VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, December 31, 2025

Stock Comparison

Amazon.com, Inc. vs UnitedHealth Group Incorporated

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

Amazon.com, Inc.

AMZN · NASDAQ

Market cap (USD)$2.5T
SectorConsumer
CountryUS
Data as of2025-12-29
Moat score
87/ 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 Amazon.com, Inc.'s moat claims, evidence, and risks.

View AMZN analysis

UnitedHealth Group Incorporated

UNH · New York Stock Exchange

Market cap (USD)$123.8B
SectorHealthcare
CountryUS
Data as of2025-12-31
Moat score
64/ 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 UnitedHealth Group Incorporated's moat claims, evidence, and risks.

View UNH analysis

Comparison highlights

  • Moat score gap: Amazon.com, Inc. leads (87 / 100 vs 64 / 100 for UnitedHealth Group Incorporated).
  • Segment focus: Amazon.com, Inc. has 4 segments (73.5% in Amazon Stores (Retail, Marketplace, Prime Subscriptions)); UnitedHealth Group Incorporated has 4 segments (74.9% in UnitedHealthcare).
  • Primary market structure: Oligopoly vs Oligopoly. Pricing power: Moderate vs Weak.
  • Moat breadth: Amazon.com, Inc. has 10 moat types across 4 domains; UnitedHealth Group Incorporated has 5 across 2.

Primary market context

Amazon.com, Inc.

Amazon Stores (Retail, Marketplace, Prime Subscriptions)

Market

US retail ecommerce marketplace and online retail (integrated fulfillment + membership shipping)

Geography

United States

Customer

Consumers and third-party merchants

Role

Marketplace operator, retailer, and fulfillment provider

Revenue share

73.5%

UnitedHealth Group Incorporated

UnitedHealthcare

Market

U.S. health benefits / managed care (commercial, Medicare Advantage, Medicaid managed care)

Geography

United States (primarily)

Customer

Employers, individuals, and government-sponsored programs

Role

Health insurer / managed care organization

Revenue share

74.9%

Side-by-side metrics

Amazon.com, Inc.
UnitedHealth Group Incorporated
Ticker / Exchange
AMZN - NASDAQ
UNH - New York Stock Exchange
Market cap (USD)
$2.5T
$123.8B
Sector
Consumer
Healthcare
HQ country
US
US
Primary segment
Amazon Stores (Retail, Marketplace, Prime Subscriptions)
UnitedHealthcare
Market structure
Oligopoly
Oligopoly
Market share
39%-42% (estimated)
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Weak
Moat score
87 / 100
64 / 100
Moat domains
Supply, Demand, Network, Financial
Supply, Demand
Last update
2025-12-29
2025-12-31

Moat coverage

Shared moat types

Suite Bundling

Amazon.com, Inc. strengths

Capex Knowhow ScaleScope EconomiesLong Term ContractsTwo Sided NetworkPhysical Network DensityHabit DefaultNegative Working CapitalDistribution ControlData Network Effects

UnitedHealth Group Incorporated strengths

Scale Economies Unit CostOperational ExcellenceData Workflow LockinTraining Org Change Costs

Segment mix

Amazon.com, Inc. segments

Full profile >

Amazon Web Services (AWS)

Oligopoly

16.9%

Amazon Stores (Retail, Marketplace, Prime Subscriptions)

Oligopoly

73.5%

Advertising Services (Amazon Ads / Retail Media)

Oligopoly

8.8%

Other (healthcare, content licensing/distribution, shipping services, co-branded credit card agreements, etc.)

Competitive

0.9%

UnitedHealth Group Incorporated segments

Full profile >

UnitedHealthcare

Oligopoly

74.9%

Optum Health

Competitive

9.9%

Optum Insight

Competitive

1.7%

Optum Rx

Oligopoly

13.5%

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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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.