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
Arkady Rotenberg committee of the International Judo Federation. In preparation 2014 Winter Olympics in Sochi, Rotenburg won contracts worth $7 billion, including a $2 billion coastal highway and an underwater gas pipeline that came it at 300% of average costs. Rotenberg was named in the Panama Papers. Those leaked legal documents show Rotenberg sent $231 million in loans to a company in the British Virgin Islands in 2013. In 2013 Rotenberg became the chairman of the , which had once been the biggest supplier for textbooks in the Soviet Union. After Enlightenment became a private company in 2011, the government of the