VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, December 31, 2025

Stock Comparison

Thales S.A. vs Marsh & McLennan Companies, Inc.

Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.

Thales S.A.

HO · Euronext Paris

Market cap (USD)$55.3B
SectorIndustrials
CountryFR
Data as of2025-12-28
Moat score
73/ 100

Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.

Full stock profile

Dive deeper into Thales S.A.'s moat claims, evidence, and risks.

View HO analysis

Marsh & McLennan Companies, Inc.

MMC · New York Stock Exchange

Market cap (USD)
SectorFinancials
CountryUS
Data as of2025-12-31
Moat score
65/ 100

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 analysis

Comparison highlights

  • Moat score gap: Thales S.A. leads (73 / 100 vs 65 / 100 for Marsh & McLennan Companies, Inc.).
  • Segment focus: Thales S.A. has 3 segments (53.3% in Defence); Marsh & McLennan Companies, Inc. has 2 segments (62.8% in Risk and Insurance Services).
  • Moat breadth: Thales S.A. has 8 moat types across 3 domains; Marsh & McLennan Companies, Inc. has 5 across 3.

Primary market context

Thales S.A.

Defence

Market

Defense electronics, secure communications, and mission systems

Geography

Global

Customer

Government / defence ministries, armed forces, security forces

Role

Prime contractor and system integrator; OEM of defence electronics

Revenue share

53.3%

Marsh & McLennan Companies, Inc.

Risk and Insurance Services

Market

Insurance brokerage, risk advisory, and reinsurance brokerage/services

Geography

Global

Customer

Enterprises, public entities, associations, and individuals (via broker/agent channels)

Role

Intermediary + advisor (insurance/reinsurance market intermediary)

Revenue share

62.8%

Side-by-side metrics

Thales S.A.
Marsh & McLennan Companies, Inc.
Ticker / Exchange
HO - Euronext Paris
MMC - New York Stock Exchange
Market cap (USD)
$55.3B
n/a
Sector
Industrials
Financials
HQ country
FR
US
Primary segment
Defence
Risk and Insurance Services
Market structure
Oligopoly
Oligopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
73 / 100
65 / 100
Moat domains
Legal, Demand, Supply
Supply, Demand, Legal
Last update
2025-12-28
2025-12-31

Moat coverage

Shared moat types

Service Field NetworkBrand Trust

Thales S.A. strengths

Government Contracting RelationshipsLong Term ContractsDesign In QualificationRegulated Standards PipeSuite BundlingCapex Knowhow Scale

Marsh & McLennan Companies, Inc. strengths

Switching Costs GeneralCompliance AdvantageData Workflow Lockin

Segment mix

Thales S.A. segments

Full profile >

Defence

Oligopoly

53.3%

Aerospace

Oligopoly

26.6%

Cyber & Digital

Competitive

19.6%

Marsh & McLennan Companies, Inc. segments

Full profile >

Risk and Insurance Services

Oligopoly

62.8%

Consulting

Competitive

37.2%

Want the full wide moat stocks list?

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Curation & 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.