https://www.reddit.com/r/Superstonk/comments/14pl47h/mainstar_moving_drs_shares_to_dtcc_account/

“Any investments currently held in a DRS position will be moved to Mainstar’s DTCC account.”

So checking Chives’ image: https://i.imgur.com/UjKYZfr.png

So it seems next GameStop Form 10-Q may be minus 1,270,566 shares (from 4/21/2023 shareholder list with 667 Mainstar IRA accounts).