AAR Corp. is an American provider of aircraft maintenance services to commercial and government customers worldwide. The company is headquartered in Wood Dale, Illinois, a Chicago suburb. The company employs about 6,000 people, operating in about 30 different countries. John Holmes is the current CEO. During the first Trump administration, AAR quadrupled its lobbying expenditures. The company spent large sums at Trump-owned properties with the intent to get Trump to view the company more favorably. From the time Trump took office until October 2020, AAR obtained 10 new federal contracts worth a total of $1.35 billion. In December 2024, AAR paid a $55 million settlement in relation to an investigation by the U.S. Justice Department and SEC over schemes to bribe Nepalese and South African officials. AAR sells both new and used parts and is one of the largest in the world for selling used parts. AAR has about $2.5 billion in revenue as of 2024. As of January 2026, the company operates major maintenance facilities in Greensboro, North Carolina, Indianapolis, Lake City, Miami, Oklahoma City, and Rockford, Illinois as well as Trois Rivieres, Quebec and Windsor, Ontario in Canada. Wikipedia