GME Stock split has hidden protocol for dividend distribution.
The company announced plans to split its stock four-for-one later this month. Shareholders of record at the close of business on July 18 will receive three additional shares for every share owned via a stock dividend. The additional shares will be distributed on July 21.
Note this date: July 21
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On 9th of June 2021 GME released their prospectus filing to the NSYE with following remarks aimed to the DTCC & co. to properly distribute their dividends to their shareholders:

