VOL. XCIV, NO. 247
★ WIDE MOAT STOCKS COMPARISON ★
NO ADVICE
Thursday, January 1, 2026
Stock Comparison
W.W. Grainger, Inc. vs Marsh & McLennan Companies, Inc.
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
W.W. Grainger, Inc.
GWW · 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 W.W. Grainger, Inc.'s moat claims, evidence, and risks.
View GWW analysisMarsh & McLennan Companies, Inc.
MMC · 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 Marsh & McLennan Companies, Inc.'s moat claims, evidence, and risks.
View MMC analysisComparison highlights
- Moat score: both at 65 / 100.
- Segment focus: W.W. Grainger, Inc. has 3 segments (79.9% in High-Touch Solutions N.A.); Marsh & McLennan Companies, Inc. has 2 segments (62.8% in Risk and Insurance Services).
- Primary market structure: Competitive vs Oligopoly. Pricing power: Moderate vs Moderate.
- Moat breadth: W.W. Grainger, Inc. has 5 moat types across 2 domains; Marsh & McLennan Companies, Inc. has 5 across 3.
Primary market context
W.W. Grainger, Inc.
High-Touch Solutions N.A.
MRO (maintenance, repair and operations) products distribution and value-added inventory/procurement solutions
North America (U.S., Canada, Mexico, Puerto Rico)
Mid-size and large businesses with complex purchasing operations; also government and institutions
Distributor / wholesaler + onsite inventory services
79.9%
Marsh & McLennan Companies, Inc.
Risk and Insurance Services
Insurance brokerage, risk advisory, and reinsurance brokerage/services
Global
Enterprises, public entities, associations, and individuals (via broker/agent channels)
Intermediary + advisor (insurance/reinsurance market intermediary)
62.8%
Side-by-side metrics
Moat coverage
Shared moat types
W.W. Grainger, Inc. strengths
Marsh & McLennan Companies, Inc. strengths
Segment mix
W.W. Grainger, Inc. segments
Full profile >High-Touch Solutions N.A.
Competitive
Endless Assortment
Competitive
Other (Cromwell U.K. + captive insurance)
Competitive
Marsh & McLennan Companies, Inc. segments
Full profile >Risk and Insurance Services
Oligopoly
Consulting
Competitive
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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.