Public Joint-Stock Company TNS energo Nizhny Novgorod (MISX:NNSB) acquired 15.9% stake in TNS energo Tula on July 3, 2018. Public Joint-Stock Company TNS energo Nizhny Novgorod (MISX:NNSB) completed the acquisition of 15.9% stake in TNS energo Tula on July 3, 2018.