MAT

SEC source: 0001523711-25-000036 · wk-form4_1746055763.xml · nonDerivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,921

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 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: 0001523711-25-000035 · wk-form4_1746055706.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: 14,545

Underlying: Common Stock · 14,117 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 42,778 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 14,117 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 42,778 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 14,117 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 42,778 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 14,117 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000035 · wk-form4_1746055706.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: 128,618

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 7,169 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000035 · wk-form4_1746055706.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: 135,787

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 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 42,778 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 14,117 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000034 · wk-form4_1746055637.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,620 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.

F3 · 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 1,620 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. The RSUs vest as to 100% of the Units granted on the second anniversary of the date of grant. On the 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, 100% of these RSUs vested, resulting in the issuance of 1,620 shares of Mattel, Inc. Common Stock.

F3 · 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 1,620 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. The RSUs vest as to 100% of the Units granted on the second anniversary of the date of grant. On the 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, 100% of these RSUs vested, resulting in the issuance of 1,620 shares of Mattel, Inc. Common Stock.

F3 · 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 1,620 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. The RSUs vest as to 100% of the Units granted on the second anniversary of the date of grant. On the 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, 100% of these RSUs vested, resulting in the issuance of 1,620 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000034 · wk-form4_1746055637.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,408

Underlying: Common Stock · 4,278 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 12,963 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 4,278 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 12,963 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 4,278 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 12,963 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 4,278 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000034 · wk-form4_1746055637.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,643

F4 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 580 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000034 · wk-form4_1746055637.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,223

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.

F3 · price: As reported on a Form 4 dated April 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 1,620 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. The RSUs vest as to 100% of the Units granted on the second anniversary of the date of grant. On the 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, 100% of these RSUs vested, resulting in the issuance of 1,620 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000034 · wk-form4_1746055637.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,603

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 1,531 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000034 · wk-form4_1746055637.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,134

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 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 12,963 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 4,278 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000033 · wk-form4_1746055588.xml · derivative · entry 3

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,480

Underlying: Common Stock · 18,906 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 57,292 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 18,906 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 57,292 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 18,906 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 57,292 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 18,906 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000033 · wk-form4_1746055588.xml · nonDerivative · entry 2

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 222,260

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 8,559 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000033 · wk-form4_1746055588.xml · nonDerivative · entry 1

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 230,819

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 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 57,292 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 18,906 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000032 · wk-form4_1746055520.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,506

Underlying: Common Stock · 13,108 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 39,722 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 13,108 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 39,722 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 13,108 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 39,722 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 13,108 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000032 · wk-form4_1746055520.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,077

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 6,657 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000032 · wk-form4_1746055520.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,734

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 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 39,722 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 13,108 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000026 · wk-form4_1745963799.xml · derivative · entry 4

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,810

Underlying: Common Stock · 20,100 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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 60,910 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 20,100 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 60,910 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 20,100 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 60,910 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 20,100 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000026 · wk-form4_1745963799.xml · nonDerivative · entry 2

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,796

F2 · shares: Pursuant to the terms of the April 25, 2024 RSU grant, 10,207 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000026 · wk-form4_1745963799.xml · nonDerivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 136,003

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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 60,910 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 20,100 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000025 · wk-form4_1745963705.xml · derivative · entry 3

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,129

Underlying: Common Stock · 47,347 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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 143,476 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 47,347 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 143,476 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 47,347 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 143,476 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 47,347 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000025 · wk-form4_1745963705.xml · nonDerivative · entry 2

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,470,890

F2 · shares: Pursuant to the terms of the April 25, 2024 RSU grant, 24,043 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000025 · wk-form4_1745963705.xml · nonDerivative · entry 1

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,494,933

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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 143,476 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 47,347 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000024 · wk-form4_1745963605.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: 27,207

Underlying: Common Stock · 13,399 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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 40,606 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 13,399 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 40,606 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 13,399 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 40,606 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 13,399 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000024 · wk-form4_1745963605.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: 121,670

F2 · shares: Pursuant to the terms of the April 25, 2024 RSU grant, 6,805 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000024 · wk-form4_1745963605.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: 128,475

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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 40,606 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 13,399 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000023 · wk-form4_1745963531.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,465

Underlying: Common Stock · 4,168 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 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 4,168 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 4,168 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 4,168 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000023 · wk-form4_1745963531.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,856

F2 · shares: Pursuant to the terms of the April 25, 2024 RSU grant, 1,492 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000023 · wk-form4_1745963531.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,348

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 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 4,168 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000022 · wk-form4_1745963442.xml · derivative · entry 3

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,344

Underlying: Common Stock · 22,333 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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 67,677 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 22,333 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 67,677 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 22,333 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 67,677 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 22,333 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000022 · wk-form4_1745963442.xml · nonDerivative · entry 2

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 211,913

F2 · shares: Pursuant to the terms of the April 25, 2024 RSU grant, 10,094 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000022 · wk-form4_1745963442.xml · nonDerivative · entry 1

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 222,007

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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 67,677 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 22,333 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000021 · wk-form4_1745963249.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,393

Underlying: Common Stock · 12,506 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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 37,899 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 12,506 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 37,899 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 12,506 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 37,899 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 12,506 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000021 · wk-form4_1745963249.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,626

F2 · shares: Pursuant to the terms of the April 25, 2024 RSU grant, 6,351 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-25-000021 · wk-form4_1745963249.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,977

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 25, 2024 and filed on April 29, 2024, the Reporting Person received a grant of 37,899 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 25, 2025, the first 33% of these RSUs vested, resulting in the issuance of 12,506 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-25-000014 · wk-form4_1738794991.xml · nonDerivative · entry 2

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 115,903

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

SEC source: 0001523711-25-000014 · wk-form4_1738794991.xml · nonDerivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 121,932

SEC source: 0001523711-25-000012 · wk-form4_1738794855.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: 115,076

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

SEC source: 0001523711-25-000012 · wk-form4_1738794855.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: 118,821

SEC source: 0001523711-25-000013 · wk-form4_1738794904.xml · nonDerivative · entry 2

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,447,586

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

SEC source: 0001523711-25-000013 · wk-form4_1738794904.xml · nonDerivative · entry 1

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,502,422

SEC source: 0001523711-25-000011 · wk-form4_1738794807.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,180

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

SEC source: 0001523711-25-000011 · wk-form4_1738794807.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,957

SEC source: 0001523711-25-000010 · wk-form4_1738794752.xml · nonDerivative · entry 2

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 199,674

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

SEC source: 0001523711-25-000010 · wk-form4_1738794752.xml · nonDerivative · entry 1

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 205,963

SEC source: 0001523711-25-000009 · wk-form4_1738794606.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,471

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

SEC source: 0001523711-25-000009 · wk-form4_1738794606.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,485

SEC source: 0001523711-24-000112 · wk-form4_1727903332.xml · derivative · entry 1

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 787,402

Underlying: Common Stock · 787,402 shares

Expires not disclosed

F1 · derivative.exercise_price: As disclosed on a Form 8-K filed on September 13, 2024 ("Form 8-K"), Performance-Based Restricted Stock Units were granted to the Reporting Person on September 30, 2024, pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"), including Performance-Based Restricted Units with vesting tied to stock price performance hurdles ("Performance Units"). Each Performance 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 Performance Units are subject to performance-based vesting requirements tied to stock price performance hurdles. The Performance Units set forth in the table above will become eligible to vest upon achievement of the following stock price hurdles at any time during the period beginning on September 30, 2026 and ending on September 30, 2029 (the "Performance Measurement Period"): (i) 0% of the Performance Units for a stock price hurdle of $27.00, (ii) 50% of the Performance Units for a stock price hurdle of $33.50, and (iii) 100% of the Performance Units for a stock price hurdle of $40.00. A stock price hurdle will be achieved only if the average closing price of the Issuer's common stock is equal to or greater than the hurdle for 30 consecutive trading days during the Performance Measurement Period. Linear interpolation will be used for achievement levels between the stock price hurdles.

F3 · derivative.exercise_date: If Performance Units become eligible to vest, the eligible Performance Units will vest and settle within fifteen (15) business days following September 30, 2029 and approval by the Compensation Committee of the Board of Directors of Mattel, Inc. of the achievement of the stock price hurdles, but in no event later than March 15, 2030, subject to the Reporting Person's continued employment with the Issuer through the settlement date. In addition to the Performance Units described above, separate Performance-Based Restricted Units will become eligible to vest based on the Issuer's relative total stockholder return over a period beginning on September 30, 2024, and ending on September 30, 2029 (as more fully described in the Form 8-K).

F2 · derivative.expiration_date: The Performance Units are subject to performance-based vesting requirements tied to stock price performance hurdles. The Performance Units set forth in the table above will become eligible to vest upon achievement of the following stock price hurdles at any time during the period beginning on September 30, 2026 and ending on September 30, 2029 (the "Performance Measurement Period"): (i) 0% of the Performance Units for a stock price hurdle of $27.00, (ii) 50% of the Performance Units for a stock price hurdle of $33.50, and (iii) 100% of the Performance Units for a stock price hurdle of $40.00. A stock price hurdle will be achieved only if the average closing price of the Issuer's common stock is equal to or greater than the hurdle for 30 consecutive trading days during the Performance Measurement Period. Linear interpolation will be used for achievement levels between the stock price hurdles.

F3 · derivative.expiration_date: If Performance Units become eligible to vest, the eligible Performance Units will vest and settle within fifteen (15) business days following September 30, 2029 and approval by the Compensation Committee of the Board of Directors of Mattel, Inc. of the achievement of the stock price hurdles, but in no event later than March 15, 2030, subject to the Reporting Person's continued employment with the Issuer through the settlement date. In addition to the Performance Units described above, separate Performance-Based Restricted Units will become eligible to vest based on the Issuer's relative total stockholder return over a period beginning on September 30, 2024, and ending on September 30, 2029 (as more fully described in the Form 8-K).

SEC source: 0001523711-24-000108 · wk-form4_1722977519.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 · 8,148 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 August 2, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 23,962 Restricted Stock Units ("RSUs" or "Units") on August 2, 2021. 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 August 2, 2024, the final 34% of these RSUs vested, resulting in the issuance of 8,148 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated August 2, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 23,962 Restricted Stock Units ("RSUs" or "Units") on August 2, 2021. 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 August 2, 2024, the final 34% of these RSUs vested, resulting in the issuance of 8,148 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated August 2, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 23,962 Restricted Stock Units ("RSUs" or "Units") on August 2, 2021. 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 August 2, 2024, the final 34% of these RSUs vested, resulting in the issuance of 8,148 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000108 · wk-form4_1722977519.xml · nonDerivative · entry 2

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 185,709

F2 · shares: Pursuant to the terms of the August 2, 2021 RSU grant, 3,675 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-24-000108 · wk-form4_1722977519.xml · nonDerivative · entry 1

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 189,384

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 August 2, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 23,962 Restricted Stock Units ("RSUs" or "Units") on August 2, 2021. 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 August 2, 2024, the final 34% of these RSUs vested, resulting in the issuance of 8,148 shares of Mattel, Inc. Common Stock.