VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Sunday, January 11, 2026

Stock Comparison

Auto Trader Group plc vs Sanofi

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

Auto Trader Group plc

AUTO · London Stock Exchange

Market cap (USD)
Gross margin (TTM)
Operating margin (TTM)
Net margin (TTM)
SectorCommunication Services
Industry
CountryGB
Data as of2026-01-10
Moat score
96/ 100

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

Full stock profile

Dive deeper into Auto Trader Group plc's moat claims, evidence, and risks.

View AUTO analysis

Sanofi

SAN · Euronext Paris

Market cap (USD)$102.9B
Gross margin (TTM)72%
Operating margin (TTM)18.7%
Net margin (TTM)20.2%
SectorHealthcare
IndustryDrug Manufacturers - General
CountryFR
Data as of2025-12-30
Moat score
74/ 100

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

Full stock profile

Dive deeper into Sanofi's moat claims, evidence, and risks.

View SAN analysis

Comparison highlights

  • Moat score gap: Auto Trader Group plc leads (96 / 100 vs 74 / 100 for Sanofi).
  • Segment focus: Auto Trader Group plc has 2 segments (93.3% in Autotrader (UK automotive marketplace & data platform)); Sanofi has 3 segments (79.8% in Pharma (Prescription Medicines)).
  • Primary market structure: Quasi-Monopoly vs Oligopoly. Pricing power: Strong vs Moderate.
  • Moat breadth: Auto Trader Group plc has 4 moat types across 2 domains; Sanofi has 5 across 3.

Primary market context

Auto Trader Group plc

Autotrader (UK automotive marketplace & data platform)

Market

UK digital automotive marketplace (new & used) with retailer advertising/data products

Geography

United Kingdom

Customer

Consumers, vehicle retailers, OEMs/advertising agencies

Role

Two-sided marketplace + advertising/data & workflow tools

Revenue share

93.3%

Sanofi

Pharma (Prescription Medicines)

Market

Branded prescription pharmaceuticals (immunology, rare disease, neurology, oncology, general medicines)

Geography

Global

Customer

Patients via payers/providers and channel partners (wholesalers, pharmacies, hospitals)

Role

Research-based drug developer, manufacturer, and marketer

Revenue share

79.8%

Side-by-side metrics

Auto Trader Group plc
Sanofi
Ticker / Exchange
AUTO - London Stock Exchange
SAN - Euronext Paris
Market cap (USD)
n/a
$102.9B
Gross margin (TTM)
n/a
72%
Operating margin (TTM)
n/a
18.7%
Net margin (TTM)
n/a
20.2%
Sector
Communication Services
Healthcare
Industry
n/a
Drug Manufacturers - General
HQ country
GB
FR
Primary segment
Autotrader (UK automotive marketplace & data platform)
Pharma (Prescription Medicines)
Market structure
Quasi-Monopoly
Oligopoly
Market share
75%-80% (reported)
n/a
HHI estimate
n/a
n/a
Pricing power
Strong
Moderate
Moat score
96 / 100
74 / 100
Moat domains
Network, Demand
Legal, Supply, Demand
Last update
2026-01-10
2025-12-30

Moat coverage

Shared moat types

No overlap yet.

Auto Trader Group plc strengths

Two Sided NetworkData Workflow LockinHabit DefaultEcosystem Complements

Sanofi strengths

Regulated Standards PipeIP Choke PointLearning Curve YieldBrand TrustDistribution Control

Segment mix

Auto Trader Group plc segments

Full profile >

Autotrader (UK automotive marketplace & data platform)

Quasi-Monopoly

93.3%

Autorama (vehicle leasing marketplace)

Competitive

6.7%

Sanofi segments

Full profile >

Pharma (Prescription Medicines)

Oligopoly

79.8%

Vaccines

Oligopoly

20.2%

Opella (Consumer Healthcare - Sanofi minority stake)

Competitive

n/a

Want the full wide moat stocks list?

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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.