Mayis Gayrimenkul Taahhüt Insaat Sanayi ve Ticaret Ltd. agreed to acquire 56.1% stake in Dogusan Boru Sanayii ve Ticaret A.S. (IBSE:DOGUB) from Iller Bankasi Genel Müdürlügü on December 6, 2012. The Competition Commission of Turkey approved the transaction. Mayis Gayrimenkul Taahhüt Insaat Sanayi ve Ticaret Ltd. cancelled the acquisition of 56.1% stake in Dogusan Boru Sanayii ve Ticaret A.S. (IBSE:DOGUB) from Iller Bankasi Genel Müdürlügü on June 23, 2016.