ATSG is a diversified aviation services company that traces its origins to Airborne Express, founded in 1980. Following DHL's 2003 acquisition of Airborne's freight operations, the airline and aircraft maintenance operations were retained under a newly formed holding company, Air Transport Services Group, which has since systematically expanded its portfolio across multiple aviation sectors.
The company operates as the world's largest freighter lessor and a global leader in midsize freighter leasing and ACMI (Aircraft, Crew, Maintenance, and Insurance) services. Its portfolio encompasses Cargo Aircraft Management, the largest global lessor of Boeing 767 freighters; three airline subsidiaries - ABX Air, Air Transport International, and Omni Air International; and specialized services spanning aircraft maintenance, pilot and crew training, aircraft conversions, and logistics. ATSG operates a fleet of over 100 in-service aircraft and employs approximately 5,300 people globally.
The company serves the air cargo and express freight sectors, providing both asset leasing solutions and operational airline services. Its integrated model combines aircraft ownership, crew provision, maintenance capabilities, and logistical support, positioning it to serve freight operators across different scales and service requirements.