VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Friday, January 2, 2026

Stock Comparison

Automatic Data Processing, Inc. vs Pro Medicus Limited

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

Automatic Data Processing, Inc.

ADP · NASDAQ

Market cap (USD)$102.7B
Gross margin (TTM)49.3%
Operating margin (TTM)19.2%
Net margin (TTM)19.8%
SectorTechnology
IndustryStaffing & Employment Services
CountryUS
Data as of2025-12-30
Moat score
71/ 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 Automatic Data Processing, Inc.'s moat claims, evidence, and risks.

View ADP 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 gap: Pro Medicus Limited leads (80 / 100 vs 71 / 100 for Automatic Data Processing, Inc.).
  • Segment focus: Automatic Data Processing, Inc. has 2 segments (67.5% in Employer Services); Pro Medicus Limited has 2 segments (92.5% in Visage 7 Enterprise Imaging Platform (PACS / CloudPACS)).
  • Primary market structure: Oligopoly vs Oligopoly. Pricing power: Moderate vs Strong.
  • Moat breadth: Automatic Data Processing, Inc. has 7 moat types across 4 domains; Pro Medicus Limited has 6 across 2.

Primary market context

Automatic Data Processing, Inc.

Employer Services

Market

Payroll processing and cloud HCM (HR, time, talent, tax, benefits) software and outsourcing

Geography

Global

Customer

Businesses (SMB to large enterprise)

Role

SaaS and managed services provider

Revenue share

67.5%

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

Automatic Data Processing, Inc.
Pro Medicus Limited
Ticker / Exchange
ADP - NASDAQ
PME - ASX
Market cap (USD)
$102.7B
$15.5B
Gross margin (TTM)
49.3%
n/a
Operating margin (TTM)
19.2%
n/a
Net margin (TTM)
19.8%
n/a
Sector
Technology
Healthcare
Industry
Staffing & Employment Services
n/a
HQ country
US
AU
Primary segment
Employer Services
Visage 7 Enterprise Imaging Platform (PACS / CloudPACS)
Market structure
Oligopoly
Oligopoly
Market share
16.7% (reported)
55% (implied)
HHI estimate
n/a
n/a
Pricing power
Moderate
Strong
Moat score
71 / 100
80 / 100
Moat domains
Demand, Legal, Supply, Financial
Demand, Supply
Last update
2025-12-30
2026-01-02

Moat coverage

Shared moat types

Switching Costs GeneralSuite Bundling

Automatic Data Processing, Inc. strengths

Compliance AdvantageScale Economies Unit CostFloat PrepaymentRegulated Standards PipeUnderwriting Risk Pooling

Pro Medicus Limited strengths

Data Workflow LockinKeystone ComponentOperational ExcellenceLong Term Contracts

Segment mix

Automatic Data Processing, Inc. segments

Full profile >

Employer Services

Oligopoly

67.5%

Professional Employer Organization (PEO) Services

Competitive

32.5%

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.