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Billionaire Profile
Marc Andreessen
Global Rank
#2231

Image: JD Lasica | CC BY 2.0 | via Wikimedia Commons

Marc Andreessen

CEO, Venture capital investing
Atherton, California
Real-Time Net Worth
$1.89B
Estimated based on Venture capital investing stock value as of September 10, 2026
-0.02% (24h)
Age
54
Source
Venture capital investing
Industry
Finance & Investments
Citizenship
United States

Biography

Marc Lowell Andreessen (born July 9, 1971) is an American businessman, investor, and software engineer. With an estimated net worth of $1.9 billion, he is a prominent figure in the venture capital world. Andreessen is the co-author of Mosaic, the first widely used web browser, and co-founder of Netscape, a pivotal company during the early days of the internet. His wealth primarily stems from his venture capital investing through Andreessen Horowitz (a16z), a Silicon Valley venture capital firm he co-founded in 2009 with Ben Horowitz. His career includes co-founding Opsware, later sold to Hewlett-Packard, and Ning, a social networking platform. Andreessen is recognized for his influence in the tech industry and has received numerous awards and accolades for his contributions.

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Data Updated
Sep 10, 2026
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Wealth Over Time

Net Worth History

YearNet Worth
2026$1.89B
2025$1.90B
2024$1.90B

Portfolio Holdings

Facebook

Facebook

Technology
77,986 employees
Coinbase

Coinbase

COIN•Finance
San Francisco, CA
Founded 2012
GitHub

GitHub

technology
Revenue
$2.00B
San Francisco, California
5001-10000 employees
Founded 2008

In-Depth Profile

Early Life

Marc Lowell Andreessen was born in Cedar Falls, Iowa, on July 9, 1971, and was raised in New Lisbon, Wisconsin. From a young age, Andreessen showed an interest in computers, teaching himself programming and creating games. He attended the University of Illinois at Urbana-Champaign, where he earned a bachelor's degree in computer science in December 1993. During his time at UIUC, he interned at IBM and worked at the National Center for Supercomputing Applications (NCSA), where he contributed to the development of the Mosaic web browser.

Rise to Success

Andreessen's career took off after he co-authored Mosaic, which became the first widely used web browser with a graphical user interface. In 1994, he co-founded Netscape Communications Corporation with Jim Clark. Netscape's IPO in 1995 brought Andreessen significant public attention, and the company was later acquired by AOL in 1999 for $4.3 billion. Following the acquisition, Andreessen became AOL's chief technology officer. In 2009, Andreessen co-founded Andreessen Horowitz with Ben Horowitz, a venture capital firm that has invested in many successful companies.

Key Business Strategies

Andreessen's success is attributed to several key strategies. At Andreessen Horowitz, he focuses on investing in disruptive technologies and supporting entrepreneurs building companies from seed to growth stages. The firm has invested in sectors including healthcare, consumer, cryptocurrency, gaming, fintech, and enterprise software. Andreessen Horowitz provides extensive support to its portfolio companies.

Philanthropy

Marc and his wife, Laura Arrillaga-Andreessen, are known for their commitment to philanthropy. They have supported various socially conscious organizations and projects, from economic development to education.

Career Milestones

1993

Co-created Mosaic

Co-authored Mosaic, the first widely used web browser with a graphical user interface.

1994

Co-founded Netscape

Co-founded Netscape Communications Corporation, playing a key role in the early internet.

1999

Netscape Acquired by AOL

Netscape was acquired by AOL for $4.3 billion, where Andreessen became Chief Technology Officer.

2009

Co-founded Andreessen Horowitz

Co-founded Andreessen Horowitz, a venture capital firm.

2012

Time 100

Named in the Time 100 list of the 100 most influential people in the world.

Philanthropy & Social Impact

Social Impact

Silicon Valley Social Venture Fund

Undisclosed

Laura Arrillaga-Andreessen, Marc's wife, founded the Silicon Valley Social Venture Fund and promotes various socially conscious causes.

Business Philosophy & Leadership

Notable Quotes

"Innovation accelerates and compounds."

"In a startup, absolutely nothing happens unless you make it happen."

"Software is eating the world."

Leadership Principles

Focus on People

Andreessen Horowitz prioritizes people when making investment decisions, emphasizing courage and genius in entrepreneurs.

Embrace Radical Ideas

Andreessen encourages investment in innovative and often initially 'crazy' ideas.

Continuous Learning

Andreessen and his firm prioritize learning from the best entrepreneurs and adapting to changing technology.

Billionaires Connected to Marc Andreessen

Peers in Finance & Investments

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Richest in United States

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Adjacent Global Ranks

Full global ranking →

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Frequently Asked Questions

What is Marc Andreessen's net worth in 2026?
As of 2026, Marc Andreessen's estimated net worth is $1.886 billion, ranking #2231 among the world's billionaires. The estimate is based on publicly available shareholding data and market prices, updated daily.
How did Marc Andreessen make their money?
Marc Andreessen's wealth primarily comes from Venture capital investing, most notably through Venture capital investing.
Where is Marc Andreessen from?
Marc Andreessen is from United States.
How old is Marc Andreessen?
Marc Andreessen is 54 years old.

Sources & References

  1. Marc Andreessen — Forbes profile — Forbes