ANK Bashneft' PAO, formerly ANK Bashneft' OAO is a Russia-based company, which is active within the oil and gas industry. Its principal activities include the extraction, exploration and production of crude oil and oil products. The Company operates through a number of branches and subsidiaries, including network of gas filling stations. In addition, it operates various fields, such as Yangareiskoe and Sabriyaginskoe located in the Nenetsk regions. ANK Bashneft' OAO sells its products on the domestic market, as well as abroad. In July 2013, it completed the consolidation of petrochemical assets within United Petrochemical Company (UPC). In December 2013, it acquired LLC Bashneftegazrazvedka. In February 2014, it consolidated 100 % in Bashneft Trading AG. In March 2014, it acquired LLC Burneftegaz. In August 2014, the Company acquired OPTAN network of filling stations.

Gazprom Neft PJSC is vertically integrated oil company operating in the Russian Federation, CIS and internationally. Co.'s principal activities include exploration, production and development of crude oil and gas, production of refined petroleum products and distribution and market ing operations through its retail outlets. Co.'s Upstream segment includes the exploration, development and production of crude oil and natural gas (including joint ventures results), oil field services. Co.'s Downstream segment processes crude into refined products and purchases and sells and transports crude and refined petroleum products (refining and marketing).

PJSC Gazprom is a gas company based in Russia. Co.'s principal activity is the sale of gas. Co. is also involved in other types of activities which include leasing of assets, gas transportation and storage services, sale of gas condensate and refined products. Co. and its subsidiaries and associates operates gas pipelines systems in Russia. Co. is responsible for substantially all gas production and high pressure gas transportation in the Russian Federation. Co. is also a major exporter of gas to European countries. Co. is directly involved in exploration and drilling for hydrocarbons, production of gas and other hydrocarbons and domestic and export sale of gas and other hydrocarbons.

PJSC Lukoil is a vertically-integrated oil company engaged in the exploration and production of crude oil and natural gas. Co. is engaged in all main sectors of the modern oil business including supplies, refining, marketing, transportation, petrochemicals and oil-related activities. Co.'s operations are divided into five business segments: Exploration and Production; Refining, Marketing and Distribution; Chemicals; Power Generation and Other Business Segments. Co. owns and operates refineries in Bulgaria (LUKOIL Neftochim Bourgas AD) and Romania (Petrotel-LUKOIL).

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.

Surgutneftegaz is vertically integrated oil company based in Russia. Co.'s activities include prospecting and exploration of hydrocarbons, oil and oil and- gas fields development and construction; oil products and petrochemicals manufacturing and marketing; power generation; gas processing and gas products marketing. Co.'s operations expand beyond Western Siberia in 3 oil production centers, two of which, in Eastern Siberia and Timano- Pechora, are to be built up within the next 3 years. Co. operates in 16 constituent territories of the Russian Federation from Republic of Sakha (Yakutia) to Kaliningradskaya Oblast. Co.'s mineral resource base comprises 134 license areas of 120,000 sq. km.

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.