As of 2015, some of the richest women in the world include Christy Walton, Laurene Powell Jobs and Elizabeth Holmes. Christy Walton has a net worth of $41.7 billion, Laurene Powell Jobs has a net worth of $19.5 billion and Elizabeth Holmes is worth $4.5 billion.
Women account for 197 of the 1,826 billionaires in the world. Christy Walton is the world's richest woman, having inherited a stake in Wal-Mart from her late husband John Walton, son of Sam Walton, the founder of the company. Christy Walton is the world's foremost female philanthropist and supports many nonprofits and charitable organizations, including The Philanthropy Roundtable and the Walton Family Charitable Support Foundation.
Laurene Powell Jobs is the sixth-richest woman in the world. She is the widow of Apple co-founder Steve Jobs and the founder of the Emerson Collective, an organization that focuses on social reform by partnering with entrepreneurs. Laurene and Steve Jobs were married for 20 years before he passed away from cancer in 2011.
Elizabeth Holmes, the 121st-richest woman in the world, is one of only 29 female billionaires who did not inherit their money. Holmes started her company Theranos, which specializes in blood diagnostics, at age 19. Theranos is now worth $9 billion; at 31 years old, Holmes is the world's youngest self-made billionaire.