1. William Barron Hilton, $1.2 billion

2. Jon M. and Karen Huntsman, $750 million

3. T. Denny Sanford, $474.6 million

4. G. George Soros, $474.6 million

5. John W. Kluge, $400 million

6. Sanford I. and Joan Weill, $328.5 million

7. Michael R. Bloomberg, $205 million

8. T. Boone Pickens, $200.8 million

9. Robert Day, $200 million

10. Eli and Edythe L. Broad, $176 million

Source: The Chronicle of Philanthropy