VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, December 31, 2025

Stock Comparison

BAE Systems plc vs Marsh & McLennan Companies, Inc.

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

BAE Systems plc

BA. · London Stock Exchange

Market cap (USD)
SectorIndustrials
CountryGB
Data as of2025-12-28
Moat score
75/ 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 BAE Systems plc's moat claims, evidence, and risks.

View BA. 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: BAE Systems plc leads (75 / 100 vs 65 / 100 for Marsh & McLennan Companies, Inc.).
  • Segment focus: BAE Systems plc has 5 segments (26.6% in Electronic Systems); Marsh & McLennan Companies, Inc. has 2 segments (62.8% in Risk and Insurance Services).
  • Moat breadth: BAE Systems plc has 8 moat types across 3 domains; Marsh & McLennan Companies, Inc. has 5 across 3.

Primary market context

BAE Systems plc

Electronic Systems

Market

Defence electronics (electronic warfare, avionics, C4ISR, space payloads and mission systems)

Geography

Primarily US and UK; global programmes

Customer

Government defence and intelligence agencies; prime contractors

Role

Subsystem OEM and prime contractor for electronics/mission systems

Revenue share

26.6%

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

BAE Systems plc
Marsh & McLennan Companies, Inc.
Ticker / Exchange
BA. - London Stock Exchange
MMC - New York Stock Exchange
Market cap (USD)
n/a
n/a
Sector
Industrials
Financials
HQ country
GB
US
Primary segment
Electronic Systems
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
75 / 100
65 / 100
Moat domains
Legal, Demand, Supply
Supply, Demand, Legal
Last update
2025-12-28
2025-12-31

Moat coverage

Shared moat types

Compliance AdvantageService Field NetworkSwitching Costs General

BAE Systems plc strengths

Government Contracting RelationshipsDesign In QualificationLong Term ContractsCapex Knowhow ScaleCapacity Moat

Marsh & McLennan Companies, Inc. strengths

Brand TrustData Workflow Lockin

Segment mix

BAE Systems plc segments

Full profile >

Electronic Systems

Oligopoly

26.6%

Platforms & Services

Oligopoly

16.3%

Air

Oligopoly

26%

Maritime

Oligopoly

22.5%

Cyber & Intelligence

Competitive

8.6%

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.