VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, December 31, 2025

Stock Comparison

Aon plc vs Thomson Reuters 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

Thomson Reuters Corporation

TRI · Toronto Stock Exchange

Market cap (USD)
SectorIndustrials
CountryCA
Data as of2025-12-30
Moat score
84/ 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 Thomson Reuters Corporation's moat claims, evidence, and risks.

View TRI analysis

Comparison highlights

  • Moat score gap: Thomson Reuters Corporation leads (84 / 100 vs 70 / 100 for Aon plc).
  • Segment focus: Aon plc has 2 segments (67% in Risk Capital); Thomson Reuters Corporation has 5 segments (40.1% in Legal Professionals).
  • Primary market structure: Oligopoly vs Duopoly. Pricing power: Moderate vs Strong.
  • Moat breadth: Aon plc has 6 moat types across 3 domains; Thomson Reuters Corporation has 4 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%

Thomson Reuters Corporation

Legal Professionals

Market

Legal research and legal workflow software

Geography

Global

Customer

Law firms, corporate legal departments, and governments

Role

Subscription software + proprietary legal content

Revenue share

40.1%

Side-by-side metrics

Aon plc
Thomson Reuters Corporation
Ticker / Exchange
AON - New York Stock Exchange
TRI - Toronto Stock Exchange
Market cap (USD)
$76.6B
n/a
Sector
Financials
Industrials
HQ country
IE
CA
Primary segment
Risk Capital
Legal Professionals
Market structure
Oligopoly
Duopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Strong
Moat score
70 / 100
84 / 100
Moat domains
Demand, Supply, Legal
Demand, Legal, Supply
Last update
2025-12-31
2025-12-30

Moat coverage

Shared moat types

Data Workflow LockinBrand TrustScale Economies Unit Cost

Aon plc strengths

Switching Costs GeneralService Field NetworkCompliance Advantage

Thomson Reuters Corporation strengths

Regulated Standards Pipe

Segment mix

Aon plc segments

Full profile >

Risk Capital

Oligopoly

67%

Human Capital

Oligopoly

33.2%

Thomson Reuters Corporation segments

Full profile >

Legal Professionals

Duopoly

40.1%

Corporates

Oligopoly

25.3%

Tax & Accounting Professionals

Oligopoly

16%

Reuters News

Oligopoly

11.4%

Global Print

Competitive

7.1%

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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.