VOL. XCIV, NO. 247

* MOAT STOCKS COMPARISON *

NO ADVICE

Friday, December 26, 2025

Stock Comparison

Merck & Co., Inc. vs Zoetis Inc.

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

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 >

Zoetis Inc.

ZTS · New York Stock Exchange

Market cap (USD)$55.3B
SectorHealthcare
CountryUS
Data as of2025-12-26
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 >

Side-by-side metrics

Merck & Co., Inc.
Zoetis Inc.
Ticker / Exchange
MRK - New York Stock Exchange
ZTS - New York Stock Exchange
Market cap (USD)
$250.9B
$55.3B
Sector
Healthcare
Healthcare
HQ country
US
US
Primary segment
Pharmaceutical
Companion Animal Products
Market structure
Competitive
Oligopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Strong
Moat score
71 / 100
73 / 100
Moat domains
Legal, Supply, Demand
Demand, Supply, Legal
Last update
2025-12-22
2025-12-26

Moat coverage

Shared moat types

IP Choke PointRegulated Standards Pipe

Merck & Co., Inc. strengths

Capex Knowhow ScaleScope EconomiesData Workflow Lockin

Zoetis Inc. strengths

Brand TrustService Field NetworkInstalled Base ConsumablesCapacity MoatDistribution ControlCompliance AdvantageOperational Excellence

Segment mix

Merck & Co., Inc. segments

Full profile >

Pharmaceutical

Competitive

89.5%

Animal Health

Oligopoly

9.2%

Zoetis Inc. segments

Full profile >

Companion Animal Products

Oligopoly

67.8%

Livestock Products

Oligopoly

31.3%

Client Supply Services & Human Health

Competitive

0.9%

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 Pricing, features, and availability may be incomplete or out of date.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