Slack Ends First Day of Trading Worth $21 Billion. Now the Hard Work Begins

Investors, say hello to the biggest tiny speck in the world.

A decade ago, serial entrepreneur Stewart Butterfield co-founded startup Tiny Speck, which made video games that ultimately failed to catch on. But instead of giving up, he refocused the company on a chat app that his small team had created to communicate among themselves.

On Thursday, shares in that business, renamed Slack Technologies, made an impressive public debut—closing at $38.62, 48% higher than the reference price set by the New York Stock Exchange on Wednesday. The company ended the day with a market value of $21 billion, or more than three times as much as retail giant Gap Inc.

Slack’s arrival on the New York Stock Exchange came through the unorthodox route of a direct listing rather than a conventional initial public offering. While many retail investors may not know the difference, Slack’s direct listing created uncertainty in the price at which it would start trading.

Instead of a definitive price recommended by Wall Street banks and approved by their corporate client, Slack had a reference price of $26 per share set by the NYSE. In the end, investors didn’t seem to care about the uncertainty.

Slack’s first-day pop is helping make June the strongest month for new tech stock offerings in some time. It also raises the pressure on the company to deliver continued growth and eventual profitability.

In that, said Michael Facemire, a vice president at market research firm Forrester, Slack faces some key challenges. One is to expand from its core tech industry clientele to more mainstream users. “They have to expand their reach to non-technical folks outside of the developer and the technologist crowd for them to grow their company to the extent they want,” he said.

While many Slack users praise its usefulness, especially compared to rival services, it’s difficult for those who haven’t used it to grasp its utility.

One way to expand its customer base is an old-fashioned one, Facemire said. “Some of it comes down to just good old enterprise sales. There’s a reason that companies like IBM and Microsoft and Oracle do so well: They know how to sell into the enterprise,” he said.

Other analysts believe that Slack is gaining some momentum in this area. “The adoption of Slack within enterprises is proving as viral as WhatsApp amongst consumers,” Dimitri Kallianiotis, an Atlantic Equities stock analyst, said in a research note Wednesday. Slack has an opportunity to become “the main hub used to access all applications, as WeChat has done so successfully in China,” he said.