VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

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Wednesday, January 7, 2026

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Stock Comparison

Boston Scientific Corporation vs Chubb Limited

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

Boston Scientific Corporation

BSX · New York Stock Exchange

Market cap (USD)$141.5B
Gross margin (TTM)65.1%
Operating margin (TTM)17.3%
Net margin (TTM)14.4%
SectorHealthcare
IndustryMedical - Devices
CountryUS
Data as of2026-01-04
Moat score
65/ 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 Boston Scientific Corporation's moat claims, evidence, and risks.

View BSX analysis

Chubb Limited

CB · New York Stock Exchange

Market cap (USD)$126.1B
Gross margin (TTM)28.5%
Operating margin (TTM)21.1%
Net margin (TTM)16.5%
SectorFinancials
IndustryInsurance - Property & Casualty
CountryCH
Data as of2026-01-04
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 Chubb Limited's moat claims, evidence, and risks.

View CB analysis

Comparison highlights

  • Moat score gap: Chubb Limited leads (68 / 100 vs 65 / 100 for Boston Scientific Corporation).
  • Segment focus: Boston Scientific Corporation has 5 segments (49.8% in Cardiology); Chubb Limited has 6 segments (40% in North America Commercial P&C Insurance).
  • Primary market structure: Oligopoly vs Competitive. Pricing power: Moderate vs Moderate.
  • Moat breadth: Boston Scientific Corporation has 6 moat types across 3 domains; Chubb Limited has 6 across 4.

Primary market context

Boston Scientific Corporation

Cardiology

Market

Cardiology devices (interventional cardiology, structural heart, electrophysiology, cardiac rhythm management and remote monitoring)

Geography

Global

Customer

Hospitals/cath labs/EP labs and specialty clinics (cardiologists, electrophysiologists)

Role

Medical device OEM / implantables + procedure devices + service-enabled monitoring

Revenue share

49.8%

Chubb Limited

North America Commercial P&C Insurance

Market

Commercial property & casualty and corporate accident & health insurance

Geography

North America

Customer

Businesses and institutions (middle market to large corporates); specialty commercial

Role

Primary insurer / underwriter

Revenue share

40%

Side-by-side metrics

Boston Scientific Corporation
Chubb Limited
Ticker / Exchange
BSX - New York Stock Exchange
CB - New York Stock Exchange
Market cap (USD)
$141.5B
$126.1B
Gross margin (TTM)
65.1%
28.5%
Operating margin (TTM)
17.3%
21.1%
Net margin (TTM)
14.4%
16.5%
Sector
Healthcare
Financials
Industry
Medical - Devices
Insurance - Property & Casualty
HQ country
US
CH
Primary segment
Cardiology
North America Commercial P&C Insurance
Market structure
Oligopoly
Competitive
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
65 / 100
68 / 100
Moat domains
Demand, Legal, Supply
Supply, Demand, Legal, Financial
Last update
2026-01-04
2026-01-04

Moat coverage

Shared moat types

Installed Base ConsumablesDistribution Control

Boston Scientific Corporation strengths

Procurement InertiaTraining Org Change CostsRegulated Standards PipeReputation Reviews

Chubb Limited strengths

Operational ExcellenceBrand TrustCompliance AdvantageCost Of Capital Advantage

Segment mix

Boston Scientific Corporation segments

Full profile >

Endoscopy

Oligopoly

16%

Urology

Competitive

13.1%

Neuromodulation

Oligopoly

6.6%

Cardiology

Oligopoly

49.8%

Peripheral Interventions

Competitive

14.4%

Chubb Limited segments

Full profile >

North America Commercial P&C Insurance

Competitive

40%

North America Personal P&C Insurance

Oligopoly

12%

North America Agricultural Insurance

Oligopoly

5%

Overseas General Insurance

Competitive

27%

Global Reinsurance

Oligopoly

3%

Life Insurance

Competitive

13%

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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Looking for expansion-stage stocks?

Proven models entering the expansion stage with unit economics that work.

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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.