Sönmez Filament Sentetik Iplik ve Elyaf Sanayi AS engages in real estate activities. The company was founded by Ali Osman Sönmez, Mehmet Arda, Semih Sevilen, Vahdettin Akçinar, and Rüstü Gönden on April 14, 1972 and is headquartered in Bursa, Turkey.