Tekfen 

Tekfen Holding Anonim Sirketi, operating through its various subsidiary companies, is a multifaceted enterprise engaged in engineering and construction, chemical production, agricultural endeavors, diverse service provision, and investment activities. Its operations span both Turkey and global markets. The company's engineering and contracting arm undertakes a broad spectrum of projects, encompassing heavy industrial facilities like petrochemical plants, pipelines, land and marine terminals, offshore platforms, tank farms, oil refineries, pumping stations, and power generation units. It also constructs vital infrastructure, such as highways, subways, bridges, tunnels, electrical and instrumentation installations, and general urban development. Beyond infrastructure, its portfolio includes production facilities, commercial and technical building complexes, and sports arenas. In the agricultural domain, Tekfen manufactures and supplies mineral, specialized water-soluble, and organic/organomineral fertilizers. It further contributes to energy through biogas generation and its conversion into electricity. The company is also active in cultivating and distributing seedlings and saplings, alongside exporting fresh produce like cherries, apricots, pomegranates, plums, persimmons, and figs. Its comprehensive range of services extends to terminal management, maritime guidance and towage, agency services, free zone operations, insurance solutions, and the management of buildings and facilities. Established in 1956, Tekfen Holding Anonim Sirketi is based in Istanbul, Turkey.