Costco Wholesale Corporation Market Cap
Data as of June 01, 2026
Market Cap
$424.27B
Stock Price
$956.32
Shares Outstanding
$444M
Classification
Mega Cap
How It's Calculated
$424.27B = $956.32 × $444M
What This Means
Costco Wholesale Corporation has a market capitalization of $424.27B, classifying it as Mega Cap — one of the largest companies in the world. Market cap represents the total value of all outstanding shares and is a key indicator of a company's size.
About Costco Wholesale Corporation
Costco Wholesale Corporation (COST) operates in the Consumer Defensive sector, specifically in Discount Stores. With a market capitalization of about $424.27B, it ranks as a mega-cap stock — one of the largest publicly traded companies.
Shares recently traded near $956.32, within a 52-week range of $844.06 to $1096.50 (-12.8% from the high, +13.3% from the low). Beta of 0.91 is broadly in line with typical market sensitivity.
Trailing profit margin is about 3.0%, signaling modest profitability that investors should weigh against growth plans.
Understanding This Metric
Market capitalization sums the market value of all outstanding shares. It helps classify Costco Wholesale Corporation by size — mega-cap, large-cap, and mid-cap stocks tend to have different liquidity, volatility, and index inclusion profiles. Size alone does not determine quality, but it frames risk and how widely the stock is held.
Sector Comparison
Among Consumer Defensive names on our S&P 100 coverage, Costco Wholesale Corporation's market cap of $424.27B can be compared with peers such as WMT ($922.64B), KO ($339.94B), PG ($334.29B). Sector context helps interpretation, but each company's growth profile and balance sheet differ — use multiple metrics before drawing conclusions. View all Consumer Defensive stocks.
Key Takeaways
- COST is grouped in the Consumer Defensive sector for peer comparisons.
- Recent beta of 0.91 suggests market-like price sensitivity.
- Trailing profit margin of 3.0% provides context for how much earnings support the headline multiple.
Related Tools & Guides
Explore calculators and guides connected to this metric, or view all metrics for COST.
Calculated Market Cap
$424.27B
Sector
Consumer Defensive
Other COST Metrics
Frequently Asked Questions
What is COST's market capitalization?
Market cap is the total market value of all outstanding shares. Costco Wholesale Corporation's market cap is about $424.27B on this page's data date.
Is COST a mega/large/mid/small cap?
With roughly $424.27B in market cap, Costco Wholesale Corporation falls in the mega-cap category in our size buckets (mega ≥$200B, large ≥$10B, mid ≥$2B). Size affects liquidity, index weight, and typical volatility.
How does market cap relate to COST's risk profile?
Larger caps tend to have broader analyst coverage and deeper trading; smaller caps can offer growth but with higher idiosyncratic risk. Use market cap together with debt, cash flow, and Consumer Defensive position — not alone.
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