Axios Pro Exclusive ContentIllustration: Sarah Grillo/AxiosKlarna, the Swedish buy now, pay later giant, on Friday filed for a U.S. IPO.Why it matters: It's the first big consumer fintech to test the markets since Ibotta last April, and reportedly will seek a $15 billion valuation.By the numbers: Klarna, which plans to trade under KLAR on the NYSE, reported a $21 million net profit on $2.8 billion in revenue for 2024, compared to a net loss of $244 million on $2.3 billion in revenue the year pri...