EdgePoint Investment Group (MAT) discloses 16.26% stake in Mattel

Rhea-AI Filing Summary

EdgePoint Investment Group Inc. reported beneficial ownership of 49,140,882 shares of Mattel, Inc. common stock, representing 16.26% of the class. The filing lists 34,783,416 shares as sole voting power and 14,357,466 shares as shared voting power. The amendment is signed by Sayuri Childs, Chief Compliance Officer, dated 05/15/2026.

Insights

Institutional Ownership Analyst

EdgePoint discloses a sizeable 16.26% stake in Mattel.

EdgePoint Investment Group reports beneficial ownership of 49,140,882 shares, with 34,783,416 shares held with sole voting power and 14,357,466 with shared voting power. The filing is an amendment to a Schedule 13G filing and is administrative disclosure of holdings.

The ownership size indicates a significant institutional position; any change in voting alignment or future Form 13D activity would materially change the picture. Subsequent filings would show whether this remains a passive investor profile or evolves into an active engagement.

Key Figures

Beneficial ownership: 49,140,882 shares Percent of class: 16.26% Sole voting power: 34,783,416 shares +2 more

5 metrics

Beneficial ownership 49,140,882 shares Amount beneficially owned reported in Schedule 13G/A

Percent of class 16.26% Percent of common stock class reported

Sole voting power 34,783,416 shares Shares with sole power to vote or direct the vote

Shared voting power 14,357,466 shares Shares with shared power to vote or direct the vote

Signature date 05/15/2026 Date on amendment signature block

Key Terms

beneficially owned, sole voting power, Schedule 13G/A

3 terms

beneficially owned regulatory

"Amount beneficially owned: 49,140,882"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power regulatory

"Sole power to vote or to direct the vote: 34,783,416"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Schedule 13G/A regulatory

"This is being filed on behalf of EdgePoint Investment Group Inc."

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

FAQ

What stake does EdgePoint (MAT) hold in Mattel?

EdgePoint beneficially owns 49,140,882 shares, representing 16.26% of Mattel's common stock. This figure is reported in the Schedule 13G/A amendment and carries the voting and dispositive power breakdown shown in the filing.

How many shares does EdgePoint control outright in Mattel?

EdgePoint has sole voting power over 34,783,416 shares and sole dispositive power over the same 34,783,416 shares, as stated on the Schedule 13G/A amendment signed 05/15/2026 by the Chief Compliance Officer.

What portion of EdgePoint's stake is shared voting power?

The filing shows shared voting power of 14,357,466 shares. That shared voting figure is part of the reported total beneficial ownership of 49,140,882 shares and is disclosed in the Schedule 13G/A amendment.

Who signed the Schedule 13G/A amendment for EdgePoint?

The amendment was signed by Sayuri Childs, identified as Chief Compliance Officer. The signature block shows the filing date as 05/15/2026 and lists EdgePoint's Toronto address in the form details.

Does this filing indicate active control or intent to influence Mattel?

The filing reports beneficial ownership and voting/dispositive power breakdowns only. It does not state any expressed intent to control or influence; the Schedule 13G/A amendment is a holdings disclosure and contains no operational or intent language.

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

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Accepted by SEC EDGAR 05/15/2026 - 04:10 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 12)

MATTEL, INC.

(Name of Issuer)

Common stock, $1.00 per share

(Title of Class of Securities)

577081102

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 577081102

1

Names of Reporting Persons

EdgePoint Investment Group Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 34,783,416.00
6	Shared Voting Power 14,357,466.00
7	Sole Dispositive Power 34,783,416.00
8	Shared Dispositive Power 14,357,466.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

49,140,882.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

16.26 %

12

Type of Reporting Person (See Instructions)

IA, FI

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MATTEL, INC.
(b)	Address of issuer's principal executive offices: 333 Continental Blvd., El Segundo, CA 90245-5012
Item 2.
(a)	Name of person filing: This Schedule 13G is being filed on behalf of EdgePoint Investment Group Inc. ("EdgePoint") with respect to the Common Stock, with par value $1.00 per share ("Common Stock"), of MATTEL, INC. (the "Issuer"). EdgePoint acts as investment manager to, and exercises investment discretion with respect to the Common Stock directly owned by, a number of private investment funds and mutual fund trusts.
(b)	Address or principal business office or, if none, residence: 150 Bloor Street West, Suite 700, Toronto, Ontario M5S 2X9, Canada
(c)	Citizenship: Ontario, Canada
(d)	Title of class of securities: Common stock, $1.00 per share
(e)	CUSIP No.: 577081102
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
	NA
Item 4.	Ownership
(a)	Amount beneficially owned: 49,140,882
(b)	Percent of class: 16.26%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 34,783,416
	(ii) Shared power to vote or to direct the vote: 14,357,466
	(iii) Sole power to dispose or to direct the disposition of: 34,783,416
	(iv) Shared power to dispose or to direct the disposition of: 14,357,466
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

EdgePoint Investment Group Inc.

Signature:	Sayuri Childs
Name/Title:	Sayuri Childs | Chief Compliance Officer
Date:	05/15/2026