MAT

SEC source: 0001476295-26-000006 · wk-form4_1792011652.xml · derivative · entry 3

Lynch Roger · CIK 0001476295 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 307,692

Underlying: Common Stock · 307,692 shares

Expires not disclosed

F3 · derivative.exercise_price: On October 12, 2026, the Reporting Person was granted 307,692 Annual RSUs pursuant to 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).

F4 · derivative.exercise_date: The Annual RSUs vest as to (a) 33% of the Units on May 1, 2027, (b) an additional 33% of the Units on May 1, 2028, and (c) the remaining 34% of the Units on May 1, 2029. 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.

F4 · derivative.expiration_date: The Annual RSUs vest as to (a) 33% of the Units on May 1, 2027, (b) an additional 33% of the Units on May 1, 2028, and (c) the remaining 34% of the Units on May 1, 2029. 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: 0001476295-26-000006 · wk-form4_1792011652.xml · nonDerivative · entry 2

Lynch Roger · CIK 0001476295 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 257,491

F2 · shares: Pursuant to the terms of the October 12, 2026 Make-Whole Award, 234,831 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001476295-26-000006 · wk-form4_1792011652.xml · nonDerivative · entry 1

Lynch Roger · CIK 0001476295 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 492,322

F1 · price: On October 12, 2026, the Reporting Person was granted a Make-Whole Award of 461,538 Restricted Stock Units ("RSUs" or "Units") pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). The RSUs vested immediately upon grant, and each Unit was settled for one share of Mattel, Inc. Common Stock on the grant date.

SEC source: 0002148131-26-000006 · wk-form4_1790972523.xml · derivative · entry 3

Stanichi Roberto Seixas · CIK 0002148131 · Pres., Chief Mktg & Brand Ofc

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,484

Underlying: Common Stock · 1,715 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 3 dated July 29, 2026 and filed on August 4, 2026, the Reporting Person received a grant of 5,199 Restricted Stock Units ("RSUs" or "Units") on September 30, 2025. 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 September 30, 2026, the first 33% of these RSUs vested, resulting in the issuance of 1,715 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 3 dated July 29, 2026 and filed on August 4, 2026, the Reporting Person received a grant of 5,199 Restricted Stock Units ("RSUs" or "Units") on September 30, 2025. 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 September 30, 2026, the first 33% of these RSUs vested, resulting in the issuance of 1,715 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 3 dated July 29, 2026 and filed on August 4, 2026, the Reporting Person received a grant of 5,199 Restricted Stock Units ("RSUs" or "Units") on September 30, 2025. 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 September 30, 2026, the first 33% of these RSUs vested, resulting in the issuance of 1,715 shares of Mattel, Inc. Common Stock.

SEC source: 0002148131-26-000006 · wk-form4_1790972523.xml · nonDerivative · entry 2

Stanichi Roberto Seixas · CIK 0002148131 · Pres., Chief Mktg & Brand Ofc

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,771

F2 · shares: Pursuant to the terms of the September 30, 2025 RSU grant, 873 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0002148131-26-000006 · wk-form4_1790972523.xml · nonDerivative · entry 1

Stanichi Roberto Seixas · CIK 0002148131 · Pres., Chief Mktg & Brand Ofc

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,644

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 3 dated July 29, 2026 and filed on August 4, 2026, the Reporting Person received a grant of 5,199 Restricted Stock Units ("RSUs" or "Units") on September 30, 2025. 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 September 30, 2026, the first 33% of these RSUs vested, resulting in the issuance of 1,715 shares of Mattel, Inc. Common Stock.

SEC source: 0001767603-26-000012 · wk-form4_1788387672.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: 144,390

F1 · price: This transaction was executed in multiple trades at prices ranging from $15.000 to $15.045. The price reported reflects the weighted average sale price, rounded to the nearest tenth of a cent. The Reporting Person hereby undertakes to provide to the SEC staff, the issuer or a security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transactions were effected.

SEC source: 0002148131-26-000004 · wk-form4_1785880416.xml · derivative · entry 2

Stanichi Roberto Seixas · CIK 0002148131 · Pres., Chief Mktg & Brand Ofc

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 132,538

Underlying: Common Stock · 132,538 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on July 31, 2026 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).

F3 · derivative.exercise_date: The RSUs vest as to 50% of the Units granted on the first anniversary of the date of grant and as to the remaining 50% of the Units granted on the second 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.

F3 · derivative.expiration_date: The RSUs vest as to 50% of the Units granted on the first anniversary of the date of grant and as to the remaining 50% of the Units granted on the second 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: 0002148131-26-000004 · wk-form4_1785880416.xml · derivative · entry 1

Stanichi Roberto Seixas · CIK 0002148131 · Pres., Chief Mktg & Brand Ofc

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,956

Underlying: Common Stock · 62,956 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on July 31, 2026 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: 0001967445-26-000004 · wk-form4_1780435842.xml · derivative · entry 6

Ruh Paul · CIK 0001967445 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,425

Underlying: Common Stock · 66,209 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 May 30, 2025 and filed on June 3, 2025, the Reporting Person received a grant of 200,634 RSUs on May 30, 2025. 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 29, 2026, the first 33% of these RSUs vested, resulting in the issuance of 66,209 shares of Mattel, Inc. Common Stock.

F3 · derivative.exercise_date: As reported on a Form 4 dated May 30, 2025 and filed on June 3, 2025, the Reporting Person received a grant of 200,634 RSUs on May 30, 2025. 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 29, 2026, the first 33% of these RSUs vested, resulting in the issuance of 66,209 shares of Mattel, Inc. Common Stock.

F3 · derivative.expiration_date: As reported on a Form 4 dated May 30, 2025 and filed on June 3, 2025, the Reporting Person received a grant of 200,634 RSUs on May 30, 2025. 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 29, 2026, the first 33% of these RSUs vested, resulting in the issuance of 66,209 shares of Mattel, Inc. Common Stock.

SEC source: 0001967445-26-000004 · wk-form4_1780435842.xml · derivative · entry 5

Ruh Paul · CIK 0001967445 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,968

Underlying: Common Stock · 24,610 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 30, 2025 and filed on June 3, 2025, the Reporting Person received a grant of 74,578 Restricted Stock Units ("RSUs" or "Units") on May 30, 2025. 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 29, 2026, the first 33% of these RSUs vested, resulting in the issuance of 24,610 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 30, 2025 and filed on June 3, 2025, the Reporting Person received a grant of 74,578 Restricted Stock Units ("RSUs" or "Units") on May 30, 2025. 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 29, 2026, the first 33% of these RSUs vested, resulting in the issuance of 24,610 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 30, 2025 and filed on June 3, 2025, the Reporting Person received a grant of 74,578 Restricted Stock Units ("RSUs" or "Units") on May 30, 2025. 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 29, 2026, the first 33% of these RSUs vested, resulting in the issuance of 24,610 shares of Mattel, Inc. Common Stock.

SEC source: 0001967445-26-000004 · wk-form4_1780435842.xml · nonDerivative · entry 4

Ruh Paul · CIK 0001967445 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,788

F4 · shares: Pursuant to the terms of the May 30, 2025 RSU grant, 31,360 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001967445-26-000004 · wk-form4_1780435842.xml · nonDerivative · entry 3

Ruh Paul · CIK 0001967445 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,148

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 May 30, 2025 and filed on June 3, 2025, the Reporting Person received a grant of 200,634 RSUs on May 30, 2025. 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 29, 2026, the first 33% of these RSUs vested, resulting in the issuance of 66,209 shares of Mattel, Inc. Common Stock.

SEC source: 0001967445-26-000004 · wk-form4_1780435842.xml · nonDerivative · entry 2

Ruh Paul · CIK 0001967445 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,939

F2 · shares: Pursuant to the terms of the May 30, 2025 RSU grant, 8,671 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001967445-26-000004 · wk-form4_1780435842.xml · nonDerivative · entry 1

Ruh Paul · CIK 0001967445 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,610

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 30, 2025 and filed on June 3, 2025, the Reporting Person received a grant of 74,578 Restricted Stock Units ("RSUs" or "Units") on May 30, 2025. 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 29, 2026, the first 33% of these RSUs vested, resulting in the issuance of 24,610 shares of Mattel, Inc. Common Stock.

SEC source: 0002024410-26-000006 · wk-form4_1780435811.xml · derivative · entry 3

Ancira Karen · CIK 0002024410 · EVP, Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,201

Underlying: Common Stock · 16,695 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 29, 2026, the second 33% of these RSUs vested, resulting in the issuance of 16,695 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 29, 2026, the second 33% of these RSUs vested, resulting in the issuance of 16,695 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 29, 2026, the second 33% of these RSUs vested, resulting in the issuance of 16,695 shares of Mattel, Inc. Common Stock.

SEC source: 0002024410-26-000006 · wk-form4_1780435811.xml · nonDerivative · entry 2

Ancira Karen · CIK 0002024410 · EVP, Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,279

F2 · shares: Pursuant to the terms of the May 31, 2024 RSU grant, 5,991 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0002024410-26-000006 · wk-form4_1780435811.xml · nonDerivative · entry 1

Ancira Karen · CIK 0002024410 · EVP, Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,270

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 29, 2026, the second 33% of these RSUs vested, resulting in the issuance of 16,695 shares of Mattel, Inc. Common Stock.

SEC source: 0001815563-26-000002 · wk-form4_1780351026.xml · derivative · entry 1

OSTROFF DAWN · CIK 0001815563 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001605729-26-000011 · wk-form4_1780350978.xml · derivative · entry 1

Olian Judy D. · CIK 0001605729 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001201236-26-000014 · wk-form4_1780350941.xml · derivative · entry 1

NG DOMINIC · CIK 0001201236 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001476295-26-000004 · wk-form4_1780350913.xml · derivative · entry 2

Lynch Roger · CIK 0001476295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,746

Underlying: Common Stock · 11,753 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: 0001476295-26-000004 · wk-form4_1780350913.xml · derivative · entry 1

Lynch Roger · CIK 0001476295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001740353-26-000004 · wk-form4_1780350780.xml · derivative · entry 1

Laursen Soren T · CIK 0001740353 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001807354-26-000007 · wk-form4_1780350750.xml · derivative · entry 1

Hertz Noreena · CIK 0001807354 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001275975-26-000006 · wk-form4_1780350666.xml · derivative · entry 1

FERGUSON DIANA SUE · CIK 0001275975 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001184231-26-000002 · wk-form4_1780350707.xml · derivative · entry 1

GENACHOWSKI JULIUS · CIK 0001184231 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001749229-26-000004 · wk-form4_1780350640.xml · derivative · entry 1

Cisneros Adriana · CIK 0001749229 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,753

Underlying: Common Stock · 11,753 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on May 28, 2026 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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: 0001476295-26-000002 · wk-form4_1779226123.xml · derivative · entry 2

Lynch Roger · CIK 0001476295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,594 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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001476295-26-000002 · wk-form4_1779226123.xml · nonDerivative · entry 1

Lynch Roger · CIK 0001476295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,784

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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001605729-26-000008 · wk-form4_1779226143.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 · 8,594 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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001605729-26-000008 · wk-form4_1779226143.xml · nonDerivative · entry 1

Olian Judy D. · CIK 0001605729 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,298

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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001740353-26-000002 · wk-form4_1779226091.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 · 8,594 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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001740353-26-000002 · wk-form4_1779226091.xml · nonDerivative · entry 1

Laursen Soren T · CIK 0001740353 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,224

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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001807354-26-000005 · wk-form4_1779226061.xml · derivative · entry 3

Hertz Noreena · CIK 0001807354 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,594 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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001807354-26-000005 · wk-form4_1779226061.xml · nonDerivative · entry 2

Hertz Noreena · CIK 0001807354 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,641

F2 · shares: Pursuant to the terms of the May 15, 2023 RSU grant, 1,719 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001807354-26-000005 · wk-form4_1779226061.xml · nonDerivative · entry 1

Hertz Noreena · CIK 0001807354 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,360

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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001275975-26-000004 · wk-form4_1779226038.xml · derivative · entry 2

FERGUSON DIANA SUE · CIK 0001275975 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,594 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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001275975-26-000004 · wk-form4_1779226038.xml · nonDerivative · entry 1

FERGUSON DIANA SUE · CIK 0001275975 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,551

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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001749229-26-000002 · wk-form4_1779226004.xml · derivative · entry 2

Cisneros Adriana · CIK 0001749229 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,594 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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001749229-26-000002 · wk-form4_1779226004.xml · nonDerivative · entry 1

Cisneros Adriana · CIK 0001749229 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,669

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 15, 2023 and filed on May 17, 2023, the Reporting Person received a grant of 8,594 Restricted Stock Units ("RSUs") on May 15, 2023. The RSUs were fully vested on the grant date and are settled on the third anniversary of the grant date. On May 15, 2026, 100% of these RSUs were settled, resulting in the issuance of 8,594 shares of Mattel Common Stock.

SEC source: 0001708842-26-000011 · wk-form4_1778532839.xml · derivative · entry 3

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 103,999

Underlying: Common Stock · 51,222 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 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 155,221 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 51,222 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 155,221 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 51,222 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 155,221 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 51,222 shares of Mattel, Inc. Common Stock.

SEC source: 0001708842-26-000011 · wk-form4_1778532839.xml · nonDerivative · entry 2

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,842,633

F2 · shares: Pursuant to the terms of the May 7, 2025 RSU grant, 26,062 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001708842-26-000011 · wk-form4_1778532839.xml · nonDerivative · entry 1

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,868,695

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 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 155,221 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 51,222 shares of Mattel, Inc. Common Stock.

SEC source: 0001767603-26-000010 · wk-form4_1778532815.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: 36,038

Underlying: Common Stock · 17,749 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 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 53,787 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 17,749 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 53,787 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 17,749 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 53,787 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 17,749 shares of Mattel, Inc. Common Stock.

SEC source: 0001767603-26-000010 · wk-form4_1778532815.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: 183,473

F2 · shares: Pursuant to the terms of the May 7, 2025 RSU grant, 9,031 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001767603-26-000010 · wk-form4_1778532815.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: 192,504

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 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 53,787 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 17,749 shares of Mattel, Inc. Common Stock.

SEC source: 0001474865-26-000011 · wk-form4_1778532788.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,970

Underlying: Common Stock · 4,417 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 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 13,387 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 4,417 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated May 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 13,387 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 4,417 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated May 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 13,387 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 4,417 shares of Mattel, Inc. Common Stock.

SEC source: 0001474865-26-000011 · wk-form4_1778532788.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,697

F2 · shares: Pursuant to the terms of the May 7, 2025 RSU grant, 1,585 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001474865-26-000011 · wk-form4_1778532788.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,282

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 7, 2025 and filed on May 9, 2025, the Reporting Person received a grant of 13,387 Restricted Stock Units ("RSUs" or "Units") on May 7, 2025. 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 7, 2026, the first 33% of these RSUs vested, resulting in the issuance of 4,417 shares of Mattel, Inc. Common Stock.