As of February 1, 2018, Lemminkäinen Oyj was acquired by YIT Oyj. Lemminkäinen Oyj provides infrastructure and building construction services primarily in Finland, other Nordic countries, Russia, and the Baltic countries. The company engages in the construction of asphalt and paving, mineral aggregates, and post-tensioned structures; provision of waterproofing services; crushing, screening, and quarrying of mineral aggregates; treatment of contaminated soil; and maintenance and upkeep of roads and outdoor areas. It also offers residential, commercial, and industrial construction services; renovation services; and property development, commercial property and facilities management, and PPP model services. The company undertakes projects, such as road and street construction, bridges, railway track, earthworks and public utilities, hydraulic engineering, foundation engineering, and underground construction and excavation. It serves public-sector clients, construction companies, industry and property owners, private companies and consumers, residential and other property investors, developers, leaseholders, and owner-occupiers. Lemminkäinen Oyj was founded in 1910 and is headquartered in Helsinki, Finland.