Ostim Endustriyel Yatirimlar ve Isletme AS (IBSE:OSTIM) agreed to acquire 50% stake in Gayrimenkul Enerji Elekt. Üretim Tic. AS from Tefirom Tevfik Oz ve Serpil OZ for TRY 0.05 million on December 25, 2015. In a related transaction, Ostim Endustriyel Yatirimlar ve Isletme AS (IBSE:OSTIM) acquired OFIM Business Centre from Tefirom Tevfik Oz ve Serpil OZ for TRY 15.2 million. Ostim Endüstriyel Yatirimlar ve Isletme A.S. (IBSE:OSTIM) cancelled the acquisition of 50% stake in Gayrimenkul Enerji Elekt. Üretim Tic. AS from Tefirom Tevfik Oz ve Serpil OZ on December 25, 2016.