Buy now, pay later company Klarna is the latest fintech IPO to reach the stock market. Michael Nagle / Bloomberg via Getty Images Close Key Takeaways Shares of Klarna, a leading buy now, pay later firm, finished their first trading session Wednesday above their IPO price. The fintech company late Tuesday announced the sale of 34.4 million shares at $40 apiece in the closely- watched initial public offering. The stock, which trades using the ticker "KLAR," opened at$52, rising above $57 and slipping below$ ...