VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Saturday, January 10, 2026

Stock Comparison

Arthur J. Gallagher & Co. vs James Hardie Industries plc

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

Arthur J. Gallagher & Co.

AJG · New York Stock Exchange

Market cap (USD)$67.9B
Gross margin (TTM)
Operating margin (TTM)
Net margin (TTM)
SectorFinancials
IndustryInsurance - Brokers
CountryUS
Data as of2026-01-09
Moat score
69/ 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 Arthur J. Gallagher & Co.'s moat claims, evidence, and risks.

View AJG analysis

James Hardie Industries plc

JHX · ASX

Market cap (USD)$18.8B
Gross margin (TTM)36.3%
Operating margin (TTM)13.6%
Net margin (TTM)4.7%
SectorMaterials
IndustryConstruction Materials
CountryIE
Data as of2025-12-28
Moat score
74/ 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 James Hardie Industries plc's moat claims, evidence, and risks.

View JHX analysis

Comparison highlights

  • Moat score gap: James Hardie Industries plc leads (74 / 100 vs 69 / 100 for Arthur J. Gallagher & Co.).
  • Segment focus: Arthur J. Gallagher & Co. has 2 segments (86% in Brokerage); James Hardie Industries plc has 4 segments (64.2% in Siding & Trim).
  • Primary market structure: Oligopoly vs Quasi-Monopoly. Pricing power: Moderate vs Moderate.
  • Moat breadth: Arthur J. Gallagher & Co. has 4 moat types across 2 domains; James Hardie Industries plc has 5 across 2.

Primary market context

Arthur J. Gallagher & Co.

Brokerage

Market

Insurance and reinsurance brokerage and consulting

Geography

Global

Customer

Commercial, industrial, public sector, nonprofit and other organizations; underwriting enterprises for reinsurance placements

Role

Intermediary / broker / advisor

Revenue share

86%

James Hardie Industries plc

Siding & Trim

Market

North American fiber cement exterior siding & trim (plus related exterior products)

Geography

North America (primarily U.S. and Canada)

Customer

Homebuilders, contractors, remodelers, dealers/distributors, and retailers

Role

Manufacturer / branded building-products supplier

Revenue share

64.2%

Side-by-side metrics

Arthur J. Gallagher & Co.
James Hardie Industries plc
Ticker / Exchange
AJG - New York Stock Exchange
JHX - ASX
Market cap (USD)
$67.9B
$18.8B
Gross margin (TTM)
n/a
36.3%
Operating margin (TTM)
n/a
13.6%
Net margin (TTM)
n/a
4.7%
Sector
Financials
Materials
Industry
Insurance - Brokers
Construction Materials
HQ country
US
IE
Primary segment
Brokerage
Siding & Trim
Market structure
Oligopoly
Quasi-Monopoly
Market share
n/a
88%-92% (estimated)
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
69 / 100
74 / 100
Moat domains
Supply, Demand
Supply, Demand
Last update
2026-01-09
2025-12-28

Moat coverage

Shared moat types

Brand TrustOperational Excellence

Arthur J. Gallagher & Co. strengths

Service Field NetworkData Workflow Lockin

James Hardie Industries plc strengths

Capex Knowhow ScaleLong Term ContractsDistribution Control

Segment mix

Arthur J. Gallagher & Co. segments

Full profile >

Brokerage

Oligopoly

86%

Risk Management

Competitive

14%

James Hardie Industries plc segments

Full profile >

Siding & Trim

Quasi-Monopoly

64.2%

Deck, Rail & Accessories

Oligopoly

11.7%

Australia & New Zealand

Oligopoly

11.6%

Europe

Competitive

12.5%

Want the full wide moat stocks list?

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Proven models entering the expansion stage with unit economics that work.

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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.