Andreessen Horowitz raises $15 billion, doubling down on AI and defense startups

Andreessen Horowitz, also known as a16z, raised $6.75 billion for a growth fund aimed at scaling up startups, $1.7 billion for an AI infrastructure fund and $1.12 billion for another focused on investing in national interests like defense, housing and supply chain, it said.

VC fundraising remains challenging because of the poor exit performance of the past few years. Just $118.6 billion in new commitments were closed last year, nearly $100 billion lower than 2024. The number of new funds closed in 2025 was also the lowest in the past decade, according to PitchBook data.

A16z’s funding haul shows how the largest and scaled venture capital firms are still able to amass more capital from limited partners in a rather slow fundraising environment for VC firms.

AI and defense tech have emerged as bright spots with the U.S. doubling down on keeping its global technological lead amid growing competition from China. Marc Andreessen, co-founder at a16z, has been a prominent supporter and major donor to President Donald Trump, and an advisor to the administration’s Department of Government Efficiency (DOGE).

“The technology landscape that we will be investing into is… intensely competitive with China… At this moment of profound technological opportunity, it is fundamentally important for humanity that America wins,” said Ben Horowitz, a16z co-founder and general partner.

A16z was seeking to raise a roughly $20 billion megafund for AI-focused growth-stage investments, Reuters exclusively reported last April.

It is one of Silicon Valley’s biggest venture capital firms and has backed industry giants such as Facebook, Instagram, Coinbase and Lyft  making it a key force behind the global dominance of U.S. tech companies.

In its last major fundraising in April 2024, a16z raised $7.2 billion across five different funds. The firm currently has over $90 billion in assets under management across all its funds.