Sebastian Siemiatkowski

Co-Founder / CEO, Klarna
Greater Stockholm Metropolitan Area,Sweden
Find Sebastian Siemiatkowski's Email
Find Sebastian Siemiatkowski's Phone

Who Is Sebastian Siemiatkowski?

Total Experience24 years
CompanyKlarna
CountrySweden

Sebastian Siemiatkowski is a prominent Polish-Swedish entrepreneur best known as the co-founder and Chief Executive Officer of the global fintech powerhouse, Klarna. Born in Sweden to Polish immigrants, he attended the Stockholm School of Economics before launching Klarna in 2005 with his co-founders. Under his leadership, Klarna has grown from a fledgling startup into a leading payments provider and shopping service, pioneering the 'buy now, pay later' (BNPL) model. Siemiatkowski has successfully navigated the company through massive international expansion and significant funding rounds, establishing Klarna as one of the most valuable private tech companies in Europe. He is widely regarded as a visionary leader in the financial technology sector, continuously pushing for innovation in how people shop and manage their finances.

How Did Sebastian Siemiatkowski's Career Path Shape Their Journey?

Sebastian Siemiatkowski's work history includes a series of influential roles in various companies. Here is a detailed list of his professional journey:

Klarna - Co-Founder / CEO(2005 to Present)
SSE Business Lab - Advisory Board Member(2015 to 2019)

What Are Sebastian Siemiatkowski's Key Achievements?

Co-founder and CEO of Klarna

Co-founded Klarna in 2005 and scaled it into a leading global payments and shopping service, revolutionizing the 'buy now, pay later' industry and serving over 150 million active consumers worldwide.

Pioneer of the 'Buy Now, Pay Later' Movement

Spearheaded the global adoption of the 'buy now, pay later' (BNPL) model, fundamentally transforming the online checkout experience for millions of consumers and merchants worldwide.

World Economic Forum Young Global Leader

Recognized as a Young Global Leader by the World Economic Forum for his significant contributions to the fintech industry and his leadership in building one of Europe's most successful technology companies.

What's Sebastian Siemiatkowski's Educational Background?

Bachelor's degree, Economics

Stockholm School of Economics - Year 2000

Buying Intent Signals for Sebastian Siemiatkowski

Highperformr Signals uncover buying intent and give you clear insights to target the right people at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance

Company Overview

Klarna
Total employees5000
HeadquartersStockholm
Founded2005

Klarna is a Swedish fintech company primarily known for its 'buy now, pay later' (BNPL) services. From an end-user's perspective, it offers a seamless way to shop online by allowing customers to split payments into interest-free installments or pay for their purchase after delivery. Integrated into thousands of retail websites, Klarna also provides a comprehensive shopping app that includes features like price tracking, exclusive deals, and managing payments and returns in one place, positioning itself as an all-in-one shopping assistant.

Klarna Funding Information
Unknown - Total Funding Raised
$800M - Most recent funding amount
18 - Number of funding rounds
11 Jul, 2022 - Latest funding round
Lead Investors:
Sequoia Capital
Silver Lake
SoftBank Vision Fund 2
Visa
Permira
Ant Group
Commonwealth Bank of Australia

Highperformr's free tools for company research

Find contact info

Get verified emails, phone numbers, and LinkedIn profile details

Find similar contacts

Discover contacts with similar roles, seniority, or companies

Perform deep contact research

Uncover insights like skills, work history, social links, and more

Discover, research and enrich contacts with Highperformr — Smarter, Faster

Explore contacts in-depth — from verified emails and phone numbers to LinkedIn activity, job changes, and more — all in one powerful view.

Highperformr AI helps you surface the right people and enrich your CRM with live, accurate contact insights so your teams can connect faster and close smarter.

  • Track signals like job change, promotion, and LinkedIn activity
  • Enrich contacts with verified email, phone, and social data instantly
  • Automate enrichment and updates with powerful workflows
  • Sync enriched contact info directly into your CRM and tools

Thousands of contacts — including decision-makers, influencers, and ICP matches — are just a search away.

Thousands of companies, including, are just a search away.