Sebastian Siemiatkowski

Founder & CEO

Swedish entrepreneur born to Polish immigrant parents who co-founded Klarna in 2005 at age 23 while studying at Stockholm School of Economics. Has served as CEO since 2010 and led Klarna from a student project to its $15B+ NYSE IPO in September 2025.

Overview

Companies
1
Roles
Founder & CEO

Companies

1 company
Klarna $4.2B
Public Founder & CEO

Swedish fintech company and global leader in buy now, pay later (BNPL) payments, offering flexible payment solutions for online and in-store shopping across 150 million consumers and 500,000 merchants.

Founder data is compiled from company records, public announcements, and verified sources. Roles reflect current or most recent known positions.