Exhibit 99.1 Magnachip Reports Results for Second Quarter 2025 Q2 Results Summary Q2 2025 Highlights SEOUL, South Korea, July 31, 2025 – Magnachip Semiconductor Corporation (NYSE: MX) ("Magnachip" or the "Company") today announced financial results for the second quarter 2025. Y.J. Kim, Magnachip's CEO said, "In Q2, Magnachip delivered our fifth consecutive quarter of year-over-year revenue growth from continuing operations, driven primarily by strong performances in our communications and computing applica ...