Mattel grants RSU awards to marketing chief

Stanichi Roberto Seixas reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Stanichi Roberto Seixas reported acquisition or exercise transactions in this Form 4 filing.

Mattel executive Roberto Seixas Stanichi, President and Chief Marketing & Brand Officer, received two restricted stock unit grants on July 31, 2026. One award covers 62,956 RSUs vesting 33%, 33%, and 34% on the first, second, and third anniversaries of grant; another covers 132,538 RSUs vesting 50% after one year and 50% after two years. Each unit represents a contingent right to receive one Mattel common share, or an equivalent cash amount at Mattel’s election, at vesting, subject to tax withholding.

Insider Trade Summary

Grant/Award: 195,494 shares

Grant/Award 2 txns

Insider Stanichi Roberto Seixas

Role Pres., Chief Mktg & Brand Ofc

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units F1, F2	62,956	$0.00	$0.00
Grant/Award	Restricted Stock Units F1, F3	132,538	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 195,494 contracts (Direct)

Footnotes (3)

1. F1. 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).
2. F2. 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.
3. F3. 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.

Key Figures

RSU grant 1 size: 62,956 units RSU grant 2 size: 132,538 units Grant date: July 31, 2026 +2 more

5 metrics

RSU grant 1 size 62,956 units Restricted Stock Units granted on July 31, 2026 with three-year 33%/33%/34% vesting

RSU grant 2 size 132,538 units Restricted Stock Units granted on July 31, 2026 with two-year 50%/50% vesting

Grant date July 31, 2026 Date both RSU awards were granted under Mattel’s Amended and Restated 2010 Equity and Long-Term Compensation Plan

Grant 1 vesting percentages 33%, 33%, 34% Vesting schedule of first RSU grant over three anniversaries of the grant date

Grant 2 vesting percentages 50%, 50% Vesting schedule of second RSU grant over first and second anniversaries of the grant date

Key Terms

Restricted Stock Units, vesting, tax withholding, Equity and Long-Term Compensation Plan

4 terms

Restricted Stock Units financial

"The Restricted Stock Units ("RSUs" or "Units") were granted on July 31, 2026"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vesting financial

"The RSUs vest as to (a) 33% of the Units granted on the first anniversary"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

tax withholding financial

"the Reporting Person will receive one share ... subject to tax withholding"

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

Equity and Long-Term Compensation Plan financial

"pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider activity did Mattel (MAT) report for Roberto Seixas Stanichi?

Roberto Seixas Stanichi received two grants of Restricted Stock Units on July 31, 2026. One grant is for 62,956 RSUs with three-year graded vesting and the other is for 132,538 RSUs with two-year vesting.

How many Restricted Stock Units were granted to the Mattel (MAT) marketing chief and how do they vest?

He received 62,956 RSUs vesting 33%, 33%, 34% over three years and 132,538 RSUs vesting 50% after one year and 50% after two years, all based on anniversaries of the July 31, 2026 grant date.

What does each Restricted Stock Unit represent for Mattel (MAT) in this Form 4?

Each RSU represents a contingent right to one share of Mattel common stock, or at Mattel’s election a cash amount equal to that share’s fair market value on the vesting date, subject to tax withholding.

Are the Mattel (MAT) RSU grants to Roberto Seixas Stanichi open-market purchases or sales?

No. The transactions are coded “A” for grant, award, or other acquisition of RSUs under Mattel’s equity and long-term compensation plan, not open-market stock purchases or sales.

Do the Mattel (MAT) RSU awards give cash or stock on vesting?

On each vesting date, each RSU delivers either one share of Mattel common stock or a cash amount equal to the share’s fair market value, at Mattel’s election, with amounts delivered subject to tax withholding.

Is Roberto Seixas Stanichi’s Mattel (MAT) RSU grant tied to a Rule 10b5-1 trading plan?

The document-level Rule 10b5-1 checkbox is not checked, and the footnotes describe routine RSU grants and vesting mechanics, not a pre-arranged Rule 10b5-1 trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/04/2026 - 05:54 PM Accepted by SEC EDGAR 08/04/2026 - 05:53 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Stanichi Roberto Seixas

(Last) (First) (Middle)

333 CONTINENTAL BOULEVARD

(Street)

EL SEGUNDO CALIFORNIA 90245

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MATTEL INC /DE/ [ MAT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Pres., Chief Mktg & Brand Ofc

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/31/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	07/31/2026		A		62,956		(2)	(2)	Common Stock	62,956	$0	62,956	D
Restricted Stock Units	(1)	07/31/2026		A		132,538		(3)	(3)	Common Stock	132,538	$0	132,538	D

Explanation of Responses:

1. 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).

2. 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.

3. 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.

Remarks:

	/s/ Tiffani Magri, Attorney-in-Fact for Roberto Seixas Stanichi	08/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)