VOL. XCIV, NO. 247
★ WIDE MOAT STOCKS COMPARISON ★
NO ADVICE
Wednesday, December 31, 2025
Stock Comparison
HEICO Corporation vs Merck & Co., Inc.
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
HEICO Corporation
HEI · NYSE
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into HEICO Corporation's moat claims, evidence, and risks.
View HEI analysisMerck & Co., Inc.
MRK · New York Stock Exchange
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into Merck & Co., Inc.'s moat claims, evidence, and risks.
View MRK analysisComparison highlights
- Moat score gap: HEICO Corporation leads (77 / 100 vs 71 / 100 for Merck & Co., Inc.).
- Segment focus: HEICO Corporation has 2 segments (69.5% in Flight Support Group (FSG)); Merck & Co., Inc. has 2 segments (89.5% in Pharmaceutical).
- Primary market structure: Oligopoly vs Competitive. Pricing power: Moderate vs Moderate.
- Moat breadth: HEICO Corporation has 6 moat types across 3 domains; Merck & Co., Inc. has 5 across 3.
Primary market context
HEICO Corporation
Flight Support Group (FSG)
Aerospace aftermarket replacement parts and MRO services (jet engine and aircraft components), including FAA-approved PMA parts
Global
Commercial airlines, cargo carriers, MROs, OEMs, and government/military customers
Aftermarket parts manufacturer + MRO/repair provider + distributor
69.5%
Merck & Co., Inc.
Pharmaceutical
Branded prescription pharmaceuticals & human vaccines
Global
Wholesalers/retailers, managed care and government payers, hospitals/clinics
R&D-intensive innovator, manufacturer, and marketer
89.5%
Side-by-side metrics
Moat coverage
Shared moat types
HEICO Corporation strengths
Merck & Co., Inc. strengths
Segment mix
HEICO Corporation segments
Full profile >Flight Support Group (FSG)
Oligopoly
Electronic Technologies Group (ETG)
Oligopoly
Merck & Co., Inc. segments
Full profile >Pharmaceutical
Competitive
Animal Health
Oligopoly
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View the moat stocks listCuration & 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.