8. Carnegie Institution for Science
The Carnegie Institution for Science, founded in 1902 by American steel magnate Andrew Carnegie, is an organization devoted to scientific discovery. The charity focuses on research in earth science, plant and developmental biology and astronomy.
Based on data from Charity Navigator, the charity has achieved the highest rating for fiscal responsibility and excellence for 13 consecutive years. For fiscal 2012, of the $121.69 million raised, 86.2% went directly towards research and development.