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Castle Fund

Pacifica, Californiacastlefund.com

Overview

Castle Fund is a venture capital firm that invests in the biotech, energy, aerospace, robotics, chips, and AI infrastructure sectors.

Portfolio Companies

1

Website

Investments

Company	Date	Stage	Lead
Arinna	Mar 2026	Seed	Co-investor

Sector & Stage Mix

Industry, funding stage, and valuation band breakdowns.

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SeedSeries ASeries BGrowth

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Investment Activity

Yearly cadence, pace, and funding raised over time.

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2021

2022

2023

2024

2025

2026

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Firmographic Details

HeadquartersPacifica, California

Year FoundedN/A

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