VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Thursday, January 8, 2026

Stock Comparison

CSX Corporation vs ResMed Inc.

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

CSX Corporation

CSX · NASDAQ

Market cap (USD)$66.9B
Gross margin (TTM)36.6%
Operating margin (TTM)30.7%
Net margin (TTM)19.2%
SectorIndustrials
IndustryRailroads
CountryUS
Data as of2026-01-02
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 CSX Corporation's moat claims, evidence, and risks.

View CSX analysis

ResMed Inc.

RMD · New York Stock Exchange

Market cap (USD)$36B
Gross margin (TTM)60.1%
Operating margin (TTM)33.2%
Net margin (TTM)27.4%
SectorHealthcare
IndustryMedical - Instruments & Supplies
CountryUS
Data as of2026-01-04
Moat score
76/ 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 ResMed Inc.'s moat claims, evidence, and risks.

View RMD analysis

Comparison highlights

  • Moat score gap: ResMed Inc. leads (76 / 100 vs 74 / 100 for CSX Corporation).
  • Segment focus: CSX Corporation has 5 segments (61.2% in Merchandise (Rail)); ResMed Inc. has 2 segments (87.5% in Sleep and Breathing Health).
  • Moat breadth: CSX Corporation has 6 moat types across 2 domains; ResMed Inc. has 7 across 2.

Primary market context

CSX Corporation

Merchandise (Rail)

Market

Eastern U.S. rail freight transportation (merchandise carload)

Geography

Eastern United States (CSX network; interchange to other railroads)

Customer

Industrial, agricultural, automotive and consumer goods shippers; logistics providers

Role

Common-carrier freight railroad (line-haul + switching/terminal)

Revenue share

61.2%

ResMed Inc.

Sleep and Breathing Health

Market

Sleep apnea and respiratory care devices and related consumables (PAP, masks, ventilation) plus connected monitoring services

Geography

Global

Customer

DME/HME providers, sleep clinics, hospitals, patients

Role

Medical device OEM + connected care software/data services

Revenue share

87.5%

Side-by-side metrics

CSX Corporation
ResMed Inc.
Ticker / Exchange
CSX - NASDAQ
RMD - New York Stock Exchange
Market cap (USD)
$66.9B
$36B
Gross margin (TTM)
36.6%
60.1%
Operating margin (TTM)
30.7%
33.2%
Net margin (TTM)
19.2%
27.4%
Sector
Industrials
Healthcare
Industry
Railroads
Medical - Instruments & Supplies
HQ country
US
US
Primary segment
Merchandise (Rail)
Sleep and Breathing Health
Market structure
Oligopoly
Oligopoly
Market share
n/a
58%-66% (estimated)
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
74 / 100
76 / 100
Moat domains
Supply, Legal
Demand, Legal
Last update
2026-01-02
2026-01-04

Moat coverage

Shared moat types

No overlap yet.

CSX Corporation strengths

Physical Network DensityPermits Rights Of WayCapex Knowhow ScaleOperational ExcellenceGeographic NaturalScale Economies Unit Cost

ResMed Inc. strengths

Installed Base ConsumablesData Workflow LockinBrand TrustCompliance AdvantageIP Choke PointLong Term ContractsTraining Org Change Costs

Segment mix

CSX Corporation segments

Full profile >

Merchandise (Rail)

Oligopoly

61.2%

Intermodal (Rail)

Competitive

14.1%

Coal (Rail)

Oligopoly

15.5%

Trucking (Quality Carriers)

Competitive

5.8%

Other Revenue (Rail/Ancillary)

Competitive

3.4%

ResMed Inc. segments

Full profile >

Sleep and Breathing Health

Oligopoly

87.5%

Residential Care Software

Competitive

12.5%

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.