Sebastian Marcin Siemiatkowski
Founder at FLAT CAPITAL AB
Net worth: 17 M $ as of 30/03/2024
Profile
Sebastian Marcin Siemiatkowski founded Klarna Holding AB in 2005, where he is working as Chief Executive Officer & Director from 2010, Klarna, Inc. in 2005, where he is working as Chief Executive Officer & Director from 2005, Klarna Bank AB in 2005, where he is working as Chief Executive Officer & Director from 2010, and Flat Capital AB in 2013, where he is working as Chairman from 2013.
Mr. Siemiatkowski also currently works at Klarna UK Ltd., as Director from 2013.
Mr. Siemiatkowski also formerly worked at Djuice, as Head-Sales.
Mr. Siemiatkowski received his graduate degree in 2007 from Stockholm School of Economics.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
FLAT CAPITAL AB CLASS B
19.09% | 29/09/2023 | 8,212,121 ( 19.09% ) | 11 M $ | 30/03/2024 |
FLAT CAPITAL AB
inf% | 29/09/2023 | 4,429,222 ( inf% ) | 6 M $ | 30/03/2024 |
Sebastian Marcin Siemiatkowski active positions
| Companies | Position | Start |
|---|---|---|
| FLAT CAPITAL AB | Founder | 29/08/2013 |
Klarna Holding AB
 Klarna Holding AB Miscellaneous Commercial ServicesCommercial Services Klarna Holding AB provides electronic commerce payment solutions. Its services allows consumers to make online purchases using electronic mail address and postcode. The firm's software also allows clients to have a product delivery before paying for it. The company was founded by Sebastian Marcin Siemiatkowski, Gustav Erik Niklas Adalberth, and Karl Anders Victor Jacobsson in 2005 and is headquartered in Stockholm, Sweden. | Founder | 31/12/2004 |
Klarna, Inc.
 Klarna, Inc. Miscellaneous Commercial ServicesCommercial Services Klarna, Inc. provides online payment solutions to e-stores. Its technology lets buyers receive ordered goods before any payment is due. The company was founded by Sebastian Siemiatkowski, Victor Jacobsson, and Niklas Adalberth in 2005 and is headquartered in Columbus, OH. | Founder | 31/12/2004 |
Klarna UK Ltd.
 Klarna UK Ltd. Miscellaneous Commercial ServicesCommercial Services Part of Klarna Holding AB, Klarna UK Ltd. is a private company that makes online shopping simple by offering ways to pay later. The company is based in London, UK. The Klarna card, accepted everywhere Visa is accepted, lets users manage their purchases individually in the Klarna app and choose to pay now or pay monthly while tracking their spending over time. Founded in 2013, the British company provides a safe and effortless shopping experience through its app, which allows users to discover, share, and shop for the things they love. | Director/Board Member | 25/09/2013 |
Klarna Bank AB
 Klarna Bank AB Regional BanksFinance Klarna Bank AB provides payment solutions. It offers direct payments, pay after delivery options, and installment plans. The company was founded by Sebastian Marcin Siemiatkowski, Gustav Erik Niklas Adalberth, and Karl Anders Victor Jacobsson in 2005 and is headquartered in Stockholm, Sweden. | Founder | 31/12/2004 |
Former positions of Sebastian Marcin Siemiatkowski
| Companies | Position | End |
|---|---|---|
| Djuice | Sales & Marketing | - |
Training of Sebastian Marcin Siemiatkowski
| Stockholm School of Economics | Graduate Degree |
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Listed companies | 1 |
|---|---|
| FLAT CAPITAL AB | Finance |
| Private companies | 5 |
|---|---|
Klarna Holding AB
Klarna Holding AB Miscellaneous Commercial ServicesCommercial Services Klarna Holding AB provides electronic commerce payment solutions. Its services allows consumers to make online purchases using electronic mail address and postcode. The firm's software also allows clients to have a product delivery before paying for it. The company was founded by Sebastian Marcin Siemiatkowski, Gustav Erik Niklas Adalberth, and Karl Anders Victor Jacobsson in 2005 and is headquartered in Stockholm, Sweden. | Commercial Services |
| Djuice | |
Klarna, Inc.
Klarna, Inc. Miscellaneous Commercial ServicesCommercial Services Klarna, Inc. provides online payment solutions to e-stores. Its technology lets buyers receive ordered goods before any payment is due. The company was founded by Sebastian Siemiatkowski, Victor Jacobsson, and Niklas Adalberth in 2005 and is headquartered in Columbus, OH. | Commercial Services |
Klarna Bank AB
Klarna Bank AB Regional BanksFinance Klarna Bank AB provides payment solutions. It offers direct payments, pay after delivery options, and installment plans. The company was founded by Sebastian Marcin Siemiatkowski, Gustav Erik Niklas Adalberth, and Karl Anders Victor Jacobsson in 2005 and is headquartered in Stockholm, Sweden. | Finance |
Klarna UK Ltd.
Klarna UK Ltd. Miscellaneous Commercial ServicesCommercial Services Part of Klarna Holding AB, Klarna UK Ltd. is a private company that makes online shopping simple by offering ways to pay later. The company is based in London, UK. The Klarna card, accepted everywhere Visa is accepted, lets users manage their purchases individually in the Klarna app and choose to pay now or pay monthly while tracking their spending over time. Founded in 2013, the British company provides a safe and effortless shopping experience through its app, which allows users to discover, share, and shop for the things they love. | Commercial Services |
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