Wärtsilä Oyj Abp engages in the power business. It operates through the following segments: Wärtsilä Marine Power, Wärtsilä Marine Systems, Wärtsilä Energy, and Wärtsilä Portfolio Business. The Wärtsilä Marine Power segment focuses on a comprehensive range of engine and propulsion solutions. The Wärtsilä Marine Systems segment consists of three end-to-end business units: Exhaust Treatment, Gas Solutions, and Shaft Line Solutions. The Wärtsilä Energy segment develops market technologies, including flexible power plants, energy management and storage systems, as well as lifecycle services that enable increased efficiency, and guaranteed performance. The Wärtsilä Portfolio Business segment refers to water and waste, marine electrical systems, and automation, navigation and control systems. The company was founded on April 12, 1834 and is headquartered in Helsinki, Finland.