WILMINGTON, Del. - PMGI Holdings Inc., the parent company for the adult entertainment empire bearing the name "Penthouse," on Sept. 17 filed for Chapter 11 bankruptcy in the U.S. Bankruptcy Court for the District of Delaware, listing debts between $500 million and $1 billion (In Re: PMGI Holdings Inc., No. 13-12404, Chapter 11, D. Del. Bkcy.).