Medline Inc. shares surged 41% in their trading debut, after the medical supplier raised $6.26 billion in the year’s biggest initial public offering. The shares closed at $41 each on Wednesday in New York, versus the IPO price of $29. Medline, which counts Blackstone Inc., Carlyle Group Inc. and Hellman & Friedman among its backers, sold 216 million shares in an upsized offering that priced near the top of the marketed range. Most Read from Bloomberg The trading gives the company a market value of abou ...