VOL. XCIV, NO. 247

* MOAT STOCKS COMPARISON *

NO ADVICE

Friday, December 26, 2025

Stock Comparison

Moody's Corporation vs Merck & Co., Inc.

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

Moody's Corporation

MCO · New York Stock Exchange

Market cap (USD)
SectorFinancials
CountryUS
Data as of2025-12-21
Moat score
79/ 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

Moody's Corporation
Merck & Co., Inc.
Ticker / Exchange
MCO - New York Stock Exchange
MRK - New York Stock Exchange
Market cap (USD)
n/a
$250.9B
Sector
Financials
Healthcare
HQ country
US
US
Primary segment
Moody's Investors Service (Credit Ratings)
Pharmaceutical
Market structure
Oligopoly
Competitive
Market share
29%-32% (estimated)
n/a
HHI estimate
3,568
n/a
Pricing power
Strong
Moderate
Moat score
79 / 100
71 / 100
Moat domains
Legal, Network, Demand, Supply
Legal, Supply, Demand
Last update
2025-12-21
2025-12-22

Moat coverage

Shared moat types

Regulated Standards PipeData Workflow LockinScope Economies

Moody's Corporation strengths

De Facto StandardBrand Trust

Merck & Co., Inc. strengths

IP Choke PointCapex Knowhow Scale

Segment mix

Moody's Corporation segments

Full profile >

Moody's Investors Service (Credit Ratings)

Oligopoly

53.5%

Moody's Analytics (Risk & Data/Software)

Competitive

46.5%

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 Pricing, features, and availability may be incomplete or out of date.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