UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934

(Amendment No.   )

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☐	Preliminary Proxy Statement
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☐	Definitive Proxy Statement
☒	Definitive Additional Materials
☐	Soliciting Material Pursuant to §240.14a-12
Mattel, Inc.
(Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)
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***  Exercise Your Right to Vote  ***

Important Notice Regarding the Availability of Proxy Materials for the

Stockholder Meeting to Be Held on May 17, 2018.

MATTEL, INC.

MATTEL, INC.

333 CONTINENTAL BLVD.

EL SEGUNDO, CA 90245-5012

Meeting Information

Meeting Type:         Annual Meeting

For holders as of:    March 23, 2018

Date: May 17, 2018        Time: 12:15 p.m.

Location: Mattel Conference and Leadership Center

1955 East Grand Avenue

El Segundo, CA 90245

You are receiving this communication because you hold shares in the company named above.

This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.

See the reverse side of this notice to obtain proxy materials and voting instructions.

—  Before You Vote  —

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

PROXY STATEMENT AND NOTICE     ANNUAL REPORT    ADMISSION POLICY

How to View Online:

Have the information that is printed in the box marked by the arrow (located on the following page) and visit: www.proxyvote.com.

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1) BY INTERNET:	www.proxyvote.com
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—  How To Vote  —

Please Choose One of the Following Voting Methods

      Vote In Person: Many stockholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow (located on the following page) available and follow the instructions. Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

	Voting Items
		The Board of Directors recommends a vote “FOR” all nominees listed.
		1.    Election of Directors.        Nominees:        1a.    R. Todd Bradley        1b.    Michael J. Dolan        1c.    Trevor A. Edwards        1d.    Margaret H. Georgiadis        1e.    Ynon Kreiz        1f.    Soren T. Laursen        1g.    Ann Lewnes        1h.    Dominic Ng        1i.    Vasant M. Prabhu        1j.    Rosa G. Rios
			The Board of Directors recommends a vote “FOR” Proposal 2.
			2.	Ratification of the selection of PricewaterhouseCoopers LLP as Mattel, Inc.’s independent registered public accounting firm for the year ending December 31, 2018.
			The Board of Directors recommends a vote “FOR” Proposal 3.
			3.	Advisory vote to approve named executive officer compensation, as described in the Mattel, Inc. Proxy Statement.
			The Board of Directors recommends a vote “FOR” Proposal 4.
			4.	Approval of First Amendment to Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan.
			The Board of Directors recommends a vote “AGAINST” Proposal 5.
			5.	Stockholder proposal regarding an independent Board Chairman.
			NOTE: Such other business as may properly come before the meeting or any adjournment thereof.