Slack Technologies Inc. signage is displayed outside of the New York Stock Exchange during the company’s initial public offering in New York, U.S. (Photographer: Michael Nagle/Bloomberg)

Slack Tops $19 Billion Value in Trading Debut After Shunning IPO

(Bloomberg) -- A parade of initial public offerings from Silicon Valley this year has garnered a mixed reception from investors. Slack Technologies Inc. took a different route on Thursday, and saw ...

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