Costco Wholesale (COST) Market Cap 1986–2025

As of December 11, 2025, Costco Wholesale had a market cap of $391.980 billion, which increased by 1.15% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Dec 11, 2025, 4:00 PM ET
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Costco Wholesale Corp. (COST)

🌍 United States 📈 NASDAQ 🏭 Consumer Defensive 🏢 Consumer Staples Distribution & Retail
Latest Market Cap
$391.980B ▲ 1.15%
Jan 1, 2025
$406.732B ▼ 3.63%
1 Year Ago
$438.746B ▼ 10.66%
All-Time High
$478.020B ▼ 18.00%


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Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.


📈 Costco Wholesale Market Cap History by Year and Month

Costco Wholesale Market Cap History by Year and Month
Year / MonthMarket Cap% Change
2025$391.980B▼ 3.63%
$391.980B▼ 3.19%
$404.880B▲ 0.23%
$403.940B▼ 1.54%
$410.270B▼ 1.93%
$418.340B▲ 0.39%
$416.710B▼ 5.08%
$439.020B▼ 4.83%
$461.300B▲ 4.55%
$441.240B▲ 5.15%
$419.630B▼ 9.82%
$465.300B▲ 6.97%
$434.970B▲ 6.94%
2024$406.732B▲ 38.87%
2023$292.897B▲ 44.60%
2022$202.563B▼ 19.53%
2021$251.735B▲ 50.83%

All market cap values reflect closing prices for the period shown.


📊 Costco Wholesale Market Cap and Other Industry Peers

Below are selected companies from the Consumer Defensive sector / subsector:

  1. $920.71B
  2. $391.98B
  3. $328.92B
  4. $297.28B
  5. $234.97B
  6. $203.79B
  7. $98.57B
  8. $70.82B
  9. $69.41B
  10. $62.27B
  11. $43.91B
  12. $40.04B
  13. $40.02B
  14. $39.94B
  15. $38.04B
  16. $35.55B
  17. $29.21B
  18. $25.84B
  19. $20.12B
  20. $17.14B

Data reflect the most recent market capitalization values available.

💡 What Is Market Capitalization and How Do We Calculate It?

For Costco Wholesale Corp. (COST), market capitalization represents the total market value of the company’s publicly traded shares. It helps investors understand Costco Wholesale’s size within the consumer defensive sector and compare it with other companies in the same industry.

In most cases, market capitalization is calculated by multiplying the current share price by the number of basic shares outstanding. Basic shares represent the actual number of common shares that currently exist, without including potential future shares from employee stock options, RSUs, warrants, or convertible securities. For example, if Costco Wholesale had one million basic shares and each traded at $50, its market capitalization would be $50 million.

Formula:
Market Cap = Share Price × Shares Outstanding

The value of Costco Wholesale’s market capitalization changes throughout the trading day because it mainly depends on the current share price. The number of shares outstanding typically remains stable unless the company issues new shares, buys back its own stock, or grants stock options to employees.

Based on the latest data, Costco Wholesale had a market capitalization of $391.980 billion, placing it in the mega-cap category within the consumer defensive industry.

Disclaimer: Despite all efforts, there may still be minor inaccuracies present in the data.