Jon Huntsman Sr.

Lifetime donations: $1.2 billion
Net worth: $940 million
Generosity Index: 128%
Jon Huntsman Sr. is the founder and executive chairman of Huntsman Corporation, a chemical product manufacturer.
Huntsman has reportedly survived prostate and mouth cancer and, as a result, established the Huntsman Cancer Institute at the University of Utah. Many of his charitable donations have been to colleges and cancer-research centers. He and his wife also agreed to join Buffett's Giving Pledge, promising to donate 50% of their wealth.
Source: Wealth-X