The formula
Market cap = share price × the number of shares outstanding (or the listed share count your data source uses). In other words, what buying every share at the current price would cost. It changes whenever the price changes.
Share price is not company size
Company A trades at EGP 150 with 5 million shares. Company B trades at only EGP 15 but has 200 million shares. Which is bigger?
A: 150 × 5 million = EGP 750 million. B: 15 × 200 million = 3,000 million, or 3 billion. The company with the cheaper share is four times bigger.
Large, mid and small
Companies are grouped by market cap. There is no single agreed official split; each source may draw its own lines, and the lines move as the market grows. In the FoudaLens stock screener, the filter is split like this:
Size tells you useful things: large companies' shares usually trade more, while small ones may trade in thin amounts. But that is not a rule, and every stock has its own circumstances.
Filter by size
Open the stock screener, choose a market-cap group, and see which companies fall into it.
Check yourself
1. Price EGP 40, 25 million shares. What is the market cap?
2. A share costs EGP 200. Can you say the company is large?
Summary
- Market cap = share price × number of shares.
- The price of one share says nothing about company size.
- The large, mid and small split differs from one source to another.