OKKO is the network of filling complexes (gas stations) in Ukraine. The owner of OKKO network is open joint-stock company Concern Galnaftogaz.
In 2006 first two large OKKO route complexes – in Kalynivka village near Kiev and in Chop in Zakarpattya region – were opened. OKKO filling complex in Chop entered the Ukrainian book of records as the biggest filling complex in Ukraine by area and by the amount of services.
Today OKKO network consists of 391 modern filling complexes throughout Ukraine. 2 OKKO river filling stations – in Kiev and Nova Kakhovka, and one OKKO CNG station operate in the network.