VOL. XCIV, NO. 247
★ WIDE MOAT STOCKS COMPARISON ★
NO ADVICE
Wednesday, January 7, 2026
Stock Comparison
Chubb Limited vs Costco Wholesale Corporation
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
Chubb Limited
CB · New York Stock Exchange
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 analysisCostco Wholesale Corporation
COST · Nasdaq Global Select Market
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 analysisComparison highlights
- Moat score gap: Costco Wholesale Corporation leads (80 / 100 vs 68 / 100 for Chubb Limited).
- Segment focus: Chubb Limited has 6 segments (40% in North America Commercial P&C Insurance); Costco Wholesale Corporation has 2 segments (98.1% in Warehouse club retail).
- Primary market structure: Competitive vs Oligopoly. Pricing power: Moderate vs Weak.
- Moat breadth: Chubb Limited has 6 moat types across 4 domains; Costco Wholesale Corporation has 6 across 3.
Primary market context
Chubb Limited
North America Commercial P&C Insurance
Commercial property & casualty and corporate accident & health insurance
North America
Businesses and institutions (middle market to large corporates); specialty commercial
Primary insurer / underwriter
40%
Costco Wholesale Corporation
Warehouse club retail
Membership warehouse club retail (warehouse clubs, ancillary services, and e-commerce)
Global
Households and small businesses
Retailer (membership club)
98.1%
Side-by-side metrics
Moat coverage
Shared moat types
Chubb Limited strengths
Costco Wholesale Corporation strengths
Segment mix
Chubb Limited segments
Full profile >North America Commercial P&C Insurance
Competitive
North America Personal P&C Insurance
Oligopoly
North America Agricultural Insurance
Oligopoly
Overseas General Insurance
Competitive
Global Reinsurance
Oligopoly
Life Insurance
Competitive
Costco Wholesale Corporation segments
Full profile >Warehouse club retail
Oligopoly
Membership fees (subscription)
Oligopoly
Want the full wide moat stocks list?
Browse the full ranking of wide moat stocks, updated with moat scores and segment context.
View the moat stocks listLooking for expansion-stage stocks?
Proven models entering the expansion stage with unit economics that work.
View expansion-stage stocksCuration & 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.