VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Thursday, January 8, 2026

Stock Comparison

AutoZone, Inc. vs ResMed Inc.

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

AutoZone, Inc.

AZO · New York Stock Exchange

Market cap (USD)$54.7B
Gross margin (TTM)52.2%
Operating margin (TTM)18.4%
Net margin (TTM)12.8%
SectorConsumer
IndustryAuto - Parts
CountryUS
Data as of2025-12-31
Moat score
59/ 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 AutoZone, Inc.'s moat claims, evidence, and risks.

View AZO analysis

ResMed Inc.

RMD · New York Stock Exchange

Market cap (USD)$36B
Gross margin (TTM)60.1%
Operating margin (TTM)33.2%
Net margin (TTM)27.4%
SectorHealthcare
IndustryMedical - Instruments & Supplies
CountryUS
Data as of2026-01-04
Moat score
76/ 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 ResMed Inc.'s moat claims, evidence, and risks.

View RMD analysis

Comparison highlights

  • Moat score gap: ResMed Inc. leads (76 / 100 vs 59 / 100 for AutoZone, Inc.).
  • Segment focus: AutoZone, Inc. has 2 segments (88% in U.S. Auto Parts Retail & Commercial Distribution); ResMed Inc. has 2 segments (87.5% in Sleep and Breathing Health).
  • Primary market structure: Competitive vs Oligopoly. Pricing power: Moderate vs Moderate.
  • Moat breadth: AutoZone, Inc. has 6 moat types across 3 domains; ResMed Inc. has 7 across 2.

Primary market context

AutoZone, Inc.

U.S. Auto Parts Retail & Commercial Distribution

Market

U.S. automotive aftermarket replacement parts & accessories retail and commercial distribution

Geography

United States

Customer

DIY consumers; professional repair shops (DIFM)

Role

Retailer and distributor

Revenue share

88%

ResMed Inc.

Sleep and Breathing Health

Market

Sleep apnea and respiratory care devices and related consumables (PAP, masks, ventilation) plus connected monitoring services

Geography

Global

Customer

DME/HME providers, sleep clinics, hospitals, patients

Role

Medical device OEM + connected care software/data services

Revenue share

87.5%

Side-by-side metrics

AutoZone, Inc.
ResMed Inc.
Ticker / Exchange
AZO - New York Stock Exchange
RMD - New York Stock Exchange
Market cap (USD)
$54.7B
$36B
Gross margin (TTM)
52.2%
60.1%
Operating margin (TTM)
18.4%
33.2%
Net margin (TTM)
12.8%
27.4%
Sector
Consumer
Healthcare
Industry
Auto - Parts
Medical - Instruments & Supplies
HQ country
US
US
Primary segment
U.S. Auto Parts Retail & Commercial Distribution
Sleep and Breathing Health
Market structure
Competitive
Oligopoly
Market share
n/a
58%-66% (estimated)
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
59 / 100
76 / 100
Moat domains
Supply, Demand, Financial
Demand, Legal
Last update
2025-12-31
2026-01-04

Moat coverage

Shared moat types

Brand Trust

AutoZone, Inc. strengths

Distribution ControlPhysical Network DensityService Field NetworkOperational ExcellenceNegative Working Capital

ResMed Inc. strengths

Installed Base ConsumablesData Workflow LockinCompliance AdvantageIP Choke PointLong Term ContractsTraining Org Change Costs

Segment mix

AutoZone, Inc. segments

Full profile >

U.S. Auto Parts Retail & Commercial Distribution

Competitive

88%

International Auto Parts Retail & Commercial Distribution (Mexico & Brazil)

Competitive

12%

ResMed Inc. segments

Full profile >

Sleep and Breathing Health

Oligopoly

87.5%

Residential Care Software

Competitive

12.5%

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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Looking for expansion-stage stocks?

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

View expansion-stage stocks

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.