What is market capitalization?
Market capitalization is the market value of a company's equity: the current share price multiplied by the total number of shares outstanding. It moves every trading day with the share price. Market cap values the equity alone. Debt and cash sit outside it, which is why buyers and analysts also look at enterprise value. Investors often group companies as small cap, mid cap or large cap by this measure.
Why it matters to a revenue leader
Market cap is the market's running estimate of what the business will earn in the future, and revenue growth and forecast reliability feed that estimate. When a company misses and cuts guidance, the fall in market value can be many times the revenue shortfall, as the example shows. For revenue leaders and sellers paid partly in stock, market cap is also part of their own pay.
How to calculate it
Market cap = share price × shares outstanding. A common mistake is using authorized shares, which include shares the company has not issued.
Example
Fictitious numbersA public facility services company has 80 million shares trading at $50, a market cap of $4 billion. After a quarter in which revenue misses by $10 million and guidance is cut, the shares fall 8% to $46. Market cap drops by $320 million, 32 times the revenue shortfall.
"Do my sellers understand how a forecast miss shows up in the value of the equity they hold?"
Sources
- Market Capitalization checked 9 Oct 2026
- Enterprise Value (EV) Formula and What It Means checked 9 Oct 2026