X0306 4 2022-04-08 1 0001889658 Magallanes, Inc. NONE 0001423061 Desroches Pascal C/O MAGALLANES, INC. ONE AT&T PLAZA, 208 SOUTH AKARD STREET DALLAS TX 75202 1 1 0 0 See Remarks Common Stock 2022-04-08 4 D 0 221497 D 0 D Common Stock 2022-04-08 4 D 0 16920 D 0 D Common Stock 2022-04-08 4 D 0 4320.371 D 0 I By 401(k) Represents 242,737.371 shares of the Issuer's common stock acquired by the Reporting Person in a pro rata distribution by AT&T Inc. ("AT&T") to holders of its common stock for no consideration, which occurred on April 8, 2022 in a transaction exempt under Rules 16a-9 and 16b-3 of the Securities Exchange Act of 1934, as amended (the "Distribution"). Following the Distribution, each share of the Issuer's common stock was disposed of pursuant to the Agreement and Plan of Merger between AT&T, the Issuer, Discovery, Inc. (renamed Warner Bros. Discovery, Inc. ("WBD") in connection with the merger) and Drake Subsidiary, Inc., in exchange for 58,721 shares of WBD common stock, in the aggregate, having a market value of $24.78 per share on April 11, 2022. Chief Executive Officer and Chief Financial Officer /s/ Pascal Desroches 2022-04-12