Marti Gayrimenkul Yatirim Ortakligi AS engages in the investment, construction, and management of real estate properties. It operates hotels, residences, and lands in various regions of Turkey. The company was founded by Gültekin Kadirbeyoglu, Gün Gürbüz Kadirbeyoglu, Ömer Engin Baysal, Hasan Hayri Inönü, and Mehmet Kaya Baysal on June 12, 1987 and is headquartered in Istanbul, Turkey.