Castle

Emerging manager

Built from this firm's Form D filings. The firm files no SEC adviser report.

Website: https://www.castle-fund.com
HQ: CA

Castle is dedicated to advancing groundbreaking solutions in biotech, energy, aerospace, robotics, and chips. Its people listed include Daniel Gould, Managing Partner, and Joe Turner, Venture Partner. Other listed contributors include Chris Harvey, Emerging Fund Attorney, Jake Russell, LPAC IP Advisor, Jaimes Sher, Patent Attorney, Niko McCarty, Founder of Asimov Press, and Ian Sobieski, Founder and Chairman of Band of Angels.

01 · Says / Does

Tag	Says	Does
Stages	Seed	Not enough dated deals
Sectors	Biotech, Energy, Robotics, Semiconductors, Aerospace and defense	Not enough dated deals
Regions	Not stated	Not enough dated deals

Says: what the firm's funds state. Does: from 0 dated deals in the last 24 months.

02 · Fund history

Fund	Year	Size	Status
Castle Fund I, L.P. Seed fund for deep tech startups with strong IP, investing across biotech, energy, aerospace, robotics, and chips. Seeks founders securing patents, trade secrets and partnerships that create lasting impact. Inferred from the firm's website	approx. 2025	$20M (Form D)	Raising

03 · People across funds

Daniel Gould, Managing Partner
Castle Fund I, L.P. (Named on Form D)
Chris Harvey, Emerging Fund Attorney
Castle Fund I, L.P. (Team)
Ian Sobieski, Founder / Chairman, Band of Angels
Castle Fund I, L.P. (Team)
Jaimes Sher, Patent Attorney · Owner, IP Excellence
Castle Fund I, L.P. (Team)
Jake Russell, LPAC IP Advisor
Castle Fund I, L.P. (Team)
Joe Turner, Venture Partner
Castle Fund I, L.P. (Team)
Niko McCarty, Founder, Asimov Press · Fellow, Astera Institute
Castle Fund I, L.P. (Team)

04 · Recent deals

No dated deals found yet.

05 · Latest from the firm

No news from the firm's website yet.

06 · Sources

Fund dates and sizes are from SEC Form D filings.

Last verified: Oct 28, 2026