VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Friday, January 2, 2026

Stock Comparison

Aon plc vs Crown Castle Inc.

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

Crown Castle Inc.

CCI · New York Stock Exchange

Market cap (USD)$38.7B
Gross margin (TTM)
Operating margin (TTM)
Net margin (TTM)
SectorReal Estate
Industry
CountryUS
Data as of2026-01-02
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 Crown Castle Inc.'s moat claims, evidence, and risks.

View CCI analysis

Comparison highlights

  • Moat score gap: Crown Castle Inc. leads (84 / 100 vs 70 / 100 for Aon plc).
  • Segment focus: Aon plc has 2 segments (67% in Risk Capital); Crown Castle Inc. has 2 segments (67% in Towers).
  • Primary market structure: Oligopoly vs Oligopoly. Pricing power: Moderate vs Strong.
  • Moat breadth: Aon plc has 6 moat types across 3 domains; Crown Castle Inc. has 3 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%

Crown Castle Inc.

Towers

Market

U.S. macrocell tower leasing (wireless site rental)

Geography

United States

Customer

Mobile network operators

Role

Infrastructure owner/lessor

Revenue share

67%

Side-by-side metrics

Aon plc
Crown Castle Inc.
Ticker / Exchange
AON - New York Stock Exchange
CCI - New York Stock Exchange
Market cap (USD)
$75.2B
$38.7B
Gross margin (TTM)
43.7%
n/a
Operating margin (TTM)
24.8%
n/a
Net margin (TTM)
16%
n/a
Sector
Financials
Real Estate
Industry
Insurance - Brokers
n/a
HQ country
IE
US
Primary segment
Risk Capital
Towers
Market structure
Oligopoly
Oligopoly
Market share
n/a
16%-26% (implied)
HHI estimate
n/a
n/a
Pricing power
Moderate
Strong
Moat score
70 / 100
84 / 100
Moat domains
Demand, Supply, Legal
Supply, Legal, Demand
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

Crown Castle Inc. strengths

Physical Network DensityPermits Rights Of WayLong Term Contracts

Segment mix

Aon plc segments

Full profile >

Risk Capital

Oligopoly

67%

Human Capital

Oligopoly

33.2%

Crown Castle Inc. segments

Full profile >

Towers

Oligopoly

67%

Fiber (small cells + fiber solutions)

Competitive

33%

Want the full wide moat stocks list?

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

View the moat stocks list

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.