Siemens’ healthcare division, Siemens Healthineers, began trading on Germany’s stock exchange Friday, raising $5.2 billion (4.2 billion euros) by selling 15 percent of the company. Shares of were issued at 28 euros each but opened at 29.10 euros each. The initial public offering (IPO) has been in the works for months, with numerous reports indicating it could occur by the end of March. This is widely viewed as one of the biggest public equity offerings in the history of Germany’s stock market.

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