VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, December 31, 2025

Stock Comparison

Aon plc vs Siemens Healthineers AG

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

Aon plc

AON · New York Stock Exchange

Market cap (USD)$76.6B
SectorFinancials
CountryIE
Data as of2025-12-31
Moat score
70/ 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 Aon plc's moat claims, evidence, and risks.

View AON analysis

Siemens Healthineers AG

SHL · XETRA

Market cap (USD)
SectorHealthcare
CountryDE
Data as of2025-12-28
Moat score
68/ 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 Siemens Healthineers AG's moat claims, evidence, and risks.

View SHL analysis

Comparison highlights

  • Moat score gap: Aon plc leads (70 / 100 vs 68 / 100 for Siemens Healthineers AG).
  • Segment focus: Aon plc has 2 segments (67% in Risk Capital); Siemens Healthineers AG has 4 segments (54.6% in Imaging).
  • Moat breadth: Aon plc has 6 moat types across 3 domains; Siemens Healthineers AG has 8 across 3.

Primary market context

Aon plc

Risk Capital

Market

Large-account commercial insurance & reinsurance brokerage and risk advisory

Geography

Global

Customer

Enterprises, insurers, reinsurers

Role

Intermediary/advisor

Revenue share

67%

Siemens Healthineers AG

Imaging

Market

Diagnostic medical imaging equipment and related software/services (MRI, CT, X-ray, molecular imaging, ultrasound)

Geography

Global

Customer

Hospitals, imaging centers, clinics, and integrated delivery networks

Role

OEM + digital platform and service provider

Revenue share

54.6%

Side-by-side metrics

Aon plc
Siemens Healthineers AG
Ticker / Exchange
AON - New York Stock Exchange
SHL - XETRA
Market cap (USD)
$76.6B
n/a
Sector
Financials
Healthcare
HQ country
IE
DE
Primary segment
Risk Capital
Imaging
Market structure
Oligopoly
Oligopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
70 / 100
68 / 100
Moat domains
Demand, Supply, Legal
Supply, Demand, Network
Last update
2025-12-31
2025-12-28

Moat coverage

Shared moat types

Data Workflow LockinSwitching Costs GeneralService Field Network

Aon plc strengths

Brand TrustCompliance AdvantageScale Economies Unit Cost

Siemens Healthineers AG strengths

Capex Knowhow ScaleLong Term ContractsInstalled Base ConsumablesDesign In QualificationEcosystem Complements

Segment mix

Aon plc segments

Full profile >

Risk Capital

Oligopoly

67%

Human Capital

Oligopoly

33.2%

Siemens Healthineers AG segments

Full profile >

Imaging

Oligopoly

54.6%

Diagnostics

Oligopoly

18.7%

Varian

Oligopoly

17.6%

Advanced Therapies

Oligopoly

9.1%

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.