The Slack Technologies Inc. application is displayed in the App Store on an Apple Inc. iPhone in an arranged photograph taken in Arlington, Virginia, U.S. (Photographer: Andrew Harrer/Bloomberg)

Slack Expects $600 Million in Sales This Year

(Bloomberg) -- Slack Technologies Inc. expects growing revenue and higher-than-usual losses in the second quarter, the period in which it’s expected to go public via a direct listing, the company s...