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 companies in the sports marketing, media and sports equipment markets. He is also active in these following fields: owner of the Hartwall Arena stadium, chairman of the Arena Events board of directors and is Gazprom Export's consultant on external communications. Roman Rotenberg was born in Leningrad, the Soviet Union, in 1981. Irina Haranen, his mother, had a good job in the city's commercial management, while his father Boris Rotenberg, a Russian Master of Sport and a judo coach, taught self-defence at the military academy. His grandfather was of Jewish descent, and worked as a director at the Leningrad factory plant