GRK Infra 

GRK Infra Oyj provides infrastructure construction services in Finland, Sweden, and Estonia. The company's services include civil engineering, road construction, paving, electricity network construction, rail business, and environmental technology. It provides transport infrastructure; bridge construction work, such as waterway and railway bridges; area construction; concrete, steel and composite structures, foundations, industrial construction, bridge, tunnel and construction, and repair; excavation, shoring, and quarrying; systems and structures for railways; maintenance of tracks; and metro lines and trams, as well as designs, repairs, maintains, and builds roads, highways, tracks, and bridges. The company also offers track engineering, track electrification, and safety equipment; foundations to telecom tower structures; reception, processing, and utilization of waste materials and side streams; construction of sports facilities; production and sale of biochar and pellets; and transmission lines and substations, EPC deliveries, as well as wind, solar and battery energy storage systems. It serves state administration, municipalities, and cities, as well as the private sector. The company was incorporated in 1983 and is based in Vantaa, Finland.