VOL. XCIV, NO. 247

★ WIDE MOAT STOCKS COMPARISON ★

NO ADVICE

Thursday, January 8, 2026

Stock Comparison

Costco Wholesale Corporation vs Pool Corporation

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

Costco Wholesale Corporation

COST · Nasdaq Global Select Market

Market cap (USD)$388.7B
Gross margin (TTM)12.9%
Operating margin (TTM)3.8%
Net margin (TTM)3%
SectorConsumer
IndustryDiscount Stores
CountryUS
Data as of2025-12-21
Moat score
80/ 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 Costco Wholesale Corporation's moat claims, evidence, and risks.

View COST analysis

Pool Corporation

POOL · NASDAQ

Market cap (USD)$8.8B
Gross margin (TTM)29.6%
Operating margin (TTM)11.1%
Net margin (TTM)7.8%
SectorIndustrials
IndustryIndustrial - Distribution
CountryUS
Data as of2026-01-06
Moat score
56/ 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 Pool Corporation's moat claims, evidence, and risks.

View POOL analysis

Comparison highlights

  • Moat score gap: Costco Wholesale Corporation leads (80 / 100 vs 56 / 100 for Pool Corporation).
  • Segment focus: Costco Wholesale Corporation has 2 segments (98.1% in Warehouse club retail); Pool Corporation has 1 segment (100% in Wholesale distribution (pool, irrigation, outdoor living)).
  • Primary market structure: Oligopoly vs Competitive. Pricing power: Weak vs Weak.
  • Moat breadth: Costco Wholesale Corporation has 6 moat types across 3 domains; Pool Corporation has 5 across 2.

Primary market context

Costco Wholesale Corporation

Warehouse club retail

Market

Membership warehouse club retail (warehouse clubs, ancillary services, and e-commerce)

Geography

Global

Customer

Households and small businesses

Role

Retailer (membership club)

Revenue share

98.1%

Pool Corporation

Wholesale distribution (pool, irrigation, outdoor living)

Market

Wholesale distribution of swimming pool, irrigation/landscape, and related outdoor living products

Geography

North America (majority), with operations in Europe and Australia

Customer

Pool builders/remodelers, pool service/repair professionals, specialty pool retailers, irrigation/landscape contractors, commercial pool operators

Role

Distributor / wholesaler

Revenue share

100%

Side-by-side metrics

Costco Wholesale Corporation
Pool Corporation
Ticker / Exchange
COST - Nasdaq Global Select Market
POOL - NASDAQ
Market cap (USD)
$388.7B
$8.8B
Gross margin (TTM)
12.9%
29.6%
Operating margin (TTM)
3.8%
11.1%
Net margin (TTM)
3%
7.8%
Sector
Consumer
Industrials
Industry
Discount Stores
Industrial - Distribution
HQ country
US
US
Primary segment
Warehouse club retail
Wholesale distribution (pool, irrigation, outdoor living)
Market structure
Oligopoly
Competitive
Market share
n/a
n/a
HHI estimate
n/a
n/a
Pricing power
Weak
Weak
Moat score
80 / 100
56 / 100
Moat domains
Supply, Financial, Demand
Supply, Demand
Last update
2025-12-21
2026-01-06

Moat coverage

Shared moat types

Scale Economies Unit Cost

Costco Wholesale Corporation strengths

Operational ExcellenceNegative Working CapitalBrand TrustHabit DefaultFloat Prepayment

Pool Corporation strengths

Physical Network DensityScope EconomiesProcurement InertiaData Workflow Lockin

Segment mix

Costco Wholesale Corporation segments

Full profile >

Warehouse club retail

Oligopoly

98.1%

Membership fees (subscription)

Oligopoly

1.9%

Pool Corporation segments

Full profile >

Wholesale distribution (pool, irrigation, outdoor living)

Competitive

100%

Want the full wide moat stocks list?

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Proven models entering the expansion stage with unit economics that work.

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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.