Rosneft PJSC is a major Russian oil and gas company majority owned by the state-owned Rosneftegaz.
Gazprom PJSC is a Russian transnational energy company, more than 50% owned by the state. It is a holding company of the Gazprom Group.                                                 
Gazprom Neft PJSC is a Russian vertically integrated oil company. Its main activities include exploration and development of oil and gas fields, oil refining, production and sale of petroleum products.
Lukoil PJSC is one of the largest Russian oil companies and the second largest oil producer in Russia.
RusChemAlliance LLC is a special purpose company for the implementation of a gas processing plant project as part of the Ethane Gas Processing Complex near Ust-Luga (Kingisepp District, Leningrad Region, Russian Federation).
Nevsky Plant JSC is one of Russia's leading power engineering companies. Since 2019, it has become part of Gazprom Energoholding Group.
Sibneftegaz JSC is a major Russian oil and gas company and a member of the Rosneft group of companies.
LENGAZSPETSTROY JSC is a production company of the Gazstroyprom Group and one of the leading enterprises in Russia for the construction of gas trunklines, compressor stations, underground storage facilities and other oil and gas industry facilities.
Alderley LLC is a UK company at the forefront of the oil and gas engineering industry as an independent solutions provider. 
ABB Ltd. is a Swedish–Swiss multinational corporation headquartered in Västerås, Sweden, and Zürich, Switzerland. It is traded on the SIX Swiss Exchange in Zürich, the Nasdaq Nordic exchange in Sweden and the OTC Markets Group's pink sheets in the United States. It was ranked 340th in the Fortune Global 500 list of 2020 and has been a global Fortune 500 company for 24 years.
Naryanmarneftegaz LLC is a company established in Naryan-Mar (Nenets Autonomous District) in December 2001, working in the field of integrated development and operation of oil and gas fields in the Timan-Pechora oil and gas province within the boundaries of the Nenets Autonomous District.
Fluor Corporation is an American engineering and construction holding company headquartered in Irving, Texas.
ITG Holding (INLINE Technologies Group) is a horizontally integrated group of companies specializing in information technologies and supplying its products and services to corporate customers in order to improve the efficiency of their operations.
JSC NK Alliance Oil Company is a Russian oil company. In 2008 merged with West Siberian Resources to form Alliance Oil, an international oil company incorporated in Bermuda.
Iskra-R PJSC is a subsidiary of NPO Iskra, PJSC, which is part of the perimeter of Roscosmos State Corporation.
LLC PO Kirishinefteorgsintez is an oil refinery in the town of Kirishi, Leningrad Region. The history of oil refining in the North-West region is connected with the Kirishi Refinery. Since its commissioning in 1966, the enterprise has been the main supplier of petroleum products for St. Petersburg, Leningrad, Novgorod, Pskov regions and other Russian consumers.