NEWS RELEASE Exhibit 99.1 MATTEL REPORTS SECOND QUARTER 2024 FINANCIAL RESULTS Second Quarter 2024 Highlights Versus Prior Year • Net Sales of $1,080 million, down 1% as reported, and comparable in constant currency • Gross Margin of 49.2%, an increase of 410 basis points; Adjusted Gross Margin of 49.2%, an increase of 430 basis points • Operating Income of $83 million, an improvement of $20 million; Adjusted Operating Income of $96 million, an improvement of $21 million • Net Income of $57 million, an impr ...