After a few investors walked away, Northern Dynasty was the only company left seeking development. The Pebble Limited Partnership is now 100% owned by The Northern Dynasty Partnership, which is a wholly owned Canadian-based subsidiary of Northern Dynasty Minerals, Limited. Three of the world's largest mining companies purchased shares of Northern Dynasty or became partners in the Pebble Limited Partnership through obligations to fund exploration and development. All have since divested their interests. Mitsubishi Corporation sold its 9.1% interest in Northern Dynasty Minerals in 2011. Anglo American, a South African mining company, struck a deal with Northern Dynasty to earn a 50% interest in a newly created Pebble Limited Partnership, the other 50% belonging to Northern Dynasty; between 2007 and 2013 Anglo American spent over half a billion dollars on the project. In December 2013 Anglo American walked away from the project, losing its 50% interest, which reverted to Northern Dynasty Minerals Limited. 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. On December 23, 2013, Rio Tinto announced it reviewed its $200 million investment in Northern Dynasty Minerals, and considered divesting. On April 7, 2014, Rio Tinto divided its 19% holdings in the project equally between the Bristol Bay Native Corporation, which had opposed the mineed, and the Alaska Community Foundation, which had cooperated with Northern Dynasty in managing the Pebble Fund, a financier of grants to organizations in the Bristol Bay area. In April 2014, the Rio Tinto Group gifted its shares, worth only approximately 18 million by then, to two Alaskan charitable foundations. Northern Dynasty is one of several public mining companies controlled by Hunter Dickinson, a Vancouver-based Canadian mining corporation. All but one of Hunter Dickinson Corporation's board members are also on the Northern Dynasty board. Most of the senior management of Northern Dynasty also hold senior management positions at Hunter Dickinson Corporation. As reported on February 13, 2019, Kopernik Global Investors beneficially owns 6.17% of Northern Dynasty Minerals, which is an increase of 11% in their ownership stake from their prior reported position reported in February, 2018. Based on filings, Kopernik has held a position in NAK since at least as early as 2015, when they owned 19.99%. Economics Pebble is the largest