VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Thursday, January 8, 2026

Stock Comparison

GSK plc vs Judges Scientific plc

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

GSK plc

GSK · London Stock Exchange

Market cap (USD)$75.3B
Gross margin (TTM)72.4%
Operating margin (TTM)23.5%
Net margin (TTM)17.1%
SectorHealthcare
IndustryDrug Manufacturers - General
CountryGB
Data as of2025-12-28
Moat score
62/ 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 GSK plc's moat claims, evidence, and risks.

View GSK analysis

Judges Scientific plc

JDG · London Stock Exchange - AIM

Market cap (USD)
Gross margin (TTM)
Operating margin (TTM)
Net margin (TTM)
SectorTechnology
Industry
CountryGB
Data as of2026-01-06
Moat score
63/ 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 Judges Scientific plc's moat claims, evidence, and risks.

View JDG analysis

Comparison highlights

  • Moat score gap: Judges Scientific plc leads (63 / 100 vs 62 / 100 for GSK plc).
  • Segment focus: GSK plc has 3 segments (37.6% in Specialty Medicines); Judges Scientific plc has 2 segments (51.7% in Vacuum).
  • Primary market structure: Oligopoly vs Competitive. Pricing power: Strong vs Moderate.
  • Moat breadth: GSK plc has 4 moat types across 3 domains; Judges Scientific plc has 3 across 1.

Primary market context

GSK plc

Specialty Medicines

Market

Branded specialty pharmaceuticals (HIV, oncology, immunology/respiratory)

Geography

Global

Customer

Hospitals, specialist physicians, payers

Role

Innovator & branded manufacturer

Revenue share

37.6%

Judges Scientific plc

Vacuum

Market

Vacuum and surface-science related instrumentation (e.g., UHV/vacuum components and systems, thin-film/surface engineering adjacent tools)

Geography

Global

Customer

Research labs and high-tech manufacturing

Role

Equipment manufacturer

Revenue share

51.7%

Side-by-side metrics

GSK plc
Judges Scientific plc
Ticker / Exchange
GSK - London Stock Exchange
JDG - London Stock Exchange - AIM
Market cap (USD)
$75.3B
n/a
Gross margin (TTM)
72.4%
n/a
Operating margin (TTM)
23.5%
n/a
Net margin (TTM)
17.1%
n/a
Sector
Healthcare
Technology
Industry
Drug Manufacturers - General
n/a
HQ country
GB
GB
Primary segment
Specialty Medicines
Vacuum
Market structure
Oligopoly
Competitive
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Strong
Moderate
Moat score
62 / 100
63 / 100
Moat domains
Supply, Legal, Demand
Demand
Last update
2025-12-28
2026-01-06

Moat coverage

Shared moat types

Switching Costs General

GSK plc strengths

Capex Knowhow ScaleCompliance AdvantageIP Choke Point

Judges Scientific plc strengths

Brand TrustBuy-and-build acquisition engine

Segment mix

GSK plc segments

Full profile >

Vaccines

Oligopoly

29.1%

Specialty Medicines

Oligopoly

37.6%

General Medicines

Competitive

33.2%

Judges Scientific plc segments

Full profile >

Materials Sciences

Competitive

48.4%

Vacuum

Competitive

51.7%

Want the full wide moat stocks list?

Browse the full ranking of wide moat stocks, updated with moat scores and segment context.

View the moat stocks list

Looking for expansion-stage stocks?

Proven models entering the expansion stage with unit economics that work.

View expansion-stage stocks

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.