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 4,000 full-time employees. The company went IPO on 2012-03-15. The firm operates through two business units: Allison Transmission and Allison Off-Highway Drive & Motion Systems. The firm manufactures solutions which offer value propositions across vital sectors such as infrastructure, mining, energy, agriculture, construction, transportation and national security. Its transmission model products include 1000 Series + 2000 Series, 9-Speed, 3000 Series, 4000 Series, 6000 Series, 8000 Series, 9000 Series, FracTran, and X Models. Its electric + hybrid model products include eGen Flex, eGen Force, and eGen Power. Allison Off-Highway Drive & Motion Systems specializes in powertrain technologies, encompassing axles, propulsion solutions and drivetrain components. The company specializes in hybrid and electric drive systems tailored to customer needs. The firm has a global presence by serving customers in North America, Asia, Europe, South America, and Africa.