EdgePoint Investment Group (MAT) reports 51M-share, 17.57% beneficial stake in Mattel

Rhea-AI Filing Summary

EdgePoint Investment Group Inc. filed an amended Schedule 13G reporting its beneficial ownership of common stock of Mattel, Inc. EdgePoint, acting as investment manager for various private investment funds and mutual fund trusts, reports beneficial ownership of 51,047,454 Mattel common shares, representing 17.57% of the outstanding class.

EdgePoint reports sole voting and dispositive power over 36,425,584 shares and shared voting and dispositive power over an additional 14,621,870 shares. The filing is signed by Sayuri Childs, Chief Compliance Officer of EdgePoint.

Key Figures

Beneficial ownership: 51,047,454 shares Percent of class: 17.57% Sole voting power: 36,425,584 shares +3 more

6 metrics

Beneficial ownership 51,047,454 shares Total Mattel common shares EdgePoint reports as beneficially owned

Percent of class 17.57% Percentage of Mattel common stock class reported as beneficially owned

Sole voting power 36,425,584 shares Shares over which EdgePoint has sole power to vote or direct the vote

Shared voting power 14,621,870 shares Shares over which EdgePoint has shared power to vote or direct the vote

Sole dispositive power 36,425,584 shares Shares over which EdgePoint has sole power to dispose or direct disposition

Shared dispositive power 14,621,870 shares Shares over which EdgePoint has shared power to dispose or direct disposition

Key Terms

beneficially owned, sole voting power, shared voting power, dispositive power, +1 more

5 terms

beneficially owned financial

"Amount beneficially owned: 51,047,454"

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 financial

"Sole power to vote or to direct the vote: 36,425,584"

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.

shared voting power financial

"Shared power to vote or to direct the vote: 14,621,870"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

dispositive power financial

"Sole power to dispose or to direct the disposition of: 36,425,584"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

investment discretion financial

"exercises investment discretion with respect to the Common Stock"

FAQ

What percentage of Mattel (MAT) does EdgePoint Investment Group currently report owning?

EdgePoint Investment Group reports beneficial ownership of 17.57% of Mattel’s common stock. This corresponds to 51,047,454 shares of common stock, $1.00 par value per share, as disclosed in the Schedule 13G/A filing.

How many Mattel (MAT) shares does EdgePoint Investment Group beneficially own?

EdgePoint Investment Group reports beneficial ownership of 51,047,454 Mattel common shares. This stake is held in its capacity as investment manager for multiple private investment funds and mutual fund trusts investing in Mattel stock.

What voting power does EdgePoint have over its Mattel (MAT) shares?

EdgePoint reports sole voting power over 36,425,584 Mattel shares and shared voting power over 14,621,870 shares. Together, these amounts reflect how EdgePoint can vote or direct the vote for its reported beneficial holdings.

What dispositive power does EdgePoint report over Mattel (MAT) shares?

EdgePoint reports sole dispositive power over 36,425,584 Mattel shares and shared dispositive power over 14,621,870 shares. Dispositive power refers to the authority to dispose of or direct the disposition of the securities.

In what capacity is EdgePoint Investment Group involved with Mattel (MAT) shares?

EdgePoint acts as an investment manager and exercises investment discretion over Mattel common stock held by various private investment funds and mutual fund trusts, which directly own the reported 51,047,454 shares.

Who signed the Schedule 13G/A related to Mattel (MAT) for EdgePoint?

The Schedule 13G/A for Mattel common stock on behalf of EdgePoint was signed by Sayuri Childs, who is identified as Chief Compliance Officer. The signature date disclosed is 08/14/2026.

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Available on EDGAR 08/14/2026 - 08:40 AM Accepted by SEC EDGAR 08/14/2026 - 08:39 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 13)

MATTEL, INC.

(Name of Issuer)

Common stock, $1.00 per share

(Title of Class of Securities)

577081102

(CUSIP Number)

06/30/2026

(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 36,425,584.00
6	Shared Voting Power 14,621,870.00
7	Sole Dispositive Power 36,425,584.00
8	Shared Dispositive Power 14,621,870.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

51,047,454.00

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)

17.57 %

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: 51,047,454
(b)	Percent of class: 17.57%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 36,425,584
	(ii) Shared power to vote or to direct the vote: 14,621,870
	(iii) Sole power to dispose or to direct the disposition of: 36,425,584
	(iv) Shared power to dispose or to direct the disposition of: 14,621,870
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:	08/14/2026