An undisclosed buyer acquired 50% stake in Arktikgaz, OAO from PJSC Gazprom Neft (MISX:SIBN) on January 15, 2017. An undisclosed buyer completed the acquisition of 50% stake in Arktikgaz, OAO from PJSC Gazprom Neft (MISX:SIBN) on January 15, 2017.