I have a clothing company and a brand of clothing. I want to start a music company as well. Should I umbrella all my companies under one name?
Trying to figure out if I should LLC three different businesses under one umbrella or leave them as separate entities.
No. That's technically wrong. Usually, the holding company has a group of companies doing different projects in the same industry; think of it like alphabet i.e. a tech company holding a brand called Google which is doing activity in IT as well.
Music does not have anything to do with clothing. The better way is to leave them separate.