Exhibit 99.1 Media Release Peabody Reports Results for the Quarter Ended March 31, 2026 Thermal Coal Volumes Exceed Expectations on Continued Strong Demand Seaborne Thermal Results Benefit from Rising Prices Centurion Mine Progressing Toward Full Longwall Production ST. LOUIS, May 5, 2026 – Peabody (NYSE: BTU) today reported net income attributable to common stockholders of $(32.4) million, or$(0.27) per diluted share, for the first quarter of 2026, compared to $34.4 million, or $0.27 per diluted share, in ...