Black River DWC-LLC acquired an additional 8.64% stake in Prime Minerals S.A. (WSE:PMT) on November 30, 2018. Post completion, Black River DWC-LLC will own 31.41% stake in Prime Minerals S.A. Black River DWC-LLC completed the acquisition of an additional 8.64% stake in Prime Minerals S.A. (WSE:PMT) on November 30, 2018.