Koca İnşaat Sanayi ve İhracat Anonim Şirketi

The company is active in sub-structural and infrastructural construction projects requiring
advanced engineering solutions with special design and method of construction for
sophisticated projects such as dry docks, slipways, water intake, scale pits, railway crossing
vertical in-situ and precast shafts, caissons that are usually situated at the coastal line with poor soil conditions, requiring special soil improvement methods such as jet grouting, piling,
dewatering, sinking caissons etc.

Subenko Altyapı Mühendislik ve İnşaat Anonim Şirketi

The company is active in engineering design works, construction of various substructures, utility works, earthworks, infrastructures, heavy foundations, marine and coastal structures, industrial structures and soil improvement works.

Birce Turizm İnşaat ve Ticaret Anonim Şirketi

The company makes investments in touristic facilities.