This may be a dumb question, but what is the definition of a sub-llc? Is there a difference between a Limited Liability Company and a sub-llc? In my research of the prop industry, I keep coming across forums stating that the firm is a sub-llc... so I would just like some clarification. If a firm is connected to another company, such as a broker-dealer, does that in any way contribute to this "sub" definition (considering it may be an affiliate)? In the prop business, I would imagine that if a prop firm is associated/affiliated to other well established companies, that should make it more legitimate (in most places). Is this kind of thinking correct?