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Re:Twitter shares drop as Salesforce reported to be out of t... by the_watcher on Friday October 14, 2016 @04:50PM (#12710997)
Twitter employees can't currently sell stock? I was unaware of this.
Re:Twitter shares drop as Salesforce reported to be out of t... by murph on Saturday October 15, 2016 @03:01PM (#12715224)
They can only trade one month out of three. Specifically, they can trade immediately after quarterly earnings.

This is pretty common amongst similar companies.