X0306 4 2022-07-31 0000063276 MATTEL INC /DE/ MAT 0001767603 Isaias Zanatta Roberto Jacobo 333 CONTINENTAL BOULEVARD EL SEGUNDO CA 90245 1 EVP & Chief Supply Chain Offr Common Stock 2022-07-31 4 M 0 11696 A 72217 D Common Stock 2022-07-31 4 F 0 5799 23.20 D 66418 D Restricted Stock Units 2022-07-31 4 M 0 11696 0 D Common Stock 11696 12050 D As reported on a Form 4 dated July 31, 2020 and filed on August 4, 2020, the Reporting Person received a grant of 35,441 Restricted Stock Units ("RSUs" or "Units") on July 31, 2020. The RSUs vested as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person received one share of Mattel, Inc. Common Stock, subject to tax withholding. On July 31, 2022, the second 33% of these RSUs vested, resulting in the issuance of 11,696 shares of Mattel, Inc. Common Stock. Pursuant to the terms of the July 31, 2020 RSU grant, 5,799 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding. /s/ Tiffani Magri, Attorney-in-Fact for Roberto Jacobo Isaias Zanatta 2022-08-02