Investor · SE
Sebastian Siemiatkowski
Co-founder and CEO of Klarna; Swedish angel investor in technology and fintech.
- Rounds led
- 0
- Rounds joined
- 2
- Companies backed
- 2
- Last activity
- 07 Aug 2026
- Type
- Angel
- Fund size
- —
- Sectors
- fintech, technology
- Stage focus
- seed, early
Portfolio
Capital in rounds led · —