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

Aon plc is the larger business by last-quarter revenue ($4.3B vs $4.0B, roughly 1.1× CELESTICA INC). Aon plc runs the higher net margin — 39.4% vs 5.2%, a 34.1% gap on every dollar of revenue. On growth, CELESTICA INC posted the faster year-over-year revenue change (52.8% vs 3.7%). Aon plc produced more free cash flow last quarter ($1.3B vs $137.9M). Over the past eight quarters, CELESTICA INC's revenue compounded faster (35.4% CAGR vs 2.8%).

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.

Celestica Inc. is a Canadian multinational design, manufacturing, hardware platform, and supply chain electronics manufacturing services (EMS) company, which is headquartered in Toronto, Ontario. The company operates in 50 sites across 15 countries.

AON vs CLS — Head-to-Head

Bigger by revenue
AON
AON
1.1× larger
AON
$4.3B
$4.0B
CLS
Growing faster (revenue YoY)
CLS
CLS
+49.1% gap
CLS
52.8%
3.7%
AON
Higher net margin
AON
AON
34.1% more per $
AON
39.4%
5.2%
CLS
More free cash flow
AON
AON
$1.2B more FCF
AON
$1.3B
$137.9M
CLS
Faster 2-yr revenue CAGR
CLS
CLS
Annualised
CLS
35.4%
2.8%
AON

Income Statement — Q4 FY2025 vs Q1 FY2026

Metric
AON
AON
CLS
CLS
Revenue
$4.3B
$4.0B
Net Profit
$1.7B
$212.3M
Gross Margin
10.8%
Operating Margin
28.1%
6723.5%
Net Margin
39.4%
5.2%
Revenue YoY
3.7%
52.8%
Net Profit YoY
136.5%
146.3%
EPS (diluted)
$7.82
$1.83

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
CLS
CLS
Q1 26
$4.0B
Q4 25
$4.3B
$3.7B
Q3 25
$4.0B
$3.2B
Q2 25
$4.2B
$2.9B
Q1 25
$4.7B
$2.6B
Q4 24
$4.1B
Q3 24
$3.7B
$2.5B
Q2 24
$3.8B
$2.4B
Net Profit
AON
AON
CLS
CLS
Q1 26
$212.3M
Q4 25
$1.7B
$267.5M
Q3 25
$458.0M
$267.8M
Q2 25
$579.0M
$211.0M
Q1 25
$965.0M
$86.2M
Q4 24
$716.0M
Q3 24
$343.0M
$89.5M
Q2 24
$524.0M
$95.0M
Gross Margin
AON
AON
CLS
CLS
Q1 26
10.8%
Q4 25
11.8%
Q3 25
13.0%
Q2 25
12.8%
Q1 25
10.3%
Q4 24
Q3 24
10.4%
Q2 24
10.6%
Operating Margin
AON
AON
CLS
CLS
Q1 26
6723.5%
Q4 25
28.1%
8.6%
Q3 25
20.4%
10.2%
Q2 25
20.7%
9.4%
Q1 25
30.9%
4.9%
Q4 24
26.3%
Q3 24
16.7%
5.5%
Q2 24
17.4%
5.6%
Net Margin
AON
AON
CLS
CLS
Q1 26
5.2%
Q4 25
39.4%
7.3%
Q3 25
11.5%
8.4%
Q2 25
13.9%
7.3%
Q1 25
20.4%
3.3%
Q4 24
17.3%
Q3 24
9.2%
3.6%
Q2 24
13.9%
4.0%
EPS (diluted)
AON
AON
CLS
CLS
Q1 26
$1.83
Q4 25
$7.82
$2.29
Q3 25
$2.11
$2.31
Q2 25
$2.66
$1.82
Q1 25
$4.43
$0.74
Q4 24
$3.11
Q3 24
$1.57
$0.75
Q2 24
$2.46
$0.80

Balance Sheet & Financial Strength

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

Metric
AON
AON
CLS
CLS
Cash + ST InvestmentsLiquidity on hand
$2.8B
$378.0M
Total DebtLower is stronger
$15.2B
Stockholders' EquityBook value
$9.4B
$2.1B
Total Assets
$50.8B
$8260.0B
Debt / EquityLower = less leverage
1.63×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
AON
AON
CLS
CLS
Q1 26
$378.0M
Q4 25
$2.8B
$595.6M
Q3 25
$1.3B
$305.9M
Q2 25
$1.4B
$313.8M
Q1 25
$1.3B
$303.0M
Q4 24
$1.3B
Q3 24
$1.3B
Q2 24
$1.2B
Total Debt
AON
AON
CLS
CLS
Q1 26
Q4 25
$15.2B
$750.5M
Q3 25
$756.7M
Q2 25
$848.6M
Q1 25
$915.0M
Q4 24
$17.0B
Q3 24
Q2 24
Stockholders' Equity
AON
AON
CLS
CLS
Q1 26
$2.1B
Q4 25
$9.4B
$2.2B
Q3 25
$7.9B
$2.0B
Q2 25
$7.8B
$1.8B
Q1 25
$7.0B
$1.6B
Q4 24
$6.1B
Q3 24
$6.2B
$1.8B
Q2 24
$5.9B
$1.8B
Total Assets
AON
AON
CLS
CLS
Q1 26
$8260.0B
Q4 25
$50.8B
$7.2B
Q3 25
$51.6B
$6.6B
Q2 25
$54.0B
$6.2B
Q1 25
$50.3B
$5.8B
Q4 24
$49.0B
Q3 24
$49.9B
Q2 24
$51.5B
Debt / Equity
AON
AON
CLS
CLS
Q1 26
Q4 25
1.63×
0.34×
Q3 25
0.37×
Q2 25
0.48×
Q1 25
0.59×
Q4 24
2.78×
Q3 24
Q2 24

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
CLS
CLS
Operating Cash FlowLast quarter
$1.4B
$356.3M
Free Cash FlowOCF − Capex
$1.3B
$137.9M
FCF MarginFCF / Revenue
30.8%
3.4%
Capex IntensityCapex / Revenue
1.7%
Cash ConversionOCF / Net Profit
0.83×
1.68×
TTM Free Cash FlowTrailing 4 quarters
$3.2B
$502.6M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
AON
AON
CLS
CLS
Q1 26
$356.3M
Q4 25
$1.4B
$250.6M
Q3 25
$1.1B
$126.2M
Q2 25
$796.0M
$152.4M
Q1 25
$140.0M
$130.3M
Q4 24
$1.2B
Q3 24
$1.0B
$122.8M
Q2 24
$513.0M
$99.6M
Free Cash Flow
AON
AON
CLS
CLS
Q1 26
$137.9M
Q4 25
$1.3B
$155.9M
Q3 25
$1.1B
$88.9M
Q2 25
$732.0M
$119.9M
Q1 25
$84.0M
$93.6M
Q4 24
$1.1B
Q3 24
$951.0M
$76.8M
Q2 24
$460.0M
$62.7M
FCF Margin
AON
AON
CLS
CLS
Q1 26
3.4%
Q4 25
30.8%
4.3%
Q3 25
27.0%
2.8%
Q2 25
17.6%
4.1%
Q1 25
1.8%
3.5%
Q4 24
27.6%
Q3 24
25.6%
3.1%
Q2 24
12.2%
2.6%
Capex Intensity
AON
AON
CLS
CLS
Q1 26
Q4 25
1.7%
2.6%
Q3 25
1.7%
1.2%
Q2 25
1.5%
1.1%
Q1 25
1.2%
1.4%
Q4 24
1.3%
Q3 24
1.7%
1.8%
Q2 24
1.4%
1.5%
Cash Conversion
AON
AON
CLS
CLS
Q1 26
1.68×
Q4 25
0.83×
0.94×
Q3 25
2.51×
0.47×
Q2 25
1.37×
0.72×
Q1 25
0.15×
1.51×
Q4 24
1.68×
Q3 24
2.95×
1.37×
Q2 24
0.98×
1.05×

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%

CLS
CLS

Segment breakdown not available.

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