MAT

SEC source: 0001523711-24-000047 · wk-form4_1714514008.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,959

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 6,644 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-24-000047 · wk-form4_1714514008.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,603

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, 2024, the first 33% of these RSUs vested, resulting in the issuance of 13,108 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000048 · wk-form4_1714514095.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,662

Underlying: Common Stock · 14,116 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, 2024, the first 33% of these RSUs vested, resulting in the issuance of 14,116 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, 2024, the first 33% of these RSUs vested, resulting in the issuance of 14,116 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, 2024, the first 33% of these RSUs vested, resulting in the issuance of 14,116 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000048 · wk-form4_1714514095.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: 124,729

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 7,154 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-24-000048 · wk-form4_1714514095.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: 131,883

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, 2024, the first 33% of these RSUs vested, resulting in the issuance of 14,116 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000046 · wk-form4_1714513922.xml · derivative · entry 6

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,709

Underlying: Common Stock · 15,124 shares

Expires not disclosed

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

F1 · derivative.exercise_price: As reported on a Form 4 dated April 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 45,833 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock, subject to tax withholding. On April 28, 2024, the first 33% of these RSUs vested, resulting in the issuance of 15,124 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated April 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 45,833 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock, subject to tax withholding. On April 28, 2024, the first 33% of these RSUs vested, resulting in the issuance of 15,124 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated April 28, 2023 and filed on May 2, 2023, the Reporting Person received a grant of 45,833 Restricted Stock Units ("RSUs" or "Units") on April 28, 2023. The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock, subject to tax withholding. On April 28, 2024, the first 33% of these RSUs vested, resulting in the issuance of 15,124 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000046 · wk-form4_1714513922.xml · nonDerivative · entry 2

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,659

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 7,665 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-24-000046 · wk-form4_1714513922.xml · nonDerivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 178,324

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, 2024, the first 33% of these RSUs vested, resulting in the issuance of 15,124 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000045 · wk-form4_1714513805.xml · derivative · entry 5

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,386

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, 2024, the first 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, 2024, the first 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, 2024, the first 33% of these RSUs vested, resulting in the issuance of 18,906 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000045 · wk-form4_1714513805.xml · nonDerivative · entry 2

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 174,122

F2 · shares: Pursuant to the terms of the April 28, 2023 RSU grant, 8,431 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-24-000045 · wk-form4_1714513805.xml · nonDerivative · entry 1

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 182,553

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, 2024, the first 33% of these RSUs vested, resulting in the issuance of 18,906 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000039 · wk-form4_1714428963.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,633

Underlying: Common Stock · 12,633 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on April 25, 2024 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-24-000038 · wk-form4_1714428894.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,606

Underlying: Common Stock · 40,606 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on April 25, 2024 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-24-000037 · wk-form4_1714428761.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,899

Underlying: Common Stock · 37,899 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on April 25, 2024 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-24-000036 · wk-form4_1714428669.xml · derivative · entry 3

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,910

Underlying: Common Stock · 60,910 shares

Expires not disclosed

F2 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on April 25, 2024 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 (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.

F3 · derivative.expiration_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-24-000036 · wk-form4_1714428669.xml · nonDerivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k) Plan

Disclosed balance after: 19,100

F1 · balance_after: As of April 25, 2024, the Reporting Person had a balance of $351,312.61 in the Mattel Stock Fund of Mattel, Inc.'s 401(k) plan, the Personal Investment Plan ("PIP"). The number of shares has been calculated by the third-party administrator for the PIP.

SEC source: 0001523711-24-000035 · wk-form4_1714428589.xml · derivative · entry 1

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,677

Underlying: Common Stock · 67,677 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on April 25, 2024 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-24-000034 · wk-form4_1714428499.xml · derivative · entry 1

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,476

Underlying: Common Stock · 143,476 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on April 25, 2024 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each Unit represents a contingent right to receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of such share).

F2 · derivative.exercise_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

F2 · derivative.expiration_date: The RSUs vest as to (a) 33% of the Units granted on the first anniversary of the date of grant, (b) an additional 33% of the Units granted on the second anniversary of the date of grant, and (c) the remaining 34% of the Units granted on the third anniversary of the date of grant. On each vesting date, for each Unit vesting on such date, the Reporting Person will receive one share of Mattel, Inc. Common Stock (or, at the election of Mattel, Inc., a cash amount equal to the fair market value of one share of Common Stock on the date of vesting), subject to tax withholding.

SEC source: 0001523711-24-000027 · wk-form4_1707348519.xml · nonDerivative · entry 2

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 163,200

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

SEC source: 0001523711-24-000027 · wk-form4_1707348519.xml · nonDerivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 179,124

SEC source: 0001523711-24-000026 · wk-form4_1707348442.xml · nonDerivative · entry 2

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,377,862

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

SEC source: 0001523711-24-000026 · wk-form4_1707348442.xml · nonDerivative · entry 1

Kreiz Ynon · CIK 0001708842 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,537,308

SEC source: 0001523711-24-000025 · wk-form4_1707348356.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: 117,767

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

SEC source: 0001523711-24-000025 · wk-form4_1707348356.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: 126,257

SEC source: 0001523711-24-000024 · wk-form4_1707348291.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,918

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

SEC source: 0001523711-24-000024 · wk-form4_1707348291.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,725

SEC source: 0001523711-24-000023 · wk-form4_1707348204.xml · nonDerivative · entry 2

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 163,647

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

SEC source: 0001523711-24-000023 · wk-form4_1707348204.xml · nonDerivative · entry 1

DISILVESTRO ANTHONY · CIK 0001285140 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 177,513

SEC source: 0001523711-24-000022 · wk-form4_1707348102.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,495

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

SEC source: 0001523711-24-000022 · wk-form4_1707348102.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,720

SEC source: 0001523711-24-000021 · wk-form4_1707348014.xml · derivative · entry 1

OSTROFF DAWN · CIK 0001815563 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,978

Underlying: Common Stock · 2,978 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on February 5, 2024 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). 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. On the settlement date, for each vested RSU, the Reporting Person will receive one share of 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 settlement date).

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. On the settlement date, for each vested RSU, the Reporting Person will receive one share of 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 settlement date).

SEC source: 0001523711-24-000020 · wk-form4_1707347955.xml · derivative · entry 1

GENACHOWSKI JULIUS · CIK 0001184231 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,978

Underlying: Common Stock · 2,978 shares

Expires not disclosed

F1 · derivative.exercise_price: The Restricted Stock Units ("RSUs" or "Units") were granted on February 5, 2024 pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended (the "Plan"). Each RSU 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). 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. On the settlement date, for each vested RSU, the Reporting Person will receive one share of 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 settlement date).

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. On the settlement date, for each vested RSU, the Reporting Person will receive one share of 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 settlement date).

SEC source: 0001523711-24-000002 · wk-form4_1706740773.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,333 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 January 29, 2021 and filed on February 2, 2021, the Reporting Person received a grant of 18,626 Restricted Stock Units ("RSUs" or "Units") on January 29, 2021. 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 January 29, 2024, the remaining 34% of these RSUs vested, resulting in the issuance of 6,333 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated January 29, 2021 and filed on February 2, 2021, the Reporting Person received a grant of 18,626 Restricted Stock Units ("RSUs" or "Units") on January 29, 2021. 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 January 29, 2024, the remaining 34% of these RSUs vested, resulting in the issuance of 6,333 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated January 29, 2021 and filed on February 2, 2021, the Reporting Person received a grant of 18,626 Restricted Stock Units ("RSUs" or "Units") on January 29, 2021. 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 January 29, 2024, the remaining 34% of these RSUs vested, resulting in the issuance of 6,333 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-24-000002 · wk-form4_1706740773.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,064

F2 · shares: Pursuant to the terms of the January 29, 2021 RSU grant, 2,571 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-24-000002 · wk-form4_1706740773.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,635

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 January 29, 2021 and filed on February 2, 2021, the Reporting Person received a grant of 18,626 Restricted Stock Units ("RSUs" or "Units") on January 29, 2021. 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 January 29, 2024, the remaining 34% of these RSUs vested, resulting in the issuance of 6,333 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-23-000106 · wf-form4_169170533274894.xml · nonDerivative · entry 1

BRADLEY RICHARD TODD · CIK 0001203500 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,729

SEC source: 0001523711-23-000104 · wf-form4_169152704699412.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,316

SEC source: 0001523711-23-000100 · wf-form4_169119031911539.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 103,112

F3 · price: This transaction was executed in multiple trades at prices ranging from $20.36 to $20.38. The price reported reflects the weighted average purchase 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: 0001523711-23-000099 · wf-form4_169119026784213.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,924

SEC source: 0001523711-23-000102 · wf-form4_169119042630247.xml · derivative · entry 3

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,760

Underlying: Common Stock · 7,531 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 July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 22,821 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 7,531 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 22,821 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 7,531 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 22,821 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 7,531 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-23-000102 · wf-form4_169119042630247.xml · nonDerivative · entry 2

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 135,039

F2 · shares: Pursuant to the terms of the August 2, 2021 RSU grant, 3,734 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-23-000102 · wf-form4_169119042630247.xml · nonDerivative · entry 1

TOTZKE STEVE · CIK 0001666142 · President, Chief Comm Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,773

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 July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 22,821 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 7,531 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-23-000101 · wf-form4_169119037407924.xml · derivative · entry 3

Thompson Amanda J · CIK 0001718049 · EVP & Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,074

Underlying: Common Stock · 3,954 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 July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 11,981 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 3,954 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 11,981 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 3,954 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 11,981 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 3,954 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-23-000101 · wf-form4_169119037407924.xml · nonDerivative · entry 2

Thompson Amanda J · CIK 0001718049 · EVP & Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,000

F2 · shares: Pursuant to the terms of the August 2, 2021 RSU grant, 1,961 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-23-000101 · wf-form4_169119037407924.xml · nonDerivative · entry 1

Thompson Amanda J · CIK 0001718049 · EVP & Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 147,961

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 July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 11,981 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 3,954 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-23-000100 · wf-form4_169119031911539.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,111

Underlying: Common Stock · 5,930 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 July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 17,971 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 5,930 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 17,971 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 5,930 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 17,971 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 5,930 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-23-000100 · wf-form4_169119031911539.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: 128,112

F2 · shares: Pursuant to the terms of the August 2, 2021 RSU grant, 2,941 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.

SEC source: 0001523711-23-000100 · wf-form4_169119031911539.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: 131,053

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 July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 17,971 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 5,930 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-23-000099 · wf-form4_169119026784213.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,910

Underlying: Common Stock · 2,824 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 July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 8,558 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 2,824 shares of Mattel, Inc. Common Stock.

F1 · derivative.exercise_date: As reported on a Form 4 dated July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 8,558 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 2,824 shares of Mattel, Inc. Common Stock.

F1 · derivative.expiration_date: As reported on a Form 4 dated July 31, 2021 and filed on August 3, 2021, the Reporting Person received a grant of 8,558 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, 2023, the second 33% of these RSUs vested, resulting in the issuance of 2,824 shares of Mattel, Inc. Common Stock.

SEC source: 0001523711-23-000099 · wf-form4_169119026784213.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,715

F2 · shares: Pursuant to the terms of the August 2, 2021 RSU grant, 977 shares of Mattel, Inc. Common Stock were automatically withheld at vesting to cover required tax withholding.