$20M Seed fund for deep tech with IP moats

Empowering tomorrow’s deep tech leaders

Fueling the Future with Innovation

Castle Fund is dedicated to advancing groundbreaking solutions in biotech, energy, aerospace, robotics, and chips.

We seek founders securing patents, trade secrets and partnerships that create lasting impact.

Redfin (82X IPO), Yassir (10X secondary), Volumetric (acq. by 3D Systems), Hypoint (acq. by ZeroAvia)

Sophia Space – data centers in space

Arinna – solar panels with 10X power density

Rejuvenation Technologies – Telomere therapeutics for longevity

Axiom Space – world’s first commercial space station

	Daniel Gould (Managing Director): Ex-founder, prior Venture Partner at Asymmetry Ventures (deep tech fund), manages 5k LP AngelList syndicate (100+ deals, $20M+ AUM), and has two decades of legal and BD experience in IP licensing and distribution.
	Joe Turner (Venture Partner): Ex-Blackstone, fractional CFO for biotech startups, and venture partner for multiple deep tech funds; raised $10M for 20+ AngelList deals at Jolt VC.
	Jake Russell (LPAC IP Advisor): Two decades in software engineering, venture innovation, and patent portfolio development at organizations including Intellectual Ventures and Xinova, and technical advisor to the law firm Perkins Coie.