Dmitry Mazepin’s Uralchem increased its stake in Uralkali from 46.4 percent to 81.5 percent after buying out a portion of a partners’ share, according to Bloomberg, citing a regulatory filing. Rinsoco Trading, owned by Dmitry Lobyak, cut its stake in Uralkali from 53.6 percent to 18.5 percent, the filing shows. The deal was funded with Sberbank loan, according to a statement by Uralchem.