UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported):

May 21, 2015

MATTEL, INC.

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number, including area code

(310) 252-2000

N/A

(Former Name or Former Address if Changed Since Last Report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Item 5.07 Submission of Matters to a Vote of Security Holders.

The Annual Meeting of Stockholders of Mattel, Inc. (“Mattel”) was held on May 21, 2015.

All of the nominees for director listed in Proposal 1 in the proxy statement were elected by a majority of the votes cast, as follows:

Proposal 2, a proposal to approve, on a non-binding, advisory basis, the compensation of Mattel’s named executive officers, was approved by the following vote:

Proposal 3, a proposal to approve the Mattel, Inc. Amended and Restated 2010 Equity and Long-Term Compensation Plan, was approved by the following vote:

Proposal 4, a proposal to ratify the selection of PricewaterhouseCoopers LLP as Mattel’s independent registered public accounting firm for the year ending December 31, 2015, was approved by the following vote:

Proposal 5, a stockholder proposal regarding an independent Board Chairman, was not approved by the following vote:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.