[tomas789]

There are rules like that. For example executives cannot buy/sell stocks of their companies around the major announcements like financial results. Most of the time internal compliance department just sets a windows in which it is safe to do such transactions.

As for the announcements one usually has to announce before the transaction is made (again compliance reasons) but then you don’t want to wait because the price tends to move against you with such announcements. This is why the real trades were likely executed just seconds after the announcement.