Global Yatirim Holding AS, formerly Global Menkul Degerler AS, is a Turkey-based investment holding company that participates in the shareholding structure of its subsidiaries, while providing management, finance and organizational services. It operates four principal business units which are established to conduct its activities in these sectors. The Port business unit operates through the direct and 77.9%-owned subsidiary, Global Ports Holding, as well as through its three indirect subsidiaries. The Energy business unit operates through the wholly owned company Global Energy, as well as through for indirect subsidiaries. The Real Estate business unit operates through the 50%-owned Pera REIT, as well as through other, indirectly held companies. The Finance business unit operates through the 75.67%-owned Global Securities and the 40%-owned AZ Global Asset Management.