The airline's parent company – New ATA Holdings, Inc. (the successor to ATA Holdings Inc., which was also once known as Amtran) – later changed its name to Global Aero Logistics, Inc. and purchased World Air Holdings, Inc. for $315 million in an all-cash transaction with the financial backing of the investment firm, MatlinPatterson. World Air Holdings, Inc. owned and operated North American Airlines and World Airways as two separate US-certified air carriers. ATA was North America's largest charter airline, and until its shutdown transported more troops for the United States military than any other commercial airline.