VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Saturday, January 10, 2026

Stock Comparison

Auckland International Airport Limited vs American Water Works Company, 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)$14.4B
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

American Water Works Company, Inc.

AWK · New York Stock Exchange

Market cap (USD)$25B
Gross margin (TTM)
Operating margin (TTM)
Net margin (TTM)
SectorUtilities
Industry
CountryUS
Data as of2026-01-09
Moat score
79/ 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 American Water Works Company, Inc.'s moat claims, evidence, and risks.

View AWK analysis

Comparison highlights

  • Moat score gap: American Water Works Company, Inc. leads (79 / 100 vs 74 / 100 for Auckland International Airport Limited).
  • Segment focus: Auckland International Airport Limited has 3 segments; American Water Works Company, Inc. has 2 segments (91.7% in Regulated Businesses).
  • Moat breadth: Auckland International Airport Limited has 5 moat types across 3 domains; American Water Works Company, Inc. has 8 across 3.

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

American Water Works Company, Inc.

Regulated Businesses

Market

Regulated water and wastewater utility service in certificated/franchised territories

Geography

United States (14-state footprint)

Customer

Residential, commercial, industrial, public authority, fire service, and sale-for-resale customers

Role

Regulated utility owner/operator (water & wastewater)

Revenue share

91.7%

Side-by-side metrics

Auckland International Airport Limited
American Water Works Company, Inc.
Ticker / Exchange
AIA - NZX
AWK - New York Stock Exchange
Market cap (USD)
$14.4B
$25B
Gross margin (TTM)
54.4%
n/a
Operating margin (TTM)
55%
n/a
Net margin (TTM)
23.3%
n/a
Sector
Industrials
Utilities
Industry
Airlines, Airports & Air Services
n/a
HQ country
NZ
US
Primary segment
Aeronautical (regulated airport services)
Regulated Businesses
Market structure
Monopoly
Monopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
74 / 100
79 / 100
Moat domains
Legal, Supply, Demand
Legal, Supply, Demand
Last update
2025-12-28
2026-01-09

Moat coverage

Shared moat types

Permits Rights Of WayLong Term Contracts

Auckland International Airport Limited strengths

Capacity MoatDistribution ControlGeographic Natural

American Water Works Company, Inc. strengths

Concession LicensePhysical Network DensityCompliance AdvantageScale Economies Unit CostGovernment Contracting RelationshipsOperational Excellence

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

American Water Works Company, Inc. segments

Full profile >

Regulated Businesses

Monopoly

91.7%

Military and Contract Water Services (Other)

Duopoly

8.3%

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.