Aon plc (AON): financials, SEC filings and peers

Aon plc (AON) is an insurance brokers company in the Financials sector of the S&P 500, headquartered in London, United Kingdom.

It was founded in 1982 and joined the S&P 500 on April 23, 1996.

Its fiscal year ends in December, and its shares trade on the NYSE.

In its SEC filings it is classified as “Insurance Agents, Brokers & Service”.

Aon plc at a glance

Revenue (12 months): $17.7B
Revenue growth: +3.8%
Operating margin: 26.3%
Net income (12 months): $3.9B
Free cash flow (12 months): $3.3B
Cash: $2.0B
Debt: $28.0B
Diluted EPS (12 months): $18.25

Twelve months to September 30, 2026, from the 10-Q filed October 28, 2026.

Latest twelve months

Over the twelve months to September 30, 2026, Aon plc reported revenue of $17.7 billion, about the same as a year earlier (+3.8%).

Its operating margin was 26.3%, up 1.5 percentage points from a year earlier: for every $100 of sales, about $26 was left as operating profit.

Net income was $3.9 billion (22.2% of revenue), 44.7% higher than a year earlier.

Operating cash flow was $3.6 billion and capital spending $308 million, leaving free cash flow of $3.3 billion (18.5% of revenue).

At the end of the period it held $2.0 billion in cash and $28.0 billion in debt, a net debt position of $26.0 billion.

The diluted share count fell 1.7% in a year, typically the result of buybacks.

Five-year trend

Revenue went from $11.1 billion in fiscal 2020 to $17.2 billion in fiscal 2025, about 9.2% a year.
Revenue has grown for 5 fiscal years in a row.
Operating margin has been steady, around 25.3%.
Free cash flow was positive in each of the last 6 fiscal years.

Fiscal year	2021	2022	2023	2024	2025
Revenue	$12.2B	$12.5B	$13.4B	$15.7B	$17.2B
Revenue growth	10.2%	2.3%	7.2%	17.4%	9.4%
Operating margin	17.1%	29.4%	28.3%	24.4%	25.3%
Net income	$1.3B	$2.6B	$2.6B	$2.7B	$3.7B
Free cash flow	$2.0B	$3.0B	$3.2B	$2.8B	$3.2B
Diluted EPS	$5.55	$12.14	$12.51	$12.49	$17.02

Fiscal years as reported in Aon plc’s 10-K filings. Free cash flow is operating cash flow minus capital spending.

Recent SEC filings

10-Q filed October 28, 2026 — quarterly report
8-K filed October 28, 2026 — Earnings results
8-K filed September 22, 2026 — Material agreement; Agreement terminated
8-K filed September 17, 2026 — Other event
8-K filed September 11, 2026 — Other event
8-K filed August 31, 2026 — Material agreement; Regulation FD disclosure
8-K filed August 17, 2026 — Executive or director change
10-Q filed July 29, 2026 — quarterly report

All Aon plc filings on SEC EDGAR

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Questions about Aon plc

Is Aon plc's revenue growing?

Yes. Revenue for the twelve months to September 30, 2026 was $17.7 billion, up 3.8% from a year earlier, according to its SEC filings.

Is Aon plc profitable?

Yes. It earned $3.9 billion in net income over the twelve months to September 30, 2026, a net margin of 22.2%.

Does Aon plc have more cash or more debt?

At September 30, 2026 it had $2.0 billion in cash and $28.0 billion in debt, so more debt than cash.

When did Aon plc last file financial results?

Its latest quarterly report (10-Q) was filed with the SEC on October 28, 2026.

Which companies are similar to Aon plc?

In the S&P 500, Aon plc is grouped in Insurance Brokers within the Financials sector. Arthur J. Gallagher & Co. (AJG), Brown & Brown (BRO), Erie Indemnity (ERIE), Marsh McLennan (MRSH), Willis Towers Watson (WTW) are in the same group.

Understand the numbers

Source: Aon plc’s filings with the U.S. Securities and Exchange Commission (EDGAR), retrieved November 11, 2026. Figures are as reported by the company and may be restated. This page is for information only and is not financial advice.