Is Slack Really Worth $20 Billion? The office collaboration company's stock fell on its second trading day.

By Matthew McCreary

Drew Angerer | Getty Images

Slack shares opened at $38.50 on Thursday, the company's first day of trading, up 48 percent from a $26 reference price Wednesday. That massive win gave the San Francisco-based tech startup a $19.5 billion valuation, almost triple its private valuation of $7.1 billion. That seems like a high number, considering that Slack itself estimated the market for its industry (workplace collaboration services) at $28 billion in its offering paperwork.

Friday saw the startup fall back to earth, as Slack stock fell 3.63 percent to 37.22. However, the true question about Slack's value won't be determined in its first week of trading (just as Uber's fate wasn't decided by a disastrous IPO).

The BIZ Experiences Index™ as a whole was down slightly, falling 0.13 percent as Amazon, Comcast and Adobe Inc. saw losses on the day. The biggest declines on the day came from D.R. Horton (-2.28 percent), Boston Properties (-1.9 percent) and FedEx Corp. (-1.89 percent).

On the other side, Alexion Pharmaceuticals rose by 2.83 percent Victoria's Secret parent company L Brands rose by 2.8 percent on Friday followed by two clothing companies in Victoria's Secret parent company L Brands (2.8 percent) and Ralph Lauren Corp. (2.47 percent).

Related: Stock Market Hits New High Thanks to Fed Policy Shift

The BIZ Experiences Index™ collects the top 60 publicly traded companies founded and run by BIZ Experiencess. The BIZ Experiencesial spirit is a valuable asset for any business, and this index recognizes its importance, no matter how much a company has grown. These inspirational businesses can be tracked in real time on BIZ Experiences.com.

Matthew McCreary

BIZ Experiences Staff

Associate Editor, Contributed Content

Matthew McCreary is the associate editor for contributed content at BIZ Experiences.com.

Want to be an BIZ Experiences Leadership Network contributor? Apply now to join.

Science & Technology

OpenAI's Latest Move Is a Game Changer — Here's How Smart Solopreneurs Are Turning It Into Profit

OpenAI's latest AI tool acts like a full-time assistant, helping solopreneurs save time, find leads and grow their business without hiring.

Business Ideas

70 Small Business Ideas to Start in 2025

We put together a list of the best, most profitable small business ideas for BIZ Experiencess to pursue in 2025.

Money & Finance

These Are the Expected Retirement Ages By Generation, From Gen Z to Boomers — and the Average Savings Anticipated. How Do Yours Compare?

Many Americans say inflation prevents them from saving enough and fear they won't reach their financial goals.

Business News

'We Don't Negotiate': Why Anthropic CEO Is Refusing to Match Meta's Massive 9-Figure Pay Offers

Anthropic CEO Dario Amodei laid out his rationale on a recent podcast for why he will not play the competing offer game despite Meta CEO Mark Zuckerberg's attempts to poach AI talent.

Business News

Here's How Much Palantir Pays Its Top Tech Talent, From Software Engineers to AI Researchers

With stock up nearly 500% in a year, Palantir is booming. Here's how that translates into pay for its employees.

Business News

Apple Smashes Expectations With $94 Billion Quarter. Here's How the iPhone Maker Did It.

Apple just reported a significant revenue beat for its latest quarter, exceeding analyst expectations.