Today's large cap can quickly become tomorrow's small cap. What size is "small"? There are many definitions. Some people define a small public company as one with a market cap under $1 billion. Others define small cap as under $2 billion. And there are yet other definitions. Over the last two decades the word "small" has come to mean larger and larger companies! To confuse matters, NASDAQ's small cap market system continues to list truly small public companies, many of which would be classified as nano-cap by the definitions, below. Here are some current definitions from Investopedia and Investor Words. Market Cap Investopedia Investor Words Mega-Cap over $200 billion over $250 billion Large-Cap $10 billion - $200 billion. $5 billion - $250 billion Mid-Cap $2 billion - $10 billion $1 billion - $5 billion Small-Cap $300 million - $2 billion $250 million - $1 billion Micro-Cap $50 million - $300 million under 250 million Nano-Cap under $50 million -- Some T/A sites: http://www.americanbulls.com/ http://www.stockta.com/ http://www.stockconsultant.com./ A screener that may be useful: http://moneycentral.msn.com/investor/finder/deluxestockscreen.aspx?query=Institutional+Ownership+Up+.... http://www.secform4.com/index.php Please- No Pink Sheet Stocks on the board.