I’ve said many times, Nazis are just communists with better tailors.
The difference between the National Socialists and the State Socialists was that the State Socialists would foolishly take over a business and parachute in some party flunkie who had no idea how to run it. The National Socialists by contrast were smart enough to leave the existing owners/managers in place - so long as they did what the government wanted them to do.
Profits would be strictly limited. The government would put out contracts for various military items that would take up just about all the productive capacity of the entire economy, but so long as you did what you were told the Nazis were content to sit back and let you figure out how to run the company. Needless to say, things ran much better with managers and owners who knew what the hell they were doing in the first place.
Make no mistake though....the government controlled and dominated the economy and if you tried to make products the Nazis didn’t approve of or were unwilling to produce the products they wanted, the best you could hope for was to have the government take over the company and throw you out. At worst, things could get much uglier than that for you.