As of March 2012, she is worth USD 25.3 billion with Wal-Mart, United States, being her source of wealth.

The widow of John Walton, she inherited his fortune of USD 15.7 billion after he died in an airplane accident in 2005. Regaining her 2010, 2011 title as world’s richest woman, she got an extra bump in her fortune because of her late husband’s early investment in First Solar; shares up nearly 500 percent since 2006 initial public offering.