VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Sunday, January 11, 2026

Wide Moat StocksExpansion-Stage Stocks Home My Collections

Stock Comparison

American Tower Corporation vs Fiserv, Inc.

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

American Tower Corporation

AMT · New York Stock Exchange

Market cap (USD)$78.9B
Gross margin (TTM)74.6%
Operating margin (TTM)45.9%
Net margin (TTM)28.1%
SectorReal Estate
IndustryREIT - Specialty
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

Fiserv, Inc.

FISV · NASDAQ

Market cap (USD)$37.7B
Gross margin (TTM)—
Operating margin (TTM)—
Net margin (TTM)—
SectorFinancials
Industry—
CountryUS
Data as of2026-01-10
Moat score
67/ 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 Fiserv, Inc.'s moat claims, evidence, and risks.

View FISV analysis

Comparison highlights

  • Moat score gap: American Tower Corporation leads (76 / 100 vs 67 / 100 for Fiserv, Inc.).
  • Segment focus: American Tower Corporation has 3 segments; Fiserv, Inc. has 2 segments (50.4% in Merchant).
  • Moat breadth: American Tower Corporation has 6 moat types across 4 domains; Fiserv, Inc. has 6 across 3.

Primary market context

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)

Fiserv, Inc.

Merchant

Market

Merchant acquiring and commerce enablement (SMB + enterprise omnichannel payments, POS, gateway/orchestration, and related software)

Geography

Global

Customer

Merchants (SMB and enterprise), plus channel partners (ISVs/ISOs/financial institutions) that serve or refer merchants

Role

Merchant acquirer / payment processor / commerce and POS platform provider

Revenue share

50.4%

Side-by-side metrics

American Tower Corporation
Fiserv, Inc.
Ticker / Exchange
AMT - New York Stock Exchange
FISV - NASDAQ
Market cap (USD)
$78.9B
$37.7B
Gross margin (TTM)
74.6%
n/a
Operating margin (TTM)
45.9%
n/a
Net margin (TTM)
28.1%
n/a
Sector
Real Estate
Financials
Industry
REIT - Specialty
n/a
HQ country
US
US
Primary segment
U.S. & Canada Communications Sites
Merchant
Market structure
Oligopoly
Oligopoly
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Moderate
Moderate
Moat score
76 / 100
67 / 100
Moat domains
Demand, Legal, Supply, Network
Network, Supply, Demand
Last update
2025-12-31
2026-01-10

Moat coverage

Shared moat types

No overlap yet.

American Tower Corporation strengths

Long Term ContractsPermits Rights Of WayPhysical Network DensitySwitching Costs GeneralInteroperability HubCapacity Moat

Fiserv, Inc. strengths

Ecosystem ComplementsDistribution ControlScale Economies Unit CostTraining Org Change CostsTwo Sided NetworkSuite Bundling

Segment mix

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

Fiserv, Inc. segments

Full profile >

Merchant

Oligopoly

50.4%

Financial

Oligopoly

49.6%

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.