Martha Lane Fox, a British-born entrepreneur, has a net worth of $500 million.
Ms.
During the peak of the dot com boom in 1998, Lane, a soft-spoken, Oxford-educated woman, co-founded lastminute.com.
She had been serving as Group Managing Director for the majority of the time before eventually resigning from the company in 2003. However, Lane persisted in participating in other initiatives.
She is a co-founder of both Antigone Foundation, a grant-making foundation, and a chain of private room karaoke clubs called Lucky Voice.
She also sits on the boards of Channel 4, Marks and Spencer and mydeco.com.