EXHIBIT 99.1 GrafTech Reports First Quarter 2024 Results Successfully Executing Strategic Initiatives To Reduce Costs and Preserve Long-term Flexibility BROOKLYN HEIGHTS, Ohio - April 26, 2024 - GrafTech International Ltd. (NYSE: EAF) ("GrafTech," the "Company," "we," or "our") today announced unaudited financial results for the quarter ended March 31, 2024. First Quarter 2024 Highlights • Net loss of $31 million, or $0.12 per share(1), and adjusted EBITDA(2) of $0.2 million • Net cash used in operating act ...