Facebook CEO Mark Zuckerberg delivers the keynote address (Credit: AP)

Facebook CEO Mark Zuckerberg delivers the keynote address at the f8 Facebook Developer Conference in San Francisco on April 30, 2014.

5 biggest philanthropists in technology

Facebook CEO Mark Zuckerberg and his wife Priscilla Chan, a pediatrician, topped the list of the most generous American philanthropists in 2013 with a donation of 18 million shares of Facebook stock that are now worth more than $1 billion. According to the Chronicle of Philanthropy, it was the largest charitable gift on the public record in 2013. On Friday, they announced a $120 million gift to the San Francisco Bay Area public school system.

Some of the nation's biggest givers, including Microsoft co-founder Bill Gates and his wife, Melinda, did not appear on the 2013 list, not because they stopped being generous, but because their donations in 2013 were counted as pledges in previous years.

With that, here are the five biggest donors from the technology sector last year, as compiled by the Chronicle of Philanthropy.

1. Mark Zuckerberg and Priscilla Chan

Mark Zuckerberg and Priscilla Chan, with more than
(Credit: AP)

Mark Zuckerberg and Priscilla Chan, with more than $1 billion, to the Silicon Valley Community Foundation.

2. Pierre Omidyar and his wife, Pam

EBay founder Pierre Omidyar and his wife, Pam,
(Credit: AP)

EBay founder Pierre Omidyar and his wife, Pam, with $225 million to HopeLab, Humanity United, Omidyar Network, and the Ulupono Initiative. (Omidyar (L) pictured with Dalai Lama)

3. Irwin Jacobs and his wife, Joan

Qualcomm co-founder Irwin Jacobs and his wife, Joan,
(Credit: AP)

Qualcomm co-founder Irwin Jacobs and his wife, Joan, with $221 million to The Jacobs Technion-Cornell Innovation Institute at Cornell Tech, a technology-focused graduate school in New York City, and other entities such as the San Diego Public Library Foundation.

4. Sergey Brin and his wife, Anne Wojcicki

Google co-founder Sergey Brin and his wife, Anne
(Credit: AP)

Google co-founder Sergey Brin and his wife, Anne Wojcicki (now separated) with $219 million to the Brin Wojcicki Foundation and to the Michael J. Fox Foundation for Parkinson's Research.

5. Paul Allen

Microsoft co-founder Paul Allen, with $206 million to
(Credit: AP)

Microsoft co-founder Paul Allen, with $206 million to the Paul G. Allen Family Foundation and to the EMP Museum in Seattle.

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