X0609 4 2026-04-24 0 0000063276 MATTEL INC /DE/ MAT 0001474865 Hugh Yoon J. false 333 CONTINENTAL BOULEVARD EL SEGUNDO CA 90245 0 1 0 0 SVP & Corporate Controller 0 Common Stock 2026-04-24 4 M 0 4169 A 34535 D Common Stock 2026-04-24 4 F 0 1496 14.54 D 33039 D Restricted Stock Units 2026-04-24 4 M 0 4169 0 D Common Stock 4169 4296 D As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 12,633 Restricted Stock Units ("RSUs" or "Units") on April 25, 2024. The RSUs vest 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 will receive one share of Mattel, Inc. Common Stock, subject to tax withholding. On April 24, 2026, the second 33% of these RSUs vested, resulting in the issuance of 4,169 shares of Mattel, Inc. Common Stock. Pursuant to the terms of the April 25, 2024 RSU grant, 1,496 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding. /s/ Tiffani Magri, Attorney-in-Fact for Yoon J. Hugh 2026-04-28