Current value of the Stock x Total Shares of Stock Issued = Market Capitalization
- Mega-cap: Market cap of $200 billion and greater10
- Big-cap: $10 billion and greater, up to $200 billion
- Mid-cap: $2 billion to $10 billion
- Small-cap: $250 million to $2 billion1
- Micro-cap: $50 million to $250 million
- Nano-cap: Under $50 million11