WTW vs. AON

Last updated Apr 2, 2026

Compare and contrast key facts about Willis Towers Watson Public Limited Company (WTW) and Aon plc (AON).

Performance

WTW vs. AON - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Willis Towers Watson Public Limited Company (WTW) and Aon plc (AON). The values are adjusted to include any dividend payments, if applicable.

WTW vs. AON - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WTW Willis Towers Watson Public Limited Company	-12.21%	6.09%	31.48%	0.08%	4.53%	14.16%	5.83%	34.81%	2.42%	25.05%
AON Aon plc	-8.74%	-0.94%	24.45%	-2.31%	0.61%	43.39%	2.37%	44.68%	9.94%	21.49%

Fundamentals

Market Cap WTW : $27.89B AON : $69.57B
EPS WTW : $16.21 AON : $17.04
PE Ratio WTW : 17.74 AON : 18.86
PEG Ratio WTW : 0.55 AON : 0.48
PS Ratio WTW : 2.93 AON : 4.06
PB Ratio WTW : 3.50 AON : 7.44
Total Revenue (TTM) WTW : $9.71B AON : $17.18B
Gross Profit (TTM) WTW : $2.59B AON : $8.20B
EBITDA (TTM) WTW : $2.53B AON : $5.12B

Returns By Period

In the year-to-date period, WTW achieves a -12.21% return, which is significantly lower than AON's -8.74% return. Over the past 10 years, WTW has underperformed AON with an annualized return of 10.67%, while AON has yielded a comparatively higher 12.91% annualized return.

WTW

• 1D: -1.09%
• 1M: -5.14%
• YTD: -12.21%
• 6M: -15.93%
• 1Y: -13.67%
• 3Y*: 8.73%
• 5Y*: 5.63%
• 10Y*: 10.67%

AON

• 1D: -0.45%
• 1M: -4.87%
• YTD: -8.74%
• 6M: -10.38%
• 1Y: -18.74%
• 3Y*: 1.46%
• 5Y*: 7.60%
• 10Y*: 12.91%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Return for Risk

WTW vs. AON — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

WTW

WTW Risk / Return Rank: 15
WTW Sharpe Ratio Rank: 17
WTW Sortino Ratio Rank: 18
WTW Omega Ratio Rank: 17
WTW Calmar Ratio Rank: 16
WTW Martin Ratio Rank: 8

AON

AON Risk / Return Rank: 10
AON Sharpe Ratio Rank: 10
AON Sortino Ratio Rank: 12
AON Omega Ratio Rank: 12
AON Calmar Ratio Rank: 8
AON Martin Ratio Rank: 8

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

WTW vs. AON - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Willis Towers Watson Public Limited Company (WTW) and Aon plc (AON). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	WTW	AON	Difference
Sharpe ratio Return per unit of total volatility	-0.53	-0.74	+0.21
Sortino ratio Return per unit of downside risk	-0.56	-0.88	+0.31
Omega ratio Gain probability vs. loss probability	0.92	0.88	+0.04
Calmar ratio Return relative to maximum drawdown	-0.70	-0.87	+0.16
Martin ratio Return relative to average drawdown	-1.55	-1.55	0.00
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WTW vs. AON - Sharpe Ratio Comparison

The current WTW Sharpe Ratio is -0.53, which is comparable to the AON Sharpe Ratio of -0.74. The chart below compares the historical Sharpe Ratios of WTW and AON, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	WTW	AON	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.53	-0.74	+0.21
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.24	0.33	-0.09
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.44	0.56	-0.11
Sharpe Ratio (All Time) Calculated using the full available price history	0.41	0.42	-0.01

Correlation

The correlation between WTW and AON is 0.71, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

WTW vs. AON - Dividend Comparison

WTW's dividend yield for the trailing twelve months is around 1.29%, more than AON's 0.93% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
WTW Willis Towers Watson Public Limited Company	1.29%	1.12%	1.12%	1.39%	1.34%	1.27%	1.31%	1.29%	1.58%	1.41%	1.57%	0.00%
AON Aon plc	0.93%	0.82%	0.74%	0.83%	0.73%	0.66%	0.84%	0.83%	1.35%	1.05%	1.16%	1.25%

Drawdowns

WTW vs. AON - Drawdown Comparison

The maximum WTW drawdown since its inception was -32.95%, smaller than the maximum AON drawdown of -69.05%. Use the drawdown chart below to compare losses from any high point for WTW and AON.

Drawdown Indicators

	WTW	AON	Difference
Max Drawdown Largest peak-to-trough decline	-32.95%	-69.05%	+36.10%
Max Drawdown (1Y) Largest decline over 1 year	-19.74%	-21.06%	+1.32%
Max Drawdown (5Y) Largest decline over 5 years	-28.42%	-25.38%	-3.04%
Max Drawdown (10Y) Largest decline over 10 years	-32.95%	-38.73%	+5.78%
Current Drawdown Current decline from peak	-17.33%	-20.82%	+3.49%
Average Drawdown Average peak-to-trough decline	-7.46%	-13.64%	+6.18%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.98%	12.12%	-3.14%

Volatility

WTW vs. AON - Volatility Comparison

The current volatility for Willis Towers Watson Public Limited Company (WTW) is 5.86%, while Aon plc (AON) has a volatility of 8.05%. This indicates that WTW experiences smaller price fluctuations and is considered to be less risky than AON based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WTW	AON	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.86%	8.05%	-2.19%
Volatility (6M) Calculated over the trailing 6-month period	20.23%	18.23%	+2.00%
Volatility (1Y) Calculated over the trailing 1-year period	25.67%	25.36%	+0.31%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.21%	22.89%	+0.32%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.18%	23.27%	+0.91%

Financials

WTW vs. AON - Profitability Comparison

The chart below illustrates the profitability comparison between Willis Towers Watson Public Limited Company and Aon plc over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

WTW - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Willis Towers Watson Public Limited Company reported a gross profit of 0.00 and revenue of 2.94B. Therefore, the gross margin over that period was 0.0%.

AON - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Aon plc reported a gross profit of 2.18B and revenue of 4.30B. Therefore, the gross margin over that period was 50.8%.

WTW - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Willis Towers Watson Public Limited Company reported an operating income of 1.02B and revenue of 2.94B, resulting in an operating margin of 34.6%.

AON - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Aon plc reported an operating income of 1.21B and revenue of 4.30B, resulting in an operating margin of 28.1%.

WTW - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Willis Towers Watson Public Limited Company reported a net income of 735.00M and revenue of 2.94B, resulting in a net margin of 25.0%.

AON - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Aon plc reported a net income of 1.69B and revenue of 4.30B, resulting in a net margin of 39.4%.