Exhibit No. 99.1 News Release CMC REPORTS SECOND QUARTER FISCAL 2024 RESULTS • Second quarter net earnings of $85.8 million, or$0.73 per diluted share • Consolidated core EBITDA of $224.4 million; core EBITDA margin of 12.1% • Downstream contract awards rebounded to the highest quarterly level in nearly two years, signaling strength in the pipeline ahead of the upcoming construction season • North America and Europe Steel Groups achieved meaningful year-over-year improvements in controllable costs per ton ...