Shares of Medline, a medical-supplies manufacturer and distributor, rose 41% in their trading debut Wednesday after the company raised $6.26 billion in the largest U.S. initial public offering since 2021. The fundraising dethrones Chinese battery maker Contemporary Amperex Technology as this year’s biggest. In fact, Medline’s IPO is the biggest since Rivian’s in November 2021, according to Renaissance Capital.