AngloGold said in May that it would review divestment options for its Mponeng mine and other South African assets to focus on higher returns elsewhere.

"Yes we are under confidentiality because we are part of that process," Neal Froneman said when asked by a reporter whether Sibanye-Stillwater is interested in acquiring the mine and whether it has a non-disclosure agreement.

He declined to comment further.

(Reporting by Tanisha Heiberg; Editing by Susan Fenton)