Wärtsilä Oyj Abp engages in the power business. It operates through the following segments: Wärtsilä Marine Power, Wärtsilä Marine Systems, Wärtsilä Voyage, Wärtsilä Energy, and Wärtsilä Portfolio Business. The Wärtsilä Marine Power segment focuses on comprehensive range of engine and propulsion solutions. The Wärtsilä Marine Systems segment consists of four end-to-end business units: Exhaust Treatment, Gas Solutions, Marine Electrical Systems, and Shaft Line Solutions. The Wärtsilä Voyage segment leverages the latest digital technologies to deliver a step-change in safety, efficiency, reliability, and emissions. The Wärtsilä Energy segment comprises flexible power plants, energy management, storage systems, and lifecycle services that enable increased efficiency and guaranteed performance. The Wärtsilä Portfolio Business segment involves multiple business units, which are run independently with the aim of accelerating performance improvement and unlocking value through divestments or other strategic alternatives. The company was founded on April 12, 1834 and is headquartered in Helsinki, Finland.