Allison Transmission Holdings, Inc. engages in the design and manufacture of vehicle propulsion solutions for commercial and defense vehicles. The company is headquartered in Indianapolis, Indiana and currently employs 3,500 full-time employees. The company went IPO on 2012-03-15. The firm is also a manufacturer of medium-and heavy-duty fully automatic transmissions. Its products are used in a variety of applications, including on-highway trucks, including distribution, refuse, construction, fire and emergency; buses, including school, transit and coach; motorhomes, off-highway vehicles, and equipment, including energy, mining and construction applications; and defense vehicles, including tactical wheeled and tracked. The firm operates in approximately 150 countries. The company has manufacturing facilities in the United States, Hungary and India, as well as global engineering resources, including electrification engineering centers in Indianapolis, Indiana, Auburn Hills, Michigan and London in the United Kingdom. The firm also has approximately 1,400 independent distributor and dealer locations worldwide.