VOL. XCIV, NO. 247
★ WIDE MOAT STOCKS COMPARISON ★
NO ADVICE
Monday, December 29, 2025
Stock Comparison
Amazon.com, Inc. vs Merck & Co., Inc.
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
Amazon.com, Inc.
AMZN · NASDAQ
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into Amazon.com, Inc.'s moat claims, evidence, and risks.
View AMZN analysisMerck & Co., Inc.
MRK · 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 Merck & Co., Inc.'s moat claims, evidence, and risks.
View MRK analysisComparison highlights
- Moat score gap: Amazon.com, Inc. leads (87 / 100 vs 71 / 100 for Merck & Co., Inc.).
- Segment focus: Amazon.com, Inc. has 4 segments (73.5% in Amazon Stores (Retail, Marketplace, Prime Subscriptions)); Merck & Co., Inc. has 2 segments (89.5% in Pharmaceutical).
- Primary market structure: Oligopoly vs Competitive. Pricing power: Moderate vs Moderate.
- Moat breadth: Amazon.com, Inc. has 10 moat types across 4 domains; Merck & Co., Inc. has 5 across 3.
Primary market context
Amazon.com, Inc.
Amazon Stores (Retail, Marketplace, Prime Subscriptions)
US retail ecommerce marketplace and online retail (integrated fulfillment + membership shipping)
United States
Consumers and third-party merchants
Marketplace operator, retailer, and fulfillment provider
73.5%
Merck & Co., Inc.
Pharmaceutical
Branded prescription pharmaceuticals & human vaccines
Global
Wholesalers/retailers, managed care and government payers, hospitals/clinics
R&D-intensive innovator, manufacturer, and marketer
89.5%
Side-by-side metrics
Moat coverage
Shared moat types
Amazon.com, Inc. strengths
Merck & Co., Inc. strengths
Segment mix
Amazon.com, Inc. segments
Full profile >Amazon Web Services (AWS)
Oligopoly
Amazon Stores (Retail, Marketplace, Prime Subscriptions)
Oligopoly
Advertising Services (Amazon Ads / Retail Media)
Oligopoly
Other (healthcare, content licensing/distribution, shipping services, co-branded credit card agreements, etc.)
Competitive
Merck & Co., Inc. segments
Full profile >Pharmaceutical
Competitive
Animal Health
Oligopoly
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View the moat stocks listCuration & 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.