VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, January 7, 2026

Stock Comparison

Auckland International Airport Limited vs ResMed Inc.

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

Auckland International Airport Limited

AIA · NZX

Market cap (USD)$14.3B
Gross margin (TTM)54.4%
Operating margin (TTM)55%
Net margin (TTM)23.3%
SectorIndustrials
IndustryAirlines, Airports & Air Services
CountryNZ
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 Auckland International Airport Limited's moat claims, evidence, and risks.

View AIA 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 74 / 100 for Auckland International Airport Limited).
  • Segment focus: Auckland International Airport Limited has 3 segments; ResMed Inc. has 2 segments (87.5% in Sleep and Breathing Health).
  • Primary market structure: Monopoly vs Oligopoly. Pricing power: Moderate vs Moderate.
  • Moat breadth: Auckland International Airport Limited has 5 moat types across 3 domains; ResMed Inc. has 7 across 2.

Primary market context

Auckland International Airport Limited

Aeronautical (regulated airport services)

Market

Aeronautical airport services at Auckland Airport (airfield landing/parking, passenger terminal and related charges)

Geography

New Zealand (Auckland catchment)

Customer

Airlines and aviation operators (direct customers); passengers indirectly

Role

Airport infrastructure operator

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

Auckland International Airport Limited
ResMed Inc.
Ticker / Exchange
AIA - NZX
RMD - New York Stock Exchange
Market cap (USD)
$14.3B
$36B
Gross margin (TTM)
54.4%
60.1%
Operating margin (TTM)
55%
33.2%
Net margin (TTM)
23.3%
27.4%
Sector
Industrials
Healthcare
Industry
Airlines, Airports & Air Services
Medical - Instruments & Supplies
HQ country
NZ
US
Primary segment
Aeronautical (regulated airport services)
Sleep and Breathing Health
Market structure
Monopoly
Oligopoly
Market share
n/a
58%-66% (estimated)
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
74 / 100
76 / 100
Moat domains
Legal, Supply, Demand
Demand, Legal
Last update
2025-12-28
2026-01-04

Moat coverage

Shared moat types

Long Term Contracts

Auckland International Airport Limited strengths

Permits Rights Of WayCapacity MoatDistribution ControlGeographic Natural

ResMed Inc. strengths

Installed Base ConsumablesData Workflow LockinBrand TrustCompliance AdvantageIP Choke PointTraining Org Change Costs

Segment mix

Auckland International Airport Limited segments

Full profile >

Aeronautical (regulated airport services)

Monopoly

n/a

Retail concessions and car parking

Quasi-Monopoly

n/a

Commercial property and precinct development

Competitive

n/a

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?

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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.