OJSC OC Rosneft is a vertically-integrated Russian oil and gas company with upstream and downstream operations in each of Russia's oil-producing regions. Headquartered in Moscow, Co. operates ten oil and gas producing enterprises across Russia and is involved in over ten exploration projects. In addition to its upstream operations, Co. also owns two refineries, which have a combined capacity of 10 million tons per year, as well as four main oil export terminals and a nationwide network of over 600 service stations. Co.'s downstream operations consist of its crude oil export structure, refining operations and nationwide network of marketing subsidiaries.

Sistema is a telecommunications and technology investment group based in Russia. Co. invests in, and manages a range of companies which operate in the telecommunications, oil and energy, high technology, banking and other sectors. The main focus of Co.'s activities is service-based industries. Co.'s operations are organized along four segments: Telecommunications, Technology and Industry, Consumer Assets and Oil and Energy. Through its subsidiaries, Co.'s activities include: wireless telecommunications services , IT and systems integration, cable TV, manufacturing of radiotechnical equipment, oil, gas and energy production, banking activities, trading and investing and financing activities.

Tatneft PJSC and its subsidiaries are engaged in crude oil exploration, development and production principally in the Republic of Tatarstan, Russia. Co. is a holding structure, which incorporates oil and gas production boards, crude oil and gas refining companies, as well as enterprises and servicing works selling the crude oil and also the products of crude oil and gas refining and petrochemical products. In addition to this, Co. is also participating in the banking and insurance activities. Co.'s operations are divided into the following main segments: Exploration and Production; Refining and Marketing; and Petrochemicals.