By IBTimes Staff Reporter | November 29, 2012 5:43 PM IST

Top 10 Billionaires Who Have Signed The Giving Pledge [PHOTOS]

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Ronald Perelman, Chairman & CEO of MacAndrews & Forbes, is known for his $50 million donation to New York Presbyterian Hospital and Weil Cornell Medical Center for the Ronald O. Perelman Heart Institute. He signed The Giving Pledge in August 2010. (Reuters/)