- How Slack Made Other Startup CEOs Wealthy: Term SheetFortune
- Slack Technologies Shares Extend Gain After First-Day PopYahoo Finance
- Slack IPO: Huge Pop Unleashes Animal SpiritsSeeking Alpha
- Slack Ends First Day of Trading Worth $21 Billion. Now the Hard Work BeginsYahoo Finance
- Slack’s Non-IPO Went Pretty WellBloomberg
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