Atlas Air Worldwide Holdings, Inc. is a holding company. The Company provides outsourced aircraft and aviation operating services throughout the world, serving Africa, Asia, Australia, Europe, the Middle East, North America and South America through contractual service arrangements, including those through which it provides aircraft to customers and value-added services, including crew, maintenance and insurance (ACMI), as well as those through which it provides crew, maintenance and insurance, but not the aircraft (CMI); cargo and passenger charter services (Charter), and dry leasing aircraft and engines (Dry Leasing). The Company's segments include ACMI, Charter and Dry Leasing. The Company operates a fleet of about 749 freighters and provides customers a range of 747, 777, 767, 757 and 737 aircraft for domestic, regional and international cargo and passenger applications. Its subsidiaries include Atlas Air, Inc. (Atlas) and Southern Air, Inc. (Southern Air).