Facebook Inc (NASDAQ:FB) CEO Mark Zuckerberg and his wife Dr. Priscilla Chan were the most generous Americans in 2013. The two of them donated 18 million Facebook shares that were valued at over $970 million to the Silicon Valley Community Foundation. The Chronicle of Philanthropyranked the top 50 donors and they came out on the top.
The top 50 donors gave $7.7 billion as a whole last year, which is 4% more than in 2012. Zuckerberg and his wife became the youngest ever philanthropists to hit the top of the ranks.
Zuckerberg and his wife were followed by Texas energy tycoon George Mitchell. Mitchell passed away in July, but he left an estimated $750 million to his family foundation. Nike co-founder Phil Knight and his wife Penelope gave $500 million for cancer research to the Oregon Health & Science University Foundation, but the institution has to match the gift in two years or they will lose it.