Boris Romanovich Rotenberg Boris Romanovich Rotenberg Boris Romanovich Rotenberg (, born in Leningrad on 3 January 1957) is a Russian business man and oligarch. He is co-owner (with his brother Arkady Rotenberg) of the SGM (StroyGazMontazh) group, the largest construction company for gas pipelines and electrical power supply lines in Russia. He was listed by Forbes as Russia's 69th wealthiest person in 2016 with a net worth of $1.07 billion. He is considered a close confidant of president Vladimir Putin. Rotenberg was very involved in martial arts between 1968 and 1978, particularly judo. He trained alongside Vladimir Putin and won several awards for
Roman Rotenberg club, which was joining the KHL in the 2014/2015 season. In October 2014, Roman Rotenberg bought out the parts which his father and uncle owned in the deal. They were both on the USA's sanctions list. The Langvik Capital company, which is made up of a hotel and business hall not far away from Helsinki, acted as the intermediary. Roman Rotenberg also owns the Langvik Capital company. Arena Events Oy shares are divided out as follows: Langvik Capital – 49.5%, Roman Rotenberg 1%, White Anchor (Gennady Timchenko) – 49.5%. On July 30, 2015, Roman Rotenberg and the Oy Langvik Capital