- Source of Wealth: Internet, Software, Investments
- Age: 48
- Birth Place: Cedar Falls, Iowa, United States
- Height: 6′ 4″ 1.96 m)
- Marital Status: Married (Laura Arrillaga-Andreessen)
- Full Name: Marc Lowell Andreessen
- Nationality: American
- Date of Birth: July 9, 1971
- Occupation: Entrepreneur, Investor, Software engineer
- Education: University of Illinois at Urbana-Champaign
- Children: 1 (John Andreessen)
American entrepreneur, venture capitalist and software engineer, Marc Andreessen, has an estimated net worth of $700 million. Marc Andreessen co-founded Netscape Communications Corporation, a computer services company and he his the co-author of the widely-used web browser, Mosaic. He has invested in several internet compnaies like Plazes, Netvibes, Cast TV and Twitter. He is serving on several boards, including Facebook, Ebay, Opsware and others. In 2009, Andreessen and his longtime business partner Ben Horowitz, founded their venture capital firm, Andreessen Horowitz, purposely at investing in the best new entrepreneurs, products, and companies in the information technology industry.