Andreessen Horowitz (a16z)
Andreessen Horowitz (a16z) – Venture capital firm investing across technology sectors
About
Founded in 2009 by Marc Andreessen and Ben Horowitz, Andreessen Horowitz (a16z) is a privately held venture capital firm headquartered in Menlo Park, California. The firm manages over $100 billion in assets across multiple funds as of April 30, 2026. a16z invests in technology companies at various stages, from seed to growth, across sectors including artificial intelligence, bio + healthcare, consumer, crypto, enterprise, fintech, and games. The firm is known for its platform model, providing portfolio companies with resources in marketing, talent, legal, and policy to support their growth. Notable investments include Airbnb, Coinbase, and Substack. In January 2026, a16z raised over $15 billion for new funds, including a $6.75 billion growth fund. In June 2026, Anne Neuberger, former U.S. Deputy National Security Advisor for Cyber and Emerging Technologies, joined a16z as its first head of global affairs, reflecting the firm's expanding international focus.