Bangalore: Women make up only 5 percent of the CEOs in S&P 500 companies, Standard & Poor’s stock market index based on the market capitalization of 500 leading companies. The number is growing up, and hit a record 20 when Marissa Mayer took the helm at Yahoo last year. Here is the list of 5 women CEO who are heading biggest tech companies as compiled CNBC.

#1 Ursula Burns

Company : Xerox

Ursula M. Burns serves as Madam Chairman and CEO of Xerox. In 2009, she became the first African-American woman CEO to head a Fortune 500 company. That was 29 years after she joined Xerox as an intern in mechanical engineering. She is also the first woman to succeed another woman as head of a Fortune 500 company. In 2009, Forbes rated her as the 14th most powerful woman in the world. In 2010, President Barack Obama appointed Burns vice chairwoman of the President’s Export Council.

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