Allison Transmission Holdings, Inc. operates as a premier manufacturer of fully automatic transmissions and electrified propulsion systems for medium- and heavy-duty commercial and defense vehicles. The company's business model centers on providing highly engineered, durable, and reliable propulsion solutions that optimize performance across diverse vocations. Allison's revenue is primarily generated from the North American On-Highway market, which accounts for the majority of its sales, alongside significant contributions from Defense, Off-Highway (energy, mining, and construction), and Outside North America On-Highway segments. The company also derives substantial recurring revenue from its aftermarket business, which includes Allison-branded service parts, transmission fluids, and remanufactured transmissions sold through a global network of approximately 1,400 independent distributor and dealer locations. Geographically, while North America is its largest market (generating over 75% of revenues), Allison maintains a strong global footprint with manufacturing facilities in the United States, India, and Hungary, serving customers across more than 150 countries. Competitively, Allison holds a dominant market share in the fully automatic transmission space for commercial vehicles, leveraging its century-long heritage, technological leadership, and strong brand recognition to maintain its position against rivals in the commercial vehicle and defense sectors.