Igor Rotenberg Igor Rotenberg Igor Rotenberg, () is a Russian billionaire businessman and the oldest son and heir to Arkady Rotenberg, Russian billionaire businessman and co-owner with brother Boris Rotenberg, of the SGM (Stroygazmontazh) group. The Rotenberg's are closely associated with Vladimir Putin. In October 2018, Igor Rotenberg's wealth is estimated to be $1.1 billion. Igor Rotenberg has been under United States sanctions since 6 April 2018. Igor is the majority shareholder in Gazprom Drilling. Igor Rotenberg was born on 9 September 1974 in Leningrad to Arkady Rotenberg. In 2002, he graduated from the Higher School of Privatization and Entrepreneurship () in
Rotenberg (hills) the north, Herzberg am Harz to the northeast, Bad Lauterberg to the east, Duderstadt to the south, Göttingen to the southwest and Northeim to the northwest. According to the official classification of natural regions of Germany the ridge belongs to the landscape unit of the Eichsfeld Basin in the Weser-Leine Uplands. The Rotenberg is surrounded by the following other ranges: the Harz Mountains to the north and, somewhat further away, the Ohm Hills to the southeast and the Göttingen Forest to the southwest. The Rotenberg hills lie on the watershed between the Oder and Beber rivers in the north and