//On Facebooks 15th anniversary, Zuckerberg says it will spend more on safety and security in 19 than it had revenue at its IPO, laments critics negative focus (Mark Zuckerberg)

On Facebooks 15th anniversary, Zuckerberg says it will spend more on safety and security in 19 than it had revenue at its IPO, laments critics negative focus (Mark Zuckerberg)

Slack says it has submitted a confidential draft IPO filing with the SEC  —  Slack confidentially filed to go public, according to a press release published Monday.  —  Slack is one of a number of tech IPOs expected in 2019, including Uber, Lyft and Airbnb.  —  Here is the full release from Slack: