Andreessen Horowitz Plans $20B AI Megafund Amid Global Surge in Investor Demand

Andreessen Horowitz is preparing to raise $20 billion for what would be the largest fund in its history, targeting growth-stage investments in U.S.-based artificial intelligence companies, according to sources cited by Reuters. The move aims to attract global capital from investors seeking exposure to American AI innovation, as geopolitical and economic shifts reshape tech investment dynamics.

Co-founders Marc Andreessen and Ben Horowitz are reportedly pitching the fund internationally, offering limited partners a single vehicle focused solely on AI. One source said the fund would also reserve capital for follow-on investments in portfolio companies like Databricks, xAI, and Mistral, underlining the firm’s deepening commitment to high-compute, next-generation AI infrastructure.