TransDigm Group Incorporated develops, distributes and manufactures commercial and military aerospace components, such as mechanical actuators and ignition systems. It is a Fortune 1000 company, and ranked as 650 in 2019 by Forbes. In 2019, following United States congressional hearings reported as "contentious", Transdigm agreed to return $16.1 million in overcharges to The Pentagon, without any admission of wrongdoing.