Suleiman Kerimov could obtain 75 percent of Tekhinvest, the company that owns the Eurasia Tower under construction in Moskva-City.
The Federal Anti-Monopoly Service has allowed Girol Consolidated, affiliated with Kerimov, to acquire the stake, the service said.
Tekhinvest, the developer building the 214,000-square-meter tower, is part of Pavel Fuks' MosCityGroup. Construction of the tower was carried out using a $400 million credit line provided by Sberbank in 2008. About $175 million of the loan amount has been spent.
Construction was frozen during the financial crisis, when the tower was two-thirds completed.
Last year, Sberbank demanded through a Moscow arbitration court that Tekhinvest return about 5 billion rubles ($179 million) and sought to foreclose on the tower.
In October 2011, the bank sold the rights to the loan to Demoginet, a company affiliated with Kerimov's Nafta Moskva. In January, the court ruled that the foreclosure should proceed and that Tekhinvest should pay its creditor nearly 6 billion rubles.
The market value of the tower is about $750 million, according to Artyom Tsogoyev, project manager at Trinfiko Property Management.