Allison Transmission Holdings, Inc. is the world's largest manufacturer of fully automatic transmissions for medium- and heavy-duty commercial vehicles and defense applications, with a expanded product portfolio encompassing drivetrain, motion and propulsion solutions for on-highway, off-highway industrial, and military markets. The company generates revenue primarily through original equipment manufacturer supply agreements for transmissions and related components, complemented by a stable aftermarket business in service parts, transmission fluids and remanufactured solutions. Allison serves North American trucking, transit and bus operators, global construction and mining companies, and U.S. military vehicle programs across approximately 1,500 independent distributor and dealer locations worldwide, competing on product performance, reliability, fuel efficiency and an established service network.