VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, December 31, 2025

Stock Comparison

Aon plc vs Northrop Grumman Corporation

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

Aon plc

AON · New York Stock Exchange

Market cap (USD)$76.6B
SectorFinancials
CountryIE
Data as of2025-12-31
Moat score
70/ 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 Aon plc's moat claims, evidence, and risks.

View AON analysis

Northrop Grumman Corporation

NOC · New York Stock Exchange

Market cap (USD)$83.1B
SectorIndustrials
CountryUS
Data as of2025-12-26
Moat score
72/ 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 Northrop Grumman Corporation's moat claims, evidence, and risks.

View NOC analysis

Comparison highlights

  • Moat score gap: Northrop Grumman Corporation leads (72 / 100 vs 70 / 100 for Aon plc).
  • Segment focus: Aon plc has 2 segments (67% in Risk Capital); Northrop Grumman Corporation has 4 segments (28.7% in Aeronautics Systems).
  • Moat breadth: Aon plc has 6 moat types across 3 domains; Northrop Grumman Corporation has 6 across 3.

Primary market context

Aon plc

Risk Capital

Market

Large-account commercial insurance & reinsurance brokerage and risk advisory

Geography

Global

Customer

Enterprises, insurers, reinsurers

Role

Intermediary/advisor

Revenue share

67%

Northrop Grumman Corporation

Aeronautics Systems

Market

Military aircraft systems (manned & unmanned) plus sustainment/modernization

Geography

Global (primarily United States and allies)

Customer

U.S. government and allied governments

Role

Prime contractor and major subsystem supplier

Revenue share

28.7%

Side-by-side metrics

Aon plc
Northrop Grumman Corporation
Ticker / Exchange
AON - New York Stock Exchange
NOC - New York Stock Exchange
Market cap (USD)
$76.6B
$83.1B
Sector
Financials
Industrials
HQ country
IE
US
Primary segment
Risk Capital
Aeronautics Systems
Market structure
Oligopoly
Oligopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
70 / 100
72 / 100
Moat domains
Demand, Supply, Legal
Legal, Demand, Supply
Last update
2025-12-31
2025-12-26

Moat coverage

Shared moat types

Switching Costs GeneralCompliance Advantage

Aon plc strengths

Data Workflow LockinService Field NetworkBrand TrustScale Economies Unit Cost

Northrop Grumman Corporation strengths

Government Contracting RelationshipsDesign In QualificationCapacity MoatCapex Knowhow Scale

Segment mix

Aon plc segments

Full profile >

Risk Capital

Oligopoly

67%

Human Capital

Oligopoly

33.2%

Northrop Grumman Corporation segments

Full profile >

Aeronautics Systems

Oligopoly

28.7%

Defense Systems

Oligopoly

18.8%

Mission Systems

Oligopoly

24.9%

Space Systems

Oligopoly

27.6%

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.