Empowering Tomorrow’s Deep Tech Leaders
$20M Seed fund for deep tech with wide IP moats
Fueling the Future with AI-Powered Technology Innovation
Castle Fund is dedicated to advancing groundbreaking solutions in biotech, energy, aerospace, robotics, chips and AI infra. We seek founders securing patents, trade secrets and partnerships that create lasting impact.
Winning Angel Track Record
Redfin (82X IPO), Yassir (10X secondary), Volumetric (acq. by 3D Systems), Hypoint (acq. by ZeroAvia)
178
Startups Backed
3.8X
MOIC
41%
IRR
14
Exits
Team of Deep Tech Experts
Daniel Gould (Managing Director): Ex-founder, prior Venture Partner at Asymmetry Ventures (deep tech seed fund), manages a 5k LP AngelList syndicate (100+ deals, $20M+ AUM), and has decades of legal and BD experience in IP licensing and distribution.
Venture Partner was ex-Blackstone, fractional CFO for biotech startups, and venture partner for multiple funds.
GP advisor was GP of a deep tech Series A Fund that co-invested with Daniel’s prior fund, has a 7.2X MOIC and 2.8X DPI as an angel investor, and is a global celebrity.
Affiliates:
Portfolio
Sophia Space – data centers in space 