Stefan Sonnenberg is a Managing Director at Investitionsbank Berlin, whose known portfolio counts 10 companies.
Is Stefan Sonnenberg a fit for your startup?
Paste your website. AI checks the fit and scores every other investor too.
Investment focus
Contacts
Affiliated funds' portfolios
Managing Director at Investitionsbank Berlin, whose known portfolio counts 10 companies
- Baobab
- Clare&me
- Level Nine
- akirolabs
- muffintech
- Quantune
- Sphaira
- Wonderz
- CyberTide
- PairToShare
Investor Profile
Stefan Sonnenberg is listed against sectors AI, Climate, Consumer and FinTech, and focus areas Analytics, Clean and Renewable Energy, Cloud Infrastructure and Content in the database.
Stage-wise, the deals at Investitionsbank Berlin cluster around Seed and Series A rounds.
What the affiliated firm has backed is the closest available signal on whether Stefan Sonnenberg is worth approaching.
Frequently asked questions
Who is Stefan Sonnenberg?
Stefan Sonnenberg is a government-backed investor based in Berlin, Germany, listed as Managing Director at Investitionsbank Berlin. The known portfolio of that firm counts 10 companies. That portfolio belongs to the firm, not to Stefan Sonnenberg personally.
What does Stefan Sonnenberg invest in?
Listed sectors include AI, Climate, Consumer and FinTech; listed focus areas include Analytics, Clean and Renewable Energy, Cloud Infrastructure and Content. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Stefan Sonnenberg invest at?
Investitionsbank Berlin appears in Seed and Series A rounds across its known deals, and Stefan Sonnenberg is listed there as Managing Director. 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 Stefan Sonnenberg listed at?
Stefan Sonnenberg is listed as Managing Director at Investitionsbank Berlin, whose known portfolio counts 10 companies.
How do I contact Stefan Sonnenberg?
A LinkedIn page is on file for Stefan Sonnenberg. It is readable inside RaiseHunt after you create an account. The database holds no email address and no phone number for this profile.
Skip the browsing. Let AI find your ideal investors in one minute.
Paste your startup website and AI picks your best-fit investors out of 135,000+ profiles.
Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal