VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Saturday, January 3, 2026

Stock Comparison

Costco Wholesale Corporation vs Pro Medicus Limited

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

Costco Wholesale Corporation

COST · Nasdaq Global Select Market

Market cap (USD)$380.7B
Gross margin (TTM)12.9%
Operating margin (TTM)3.8%
Net margin (TTM)3%
SectorConsumer
IndustryDiscount Stores
CountryUS
Data as of2025-12-21
Moat score
80/ 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 Costco Wholesale Corporation's moat claims, evidence, and risks.

View COST analysis

Pro Medicus Limited

PME · ASX

Market cap (USD)$15.5B
Gross margin (TTM)
Operating margin (TTM)
Net margin (TTM)
SectorHealthcare
Industry
CountryAU
Data as of
Moat score
80/ 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 Pro Medicus Limited's moat claims, evidence, and risks.

View PME analysis

Comparison highlights

  • Moat score: both at 80 / 100.
  • Segment focus: Costco Wholesale Corporation has 2 segments (98.1% in Warehouse club retail); Pro Medicus Limited has 2 segments (92.5% in Visage 7 Enterprise Imaging Platform (PACS / CloudPACS)).
  • Primary market structure: Oligopoly vs Oligopoly. Pricing power: Weak vs Strong.
  • Moat breadth: Costco Wholesale Corporation has 6 moat types across 3 domains; Pro Medicus Limited has 6 across 2.

Primary market context

Costco Wholesale Corporation

Warehouse club retail

Market

Membership warehouse club retail (warehouse clubs, ancillary services, and e-commerce)

Geography

Global

Customer

Households and small businesses

Role

Retailer (membership club)

Revenue share

98.1%

Pro Medicus Limited

Visage 7 Enterprise Imaging Platform (PACS / CloudPACS)

Market

Enterprise imaging / PACS and related modules for hospitals and integrated delivery networks (IDNs)

Geography

Primarily North America; also Europe and Australia

Customer

Hospitals, imaging centers, integrated delivery networks (IDNs)

Role

Healthcare IT software vendor / platform provider

Revenue share

92.5%

Side-by-side metrics

Costco Wholesale Corporation
Pro Medicus Limited
Ticker / Exchange
COST - Nasdaq Global Select Market
PME - ASX
Market cap (USD)
$380.7B
$15.5B
Gross margin (TTM)
12.9%
n/a
Operating margin (TTM)
3.8%
n/a
Net margin (TTM)
3%
n/a
Sector
Consumer
Healthcare
Industry
Discount Stores
n/a
HQ country
US
AU
Primary segment
Warehouse club retail
Visage 7 Enterprise Imaging Platform (PACS / CloudPACS)
Market structure
Oligopoly
Oligopoly
Market share
n/a
55% (implied)
HHI estimate
n/a
n/a
Pricing power
Weak
Strong
Moat score
80 / 100
80 / 100
Moat domains
Supply, Financial, Demand
Demand, Supply
Last update
2025-12-21
2026-01-03

Moat coverage

Shared moat types

Operational Excellence

Costco Wholesale Corporation strengths

Scale Economies Unit CostNegative Working CapitalBrand TrustHabit DefaultFloat Prepayment

Pro Medicus Limited strengths

Data Workflow LockinKeystone ComponentSuite BundlingSwitching Costs GeneralLong Term Contracts

Segment mix

Costco Wholesale Corporation segments

Full profile >

Warehouse club retail

Oligopoly

98.1%

Membership fees (subscription)

Oligopoly

1.9%

Pro Medicus Limited segments

Full profile >

Visage 7 Enterprise Imaging Platform (PACS / CloudPACS)

Oligopoly

92.5%

Visage RIS (Radiology Information System) and Promedicus.net

Oligopoly

7.5%

Want the full wide moat stocks list?

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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.