Aon PLC Market Cap ($68.23 Billion)
Market Cap & Net Worth: Aon PLC (AON)
Aon PLC market cap. Aon PLC (NYSE:AON) has a market capitalization of $68.23 Billion ($68.23 Billion) as of October 31, 2026. Listed on the NYSE stock exchange, this USA-based company holds position #419 globally and #219 in its home market, demonstrating a 9.27% increase 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 $321.64 by its total outstanding shares 212125434 (212.13 Million).
Aon PLC Market Cap History (2015–2026)
Aon PLC market cap history from 2015 to 2026. Data shows growth from $17.98 Billion to $68.23 Billion (13.06% CAGR). Check Aon PLC stock price for real-time trading data and today's change.
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
|
$62.23 Trillion | 0.18% | #173 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. Also see cash flow conversion of Aon PLC for how efficiently the company converts equity into cash flow.
Latest Price to Sales (P/S) Ratio
4.36x
Aon PLC's market cap is 4.36 times its annual revenue
Latest Price to Earnings (P/E) Ratio
20.26x
Aon PLC's market cap is 20.26 times its annual earnings
What 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 | $22.02 Billion | $9.41 Billion | $1.40 Billion | 2.34x | 15.77x |
| 2017 | $26.75 Billion | $10.00 Billion | $1.23 Billion | 2.68x | 21.82x |
| 2018 | $29.33 Billion | $10.77 Billion | $1.13 Billion | 2.72x | 25.86x |
| 2019 | $42.43 Billion | $11.01 Billion | $1.53 Billion | 3.85x | 27.70x |
| 2020 | $43.44 Billion | $11.07 Billion | $1.97 Billion | 3.93x | 22.06x |
| 2021 | $62.28 Billion | $12.19 Billion | $1.25 Billion | 5.11x | 49.63x |
| 2022 | $62.66 Billion | $12.48 Billion | $2.59 Billion | 5.02x | 24.20x |
| 2023 | $61.22 Billion | $13.38 Billion | $2.56 Billion | 4.58x | 23.88x |
| 2024 | $76.19 Billion | $15.70 Billion | $2.65 Billion | 4.85x | 28.71x |
| 2025 | $74.85 Billion | $17.18 Billion | $3.69 Billion | 4.36x | 20.26x |
Competitor Companies of AON by Market Capitalization
Companies near Aon PLC in the global market cap rankings as of October 31, 2026. See net asset quality index of Aon PLC to understand what proportion of total assets are financed by equity.
Key companies related to Aon PLC by market ranking:
- Marsh & McLennan Companies Inc (NYSE:MMC): Ranked #301 globally with a market cap of $89.51 Billion USD.
- Marsh & McLennan Companies, Inc. (NYSE:MRSH): Ranked #319 globally with a market cap of $85.27 Billion USD.
- Arthur J Gallagher & Co (NYSE:AJG): Ranked #457 globally with a market cap of $59.65 Billion USD.
- Aon PLC (F:4VK): Ranked #473 globally with a market cap of $56.77 Billion USD ( €48.56 Billion EUR).
| Rank | Company | Symbol | Market Cap | Price |
|---|---|---|---|---|
| #301 | Marsh & McLennan Companies Inc | NYSE:MMC | $89.51 Billion | $182.70 |
| #319 | Marsh & McLennan Companies, Inc. | NYSE:MRSH | $85.27 Billion | $197.03 |
| #457 | Arthur J Gallagher & Co | NYSE:AJG | $59.65 Billion | $268.20 |
| #473 | Aon PLC | F:4VK | $56.77 Billion | €284.00 |
Market Capitalization of Aon PLC (2015–2026)
Market capitalization of Aon PLC from 2015 to today. Between 2015 and today, Aon PLC's market cap moved from $17.98 Billion to $ 68.23 Billion, with a yearly change of 13.06%.
| Year | Market Cap | Change (%) |
|---|---|---|
| 2026 | $68.23 Billion | -8.85% |
| 2025 | $74.85 Billion | -1.75% |
| 2024 | $76.19 Billion | +24.45% |
| 2023 | $61.22 Billion | -2.31% |
| 2022 | $62.66 Billion | +0.61% |
| 2021 | $62.28 Billion | +43.39% |
| 2020 | $43.44 Billion | +2.37% |
| 2019 | $42.43 Billion | +44.68% |
| 2018 | $29.33 Billion | +9.64% |
| 2017 | $26.75 Billion | +21.49% |
| 2016 | $22.02 Billion | +22.50% |
| 2015 | $17.98 Billion | -- |
End of Day Market Cap According to Different Sources
On Oct 30th, 2026 the market cap of Aon PLC was reported to be:
| Source | Market Cap |
|---|---|
| Yahoo Finance | $68.23 Billion USD |
| MoneyControl | $68.23 Billion USD |
| MarketWatch | $68.23 Billion USD |
| marketcap.company | $68.23 Billion USD |
| Reuters | $68.23 Billion USD |
Market cap values may vary slightly between sources due to differences in calculation methods, timing, and data refresh rates.
About Aon PLC
Aon plc operates as a professional services firm in the United States, rest of the Americas, the United Kingdom, Ireland, rest of Europe, the Middle East, Africa, and the Asia Pacific. It operates through Risk Capital and Human Capital segments. The company offers commercial risk solutions comprising retail and insurance brokerage, specialty solutions, global risk consulting, captives management,… Read more