Castle Fund
Overview
Castle Fund is a venture capital firm that invests in the biotech, energy, aerospace, robotics, chips, and AI infrastructure sectors.
Portfolio Companies
2
Website
castlefund.comInvestments
| Company | Date | Stage | Lead |
|---|---|---|---|
| Arinna | Mar 2026 | Seed | Co-investor |
| Overlord Labs, Inc. | Sep 2026 | Seed | Co-investor |
Sector & Stage Mix
Industry, funding stage, and valuation band breakdowns.
FAQ
Where is Castle Fund based?
Castle Fund is headquartered in Pacifica, California, United States.
When was Castle Fund founded?
Founding year information for Castle Fund is not publicly available.
How many portfolio companies does Castle Fund have?
Castle Fund has 2 portfolio companies in Caplight's dataset.
What are some companies in Castle Fund's portfolio?
Portfolio companies visible on Caplight include Arinna, Overlord Labs, Inc..
What was Castle Fund's most recent investment shown here?
Castle Fund's most recent investment in this portfolio sample was in Overlord Labs, Inc. in 2026.
What sectors does Castle Fund focus on?
Castle Fund focuses on Energy & Sustainability, Frontier & Industrial Tech, Frontier & Industrial Tech, AI, Data & Cloud Infrastructure.
What company stages does Castle Fund focus on?
Castle Fund typically invests at the Early stage.
What is Castle Fund's AUM?
Castle Fund's assets under management are estimated between $20.0M and $20.0M.