EXHIBIT 99.1 GrafTech Reports Second Quarter 2025 Results Continuing to Deliver on Key Commercial, Operational and Financial Objectives BROOKLYN HEIGHTS, Ohio - July 25, 2025 - GrafTech International Ltd. (NYSE: EAF) ("GrafTech," the "Company," "we," or "our") today announced its unaudited financial results for the quarter and six months ended June 30, 2025. Highlights Second Quarter 2025 Summary 1 • Grew sales volume 12% year-over-year for the second quarter of 2025, resulting in GrafTech's highest sales v ...