This post is by Jason Lemkin from SaaStr
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I don’t know and can’t find a great answer on-line, but my simple guess is:
- “WORK” was soft held for another potential IPO or company. NYSE and Nasdaq often save certain ticker symbols for potential listings.
- NYSE told Slack they could probably get it, but needed/wanted a formal approval to give it to them.
- Slack then registered for SK temporarily, and as soon as NYSE get them approval, they switched.