The story
The company was founded in 1996 as a mining exploration company prospecting in South Voisey's Bay, Newfoundland and Labrador. While this project eventually stalled, along the way a relationship with Falconbridge was developed.
In 2006, Donner signed a deal with Falconbridge, wherein Donner was required to spend $20 million by May 31, 2011, plus an additional $5 million if a brand new discovery was made. The deal effectively makes Donner "the funding vehicle for exploration within the Matagami base metal camp". Glencore Xstrata can earn back a 15% interest on each of the 6 JV areas. Glencore Xstrata has earned the additional 15% in the Bracemac-McLeod and South Flank JVs.
From Wikipedia’s article on Sphinx Resources, shared under CC BY-SA 4.0.3