Aslan Çimento, which OYAK participated in 2009, was established as “Memalik-i Osmaniyye’de Sun’i Çimento ve Hidrolik Kireç İmalına Mahsus Arslan Osmanlı Anonim Şirketi” on December 20, 1910 and is the first cement plant of Turkey. The company, which manufactures various types of cement, has an annual grinding capacity of 3.3 million tons. The company also has a port used for export and import. Shares of the company are traded in BIST (Borsa Istanbul).
Aslan Çimento has an affiliate, Marmara Madencilik San ve Tic. Ltd. Şti.