Andreessen Horowitz
Andreessen Horowitz (a16z) is a direct investment firm based in Menlo Park, California. Founded in 2009, a16z founded by Marc Andreessen and Ben Horowitz specializes in seed, early-stage, mid-stage, later-stage, and growth-stage investments. a16z seeks to invest in media, software, mobile, internet, cloud computing, infrastructure, data storage, and technology sectors. The assets of the firm are managed by the executive management team.
322companies
6lead
6follow-on
Portfolio Companies
322 companies
Kalshi
Lead
Other Financial Services
Dec 2025
2x
Kalshi
Lead
Other Financial Services·Dec 2025·2 rounds
Replit
Lead
Software Development Applications
Sep 2025
4x
Replit
Lead
Software Development Applications·Sep 2025·4 rounds
Mistral AI
Lead
Software Development Applications
Sep 2025
3x
Mistral AI
Lead
Software Development Applications·Sep 2025·3 rounds
Radiant
Lead
Alternative Energy Equipment
May 2025
2x
Radiant
Lead
Alternative Energy Equipment·May 2025·2 rounds
Flock Safety
Lead
Electronic Equipment and Instruments
Mar 2025
4x
Flock Safety
Lead
Electronic Equipment and Instruments·Mar 2025·4 rounds
xAI
Lead
Business/Productivity Software
Nov 2024
2x
xAI
Lead
Business/Productivity Software·Nov 2024·2 rounds