VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Friday, January 2, 2026

Stock Comparison

IDEXX Laboratories, Inc. vs Martin Marietta Materials, Inc.

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

IDEXX Laboratories, Inc.

IDXX · NASDAQ

Market cap (USD)$53.3B
Gross margin (TTM)61.7%
Operating margin (TTM)31.3%
Net margin (TTM)24.7%
SectorHealthcare
IndustryMedical - Diagnostics & Research
CountryUS
Data as of2025-12-31
Moat score
82/ 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 IDEXX Laboratories, Inc.'s moat claims, evidence, and risks.

View IDXX analysis

Martin Marietta Materials, Inc.

MLM · NYSE

Market cap (USD)$37.9B
Gross margin (TTM)
Operating margin (TTM)
Net margin (TTM)
SectorMaterials
IndustryConstruction Materials
CountryUS
Data as of2026-01-01
Moat score
78/ 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 Martin Marietta Materials, Inc.'s moat claims, evidence, and risks.

View MLM analysis

Comparison highlights

  • Moat score gap: IDEXX Laboratories, Inc. leads (82 / 100 vs 78 / 100 for Martin Marietta Materials, Inc.).
  • Segment focus: IDEXX Laboratories, Inc. has 4 segments (91.7% in Companion Animal Group); Martin Marietta Materials, Inc. has 3 segments (52.4% in East Group).
  • Moat breadth: IDEXX Laboratories, Inc. has 5 moat types across 3 domains; Martin Marietta Materials, Inc. has 4 across 2.

Primary market context

IDEXX Laboratories, Inc.

Companion Animal Group

Market

Veterinary diagnostics and practice management software for companion animals

Geography

Global

Customer

Veterinary practices, corporate veterinary groups, and reference laboratories

Role

Diagnostics platform owner (in-clinic instruments + consumables) and reference lab/service provider; practice management software provider

Revenue share

91.7%

Martin Marietta Materials, Inc.

East Group

Market

Construction aggregates and asphalt products (crushed stone, sand & gravel; asphalt) in local/regional markets

Geography

United States (East/Southeast and adjacent regions)

Customer

Infrastructure agencies, construction contractors, and downstream materials producers (asphalt/ready-mix)

Role

Quarry/mining operator and building materials producer/distributor

Revenue share

52.4%

Side-by-side metrics

IDEXX Laboratories, Inc.
Martin Marietta Materials, Inc.
Ticker / Exchange
IDXX - NASDAQ
MLM - NYSE
Market cap (USD)
$53.3B
$37.9B
Gross margin (TTM)
61.7%
n/a
Operating margin (TTM)
31.3%
n/a
Net margin (TTM)
24.7%
n/a
Sector
Healthcare
Materials
Industry
Medical - Diagnostics & Research
Construction Materials
HQ country
US
US
Primary segment
Companion Animal Group
East Group
Market structure
Oligopoly
Oligopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Strong
Strong
Moat score
82 / 100
78 / 100
Moat domains
Demand, Supply, Legal
Supply, Financial
Last update
2025-12-31
2026-01-01

Moat coverage

Shared moat types

Physical Network Density

IDEXX Laboratories, Inc. strengths

Installed Base ConsumablesData Workflow LockinRegulated Standards PipeCompliance Advantage

Martin Marietta Materials, Inc. strengths

Geographic NaturalBenchmark Pricing PowerCapex Knowhow Scale

Segment mix

IDEXX Laboratories, Inc. segments

Full profile >

Companion Animal Group

Oligopoly

91.7%

Water Quality Products

Oligopoly

4.7%

Livestock, Poultry and Dairy

Competitive

3.1%

Other (OPTI Medical and out-licensing)

Competitive

0.4%

Martin Marietta Materials, Inc. segments

Full profile >

East Group

Oligopoly

52.4%

West Group

Oligopoly

40.9%

Specialties (formerly Magnesia Specialties)

Oligopoly

6.7%

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

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.