Inside the Klarna-Affirm Rivalry Reshaping One of the Biggest Fintech IPOs

Klarna CEO Sebastian SiemiatkowskiPhotographer: Chris Ratcliffe/Bloomberg
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Even by Sebastian Siemiatkowski’s standards, it’s been a wild month.

The chief executive officer of buy now, pay later giant Klarna Group Plc started March on a high when he formally filed to list his 20-year-old company.