(MAT)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: MAT
Reported as of: 21 Oct 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 22 Oct 2026, 07:04:13 UTC
Source filing: View source filing
Reporting owner signature: /s/ Sayuri Childs, Chief Compliance Officer

Filing notes and source

Key filing fact

EdgePoint Investment Group Inc. filed Form 3 for MATTEL INC /DE/ (MAT) on 22 Oct 2026.

Key facts

This page summarizes EdgePoint Investment Group Inc.'s Form 3 filing for MATTEL INC /DE/ (MAT).
0 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 22 Oct 2026, 07:04.

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 0001481669 Primary reporting owner

EdgePoint Investment Group Inc.

Relationship: Director, 10%+ Owner
Address: 150 BLOOR STREET WEST, SUITE 700, TORONTO, ONTARIO, CANADA
Signature: /s/ Sayuri Childs, Chief Compliance Officer
Signature date: 22 Oct 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: 50,515,811
Date: 21 Oct 2026
Ownership: Through mutual fund trusts and separately managed accounts
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

EdgePoint Investment Group Inc. ("EdgePoint") acts as investment manager to, and exercises investment discretion with respect to, the Issuer's Common Stock directly owned by a number of mutual fund trusts and separately managed accounts (the "EdgePoint Funds").

Footnote F2

In accordance with Instruction 5(b)(iv) to Form 3, the entire amount of the Issuer's Common Stock held by the EdgePoint Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), EdgePoint disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be an admission that EdgePoint is the beneficial owner of any such securities for purposes of Section 16 or otherwise.

SEC remarks

Pursuant to the Cooperation Agreement, dated as of October 21, 2026, between EdgePoint and the Issuer, the Issuer has appointed Lee Matheson, a Partner at EdgePoint, to the Board of Directors of the Issuer. Accordingly, solely for purposes of Section 16, EdgePoint may be deemed a "director by deputization" of the Issuer; the filing of this Form 3 shall not be deemed an admission of such status for purposes of Section 16 or otherwise.