Christy Ruth Walton (born 1955) is the widow of John T. Walton, one of the sons of Sam Walton, the founder of Wal-Mart. After John's death in June 2005, she inherited his fortune of $15.7 billion.
As of December 2011, she is the 6th richest person in the United States according to Forbes and the 10th richest person in the world, as well as the richest woman in the world. As of March 2011, she had an estimated net worth of US$26.5 billion, the bulk of which comes from her shares in Wal-Mart, but also from First Solar, in which her husband invested. She resides in Jackson, Wyoming and has one son, Lukas.
Facesofphilanthropy.com references Condé Nast Portfolio magazine as ranking her the highest female philanthropist, according to the amount she gives as a percentage of her wealth. Between 2002 and 2006, she contributed billions from her then $16.3 billion net worth towards philanthropic efforts.
Non-profit organizations in which Walton is actively serving include the national association of trustees and staff, corporate giving officers, and individual donors – The Philanthropy Roundtable. The San Diego Natural History Museum where she is a board member, as well as the San Diego Zoological Society and the Mingei International Museum are also institutions in which she makes donations towards. In 2006, Walton also donated her own old Victorian home to the International Community Foundation – Center for Cross-Border Philanthropy, which was built in 1896 for former National City, California postmaster Oliver Noyes and is of historical significance. Since her donation, she has endowed $4 million towards the edifice's preservation.
Additionally, she supports her family's own charitable foundation, the Walton Family Charitable Support Foundation, which prioritizes education and benefits colleges such as the University of Arkansas, the College of Business Administration of the University of Arkansas, and several other colleges, community trusts, universities and foundations. In 2007, her family's foundation donated as much as $1.6 billion.
From : www.wikipedia.org