The basic calculation
Market capitalization is the current share price multiplied by the number of shares outstanding. It describes the market value of a company’s outstanding equity, rather than the price of one share.
A hypothetical comparison
Company A trades at $1 with 100 million shares outstanding. Its market capitalization is $100 million. Company B trades at $10 with 5 million shares outstanding. Its market capitalization is $50 million. In this example, the lower-priced stock represents the larger equity market value. These are invented numbers used only to explain the calculation.
Company size is not a valuation verdict
Market capitalization does not tell you whether a stock is a bargain. It is not the same as the company’s cash, revenue, profit or accounting book value. Those measures answer different questions. Read the financial statements and consider the business alongside its market value.
Check the share-count date
A share count taken from an older report may not reflect a later financing or corporate action. Match the date of the share count to the question you are trying to answer, and read newer filings for changes.
Source review
- SEC Investor.gov — Market Capitalization
- FINRA — Defining the Value of an Investment
- SEC Investor.gov — Using EDGAR to Research Investments
Sources reviewed October 22, 2026. This guide is general education, not personalized investment advice or a recommendation to buy or sell any security.