Roberto Seixas Stanichi - 29 Jul 2026 Form 3 Insider Report for MATTEL INC /DE/ (MAT)

Reporting relationship
Pres., Chief Mktg & Brand Ofc
Issuer ticker
MAT
Reported as of
29 Jul 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
3
Accepted by SEC
04 Aug 2026, 17:52:46 UTC
Next SEC filing
04 Aug 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Tiffani Magri, Attorney-in-Fact for Roberto Seixas Stanichi

Key filing fact

Roberto Seixas Stanichi filed Form 3 for MATTEL INC /DE/ (MAT) on 04 Aug 2026.

Key facts

  • This page summarizes Roberto Seixas Stanichi's Form 3 filing for MATTEL INC /DE/ (MAT).
  • 0 reported transactions and 6 derivative rows are listed below.
  • Accepted by SEC: 04 Aug 2026, 17:52.

Change

  • No earlier filing in this sequence is available for direct comparison.
  • Current net transaction value: $0.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0002148131 Primary reporting owner

Stanichi Roberto Seixas

Relationship
Pres., Chief Mktg & Brand Ofc
Address
333 CONTINENTAL BOULEVARD, EL SEGUNDO
Signature
/s/ Tiffani Magri, Attorney-in-Fact for Roberto Seixas Stanichi
Signature date
04 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MAT holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
45,929
Date
29 Jul 2026
Ownership
Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MAT holding Derivative

Restricted Stock Units - Granted 04/25/2024

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
29 Jul 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
8,345
Exercise price
Footnotes
F1, F2
MAT holding Derivative

Restricted Stock Units - Granted 04/30/2024

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
29 Jul 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
5,568
Exercise price
Footnotes
F1, F2
MAT holding Derivative

Restricted Stock Units - Granted 04/30/2025

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
29 Jul 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
10,542
Exercise price
Footnotes
F1, F2
MAT holding Derivative

Restricted Stock Units - Granted 05/07/2025

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
29 Jul 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
15,376
Exercise price
Footnotes
F1, F2
MAT holding Derivative

Restricted Stock Units - Granted 09/30/2025

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
29 Jul 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
5,199
Exercise price
Footnotes
F1, F2
MAT holding Derivative

Restricted Stock Units - Granted 05/01/2026

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
29 Jul 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
36,839
Exercise price
Footnotes
F1, F2
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The Restricted Stock Units (the "RSUs" or "Units") 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.

Footnote F2

The RSUs were granted pursuant to the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, as amended. 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).

SEC remarks

Exhibit 24 - Power of Attorney

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