Executive Change · Reg FD Disclosure

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): January 13, 2025     MATTEL, INC. (Exact name of registrant as specified in its charter)       Delaware   001-05647   95-1567322 (State or other jurisdiction of incorporation)   (Commission File No.)   (I.R.S. Employer Identification No.) 333 Continental Boulevard El Segundo , California 90245-5012 (Address of principal executive offices) 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:     ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)     ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)     ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))     ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:   Title of each class   Trading Symbol(s)   Name of each exchange on which registered Common Stock, $1.00 per share   MAT   The Nasdaq Global Select Market Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐       Section 5 – Corporate Governance and Management Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On January 13, 2025, Anthony DiSilvestro, the Chief Financial Officer (“CFO”) of Mattel, Inc. (“Mattel” or the “Company”), informed the Company of his intent to retire effective May 15, 2025. The Company has retained an executive search firm to assist with its CFO search. To support the transition of his role to a successor, Mr. DiSilvestro has agreed to serve as an advisor to the Company for a period of 90 days following his retirement date. In exchange for such services, the Company will pay Mr. DiSilvestro an advisory fee in the amount of $50,000 per month. Section 7 – Regulation FD Item 7.01. Regulation FD Disclosure. On January 16, 2025, the Company issued a press release announcing Mr. DiSilvestro’s retirement, a copy of which is furnished as Exhibit 99.1 hereto. In accordance with General Instruction B.2 of Form 8-K, the information in this Item 7.01, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. Section 9 – Financial Statements and Exhibits   Item 9.01. Financial Statements and Exhibits.   Exhibit No.    Exhibit Description 99.1**    Press release dated January 16, 2025 104    Cover Page Interactive Data File (embedded within the Inline XBRL Document)   ** Furnished herewith SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.   MATTEL, INC. Registrant By:   /s/ Jonathan Anschell   Name:    Jonathan Anschell   Title:    Executive Vice President, Chief Legal Officer, and Secretary Dated: January 16, 2025