An organization, RAISE Hope for Congo, ranked electronic companies on their efforts to use and invest in conflict-free minerals. Companies such as Intel (Score = 60) and HP (Score = 54) ranked the highest. Nintendo, Nikon, Sharp, and Canon ranked the lowest scoring between 0 and 8. The highest scoring companies are taking "proactive steps to trace and audit their supply chains," while the lowest ranking companies have done very little to change their practices.
If you would like to read the full report, you can download the full PDF here: Enough Corporate Rankings 2012 Report.