Investor profile
Nicolaj Reffstrup
Angel & Venture Partner at Giant Ventures, Founding Partner at Look Up Ventures
Nicolaj Reffstrup is an angel investor based in Copenhagen, Denmark with 6 known investments: Rubi Laboratories, Medusa, Reflaunt, Seasony, Claimlane and PUFIN-ID.
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Investment focus
- Focus
- BiotechClean Energy
Contacts
Nicolaj Reffstrup portfolio companies (6)
- Rubi Laboratories
- Medusa
- Reflaunt
- Seasony
- Claimlane
- PUFIN-ID
Affiliated funds' portfolios
Venture Partner at Giant Ventures, whose known portfolio counts 10 companies
- Radiant
- CuspAI
- Haven Energy
- Matta
- Pano
- Carbon Robotics
- Cosmic Robotics
- SHIELD
- Amass Technologies
- GridFree AI
Founding Partner at Look Up Ventures, whose known portfolio counts 2 companies
- Sirona Technologies
- Reshape Biotech
Investor Profile
The listing covers sectors Climate and Hardware, and focus areas Biotech and Clean Energy. Startups operating in these areas may find Nicolaj Reffstrup relevant.
Stage-wise, the known deals cluster around Pre-Seed and Seed rounds.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
Colleagues
Tommy Ahlers
Venture Partner
Copenhagen, Denmark
Grant Allen
Board Partner
San Francisco, United States
Will Dufton
Partner
London, United Kingdom
Tommy Stadlen
Founding Partner
London, United Kingdom
Dhaval Chadha
Venture Scout
São Paulo, Brazil
Cameron McLain
Co-Founder & Managing Partner
London, United Kingdom
Jia Lin Yong
Investor
Mohadeseh A.
Partner
London, United Kingdom
Madelene Larsson
Investor
United Kingdom
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Frequently asked questions
Who is Nicolaj Reffstrup?
Nicolaj Reffstrup is an angel investor based in Copenhagen, Denmark with 6 known investments on file, among them Rubi Laboratories, Medusa and Reflaunt. The sections above list the sectors, stages and firms attached to that record.
What does Nicolaj Reffstrup invest in?
Listed sectors include Climate and Hardware; listed focus areas include Biotech and Clean Energy. 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 Nicolaj Reffstrup invest at?
The known deals of Nicolaj Reffstrup include Pre-Seed and Seed 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 Nicolaj Reffstrup listed at?
Nicolaj Reffstrup is listed as Venture Partner at Giant Ventures. 9 other people in the database share a firm with Nicolaj Reffstrup.
How do I contact Nicolaj Reffstrup?
An email address and a LinkedIn page are on file for Nicolaj Reffstrup. The address stays masked on this page and is readable inside RaiseHunt after you create an account. The database holds no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal