Yes, and under the info on this site, that seems to indicate that they also own the others as well.

Is Frontier a separate entity at this time? The info page seems to indicate a lot of airplanes are on order by RAH.

Also, what's it like there? The other Frontier thread has about one useful post every three or four pages with most of the content focused on who is worthy to apply and what is or is not a major airline.

Looking for real information, not just an insult slinging match.