American Airlines Group, Inc. is a holding company, which engages in the operation of a network carrier through its principal wholly-owned mainline operating subsidiary, American. The company is headquartered in Fort Worth, Texas and currently employs 132,800 full-time employees. The company went IPO on 2013-12-09. Its primary business activity is the operation of a network air carrier. The Company, together with its regional airline subsidiaries and third-party regional carriers, operates under the American Eagle brand, providing scheduled air transportation for passengers and cargo through its hubs in Charlotte, Chicago, Dallas/Fort Worth, Los Angeles, Miami, New York, Philadelphia, Phoenix and Washington, D.C. and partner gateways, including in London, Doha, Madrid, Seattle/Tacoma, Sydney and Tokyo. Its cargo division provides a range of freight and mail services, with facilities and interline connections available across the globe. Its subsidiaries include American Airlines, Inc., Envoy Aviation Group Inc., PSA Airlines, Inc. and Piedmont Airlines, Inc. The company operates approximately 965 mainline aircraft supported by its regional airline subsidiaries and third-party regional carriers, which together operated an additional 556 regional aircraft.