Kalyon Group is a Turkish conglomerate, with major interests in construction.

[2] In 2013, it was part of a joint venture which won the EUR 22 billion contract to construct a third international airport in Istanbul.

[3] Other contracts include Istanbul's Metrobus system, the construction of a new stadium for İstanbul Büyükşehir Belediyesi S.K.,[4] Karapınar solar power plant, and the redevelopment of Taksim Gezi Park to reconstruct the Taksim Military Barracks.

Kalyoncu was a close friend of the former President and Prime Minister Turgut Özal.

[3][4] Kalyon was described in 2013 by the BBC as "a company which has close ties with the governing Justice and Development (AK) Party".