National Joint Stock Company Naftogaz of Ukraine and its six subsidiaries – PJSC State Joint Stock Company Chornomornaftogaz, PJSC Ukrtransgaz, Subsidiary Company Likvo, PJSC Ukrgasvydobuvannya, PJSC Ukrtransnafta, Subsidiary Company Gaz Ukraiiny (hereinafter referred to as Naftogaz) initiated an arbitration proceeding against the Russian Federation (hereinafter referred to as the RF) under the Agreement between the Cabinet of Ministers of Ukraine and the Government of the Russian Federation on the Encouragement and Mutual Protection of Investments. In its application, Naftogaz complains of a violation of its rights under the Agreement in connection with the expropriation of its assets and the assets of its subsidiaries in Crimea.