Mattel officer receives 1,715 shares as grant vests

The 5,199-RSU award vests over three anniversaries, with 33% in the first tranche, another 33% in the second, and 34% in the third.

Rhea-AI Filing Summary

Mattel President, Chief Marketing & Brand Officer Roberto Seixas Stanichi had 1,715 Restricted Stock Units vest on September 30, 2026, resulting in the issuance of 1,715 common shares. At vesting, 873 shares were automatically withheld to cover required tax withholding, at a reported price of $12.66 per share. The reported RSU position after the transaction was 3,484 units.

Insider Trade Summary

1,715 shares exercised/converted

Exercise 3 txns

Insider Stanichi Roberto Seixas

Role Pres., Chief Mktg & Brand Ofc

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F1	1,715	$0.00	$0.00
Exercise	Common Stock F1	1,715	--	--
Tax Withholding	Common Stock F2	873	$12.66	$11K

Holdings After Transaction: Restricted Stock Units — 3,484 contracts (Direct); Common Stock — 46,771 shares (Direct)

Footnotes (2)

1. F1. 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.
2. F2. 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.

Key Figures

RSUs vested: 1,715 units Common shares issued: 1,715 shares Shares withheld for tax withholding: 873 shares +3 more

6 metrics

RSUs vested 1,715 units September 30, 2026

Common shares issued 1,715 shares On vesting of the RSUs on September 30, 2026

Shares withheld for tax withholding 873 shares Automatically withheld at vesting

Reported price per share $12.66 per share Code F share withholding transaction

RSU position following transaction 3,484 units Reported after the September 30, 2026 transaction

RSUs granted 5,199 units Grant dated September 30, 2025

Key Terms

Restricted Stock Units, vesting date, tax withholding

3 terms

Restricted Stock Units financial

"received a grant of 5,199 Restricted Stock Units"

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 date financial

"On each vesting date"

tax withholding financial

"to cover required 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.

FAQ

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

How many MAT RSUs vested, and how many shares were withheld for taxes?

On September 30, 2026, 1,715 RSUs vested, resulting in the issuance of 1,715 Mattel common shares; 873 shares were automatically withheld at vesting to cover required tax withholding.

What is the vesting schedule for Roberto Seixas Stanichi’s MAT RSUs?

The 5,199 RSUs granted on September 30, 2025 vest 33% on the first anniversary, another 33% on the second, and the remaining 34% on the third. Each vesting unit results in one Mattel common share, subject to tax withholding.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 10/02/2026 - 04:22 PM Accepted by SEC EDGAR 10/02/2026 - 04:22 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)
09/30/2026

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
Common Stock	09/30/2026		M		1,715	A	(1)	47,644	D
Common Stock	09/30/2026		F		873(2)	D	$12.66	46,771	D

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)	09/30/2026		M			1,715	(1)	(1)	Common Stock	1,715	$0	3,484	D

Explanation of Responses:

1. 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.

2. 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.

Remarks:

	/s/ Tiffani Magri, Attorney-in-Fact for Roberto Seixas Stanichi	10/02/2026
	** 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)