OAO TMK
 OAO TMK (Russian: OAO Трубная Металлургическая Компания; English: Pipe Metallurgical Co. OJSC) (LSE: TMKS and MCX: TRMK) is a Russian producer of steel pipes for the oil and gas sector. It produces pipe grades used in the oil and gas sector the chemical and petrochemical industries for construction and housing shipbuilding aviation as well as for space industry needs and applications.