Stock Comparison
Aon plc vs Marsh & McLennan Companies, Inc.
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
Aon plc
AON · New York Stock Exchange
Weighted across the company's segments.
Marsh & McLennan Companies, Inc.
MRSH · New York Stock Exchange
Weighted across the company's segments.
Full stock profile
Dive deeper into Marsh & McLennan Companies, Inc.'s moat claims, evidence, and risks.
View MRSH analysisComparison highlights
- Moat score gap: Marsh & McLennan Companies, Inc. leads (69 / 100 vs 65 / 100 for Aon plc).
- Segment focus: Aon plc has 2 segments (65.7% in Risk Capital); Marsh & McLennan Companies, Inc. has 2 segments (63.8% in Risk and Insurance Services).
- Moat breadth: Aon plc has 4 moat types across 2 domains; Marsh & McLennan Companies, Inc. has 3 across 2.
Primary market context
Aon plc
Risk Capital
Large-account commercial insurance & reinsurance brokerage and risk advisory
Global
Enterprises, insurers, reinsurers
Intermediary/advisor
65.7%
Marsh & McLennan Companies, Inc.
Risk and Insurance Services
Insurance brokerage, risk advisory, and reinsurance brokerage/services
Global
Enterprises, public entities, associations, and individuals (via broker/agent channels)
Intermediary + advisor (insurance/reinsurance market intermediary)
63.8%
Side-by-side metrics
Moat coverage
Shared moat types
Aon plc strengths
Marsh & McLennan Companies, Inc. strengths
No unique moat types yet.
Segment mix
Aon plc segments
Full profile >Risk Capital
Oligopoly
Human Capital
Oligopoly
Marsh & McLennan Companies, Inc. segments
Full profile >Risk and Insurance Services
Oligopoly
Consulting
Competitive
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