*the stock is held by a small group of owners and many employees. Transfers are limited by contract and by securities laws. Because of the large number of shareholders, the company does have to file periodic reports with the SEC but the shares are not listed on an exchange and not available to the public. See http://en.wikipedia.org/wiki/Publix#Publix_stock
unfortunately most of your funding will be from VC companies, and it's unlikely they will give you money under a profit sharing arrangement b/c it does follow their IPO->cash out workflow.
The current system is flawed and self perpetuating