Exhibit 99.1 Atkore Inc. Announces Second Quarter 2024 Results • Net sales of $792.9 million, down 11.5% versus prior year • Net income per diluted share decreased by $0.64 versus prior year to $3.67; Adjusted net income per diluted share decreased by $0.79 versus prior year to $4.08 • Net income decreased by $36.2 million versus prior year to $138.0 million; Adjusted EBITDA decreased by $64.1 million versus prior year to $211.9 million • Full-year Adjusted EBITDA outlook adjusted to $850 - $900 million; Ad ...