$5mm or 5mm shares both look like big numbers to me!  

We should soon know if these comments are true as the SEC has a rule:

Beneficial ownership reports

If your company has registered a class of its equity securities under the Exchange Act, shareholders who acquire more than 5% of the outstanding shares of that class must file beneficial owner reports on Schedule 13D or 13G until their holdings drop below 5%. These filings contain background information about the shareholders who file them as well as their investment intentions, providing investors and the company with information about accumulations of securities that may potentially change or influence company management and policies.