MAT

SEC source: 0001474865-26-000003 · wk-form4_1770852343.xml · nonDerivative · entry 1

Hugh Yoon J. · CIK 0001474865 · SVP & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,191

SEC source: 0001661969-26-000003 · wk-form4_1770852289.xml · nonDerivative · entry 2

Anschell Jonathan · CIK 0001661969 · EVP Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,626

F1 · shares: Represents shares of Mattel, Inc. Common Stock that were automatically withheld to cover required tax withholding.

SEC source: 0001661969-26-000003 · wk-form4_1770852289.xml · nonDerivative · entry 1

Anschell Jonathan · CIK 0001661969 · EVP Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 121,186

SEC source: 0001523711-25-000091 · wk-form4_1748985734.xml · derivative · entry 2

Ruh Paul · CIK 0001967445 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,578

Underlying: Common Stock · 74,578 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 30, 2025 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-25-000091 · wk-form4_1748985734.xml · derivative · entry 1

Ruh Paul · CIK 0001967445 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 200,634

Underlying: Common Stock · 200,634 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 30, 2025 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-25-000090 · wk-form4_1748985666.xml · derivative · entry 3

Ancira Karen · CIK 0002024410 · EVP, Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,896

Underlying: Common Stock · 16,694 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated May 31, 2024 and filed on June 4, 2024, the Reporting Person received a grant of 50,590 Restricted Stock Units ("RSUs" or "Units") on May 31, 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 May 30, 2025, the first 33% of these RSUs vested, resulting in the issuance of 16,694 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 31, 2024 and filed on June 4, 2024, the Reporting Person received a grant of 50,590 Restricted Stock Units ("RSUs" or "Units") on May 31, 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 May 30, 2025, the first 33% of these RSUs vested, resulting in the issuance of 16,694 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 31, 2024 and filed on June 4, 2024, the Reporting Person received a grant of 50,590 Restricted Stock Units ("RSUs" or "Units") on May 31, 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 May 30, 2025, the first 33% of these RSUs vested, resulting in the issuance of 16,694 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000090 · wk-form4_1748985666.xml · nonDerivative · entry 2

Ancira Karen · CIK 0002024410 · EVP, Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,720

F2 · shares: Pursuant to the terms of the May 31, 2024 RSU grant, 5,974 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000090 · wk-form4_1748985666.xml · nonDerivative · entry 1

Ancira Karen · CIK 0002024410 · EVP, Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,694

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated May 31, 2024 and filed on June 4, 2024, the Reporting Person received a grant of 50,590 Restricted Stock Units ("RSUs" or "Units") on May 31, 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 May 30, 2025, the first 33% of these RSUs vested, resulting in the issuance of 16,694 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000086 · wk-form4_1748643921.xml · derivative · entry 1

Olian Judy D. · CIK 0001605729 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000085 · wk-form4_1748643816.xml · derivative · entry 1

NG DOMINIC · CIK 0001201236 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000087 · wk-form4_1748644053.xml · derivative · entry 1

OSTROFF DAWN · CIK 0001815563 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000084 · wk-form4_1748643688.xml · derivative · entry 2

Lynch Roger · CIK 0001476295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,992

Underlying: Common Stock · 9,195 shares

Expires not disclosed

F3 · derivative.exercise_price: Distributions from the Reporting Person's phantom stock account will be in the form of shares of Mattel, Inc. Common Stock equal in value to the value of the phantom stock account.

F4 · derivative.exercise_date: The phantom stock units will be settled in shares of Mattel, Inc. Common Stock following the Reporting Person's separation from service with Mattel, Inc.

F4 · derivative.expiration_date: The phantom stock units will be settled in shares of Mattel, Inc. Common Stock following the Reporting Person's separation from service with Mattel, Inc.

SEC source: 0001523711-25-000084 · wk-form4_1748643688.xml · derivative · entry 1

Lynch Roger · CIK 0001476295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000083 · wk-form4_1748643617.xml · derivative · entry 1

Laursen Soren T · CIK 0001740353 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000082 · wk-form4_1748643390.xml · derivative · entry 1

Hertz Noreena · CIK 0001807354 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000081 · wk-form4_1748643300.xml · derivative · entry 2

GENACHOWSKI JULIUS · CIK 0001184231 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,305

Underlying: Common Stock · 6,305 shares

Expires not disclosed

F3 · derivative.exercise_price: Distributions from the Reporting Person's phantom stock account will be in the form of shares of Mattel, Inc. Common Stock equal in value to the value of the phantom stock account.

F4 · derivative.exercise_date: The phantom stock units will be settled in shares of Mattel, Inc. Common Stock following the Reporting Person's separation from service with Mattel, Inc.

F4 · derivative.expiration_date: The phantom stock units will be settled in shares of Mattel, Inc. Common Stock following the Reporting Person's separation from service with Mattel, Inc.

SEC source: 0001523711-25-000081 · wk-form4_1748643300.xml · derivative · entry 1

GENACHOWSKI JULIUS · CIK 0001184231 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000080 · wk-form4_1748642978.xml · derivative · entry 1

FERGUSON DIANA SUE · CIK 0001275975 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000079 · wk-form4_1748642820.xml · derivative · entry 1

Cisneros Adriana · CIK 0001749229 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,196

Underlying: Common Stock · 9,196 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs") were granted on May 28, 2025, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. Each RSU represents a contingent right to receive one share of Mattel, Inc. Common Stock. The RSUs are accompanied by dividend equivalent rights.

F2 · derivative.exercise_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

F2 · derivative.expiration_date: The RSUs are fully vested on the date of grant. Vested RSUs generally will be settled on the third anniversary of the date of grant or such later date in accordance with the terms of the Mattel, Inc. Deferred Compensation Plan for Non-Employee Directors. On the settlement date, for each vested RSU, the Reporting Person will receive one share of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000069 · wk-form4_1748466408.xml · derivative · entry 2

Olian Judy D. · CIK 0001605729 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,843 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

SEC source: 0001523711-25-000069 · wk-form4_1748466408.xml · nonDerivative · entry 1

Olian Judy D. · CIK 0001605729 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,704

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

SEC source: 0001523711-25-000068 · wk-form4_1748466360.xml · derivative · entry 2

Lynch Roger · CIK 0001476295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,843 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

SEC source: 0001523711-25-000068 · wk-form4_1748466360.xml · nonDerivative · entry 1

Lynch Roger · CIK 0001476295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,190

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

SEC source: 0001523711-25-000067 · wk-form4_1748466312.xml · derivative · entry 2

Laursen Soren T · CIK 0001740353 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,843 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

SEC source: 0001523711-25-000067 · wk-form4_1748466312.xml · nonDerivative · entry 1

Laursen Soren T · CIK 0001740353 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,630

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

SEC source: 0001523711-25-000066 · wk-form4_1748466246.xml · derivative · entry 2

Cisneros Adriana · CIK 0001749229 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,843 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

SEC source: 0001523711-25-000066 · wk-form4_1748466246.xml · nonDerivative · entry 1

Cisneros Adriana · CIK 0001749229 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,075

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated May 25, 2022 and filed on May 27, 2022, the Reporting Person received a grant of 6,843 Restricted Stock Units ("RSUs") on May 25, 2022. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 23, 2025, 100% of these RSUs were settled, resulting in the issuance of 6,843 shares of Mattel Common Stock.

SEC source: 0001523711-25-000058 · wk-form4_1746824850.xml · derivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,198

Underlying: Common Stock · 85,198 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 7, 2025 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-25-000057 · wk-form4_1746824801.xml · derivative · entry 1

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,221

Underlying: Common Stock · 155,221 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 7, 2025 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-25-000056 · wk-form4_1746824745.xml · derivative · entry 1

Isaias Zanatta Roberto Jacobo · CIK 0001767603 · EVP & Chief Supply Chain Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,787

Underlying: Common Stock · 53,787 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 7, 2025 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-25-000055 · wk-form4_1746824699.xml · derivative · entry 1

Hugh Yoon J. · CIK 0001474865 · SVP & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,387

Underlying: Common Stock · 13,387 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 7, 2025 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-25-000054 · wk-form4_1746824467.xml · derivative · entry 1

Anschell Jonathan · CIK 0001661969 · EVP Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,464

Underlying: Common Stock · 44,464 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 7, 2025 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-25-000053 · wk-form4_1746824295.xml · derivative · entry 1

Ancira Karen · CIK 0002024410 · EVP, Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,949

Underlying: Common Stock · 22,949 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 7, 2025 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: 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 (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-25-000046 · wk-form4_1746138648.xml · derivative · entry 4

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,490 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 30,852 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 10,490 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 30,852 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 10,490 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 30,852 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 10,490 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000046 · wk-form4_1746138648.xml · nonDerivative · entry 2

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,403

F2 · shares: Pursuant to the terms of the April 29, 2022 RSU grant, 5,327 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000046 · wk-form4_1746138648.xml · nonDerivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,730

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 30,852 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 10,490 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000045 · wk-form4_1746138565.xml · derivative · entry 3

Isaias Zanatta Roberto Jacobo · CIK 0001767603 · EVP & Chief Supply Chain Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,294 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 18,511 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 6,294 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 18,511 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 6,294 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 18,511 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 6,294 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000045 · wk-form4_1746138565.xml · nonDerivative · entry 2

Isaias Zanatta Roberto Jacobo · CIK 0001767603 · EVP & Chief Supply Chain Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 131,715

F2 · shares: Pursuant to the terms of the April 29, 2022 RSU grant, 3,197 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000045 · wk-form4_1746138565.xml · nonDerivative · entry 1

Isaias Zanatta Roberto Jacobo · CIK 0001767603 · EVP & Chief Supply Chain Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,912

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 18,511 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 6,294 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000044 · wk-form4_1746138447.xml · derivative · entry 3

Hugh Yoon J. · CIK 0001474865 · SVP & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,448 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 7,199 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 2,448 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 7,199 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 2,448 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 7,199 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 2,448 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000044 · wk-form4_1746138447.xml · nonDerivative · entry 2

Hugh Yoon J. · CIK 0001474865 · SVP & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,215

F2 · shares: Pursuant to the terms of the April 29, 2022 RSU grant, 876 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000044 · wk-form4_1746138447.xml · nonDerivative · entry 1

Hugh Yoon J. · CIK 0001474865 · SVP & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,091

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 7,199 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 2,448 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000043 · wk-form4_1746138390.xml · derivative · entry 3

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,112 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 38,564 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 13,112 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 38,564 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 13,112 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 38,564 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 13,112 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000043 · wk-form4_1746138390.xml · nonDerivative · entry 2

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 229,455

F2 · shares: Pursuant to the terms of the April 29, 2022 RSU grant, 5,917 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000043 · wk-form4_1746138390.xml · nonDerivative · entry 1

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 235,372

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 38,564 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 13,112 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000042 · wk-form4_1746138333.xml · derivative · entry 3

Anschell Jonathan · CIK 0001661969 · EVP Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,819 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 20,053 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 6,819 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 20,053 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 6,819 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 20,053 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 6,819 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000042 · wk-form4_1746138333.xml · nonDerivative · entry 2

Anschell Jonathan · CIK 0001661969 · EVP Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,433

F2 · shares: Pursuant to the terms of the April 29, 2022 RSU grant, 3,463 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000042 · wk-form4_1746138333.xml · nonDerivative · entry 1

Anschell Jonathan · CIK 0001661969 · EVP Chief Legal Officer & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,896

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As reported on a Form 4 dated April 29, 2022 and filed on May 3, 2022, the Reporting Person received a grant of 20,053 Restricted Stock Units ("RSUs" or "Units") on April 29, 2022. 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 April 29, 2025, the final 34% of these RSUs vested, resulting in the issuance of 6,819 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000036 · wk-form4_1746055763.xml · derivative · entry 4

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,584

Underlying: Common Stock · 15,125 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: As reported on a Form 4 dated April 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 45,833 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. 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 28, 2025, the second 33% of these RSUs vested, resulting in the issuance of 15,125 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 45,833 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. 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 28, 2025, the second 33% of these RSUs vested, resulting in the issuance of 15,125 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 45,833 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. 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 28, 2025, the second 33% of these RSUs vested, resulting in the issuance of 15,125 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000036 · wk-form4_1746055763.xml · nonDerivative · entry 2

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,240

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 7,681 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.