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Aon plc (AON)

Aon plc at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

Aon plc (AON) is a Insurance - Brokers company based in IE with a market capitalization of $67.5B. Revenue grew 9.4% year-over-year and the company generated $3.2B in free cash flow. This page tracks AON's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

IE · 60K employees · IPO Jun 2, 1980

Valuation

Valuation & price

$321.52 · as of May 26, 2026 · -14.3% vs 52w high

18.8

P/E ratio

Latest-FY diluted EPS

7.22

P/B ratio

Market cap ÷ book equity

—

Dividend yield

Price — last 12 months

$375$342$308Jul 25Dec 25Jul 26Jul 7, 25$353.23Jul 9, 25$356.92Jul 11, 25$355.67Jul 15, 25$352.38Jul 17, 25$354.63Jul 21, 25$350.91Jul 23, 25$357.28Jul 25, 25$372.89Jul 29, 25$354.03Jul 31, 25$355.71Aug 4, 25$360.40Aug 6, 25$363.68Aug 11, 25$368.09Aug 13, 25$370.92Aug 15, 25$367.01Aug 19, 25$372.86Aug 21, 25$375.27Aug 25, 25$370.94Aug 27, 25$368.37Aug 29, 25$367.00Sep 3, 25$374.00Sep 5, 25$370.54Sep 9, 25$366.38Sep 11, 25$372.25Sep 16, 25$356.57Sep 18, 25$352.76Sep 22, 25$353.46Sep 24, 25$353.74Sep 26, 25$356.08Sep 30, 25$356.58Oct 2, 25$360.73Oct 6, 25$365.70Oct 8, 25$365.38Oct 10, 25$360.15Oct 14, 25$360.51Oct 16, 25$343.12Oct 21, 25$343.43Oct 23, 25$341.35Oct 27, 25$336.87Oct 29, 25$326.07Oct 31, 25$340.68Nov 4, 25$344.21Nov 6, 25$340.00Nov 10, 25$344.87Nov 12, 25$350.11Nov 14, 25$350.13Nov 18, 25$348.54Nov 20, 25$345.89Nov 25, 25$350.96Nov 28, 25$353.92Dec 2, 25$345.70Dec 4, 25$347.71Dec 8, 25$343.39Dec 10, 25$340.05Dec 12, 25$353.79Dec 16, 25$351.80Dec 18, 25$353.02Dec 22, 25$355.46Dec 24, 25$356.65Dec 29, 25$356.73Jan 2, 26$344.27Jan 6, 26$349.67Jan 8, 26$351.97Jan 12, 26$350.49Jan 14, 26$346.00Jan 16, 26$343.86Jan 21, 26$332.76Jan 23, 26$338.69Jan 27, 26$330.75Jan 29, 26$342.95Feb 2, 26$349.61Feb 4, 26$350.21Feb 9, 26$310.34Feb 11, 26$309.97Feb 13, 26$321.70Feb 18, 26$322.98Feb 20, 26$325.07Feb 24, 26$319.33Feb 26, 26$330.27Mar 2, 26$337.80Mar 4, 26$341.18Mar 6, 26$340.60Mar 10, 26$320.96Mar 12, 26$315.91Mar 17, 26$321.18Mar 19, 26$316.99Mar 23, 26$325.97Mar 25, 26$321.45Mar 27, 26$313.66Mar 31, 26$322.78Apr 2, 26$323.14Apr 7, 26$322.47Apr 9, 26$325.40Apr 13, 26$325.40Apr 15, 26$328.08Apr 17, 26$331.80Apr 22, 26$326.86Apr 24, 26$321.14Apr 28, 26$321.68Apr 30, 26$311.65May 4, 26$314.92May 6, 26$308.27May 8, 26$312.79May 12, 26$316.35May 14, 26$315.41May 18, 26$326.57May 20, 26$321.15May 22, 26$324.78May 28, 26$318.30Jun 1, 26$320.41Jun 3, 26$315.60Jun 5, 26$328.53Jun 9, 26$331.59Jun 11, 26$335.17Jun 15, 26$329.51Jun 17, 26$326.69Jun 22, 26$313.63Jun 24, 26$325.48Jun 26, 26$328.69Jul 2, 26$357.46
$308.2752-week range$375.27
Loading valuation history…

Fundamentals

Key fundamentals

$67.5B

Market cap

9.4%

Revenue growth (YoY)

47.7%

Gross margin

$3.2B

Free cash flow (USD)

$13.7B

Net debt

1.8%

Share dilution

3/5

Graham criteria passed

Defensive-investor screen

Financial Services

Sector

Trajectory

Long-term trends

Revenue by year

2016 → 2025

FY 2016$9.4BFY 2017$10.0BFY 2018$10.8BFY 2019$11.0BFY 2020$11.1BFY 2021$12.2BFY 2022$12.5BFY 2023$13.4BFY 2024$15.7BFY 2025$17.2B
$9.4B$17.2B

Free cash flow by year

2016 → 2025

FY 2016$2.1BFY 2017$551.0MFY 2018$1.4BFY 2019$1.6BFY 2020$2.6BFY 2021$2.0BFY 2022$3.0BFY 2023$3.2BFY 2024$2.8BFY 2025$3.2B
$2.1B$3.2B

Gross margin by year

2021 → 2025

FY 202144.7%FY 202248.1%FY 202348.4%FY 202447.2%FY 202547.7%
44.7%47.7%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

0

Insider sells · 90 days

Earnings

Last report: 10-Q filed May 1, 2026

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • FinancingSecurities RegistrationJul 2, 2026Filing
  • 8-K eventShare Repurchase IncreaseJul 1, 2026Filing
  • 8-K eventEarnings ReleaseMay 1, 2026Filing
  • Quarterly report10-Q FiledMay 1, 2026Filing

Questions

Frequently asked questions

What is Aon plc's market cap?

Aon plc (AON) has a market capitalization of $67.5B.

What is AON's P/E ratio?

AON trades at a price-to-earnings ratio of 18.8, based on its latest fiscal-year diluted earnings per share and the most recent cached price.

What is AON's price-to-book (P/B) ratio?

AON trades at 7.22 times book value per share.

Are insiders buying AON stock?

SEC Form 4 filings show no open-market insider buys at Aon plc in the last 90 days (0 sells).

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Timeline

Every filing, insider trade & earnings on a price-anchored timeline

Filing Analyzer

Search the actual 10-K / 10-Q text with AI research angles

News

Latest press coverage in one feed

Data: SEC EDGAR filings and cached fundamental data; prices and ratios use the most recent cached quote and statements (may lag by up to a day). Educational and research purposes only. Not investment advice.