Exhibit 99.1 Atkore Inc. Announces Fourth Quarter 2024 Results Additional Highlights • On November 18, 2024, The Board of Directors declared a quarterly cash dividend of 0.32pershareofcommonstockpayableonDecember16,2024,tostockholdersofrecordonDecember6,2024•Full−year2025Netsalesexpectedtobeintherangeof2.9 - 3.2billion•Full−year2025AdjustedEBITDAoutlookof475 - 525million;Full−yearAdjustednetincomeperdilutedshareoutlookof7.80 - $8.90 HARVEY, IL. — Nove ...