VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Friday, January 2, 2026

Stock Comparison

Aon plc vs TC Energy 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)$75.2B
Gross margin (TTM)43.7%
Operating margin (TTM)24.8%
Net margin (TTM)16%
SectorFinancials
IndustryInsurance - Brokers
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

TC Energy Corporation

TRP · New York Stock Exchange

Market cap (USD)$37B
Gross margin (TTM)
Operating margin (TTM)
Net margin (TTM)
SectorEnergy
Industry
CountryCA
Data as of2026-01-02
Moat score
80/ 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 TC Energy Corporation's moat claims, evidence, and risks.

View TRP analysis

Comparison highlights

  • Moat score gap: TC Energy Corporation leads (80 / 100 vs 70 / 100 for Aon plc).
  • Segment focus: Aon plc has 2 segments (67% in Risk Capital); TC Energy Corporation has 4 segments (46.1% in U.S. Natural Gas Pipelines).
  • Primary market structure: Oligopoly vs Oligopoly. Pricing power: Moderate vs Weak.
  • Moat breadth: Aon plc has 6 moat types across 3 domains; TC Energy 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%

TC Energy Corporation

U.S. Natural Gas Pipelines

Market

U.S. interstate natural gas pipeline transportation (FERC-regulated)

Geography

United States

Customer

Utilities/LDCs, power generators, LNG/export facilities, industrial users and marketers (as shippers)

Role

Midstream pipeline operator

Revenue share

46.1%

Side-by-side metrics

Aon plc
TC Energy Corporation
Ticker / Exchange
AON - New York Stock Exchange
TRP - New York Stock Exchange
Market cap (USD)
$75.2B
$37B
Gross margin (TTM)
43.7%
n/a
Operating margin (TTM)
24.8%
n/a
Net margin (TTM)
16%
n/a
Sector
Financials
Energy
Industry
Insurance - Brokers
n/a
HQ country
IE
CA
Primary segment
Risk Capital
U.S. Natural Gas Pipelines
Market structure
Oligopoly
Oligopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Weak
Moat score
70 / 100
80 / 100
Moat domains
Demand, Supply, Legal
Legal, Demand, Supply
Last update
2025-12-31
2026-01-02

Moat coverage

Shared moat types

No overlap yet.

Aon plc strengths

Data Workflow LockinSwitching Costs GeneralService Field NetworkBrand TrustCompliance AdvantageScale Economies Unit Cost

TC Energy Corporation strengths

Regulated Standards PipeLong Term ContractsPhysical Network DensityGovernment Contracting Relationships

Segment mix

Aon plc segments

Full profile >

Risk Capital

Oligopoly

67%

Human Capital

Oligopoly

33.2%

TC Energy Corporation segments

Full profile >

Canadian Natural Gas Pipelines

Quasi-Monopoly

40.7%

U.S. Natural Gas Pipelines

Oligopoly

46.1%

Mexico Natural Gas Pipelines

Oligopoly

6.3%

Power and Energy Solutions

Competitive

6.9%

Want the full wide moat stocks list?

Browse the full ranking of wide moat stocks, updated with moat scores and segment context.

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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.