Lifetime donations: $1.6 billion Net worth: $40.7 billion Generosity Index: 4% Facebook founder and CEO Mark Zuckerberg is one of the youngest self-made billionaires in the world.
As the company's valuation soared, Holmes took to wearing Steve Jobsian black turtlenecks, and was proclaimed "the youngest self-made female billionaire in the world" by Forbes.
Numerous investors and consumers fell for her story, and at one point the company was valued at $9bn, making Holmes the youngest self-made female billionaire ever.
In three days the value of GREE, whose 35-year-old owner, Yoshikazu Tanaka, has been called the youngest self-made billionaire after Facebook's Mark Zuckerberg, plunged by a third.
In 2008, when Forbes first named him the world's youngest self-made billionaire, he was renting a one-bedroom apartment and sleeping on a mattress on the floor, his older sister, Randi Zuckerberg, told me.
He thinks Japan's ¥500 billion social-mobile games market could expand as much globally.Yoshikazu Tanaka, the 35-year-old founder of GREE (and Asia's youngest self-made billionaire), believes that if you add in emerging markets the growth potential soars.
Holmes owns more than fifty per cent of the company; she was profiled last spring in Fortune and subsequently featured in Forbes as "the youngest self-made female billionaire in the world".
But Mr. Gates, who came in at third place with $58 billion after 13 years of holding the No. 1 spot, helped a young Turk become the youngest self-made billionaire to crack the magazine's annual list.
"The 24 corporate CEOs control nearly $1tn in annual revenues, and 18 of the women here founded their own companies or foundations, including our youngest self-made billionaire, Elizabeth Holmes, 31.
Elizabeth Holmes, 31, described as the world's youngest self-made billionaire, who founded blood donor company Theranos and is now said to be worth an estimated £3bn, also makes her debut and is ranked No 72.
