When people violate the law, we incarcerate them, i.e. restrict their movement. Corporate stock should be incarcerated (i.e. movement restricted i.e. can not be sold/traded) when corporations break the law.
Since people cannot work from prison, corporations should be equivalent: they may not conduct any business. But since people in prison are still responsible for things like rent, corporations should keep paying rent and salary too. Not sure if it's possible to get a friend corporation to do that for you though…