First of all, congratulations Slack on the IPO!

Experimenting with a new type of article: breakdown of S-1s.

Here are my biggest takeaways from Slack’s recently filed S-1.

  • The initially filed an S-1 in Feband then amended it filing again during the week of May 20th. Changes included an amendment to their maximum aggregate offering price ($196M amended one), their ticker symbol (WORK).
  • Total number of registered developers = 500k+, total number of organizations is around 600k+. It’s interesting that the number of…