Westport Innovations Inc. is a provider of engine and fuel system technologies utilizing gaseous fuels. The Company operates through six segments: Westport Applied Technologies Business Unit, Westport On-Road Systems Business Unit, Westport Off-Road Systems Business Unit, Corporate and Technology Investments Business Unit, Cummins Westport Inc and Weichai Westport Inc. Westport Applied Technologies Business Unit designs, produces, and sells compressed natural gas and liquefied petroleum gas components and subsystems for natural gas vehicles. Westport On-Road Systems Business Unit engineers, designs, assemble and sell natural gas engine and vehicle systems. Westport Off-Road Systems Business Unit engineers, designs, and markets the Company's natural gas technologies. Cummins Westport serves the medium- to heavy-duty engine markets with spark ignited natural gas engines. Weichai Westport develops, manufactures, and sells advanced, alternative fuel engines and parts.