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 Russian Federation started to make several changes in that sector. In 2013 an internal council was formed by the Ministry of Education to check all textbooks. Many of Enlightenments competitors books did not pass this new evaluation and so Enlightenment won about 70% of the contracts for new textbooks in the Russian Federation in 2014. In 2015, Arkady Rotenberg sold to his son Igor Rotenberg a number of assets including up to 79% of Gazprom Drilling (Bureniye), 28% of the road construction company Mostotrest, and 33.3% of Jersey-based TPS Real Estate Holdings Ltd. Alexander Ponomarenko and Aleksandr Skorobogatko own 66.6%