9 sep 2024 stock market quotes, business news, financial news, trading ideas, and stock research by professionals. 21 jun 2019 cal henderson is sitting on a fortune of more than 550m. Fellow slack founder and boss stewart butterfield's 43. 2m shares were worth an estimated 1. 4bn at one stage Cal henderson is the chief technology officer of slack technologies inc. He's one of the most successful brits in silicon valley and slack is now valued at $3. 8bn.
Whether or not that job was actually.
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