VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, December 31, 2025

Stock Comparison

IDEX Corporation vs Marsh & McLennan Companies, Inc.

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

IDEX Corporation

IEX · New York Stock Exchange

Market cap (USD)$13.4B
SectorIndustrials
CountryUS
Data as of2025-12-23
Moat score
58/ 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 IDEX Corporation's moat claims, evidence, and risks.

View IEX analysis

Marsh & McLennan Companies, Inc.

MMC · New York Stock Exchange

Market cap (USD)
SectorFinancials
CountryUS
Data as of2025-12-31
Moat score
65/ 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 Marsh & McLennan Companies, Inc.'s moat claims, evidence, and risks.

View MMC analysis

Comparison highlights

  • Moat score gap: Marsh & McLennan Companies, Inc. leads (65 / 100 vs 58 / 100 for IDEX Corporation).
  • Segment focus: IDEX Corporation has 3 segments (39.6% in Health & Science Technologies (HST)); 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: IDEX Corporation has 7 moat types across 3 domains; Marsh & McLennan Companies, Inc. has 5 across 3.

Primary market context

IDEX Corporation

Health & Science Technologies (HST)

Market

Precision fluidics, optics/photonics, microfluidics, sealing solutions, pneumatic components, and process technologies for life science/diagnostics, semiconductor, aerospace/defense, and industrial markets

Geography

Global

Customer

Life science & diagnostic instrument OEMs, semiconductor/industrial OEMs, specialty industrial customers

Role

Component/subsystem supplier and specialty equipment provider

Revenue share

39.6%

Marsh & McLennan Companies, Inc.

Risk and Insurance Services

Market

Insurance brokerage, risk advisory, and reinsurance brokerage/services

Geography

Global

Customer

Enterprises, public entities, associations, and individuals (via broker/agent channels)

Role

Intermediary + advisor (insurance/reinsurance market intermediary)

Revenue share

62.8%

Side-by-side metrics

IDEX Corporation
Marsh & McLennan Companies, Inc.
Ticker / Exchange
IEX - New York Stock Exchange
MMC - New York Stock Exchange
Market cap (USD)
$13.4B
n/a
Sector
Industrials
Financials
HQ country
US
US
Primary segment
Health & Science Technologies (HST)
Risk and Insurance Services
Market structure
Competitive
Oligopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
58 / 100
65 / 100
Moat domains
Demand, Supply, Legal
Supply, Demand, Legal
Last update
2025-12-23
2025-12-31

Moat coverage

Shared moat types

Data Workflow LockinBrand Trust

IDEX Corporation strengths

Design In QualificationInstalled Base ConsumablesLearning Curve YieldIP Choke PointProcurement Inertia

Marsh & McLennan Companies, Inc. strengths

Service Field NetworkSwitching Costs GeneralCompliance Advantage

Segment mix

IDEX Corporation segments

Full profile >

Fluid & Metering Technologies (FMT)

Competitive

37.7%

Health & Science Technologies (HST)

Competitive

39.6%

Fire & Safety/Diversified Products (FSDP)

Competitive

22.7%

Marsh & McLennan Companies, Inc. segments

Full profile >

Risk and Insurance Services

Oligopoly

62.8%

Consulting

Competitive

37.2%

Want the full wide moat stocks list?

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

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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.