Slack Technologies is moving closer to an initial public offering by preparing a prospectus that could be released as early as this week, according to a published report.

The company, which provides instant messaging services to businesses and groups, is one of a number of tech companies attempting to go public while stock markets remain in a receptive mood.

The Wall Street Journal, citing unnamed sources, reported that Slack has been putting the finishing touches on a prospectus that it hopes to release by Friday.

Hot IPOs this year have included Lyft (LYFT) , Zoom (ZOOM) and Pinterest (PINS) . Uber, likely to be among the biggest tech IPOs of the year, is also waiting in the wings.