Slack Is Fetching High Prices in Private Stock Deals Ahead of Public Offering

On private markets, shares of the workplace software maker are going for as much as double its valuation last year.

A menu in the chat service app SlackPhotographer: Chris Ratcliffe/Bloomberg
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In the next few months, anyone will be able to buy stock in Slack Technologies Inc. In the meantime, wealthy investors are paying big premiums to snap up shares of the workplace software maker on private markets.

Investors are buying stock in some cases for more than double the price of Slack’s last fundraising round in August, which valued the company at $7.1 billion, said people familiar with the transactions. Shareholders have sold stock to private buyers in the last two months at prices as high as $25 or $26 a share, which implies a company valuation of about $16 billion, said two of the people, who asked not to be identified because the details are private. A third person said deals were discussed at a price range of $24 to $27 a share.