リオ・ティント
Rio Tinto Group, through its wholly owned subsidiary Kennecott Utah Copper purchased, for 87 million dollars, a 9.9% ownership of Northern Dynasty Minerals Limited in July, 2006, and in 2007 doubled that to 19.8% ownership, for an additional 94 million dollars. In April 2014, the Rio Tinto Group gifted its shares, worth only approximately 18 million by then, to two Alaskan charitable foundations.