Investor profile
Greg Castle
Angel, Operator angel & Advisor at Marin Sonoma Impact Ventures, Managing Partner at Anorak Ventures
Greg Castle is an angel investor and operator angel based in Los Angeles, California, United States. The known portfolio counts 9 companies: Fondo, Bitmovin, Mux, 6D.ai, InsiteVR, Equally, Looking Glass Factory, Reduced Energy Microsystems and Simulon.
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Investment focus
Contacts
Greg Castle portfolio companies (9)
- Fondo
- Bitmovin
- Mux
- 6D.ai
- InsiteVR
- Equally
- Looking Glass Factory
- Reduced Energy Microsystems
- Simulon
Affiliated funds' portfolios
Advisor at Marin Sonoma Impact Ventures, whose known portfolio counts 10 companies
- Stackpack
- NewRetirement
- Channel99
- Union Credit
- Olarry
- Operant Networks
- Fire Aside
- Jump Aero
- PairUp
- Sageful AI
Managing Partner at Anorak Ventures, whose known portfolio counts 21 companies
- ZeroMark
- Mermaid Char
- NOX Metals
- Mermaid Chart
- Schemata
- JigSpace
- Level Zero Health
- Koobz
- StirlingX
- ZeroTier
- 2weeks
- Airfold
- and 9 more
Investor Profile
The known portfolio sits in sectors AI, Consumer, Hardware and SaaS, and focus areas 3D Technology, 3D Visualization, Cloud Infrastructure and Computer Vision.
Stage-wise, the known deals cluster around Pre-Seed, Seed and Series A rounds.
The portfolio and focus above give founders context on whether Greg Castle matches their raise.
Colleagues
Rob Das
Executive Network Member
Healdsburg, United States
Brett Kadesh
Executive Network Mentor
San Francisco, United States
Peter Freeman
Investor
San Francisco, United States
Charlie Leggate
Partner
San Francisco, United States
Beth Stelluto Dunaier
Strategic Advisor
Sonoma, United States
Zachary Kushel
Managing Partner
Corte Madera, United States
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Frequently asked questions
Who is Greg Castle?
Greg Castle is an angel investor and operator angel based in Los Angeles, California, United States with 9 known investments on file, among them Fondo, Bitmovin and Mux. The sections above list the sectors, stages and firms attached to that record.
What does Greg Castle invest in?
Listed sectors include AI, Consumer, Hardware and SaaS; listed focus areas include 3D Technology, 3D Visualization, Cloud Infrastructure and Computer Vision. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Greg Castle invest at?
The known deals of Greg Castle include Pre-Seed, Seed and Series A rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Greg Castle listed at?
Greg Castle is listed as Managing Partner at Anorak Ventures. 6 other people in the database share a firm with Greg Castle.
How do I contact Greg Castle?
An email address, a phone number and a LinkedIn page are on file for Greg Castle. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal