VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Thursday, January 8, 2026

Stock Comparison

Paychex, Inc. vs Pro Medicus Limited

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

Paychex, Inc.

PAYX · NASDAQ Global Select Market

Market cap (USD)$39.4B
Gross margin (TTM)73.4%
Operating margin (TTM)37.1%
Net margin (TTM)26.5%
SectorIndustrials
IndustryStaffing & Employment Services
CountryUS
Data as of2026-01-04
Moat score
66/ 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 Paychex, Inc.'s moat claims, evidence, and risks.

View PAYX analysis

Pro Medicus Limited

PME · ASX

Market cap (USD)$22.3B
Gross margin (TTM)77.8%
Operating margin (TTM)72.1%
Net margin (TTM)52.9%
SectorHealthcare
IndustryMedical - Healthcare Information Services
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 66 / 100 for Paychex, Inc.).
  • Segment focus: Paychex, Inc. has 3 segments (73% in Management Solutions); 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: Paychex, Inc. has 7 moat types across 4 domains; Pro Medicus Limited has 6 across 2.

Primary market context

Paychex, Inc.

Management Solutions

Market

Payroll processing and integrated HCM solutions for SMB and mid-market employers

Geography

United States (primarily)

Customer

Employers (SMB and mid-market)

Role

HCM SaaS + outsourced payroll/HR service provider

Revenue share

73%

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

Paychex, Inc.
Pro Medicus Limited
Ticker / Exchange
PAYX - NASDAQ Global Select Market
PME - ASX
Market cap (USD)
$39.4B
$22.3B
Gross margin (TTM)
73.4%
77.8%
Operating margin (TTM)
37.1%
72.1%
Net margin (TTM)
26.5%
52.9%
Sector
Industrials
Healthcare
Industry
Staffing & Employment Services
Medical - Healthcare Information Services
HQ country
US
AU
Primary segment
Management Solutions
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
Moderate
Strong
Moat score
66 / 100
80 / 100
Moat domains
Demand, Supply, Legal, Financial
Demand, Supply
Last update
2026-01-04
2026-01-08

Moat coverage

Shared moat types

Data Workflow LockinSuite BundlingSwitching Costs General

Paychex, Inc. strengths

Service Field NetworkCompliance AdvantageUnderwriting Risk PoolingFloat Prepayment

Pro Medicus Limited strengths

Keystone ComponentOperational ExcellenceLong Term Contracts

Segment mix

Paychex, Inc. segments

Full profile >

Management Solutions

Oligopoly

73%

PEO and Insurance Solutions

Competitive

24.1%

Client funds float (interest on funds held for clients)

Oligopoly

2.9%

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.