MATTEL INC /DE/

Evaluation of Disclosure Controls and Procedures

As of March 31, 2026, Mattel's disclosure controls and procedures were evaluated, with the participation of Mattel's principal executive officer and principal financial officer, to assess whether they are effective in providing reasonable assurance that information required to be disclosed by Mattel in the reports that it files or submits under the Securities Exchange Act of 1934, as amended, is accumulated and communicated to management, including its principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure and to provide reasonable assurance that such information is recorded, processed, summarized, and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. Based on this evaluation, Ynon Kreiz, Mattel's principal executive officer, and Paul Ruh, Mattel's principal financial officer, concluded that these disclosure controls and procedures were effective to provide reasonable assurance as of March 31, 2026.

Changes in Internal Control Over Financial Reporting

There were no changes in internal control over financial reporting that occurred during the quarter ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, Mattel's internal control over financial reporting. Mattel is in the final stages of implementing a new enterprise resource planning system and related financial systems to replace certain existing core financial systems, with go-live in the second quarter of 2026. While these changes have not yet materially affected internal control over financial reporting as of March 31, 2026, they are reasonably likely to materially affect internal control over financial reporting in future periods as the systems are placed into service. Mattel will continue to monitor the impact of these systems on its internal control over financial reporting.

PART II—OTHER INFORMATION