The mysterious "sponsor" Maria Butina, which the US authorities are accused of illegally lobbying Russian interests, was Konstantin Nikolayev. This is an ex-partner of Arkady Rothenberg, Alexei Mordashov and Gennady Timchenko. He, together with the ex-head of the presidential administration of Russia, Alexander Voloshin, owns the energy company American Ethane.
The role of the co-owner of the railway company Globaltrans was told by the Washington Post.
According to The Guardian, the former head of the presidential administration invested $ 1.25 million in American Ethane.