VOL. XCIV, NO. 247

* WIDE MOAT STOCKS COMPARISON *

NO ADVICE

Sunday, December 28, 2025

Stock Comparison

Thales S.A. vs Merck & Co., Inc.

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

Thales S.A.

HO · Euronext Paris

Market cap (USD)$55.3B
SectorIndustrials
CountryFR
Data as of2025-12-28
Moat score
73/ 100

Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.

View full moat analysis >

Merck & Co., Inc.

MRK · New York Stock Exchange

Market cap (USD)$250.9B
SectorHealthcare
CountryUS
Data as of2025-12-22
Moat score
71/ 100

Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.

View full moat analysis >

Side-by-side metrics

Thales S.A.
Merck & Co., Inc.
Ticker / Exchange
HO - Euronext Paris
MRK - New York Stock Exchange
Market cap (USD)
$55.3B
$250.9B
Sector
Industrials
Healthcare
HQ country
FR
US
Primary segment
Defence
Pharmaceutical
Market structure
Oligopoly
Competitive
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
73 / 100
71 / 100
Moat domains
Legal, Demand, Supply
Legal, Supply, Demand
Last update
2025-12-28
2025-12-22

Moat coverage

Shared moat types

Regulated Standards PipeCapex Knowhow Scale

Thales S.A. strengths

Government Contracting RelationshipsLong Term ContractsDesign In QualificationService Field NetworkBrand TrustSuite Bundling

Merck & Co., Inc. strengths

IP Choke PointScope EconomiesData Workflow Lockin

Segment mix

Thales S.A. segments

Full profile >

Defence

Oligopoly

53.3%

Aerospace

Oligopoly

26.6%

Cyber & Digital

Competitive

19.6%

Merck & Co., Inc. segments

Full profile >

Pharmaceutical

Competitive

89.5%

Animal Health

Oligopoly

9.2%

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 Pricing, features, and availability may be incomplete or out of date.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.