Compremum. 

Compremum S.A., established in 1973 in Poznan, Poland, and formerly known as Pozbud T&R Spolka Akcyjna, is a diversified enterprise operating across various sectors in Europe. The company primarily manufactures and distributes a wide array of windows and doors, including wooden, wood-aluminum, and aluminum options, alongside patio, external, and terrace doors, and facade systems, all under its SLONAWY brand. Beyond its joinery production, Compremum offers extensive construction services. These include the development and installation of fiber-optic, water, and sewage networks; the construction of residential and commercial properties; and the refurbishment of railway infrastructure. The company also provides general contracting services and specialized installation for its door and window products. Furthermore, Compremum is actively involved in the railway industry, performing repairs and modernizations on passenger and freight cars, electric locomotives, and liquid fuel tanks. It also delivers technical consulting and maintenance for energy facilities. The company organizes its operations into distinct segments: Joinery, Construction Services, Development Services, Railway Industry, and Renewable Energy Sources.