YIT Oyj, operating under the symbol YITYY, is a comprehensive construction and development company headquartered in Helsinki, Finland, having been established in 1912. The firm provides a diverse range of construction services catering to residential customers, industrial clients, and the public sector. Its primary areas of operation include Finland, Sweden, Norway, Russia, the Czech Republic, Slovakia, Poland, and the Baltic countries, with additional international ventures. YIT's business activities are organized into five core segments: Housing Finland and CEE, Housing Russia, Business Premises, Infrastructure, and Partnership Properties. Its extensive portfolio covers the development and construction of apartments and entire residential areas, along with offering property management, maintenance, and various living-related services. The company also plays a role in renewable energy by developing wind power plants. For commercial and public entities, YIT constructs a variety of buildings, including corporate offices, retail and business premises, logistics centers, industrial facilities, and crucial public infrastructure such as hospitals, schools, and multi-purpose complexes. Specialized services include pipe renovation work for housing cooperatives. Furthermore, YIT is a key player in infrastructure development, building essential components like roads, bridges, railway and metro stations, ports, and parking facilities. It also constructs energy, water supply, and industrial plants. Beyond new construction, the company handles the maintenance of roads, streets, and green spaces, and offers expert services in tunnel quarrying, mining, and structural reinforcement. Additionally, YIT engages in broad property development initiatives.