VOL. XCIV, NO. 247
★ WIDE MOAT STOCKS COMPARISON ★
NO ADVICE
Wednesday, December 31, 2025
Stock Comparison
London Stock Exchange Group plc vs Marsh & McLennan Companies, Inc.
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
London Stock Exchange Group plc
LSEG · London Stock Exchange
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into London Stock Exchange Group plc's moat claims, evidence, and risks.
View LSEG analysisMarsh & McLennan Companies, Inc.
MMC · New York Stock Exchange
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into Marsh & McLennan Companies, Inc.'s moat claims, evidence, and risks.
View MMC analysisComparison highlights
- Moat score gap: London Stock Exchange Group plc leads (74 / 100 vs 65 / 100 for Marsh & McLennan Companies, Inc.).
- Segment focus: London Stock Exchange Group plc has 5 segments (51% in Data & Analytics); Marsh & McLennan Companies, Inc. has 2 segments (62.8% in Risk and Insurance Services).
- Moat breadth: London Stock Exchange Group plc has 8 moat types across 4 domains; Marsh & McLennan Companies, Inc. has 5 across 3.
Primary market context
London Stock Exchange Group plc
Data & Analytics
Financial market data, analytics and workflows (terminals and enterprise feeds)
Global
Financial institutions and corporates
Data & analytics vendor
51%
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)
62.8%
Side-by-side metrics
Moat coverage
Shared moat types
London Stock Exchange Group plc strengths
Marsh & McLennan Companies, Inc. strengths
Segment mix
London Stock Exchange Group plc segments
Full profile >Data & Analytics
Oligopoly
FTSE Russell
Oligopoly
Risk Intelligence
Oligopoly
Capital Markets
Oligopoly
Post Trade
Quasi-Monopoly
Marsh & McLennan Companies, Inc. segments
Full profile >Risk and Insurance Services
Oligopoly
Consulting
Competitive
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View the moat stocks listCuration & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.