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Side-by-side financial comparison of Aon plc (AON) and Halliburton (HAL). Click either name above to swap in a different company.

Halliburton is the larger business by last-quarter revenue ($5.4B vs $4.3B, roughly 1.3× Aon plc). Aon plc runs the higher net margin — 39.4% vs 8.6%, a 30.8% gap on every dollar of revenue. On growth, Aon plc posted the faster year-over-year revenue change (3.7% vs -4.5%). Aon plc produced more free cash flow last quarter ($1.3B vs $123.0M). Over the past eight quarters, Aon plc's revenue compounded faster (2.8% CAGR vs -3.8%).

Aon plc is a British-American professional services firm. The company operates two divisions: Risk Capital, which provides brokerage and consulting services for risk management and insurance and reinsurance, and Human Capital, which provides services for health insurance, retirement plans, pension plans, and talent advisory.

Halliburton Company is an American multinational corporation and the world's second-largest oil service company, responsible for most of the world's fracking operations. The company, incorporated in the United States, has dual headquarters located in Houston and in Dubai.

AON vs HAL — Head-to-Head

Bigger by revenue
HAL
HAL
1.3× larger
HAL
$5.4B
$4.3B
AON
Growing faster (revenue YoY)
AON
AON
+8.2% gap
AON
3.7%
-4.5%
HAL
Higher net margin
AON
AON
30.8% more per $
AON
39.4%
8.6%
HAL
More free cash flow
AON
AON
$1.2B more FCF
AON
$1.3B
$123.0M
HAL
Faster 2-yr revenue CAGR
AON
AON
Annualised
AON
2.8%
-3.8%
HAL

Income Statement — Q4 FY2025 vs Q1 FY2026

Metric
AON
AON
HAL
HAL
Revenue
$4.3B
$5.4B
Net Profit
$1.7B
$464.0M
Gross Margin
Operating Margin
28.1%
12.6%
Net Margin
39.4%
8.6%
Revenue YoY
3.7%
-4.5%
Net Profit YoY
136.5%
-21.2%
EPS (diluted)
$7.82
$0.55

Green = leading value per metric. Periods may differ when fiscal calendars don't align.

8-Quarter Revenue & Profit Trend

Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.

Revenue
AON
AON
HAL
HAL
Q1 26
$5.4B
Q4 25
$4.3B
$5.7B
Q3 25
$4.0B
$5.6B
Q2 25
$4.2B
$5.5B
Q1 25
$4.7B
$5.4B
Q4 24
$4.1B
$5.6B
Q3 24
$3.7B
$5.7B
Q2 24
$3.8B
$5.8B
Net Profit
AON
AON
HAL
HAL
Q1 26
$464.0M
Q4 25
$1.7B
$589.0M
Q3 25
$458.0M
$18.0M
Q2 25
$579.0M
$472.0M
Q1 25
$965.0M
$204.0M
Q4 24
$716.0M
$615.0M
Q3 24
$343.0M
$571.0M
Q2 24
$524.0M
$709.0M
Operating Margin
AON
AON
HAL
HAL
Q1 26
12.6%
Q4 25
28.1%
13.2%
Q3 25
20.4%
6.4%
Q2 25
20.7%
13.2%
Q1 25
30.9%
8.0%
Q4 24
26.3%
16.6%
Q3 24
16.7%
15.3%
Q2 24
17.4%
17.7%
Net Margin
AON
AON
HAL
HAL
Q1 26
8.6%
Q4 25
39.4%
10.4%
Q3 25
11.5%
0.3%
Q2 25
13.9%
8.6%
Q1 25
20.4%
3.8%
Q4 24
17.3%
11.0%
Q3 24
9.2%
10.0%
Q2 24
13.9%
12.2%
EPS (diluted)
AON
AON
HAL
HAL
Q1 26
$0.55
Q4 25
$7.82
Q3 25
$2.11
$0.02
Q2 25
$2.66
$0.55
Q1 25
$4.43
$0.24
Q4 24
$3.11
Q3 24
$1.57
$650000.00
Q2 24
$2.46
$800000.00

Balance Sheet & Financial Strength

Snapshot of each company's liquidity, leverage and book value from the latest quarter.

Metric
AON
AON
HAL
HAL
Cash + ST InvestmentsLiquidity on hand
$2.8B
$2.0M
Total DebtLower is stronger
$15.2B
$7.2M
Stockholders' EquityBook value
$9.4B
$10.8M
Total Assets
$50.8B
$25.1M
Debt / EquityLower = less leverage
1.63×
0.66×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
AON
AON
HAL
HAL
Q1 26
$2.0M
Q4 25
$2.8B
$2.2B
Q3 25
$1.3B
$2.0B
Q2 25
$1.4B
Q1 25
$1.3B
Q4 24
$1.3B
$2.6B
Q3 24
$1.3B
Q2 24
$1.2B
Total Debt
AON
AON
HAL
HAL
Q1 26
$7.2M
Q4 25
$15.2B
$7.2B
Q3 25
$7.2B
Q2 25
$7.2B
Q1 25
$7.2B
Q4 24
$17.0B
$7.2B
Q3 24
$7.6B
Q2 24
$7.6B
Stockholders' Equity
AON
AON
HAL
HAL
Q1 26
$10.8M
Q4 25
$9.4B
$10.5B
Q3 25
$7.9B
$10.2B
Q2 25
$7.8B
$10.5B
Q1 25
$7.0B
$10.4B
Q4 24
$6.1B
$10.5B
Q3 24
$6.2B
$10.3B
Q2 24
$5.9B
$10.0B
Total Assets
AON
AON
HAL
HAL
Q1 26
$25.1M
Q4 25
$50.8B
$25.0B
Q3 25
$51.6B
$25.2B
Q2 25
$54.0B
$25.4B
Q1 25
$50.3B
$25.2B
Q4 24
$49.0B
$25.6B
Q3 24
$49.9B
$25.3B
Q2 24
$51.5B
$25.2B
Debt / Equity
AON
AON
HAL
HAL
Q1 26
0.66×
Q4 25
1.63×
0.68×
Q3 25
0.70×
Q2 25
0.68×
Q1 25
0.69×
Q4 24
2.78×
0.68×
Q3 24
0.74×
Q2 24
0.76×

Cash Flow & Capital Efficiency

How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.

Metric
AON
AON
HAL
HAL
Operating Cash FlowLast quarter
$1.4B
Free Cash FlowOCF − Capex
$1.3B
$123.0M
FCF MarginFCF / Revenue
30.8%
2.3%
Capex IntensityCapex / Revenue
1.7%
3.6%
Cash ConversionOCF / Net Profit
0.83×
TTM Free Cash FlowTrailing 4 quarters
$3.2B
$1.7B

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
AON
AON
HAL
HAL
Q1 26
Q4 25
$1.4B
$1.2B
Q3 25
$1.1B
$488.0M
Q2 25
$796.0M
$896.0M
Q1 25
$140.0M
$377.0M
Q4 24
$1.2B
$1.5B
Q3 24
$1.0B
$841.0M
Q2 24
$513.0M
$1.1B
Free Cash Flow
AON
AON
HAL
HAL
Q1 26
$123.0M
Q4 25
$1.3B
$828.0M
Q3 25
$1.1B
$227.0M
Q2 25
$732.0M
$542.0M
Q1 25
$84.0M
$75.0M
Q4 24
$1.1B
$1.0B
Q3 24
$951.0M
$502.0M
Q2 24
$460.0M
$734.0M
FCF Margin
AON
AON
HAL
HAL
Q1 26
2.3%
Q4 25
30.8%
14.6%
Q3 25
27.0%
4.1%
Q2 25
17.6%
9.8%
Q1 25
1.8%
1.4%
Q4 24
27.6%
18.4%
Q3 24
25.6%
8.8%
Q2 24
12.2%
12.6%
Capex Intensity
AON
AON
HAL
HAL
Q1 26
3.6%
Q4 25
1.7%
6.0%
Q3 25
1.7%
4.7%
Q2 25
1.5%
6.4%
Q1 25
1.2%
5.6%
Q4 24
1.3%
7.6%
Q3 24
1.7%
6.0%
Q2 24
1.4%
5.9%
Cash Conversion
AON
AON
HAL
HAL
Q1 26
Q4 25
0.83×
1.98×
Q3 25
2.51×
27.11×
Q2 25
1.37×
1.90×
Q1 25
0.15×
1.85×
Q4 24
1.68×
2.37×
Q3 24
2.95×
1.47×
Q2 24
0.98×
1.52×

Financial Flow Comparison

Revenue → gross profit → operating profit → net profit for each company.

Revenue Breakdown by Segment

AON
AON

Commercial Risk Solutions$2.3B54%
Health Solutions$1.1B26%
Wealth Solutions$490.0M11%
Reinsurance Solutions$379.0M9%

HAL
HAL

Completion and Production$3.0B56%
Middle East/Asia$1.3B24%
Europe/Africa/CIS$858.0M16%
Other$210.0M4%

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