Nice frankermel, I'll just add this for a little more clarity. The msg-26759975 below has more detail even yet.
in addition, as part of going public, the company grants 10% of the authorized shares to employees etc., but these people cannot sell their shares for six months. So after the IPO, 200,000 shares are publicly held, and the rest is in the company treasury. We say that the number of shares outstanding is 200,000. However, due to various restrictions placed on the employees, their share holdings cannot be traded. While the restriction on insiders (commonly called a lockup) is in force, just 100,000 shares are available for trading, so the float is 100,000 shares http://invest-faq.com/cbc/stock-outstanding.html
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