When it comes to criminal offences, they are pretty much within the law, well except they can afford better lawyers so usually get away with minimum legally possible punishment.

Companies and the concept of limited liability exists to make innovation possible. No one will start a startup knowing they will have their house confiscated and go to prison if it fails. And, because majority of money businessmen make is the stock worth, company being insolvent and thus it's stock losing all value is in itself a punishment heavy enough for the founders.