Aon PLC (AON)vsMarsh & McLennan Companies, Inc. (MRSH)
AON
Aon PLC
$320.75
+1.95%
FINANCIAL SERVICES · Cap: $70.38B
MRSH
Marsh & McLennan Companies, Inc.
$160.12
+2.59%
FINANCIAL SERVICES · Cap: $78.25B
Smart Verdict
WallStSmart Research — data-driven comparison
Marsh & McLennan Companies, Inc. generates 57% more annual revenue ($27.52B vs $17.49B). AON leads profitability with a 22.5% profit margin vs 14.3%. MRSH appears more attractively valued with a PEG of 1.57. AON earns a higher WallStSmart Score of 68/100 (B-).
AON
Strong Buy68
out of 100
Grade: B-
MRSH
Buy58
out of 100
Grade: C
Key Strengths & Concerns
Side-by-side fundamental analysis
Key Strengths
Every $100 of equity generates 40 in profit
Strong operational efficiency at 35.8%
Large-cap with strong market position
Keeps 23 of every $100 in revenue as profit
Earnings expanding 27.1% YoY
Large-cap with strong market position
Every $100 of equity generates 27 in profit
Strong operational efficiency at 24.3%
Areas to Watch
Elevated debt levels
Expensive relative to growth rate
Distress zone — elevated risk
Expensive relative to growth rate
Distress zone — elevated risk
Elevated debt levels
Earnings declined 15.4%
Comparative Analysis Report
WallStSmart ResearchBull Case : AON
The strongest argument for AON centers on Return on Equity, Operating Margin, Market Cap. Profitability is solid with margins at 22.5% and operating margin at 35.8%.
Bull Case : MRSH
The strongest argument for MRSH centers on Market Cap, Return on Equity, Operating Margin.
Bear Case : AON
The primary concerns for AON are Debt/Equity, PEG Ratio, Altman Z-Score. Debt-to-equity of 1.57 is elevated, increasing financial risk.
Bear Case : MRSH
The primary concerns for MRSH are PEG Ratio, Altman Z-Score, Debt/Equity. Debt-to-equity of 1.54 is elevated, increasing financial risk.
Key Dynamics to Monitor
AON profiles as a mature stock while MRSH is a value play — different risk/reward profiles.
AON carries more volatility with a beta of 0.71 — expect wider price swings.
MRSH is growing revenue faster at 7.6% — sustainability is the question.
AON generates stronger free cash flow (363M), providing more financial flexibility.
Bottom Line
AON scores higher overall (68/100 vs 58/100), backed by strong 22.5% margins. Both earn "Strong Buy" and "Buy" ratings respectively — the choice depends on your investment horizon and risk tolerance.
This analysis is generated from publicly available financial data. Not financial advice.
Aon PLC
FINANCIAL SERVICES · INSURANCE BROKERS · USA
Aon plc is a multinational professional services firm that sells a range of financial risk-mitigation products, including insurance, pension administration, and health-insurance plans.
Marsh & McLennan Companies, Inc.
FINANCIAL SERVICES · INSURANCE BROKERS · USA
Marsh & McLennan Companies, Inc., a professional services company, provides advisory services and insurance solutions to clients in the areas of risk, strategy, and people globally. The company is headquartered in New York, New York.
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