VOL. XCIV, NO. 247
★ WIDE MOAT STOCKS COMPARISON ★
NO ADVICE
Tuesday, December 30, 2025
Stock Comparison
Merck & Co., Inc. vs Sanofi
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
Merck & 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 analysisSanofi
SAN · Euronext Paris
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Comparison highlights
- Moat score gap: Sanofi leads (74 / 100 vs 71 / 100 for Merck & Co., Inc.).
- Segment focus: Merck & Co., Inc. has 2 segments (89.5% in Pharmaceutical); Sanofi has 3 segments (79.8% in Pharma (Prescription Medicines)).
- Primary market structure: Competitive vs Oligopoly. Pricing power: Moderate vs Moderate.
- Moat breadth: Merck & Co., Inc. has 5 moat types across 3 domains; Sanofi has 5 across 3.
Primary market context
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%
Sanofi
Pharma (Prescription Medicines)
Branded prescription pharmaceuticals (immunology, rare disease, neurology, oncology, general medicines)
Global
Patients via payers/providers and channel partners (wholesalers, pharmacies, hospitals)
Research-based drug developer, manufacturer, and marketer
79.8%
Side-by-side metrics
Moat coverage
Shared moat types
Merck & Co., Inc. strengths
Sanofi strengths
Segment mix
Merck & Co., Inc. segments
Full profile >Pharmaceutical
Competitive
Animal Health
Oligopoly
Sanofi segments
Full profile >Pharma (Prescription Medicines)
Oligopoly
Vaccines
Oligopoly
Opella (Consumer Healthcare - Sanofi minority stake)
Competitive
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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 Pricing, features, and availability may be incomplete or out of date.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.