Finance

Klarna CEO Unites $1 Billion Stake to Fuel Bets Outside Fintech

Sebastian Siemiatkowski during the Klarna Group IPO at the New York Stock Exchange, on Sept. 10. — Sebastian Siemiatkowski during the Klarna Group IPO at the New York Stock Exchange, on Sept. 10.
Photographer: Michael Nagle/Bloomberg

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By Aisha S Gani and Benjamin Stupples

September 17, 2025 at 8:04 AM UTC

Updated on

September 17, 2025 at 1:09 PM UTC

Klarna Group Plc Chief Executive Officer Sebastian Siemiatkowski is overhauling how he controls his roughly $1.1 billion stake in the financial technology firm, lining up a major revamp for his biggest asset just days after its listing in New York.

Flat Capital AB, the publicly listed investment firm Siemiatkowski controls with his wife and other ultra-wealthy investors, proposed acquiring Double Sunday AB, which owns 6.5% of Klarna and is currently wholly owned by Siemiatkowski, according to a statement. The deal values Double Sunday at 9.5 billion Swedish kronor ($1.03 billion).