human-capital and related advisory services. Its fiduciary assets and liabilities are separately reported; cash reported as corporate cash is distinct from client funds. FY2025 capex includes capitalized software. Reviewed equity is consolidated ($9.459bn), while parent equity remains $9.352bn. Fiduciary assets still enlarge the accrual denominator. Consolidated FCF is an ownership proxy; ordinary and redeemable minority interests require a dated claim bridge before DCF and reverse DCF. Business description ↗

Valuation

DCF value

Consolidated cash flow includes noncontrolling interests. A dated valuation bridge for those claims has not been reviewed, so per-share DCF and reverse DCF remain unavailable.

Consolidated cash flow includes noncontrolling interests. A dated valuation bridge for those claims has not been reviewed, so per-share DCF and reverse DCF remain unavailable.

How this is calculated ↗
Valuation

Reverse DCF

Consolidated cash flow includes noncontrolling interests. A dated valuation bridge for those claims has not been reviewed, so per-share DCF and reverse DCF remain unavailable.

Consolidated cash flow includes noncontrolling interests. A dated valuation bridge for those claims has not been reviewed, so per-share DCF and reverse DCF remain unavailable.

How this is calculated ↗
Valuation

Relative valuation

-11.3%

69 sector peers · median 17.0×

How this is calculated ↗
Valuation

Historical multiples

30.3×

7 annual observations · snapshot P/E 19.2× · -36.7% versus history

How this is calculated ↗
Valuation

Free cash flow yield

4.5%

Annual basis · read assumptions below

How this is calculated ↗
Quality

ROIC / quality

15.0%

Normalized tax · financing-capital proxy · short-term borrowing coverage incomplete

How this is calculated ↗
Valuation

Value composite

33/100

Annual basis · read assumptions below

How this is calculated ↗
Momentum

12–1 price momentum

Split and corporate-action verification is incomplete for these fund observations. Verified adjusted endpoints are required for 12–1 momentum.

Split and corporate-action verification is incomplete for these fund observations. Verified adjusted endpoints are required for 12–1 momentum.

How this is calculated ↗
Investment

Asset growth

3.7%

Annual basis · read assumptions below

How this is calculated ↗
Investment

Net payout yield

2.2%

Annual basis · read assumptions below

How this is calculated ↗
Quality

Accrual quality

0.5%

Annual basis · read assumptions below

How this is calculated ↗
Momentum

Fundamental momentum

3.7%

Annual basis · read assumptions below

How this is calculated ↗

Follow the cash

ANNUAL · USD

Operating cash flow and reinvestment over time

USD · bar maximum 3.5B2020-12-31: cfo $2,783,000,000.002020-12-31: capex $141,000,000.0020202021-12-31: cfo $2,182,000,000.002021-12-31: capex $137,000,000.0020212022-12-31: cfo $3,219,000,000.002022-12-31: capex $196,000,000.0020222023-12-31: cfo $3,435,000,000.002023-12-31: capex $252,000,000.0020232024-12-31: cfo $3,035,000,000.002024-12-31: capex $218,000,000.0020242025-12-31: cfo $3,481,000,000.002025-12-31: capex $263,000,000.002025
Operating cash flowCapital expenditure

Annual USD. Negative bars use a compressed lower scale. Hover or inspect the financial history table for exact values.

Make the assumptions yours

Personal inputs stay in this browser. Blank fields retain published inputs. Five-year forecast; zero net borrowing. Required return must exceed terminal growth.

How sensitive is the valuation?

DCF per-share sensitivity · includes reviewed preferred and minority-owner claims · rows: required return · columns: growth
Return / Growth3.0%5.0%7.0%
8.0%
10.0%
12.0%

Annual financial history

Open SEC filings ↗
Fiscal year-endRevenueNet incomeOperating cash flowCapital expenditureAssets
2025-12-3117.2B3.8B3.5B263M50.8B
2024-12-3115.7B2.7B3B218M49B
2023-12-3113.4B2.6B3.4B252M34B
2022-12-3112.5B2.6B3.2B196M32.7B
2021-12-3112.2B1.3B2.2B137M31.9B
2020-12-3111.1B2B2.8B141M32.1B
2019-12-3111B1.6B1.8B225M29.4B
2018-12-3110.8B1.2B1.7B240M26.4B

USD, abbreviated. Restated annual history; not a point-in-time backtest. Missing values appear as dashes.

Trace the inputs

MODEL ANNUAL PERIOD
InputValueSEC tag / sourceFiled
revenue17.2BRevenueFromContractWithCustomerExcludingAssessedTax2026-02-13
netIncome3.8BProfitLoss
Explicit consolidated amount, including the portion attributable to noncontrolling interests.
2026-02-13
Parent/common earnings proxy3.7BNetIncomeLoss2026-02-13
cfo3.5BNetCashProvidedByUsedInOperatingActivities2026-02-13
capex263MPaymentsToAcquirePropertyPlantAndEquipment2026-02-13
operatingIncome4.3BOperatingIncomeLoss2026-02-13
assets50.8BAssets2026-02-13
equity9.5BReviewed manual correction
Consolidated statement of financial position: parent equity $9,352m plus $107m ordinary noncontrolling interests. The separately stored parentEquity is unchanged; redeemable interests presented outside equity are not added to book equity.
2026-02-13
Parent book equity proxy9.4BStockholdersEquity2026-02-13
debt15.2BLongTermDebt2026-02-13
shortDebtNot reported under a supported tag
cash1.2BCashAndCashEquivalentsAtCarryingValue2026-02-13
shares217.1MWeightedAverageNumberOfDilutedSharesOutstanding2026-02-13
dividends629MPaymentsOfDividendsCommonStock2026-02-13
buybacks1BPaymentsForRepurchaseOfEquity2026-02-13
issuance70MProceedsFromIssuanceOfCommonStock2026-02-13