Andreessen Net Worth (Updated 2026).
Andreessen, a name that has become synonymous with the tech industry, began his career in the early 1990s. After graduating from the University of Illinois at Urbana-Champaign with a degree in Computer Science, he moved to California to pursue his passion for technology. His first job was at a small startup called Lotus Development, where he worked as a software engineer. It was here that Andreessen honed his skills and gained valuable experience in the tech world.
In 1993, Andreessen made a significant leap in his career when he joined a then little-known company called Sun Microsystems. Here, he worked on the development of the company’s web browser, NCSA Mosaic. This browser was one of the first to popularize the World Wide Web, making it accessible to the masses. Andreessen’s work on NCSA Mosaic brought him to the forefront of the tech industry and laid the foundation for his future success.
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Andreessen’s Current Net Worth (2025)
As of 2025, Marc Andreessen’s net worth is estimated to be around $1.8 billion, according to Forbes. This significant wealth can be attributed to his successful career as a software engineer, entrepreneur, and venture capitalist.
Career
Marc Andreessen is a renowned figure in the tech industry, co-inventing the Mosaic web browser in 1993, which revolutionized internet usage. He co-founded Netscape in 1994, which was later acquired by AOL. After Netscape, Andreessen co-founded Loudcloud and Opsware, both of which were acquired by HP. In 2009, he co-founded Andreessen Horowitz, a venture capital firm that has invested in companies like Facebook, Twitter, and Airbnb.
Other Ventures
Andreessen is also a prominent angel investor, having backed companies like Instagram, Pinterest, and Lyft. He is known for his early and significant investments in these startups, contributing to their growth and success. Additionally, Andreessen is a philanthropist, donating to various causes, including education and health.
Assets
Andreessen’s assets include a significant stake in Andreessen Horowitz, valued at over $1 billion. He also owns properties in Atherton, California, valued at around $20 million. His investment portfolio includes stakes in numerous successful tech companies, which contribute significantly to his net worth.
Annual Income
Andreessen’s annual income is primarily derived from his venture capital firm, Andreessen Horowitz. As of 2021, the firm manages over $16 billion in assets, generating substantial management fees and carried interest for its partners, including Andreessen. His income also includes dividends from his investment portfolio and any consulting or advisory fees he may earn.
Frequently Asked Questions about Andreessen
**1. What is Marc Andreessen’s net worth?**
Marc Andreessen’s net worth is estimated to be around $1.7 billion.
**2. How did Marc Andreessen make his fortune?**
Marc Andreessen made his fortune primarily through his successful career in the tech industry. He co-founded Netscape, one of the first web browser companies, and later co-founded the venture capital firm Andreessen Horowitz.
**3. What is Andreessen Horowitz?**
Andreessen Horowitz, often referred to as a16z, is a venture capital firm co-founded by Marc Andreessen and Ben Horowitz in 2009. It focuses on investing in technology startups.
**4. What was Marc Andreessen’s role at Netscape?**
At Netscape, Marc Andreessen served as the co-founder and vice president of technology. He played a pivotal role in the development of the Netscape Navigator web browser.
**5. What is the “Andreessen Horowitz effect”?**
The “Andreessen Horowitz effect” refers to the phenomenon where a16z’s investment in a startup can significantly boost its valuation and profile, often leading to a higher exit price or a successful IPO.
**6. What is Marc Andreessen’s educational background?**
Marc Andreessen graduated from the University of Illinois at Urbana-Champaign with a Bachelor of Science degree in Computer Science. He dropped out of the graduate program at the University of Illinois to pursue his entrepreneurial ventures.
**7. What are some of the notable investments made by Andreessen Horowitz?**
Some of the notable investments made by Andreessen Horowitz include Facebook, Twitter, Airbnb, Uber, and Coinbase. They have also invested in many other successful startups across various tech sectors.
**8. What is Marc Andreessen’s involvement in cryptocurrency?**
Marc Andreessen is a prominent supporter of cryptocurrency and blockchain technology. Andreessen Horowitz has invested in several cryptocurrency and blockchain startups, and the firm has a dedicated crypto fund called a16z crypto.
**9. What is Marc Andreessen’s stance on net neutrality?**
Marc Andreessen is a strong advocate for net neutrality. He has written extensively about the importance of net neutrality and has been vocal about his support for regulations that protect it.
**10. What are some of Marc Andreessen’s philanthropic efforts?**
Marc Andreessen and his wife Laura Arrillaga-Andreessen have made significant donations to various charitable causes, including education, health, and poverty alleviation. They have also established the Marc and Laura Andreessen Foundation to support these efforts.
