VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Wednesday, December 31, 2025

Stock Comparison

Automatic Data Processing, Inc. vs American Tower Corporation

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

Automatic Data Processing, Inc.

ADP · NASDAQ

Market cap (USD)$105B
SectorTechnology
CountryUS
Data as of2025-12-30
Moat score
71/ 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 Automatic Data Processing, Inc.'s moat claims, evidence, and risks.

View ADP analysis

American Tower Corporation

AMT · New York Stock Exchange

Market cap (USD)
SectorReal Estate
CountryUS
Data as of2025-12-31
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 American Tower Corporation's moat claims, evidence, and risks.

View AMT analysis

Comparison highlights

  • Moat score gap: American Tower Corporation leads (76 / 100 vs 71 / 100 for Automatic Data Processing, Inc.).
  • Segment focus: Automatic Data Processing, Inc. has 2 segments (67.5% in Employer Services); American Tower Corporation has 3 segments.
  • Moat breadth: Automatic Data Processing, Inc. has 7 moat types across 4 domains; American Tower Corporation has 6 across 4.

Primary market context

Automatic Data Processing, Inc.

Employer Services

Market

Payroll processing and cloud HCM (HR, time, talent, tax, benefits) software and outsourcing

Geography

Global

Customer

Businesses (SMB to large enterprise)

Role

SaaS and managed services provider

Revenue share

67.5%

American Tower Corporation

U.S. & Canada Communications Sites

Market

Wireless communications site leasing (macro towers, rooftops and DAS)

Geography

United States and Canada

Customer

Wireless carriers and other tenants (broadcast, data, government/municipal)

Role

Independent owner/operator of communications real estate (towerco)

Side-by-side metrics

Automatic Data Processing, Inc.
American Tower Corporation
Ticker / Exchange
ADP - NASDAQ
AMT - New York Stock Exchange
Market cap (USD)
$105B
n/a
Sector
Technology
Real Estate
HQ country
US
US
Primary segment
Employer Services
U.S. & Canada Communications Sites
Market structure
Oligopoly
Oligopoly
Market share
16.7% (reported)
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
71 / 100
76 / 100
Moat domains
Demand, Legal, Supply, Financial
Demand, Legal, Supply, Network
Last update
2025-12-30
2025-12-31

Moat coverage

Shared moat types

Switching Costs General

Automatic Data Processing, Inc. strengths

Compliance AdvantageScale Economies Unit CostFloat PrepaymentRegulated Standards PipeSuite BundlingUnderwriting Risk Pooling

American Tower Corporation strengths

Long Term ContractsPermits Rights Of WayPhysical Network DensityInteroperability HubCapacity Moat

Segment mix

Automatic Data Processing, Inc. segments

Full profile >

Employer Services

Oligopoly

67.5%

Professional Employer Organization (PEO) Services

Competitive

32.5%

American Tower Corporation segments

Full profile >

U.S. & Canada Communications Sites

Oligopoly

n/a

International Communications Sites

Oligopoly

n/a

Data Centers

Competitive

n/a

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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.