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Denny Sanford
Mr. Sanford, shown here in statue form, is the CEO of United National Corp. He's a billionaire who made his fortune in the credit card business as the founder of redundantly named First Premier Bank. He concentrates a great deal of his giving in South Dakota, the state from which he hails.
Wikimedia Commons
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Carl Icahn
The billionaire corporate raider has bought shares in and agitated for change at companies as disparate as Motorola and Marvel Comics. He grew up on Far Rockaway, races horses and has a stadium named after him.
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Charles Zegar
Mr. Zegar is a cofounder of financial-media titan Bloomberg LP. Despite his massive wealth, it's damn near impossible to find a photograph of him on the Internet.
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David Green
The founder of the Hobby Lobby arts and crafts stores is worth $2.6 billion, according to Forbes. He is a devout Christian.
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Joe Mansueto
A Midwesterner, the founder and CEO of investment research firm Morningstar is said to idolize Omaha billionaire Warren Buffett.
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Dustin Moskovitz
A co-founder of Facebook, Mr. Moskovitz is worth $1.4 billion, according to Forbes. In The Social Network, he was portrayed by Joseph Mazzello, who played the kid in Jurassic Park.
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George Mitchell
The former CEO of Mitchell Energy has given extensively to Texas A&M University, his alma mater.
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Leon Cooperman
Mr. Cooperman started Goldman Sachs' asset management firm and later went on to found enormously successful hedge fund Omega Advisors.
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Lyda Hill
"I wish to make the world a better place by advancing solutions to medical and environmental issues through investments in and donations to science," said the founder of Hill World Travel.
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Mark Zuckerberg
This guy founded a little thing called Facebook and is the 2010 Time Person of the Year.
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Nicolas Berggruen
The billionaire son of an art collector has been dubbed "The Homeless Billionaire" because of his penchant for staying in hotels instead of houses. He made his money the hedge-fund way.
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Steve Case
This guy founded America Online and is a former manager of new pizza marketing for Pizza Hut.
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Mike and Lori Milken
Junk-bond pioneer Michael Milken pleaded guilty in 1990 to six counts of securities fraud. He also financed the acquisition of TWA by fellow giver Carl Icahn. A prostate cancer survivor, he has given extensively to medical and educational foundations.
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Thomas Secunda
Mr. Secunda is another co-founder of Bloomberg LP. Like fellow Bloombergian Charles Zegar, Mr. Secunda keeps a low profile.
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Sidney Kimmel
The founder of Jones Apparel has donated extensively to fund cancer research. His film company also produced that classic if misbegotten Michael Caine movie, Blame It on Rio, where a middle-aged guy falls in love with his buddy's daughter.
