Naftogaz of Ukraine is the largest national oil and gas company of Ukraine. It is a state-owned company subordinated to the Government of Ukraine. The vertical-integrated company carries out a complete cycle of exploration operations and development of deposits, operating and exploratory drilling, extraction, transportation, and refinement of natural gas and crude oil, supply of natural and liquefied gas to consumers.

The state-owned public joint stock company UkrGasVydobuvannya is the largest Ukrainian gas producer. It is a vertically integrated company with a complete production cycle: from exploration of gas and gas condensate reserves, field development, transportation, gas processing and condensate and oil refining to sales.