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Castle

Castle Fund I, L.P.

RaisingEmerging manager

Raising: Form D reports no first sale yet

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Vintage
Unknown
Fund size
$20M (Form D)
Stages
Seed
Sectors
Biotech, Energy, Aerospace and defense, Robotics, Semiconductors
Regions
Not stated

01 · Thesis

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

02 · Initial check

$200K to $333K (estimated from fund size)

Estimated from Form D

03 · Who to approach

Named on this fund's Form D

  • Daniel Gould, Managing Partner

04 · Deals

No deals attributed to this fund yet.

05 · Evidence

  • Firm-wideCastle Fund is dedicated to advancing groundbreaking solutions in biotech, energy, aerospace, robotics, and chips.

    Castle Fund is dedicated to advancing groundbreaking solutions in biotech, energy, aerospace, robotics, and chips.
    https://www.castle-fund.com/

06 · Sources

  1. https://www.castle-fund.com/
  2. https://www.sec.gov/Archives/edgar/data/2098129/000209812925000001/

Last verified: Oct 28, 2026