Marc Andreessen Net Worth

Marc Andreessen has an estimated net worth of $1.9 billion, according to Forbes Real-Time Billionaires, Marc Andreessen profile (figures as of October 20, 2026). That is up from $1.3 billion in 2019.

Marc Andreessen is an American businessman, venture capitalist, and former software engineer. He first got wide attention after co-creating Mosaic while still in college. The browser helped make the web easier to use, with inline images and support across more computers. He then co-founded Netscape, where he served as co-founder and vice president of technology. Netscape became a major commercial web browser company and turned him into a well-known figure in tech.

His wealth later came mainly from founding and investing. After Netscape, he helped start Loudcloud, which was later renamed Opsware and sold to Hewlett-Packard for $1.6 billion in 2007. He also co-founded Ning. In 2009, he and Ben Horowitz launched Andreessen Horowitz, a Silicon Valley venture capital firm. Forbes says his current net worth is $1.9 billion on its real-time billionaires tracker as of October 20, 2026.

How Marc Andreessen built his fortune

Andreessen made his name first as a browser pioneer, then as a founder. While at college, he co-created Mosaic, a highly influential internet browser. He later co-founded Netscape, whose browser became a successful commercial product. That company was bought by AOL in 1998 for $4.2 billion in stock, according to Forbes. He also co-founded Loudcloud, which later became Opsware and sold to Hewlett-Packard for $1.6 billion in 2007.

A big part of his wealth comes from investing. Andreessen runs Andreessen Horowitz, an influential Silicon Valley venture capital firm. Forbes notes that the firm has had successful bets in Instagram, Oculus VR, and GitHub. Forbes also says his biggest score was as a seed investor in Facebook. The firm kept expanding into new areas too. In June 2018, a16z raised $300 million for its first crypto-focused fund, co-led by Chris Dixon and Katie Haun.

Forbes net worth timeline

Forbes has tracked Andreessen as a self-made billionaire in finance and investments. On the Forbes World's Billionaires List, it estimated him at $1.3 billion in 2019, then $1.2 billion in 2020. The estimate moved up to $1.7 billion in 2021 and stayed at that level in 2022 and 2023. Those later years followed decades of company building, venture investing, and high-profile startup bets through Andreessen Horowitz.

The Forbes estimate rose again to $1.9 billion in 2024 and remained there in 2025 and 2026. Forbes also had him at $1.9 billion on its Real-Time Billionaires list in Oct 2026. The money story in the Forbes notes centers on venture capital investing, including Andreessen Horowitz holdings and his early Facebook investment. Earlier exits at Netscape and Opsware also help explain why he became wealthy long before those later Forbes updates.