Just a follow up. To be as rich Buffet and Gate. he has to hold the stock. Business takes some time to reach maturity and max profit most is going to be seen in the stock price. Second point DOC started this for a lot of reasons but handing over to his heir has to be on the list.3rd like I said before owns 55% of the common now would not control the company if he owns less than 51%
finally
If he sells the stock, he won't own the company anymore never mind controlling it.. He might sell a few but like Mikey said Doc worked many years just to profit a penny per share. That can't be the case he is smart that would be a retard move