Pentwater Issues Public Letter on Corporate Governance to Rio Tinto Director Ben Wyatt

Pentwater Capital Management LP ("Pentwater"), the largest minority shareholder of Turquoise Hill Resources Ltd. ("Turquoise Hill") (TSX:TRQ) (NYSE:TRQ), wrote the following letter to Rio Tinto plc (Rio Tinto or Rio) (LSE:RIO) Director Mr. Ben Wyatt and the rest of the Rio Tinto Board.