aww, your mixing up terms, but no biggy...
Privately Held Corporations, are corporations owned by Enterprises, to make an existing corp private, it has to be sold to a CEO, by getting an enterprise to bid on it
Tomake a state or national corp an "Enterprise Controlled Public Corporations," requires the use of IPO's to sell the magority of the shares to a CEO.
Also, could you use the help forum for these questions?