Slack says it has submitted a confidential draft filing to go public with the SEC
Lauren Feiner / CNBC :
Context & Ripple Effects
Slack's confidential draft filing caps a preparation arc that began when sources reported in September 2018 that it was gearing up for a first-half 2019 IPO at a valuation above $7B. In January, reporting shifted the expected structure: rather than a traditional underwritten offering, Slack would pursue a direct listing, likely debuting in Q2.
The confidential submission is the procedural step that makes either path possible — it lets Slack clear SEC review before exposing its financials publicly, which matters because its eventual prospectus showed heavy losses against fast-growing revenue.
First-order effects
- Slack gains a regulatory head start: it can complete SEC review and gauge interest privately while its finances stay out of competitors' hands until the prospectus drops.
- The filing locks in the timeline from the January reporting — a public debut by mid-2019 — turning months of sourced speculation into a formal process.
Second-order effects
- By pursuing a direct listing instead of a traditional IPO, Slack skips the underwritten roadshow, meaning no new primary capital is raised and existing shareholders' stock hits the NYSE directly — a structure whose viability Slack's debut will test for other late-stage software companies.
- When the prospectus surfaced in April, it disclosed a $138M loss on $400M FY2019 revenue (versus a $140M loss on $220M the year before), giving public investors their first hard read on whether collaboration-software growth can outrun burn.
Third-order effects
- If Slack's direct listing succeeds, it strengthens the case that scaled, cash-generative-enough startups can reach public markets without investment banks pricing and underwriting the deal — shifting leverage toward companies and early holders.
- Confidential draft filings are becoming the default first move for high-profile tech listings, decoupling the regulatory review timeline from the publicity cycle and letting companies time disclosure to market windows.
The trend: Late-stage enterprise software companies are increasingly choosing confidential filings and direct listings over traditional bank-underwritten IPOs as their route to public markets.