Limited Liability Company Concern ROSSIUM acquired an additional 4.83% stake in Public Joint Stock Company Open Investments (MISX:OPIN) on September 11, 2017. Following the completion of the deal, Limited Liability Company Concern ROSSIUM had increased its stake to 63.51% from 58.68% stake in Public Joint Stock Company Open Investments. Limited Liability Company Concern ROSSIUM completed the acquisition of an additional 4.83% stake in Public Joint Stock Company Open Investments (MISX:OPIN) on September 11, 2017.