Aon PLC
Aon plc, a professional services firm, provides a range of risk and human capital solutions worldwide. It offers commercial risk solutions, including retail brokerage, specialty solutions, global risk consulting and captive management, and affinity programs; and health solutions, such as consulting and brokerage, consumer benefit, and talent advisory services. The company also provides insurance-… Read more
Market Cap & Net Worth: Aon PLC (AON)
Aon PLC (NYSE:AON) has a market capitalization of $68.89 Billion ($68.89 Billion) as of March 18, 2026. Listed on the NYSE stock exchange, this USA-based company holds position #320 globally and #253 in its home market, demonstrating a -3.50% decrease in market value over the past year.
Market capitalization, also known as net worth in stock markets, is calculated by multiplying Aon PLC's stock price $321.18 by its total outstanding shares 214500000 (214.50 Million).
Aon PLC Market Cap History: 2015 to 2026
Aon PLC's market capitalization history from 2015 to 2026. Data shows growth from $18.18 Billion to $68.89 Billion (13.87% CAGR).
Index Memberships
Aon PLC is a constituent of 1 market index:
| Index | Total Market Cap | Weight (%) | Rank by Market Cap |
|---|---|---|---|
|
S&P 500 Index
GSPC
|
$53.17 Trillion | 0.18% | #153 of 503 |
Weight: Aon PLC's market cap as a percentage of total index value. Rank: Position among all constituents by market cap.
Aon PLC Market Cap to Earnings & Revenue Ratios Timeline
This chart shows how Aon PLC's valuation ratios have evolved. The Price to Sales (P/S) ratio compares market cap to revenue, while the Price to Earnings (P/E) ratio compares market cap to net income. Lower values may indicate a more undervalued company relative to its financial performance.
Latest Price to Sales (P/S) Ratio
4.41x
Aon PLC's market cap is 4.41 times its annual revenue
1.93x
Higher than industry averageLatest Price to Earnings (P/E) Ratio
20.49x
Aon PLC's market cap is 20.49 times its annual earnings
23.84x
Lower than industry averageWhat These Ratios Tell Investors:
- Price to Sales (P/S) Ratio: Shows how much investors are paying for each dollar of the company's sales. Lower P/S ratios may indicate undervaluation.
- Price to Earnings (P/E) Ratio: Shows how much investors are paying for each dollar of the company's earnings. This is one of the most common valuation metrics.
- Trends in these ratios over time can indicate changing investor sentiment about the company's future growth prospects.
- Industry comparison provides context for whether the company is valued higher or lower than peers.
| Year | Market Cap (USD) | Revenue (USD) | Net Income (USD) | P/S Ratio | P/E Ratio |
|---|---|---|---|---|---|
| 2016 | $22.27 Billion | $9.41 Billion | $1.40 Billion | 2.37x | 15.95x |
| 2017 | $27.05 Billion | $10.00 Billion | $1.23 Billion | 2.71x | 22.06x |
| 2018 | $29.66 Billion | $10.77 Billion | $1.13 Billion | 2.75x | 26.15x |
| 2019 | $42.91 Billion | $11.01 Billion | $1.53 Billion | 3.90x | 28.01x |
| 2020 | $43.92 Billion | $11.07 Billion | $1.97 Billion | 3.97x | 22.31x |
| 2021 | $62.98 Billion | $12.19 Billion | $1.25 Billion | 5.17x | 50.18x |
| 2022 | $63.36 Billion | $12.48 Billion | $2.59 Billion | 5.08x | 24.47x |
| 2023 | $61.90 Billion | $13.38 Billion | $2.56 Billion | 4.63x | 24.14x |
| 2024 | $77.04 Billion | $15.70 Billion | $2.65 Billion | 4.91x | 29.03x |
| 2025 | $75.69 Billion | $17.18 Billion | $3.69 Billion | 4.41x | 20.49x |
Competitor Companies of AON by Market Capitalization
Companies near Aon PLC in the global market cap rankings as of March 18, 2026.
Key companies related to Aon PLC by market ranking:
- Marsh & McLennan Companies Inc (NYSE:MMC): Ranked #226 globally with a market cap of $89.35 Billion USD.
- Arthur J Gallagher & Co (NYSE:AJG): Ranked #417 globally with a market cap of $52.50 Billion USD.
- Willis Towers Watson PLC (NASDAQ:WTW): Ranked #741 globally with a market cap of $27.45 Billion USD.
- Brown & Brown Inc (NYSE:BRO): Ranked #978 globally with a market cap of $20.06 Billion USD.
| Rank | Company | Symbol | Market Cap | Price |
|---|---|---|---|---|
| #226 | Marsh & McLennan Companies Inc | NYSE:MMC | $89.35 Billion | $182.70 |
| #417 | Arthur J Gallagher & Co | NYSE:AJG | $52.50 Billion | $209.16 |
| #741 | Willis Towers Watson PLC | NASDAQ:WTW | $27.45 Billion | $289.86 |
| #978 | Brown & Brown Inc | NYSE:BRO | $20.06 Billion | $68.33 |
Aon PLC Historical Marketcap From 2015 to 2026
Between 2015 and today, Aon PLC's market cap moved from $18.18 Billion to $ 68.89 Billion, with a yearly change of 13.87%.
| Year | Market Cap | Change (%) |
|---|---|---|
| 2026 | $68.89 Billion | -8.98% |
| 2025 | $75.69 Billion | -1.75% |
| 2024 | $77.04 Billion | +24.45% |
| 2023 | $61.90 Billion | -2.31% |
| 2022 | $63.36 Billion | +0.61% |
| 2021 | $62.98 Billion | +43.39% |
| 2020 | $43.92 Billion | +2.37% |
| 2019 | $42.91 Billion | +44.68% |
| 2018 | $29.66 Billion | +9.64% |
| 2017 | $27.05 Billion | +21.49% |
| 2016 | $22.27 Billion | +22.50% |
| 2015 | $18.18 Billion | -- |
End of Day Market Cap According to Different Sources
On Mar 18th, 2026 the market cap of Aon PLC was reported to be:
| Source | Market Cap |
|---|---|
| Yahoo Finance | $68.89 Billion USD |
| MoneyControl | $68.89 Billion USD |
| MarketWatch | $68.89 Billion USD |
| marketcap.company | $68.89 Billion USD |
| Reuters | $68.89 Billion USD |
Market cap values may vary slightly between sources due to differences in calculation methods, timing, and data refresh rates.