Marc Andreessen
Marc Andreessen was born on July 9, 1971. See ranking, bio blurb, and everyone else born that day.
About Marc Andreessen
Marc Lowell Andreessen ( an-DREE-sən; born July 9, 1971) is an American businessman, venture capitalist, and former software engineer. He is the co-author of Mosaic, the first web browser to display inline images; co-founder of Netscape; and co-founder and general partner of Silicon Valley venture capital firm Andreessen Horowitz. He co-founded and later sold the software company Opsware to Hewlett-Packard; he also co-founded Ning, a company that provides a platform for social networking websites. In 2024, he became an advisor to Donald Trump. As of June 2026, Forbes estimated Andreessen's net worth at $1.9 billion.