Atkore INC. (ATKR) SEC Filings — 2026 1 SEC filing for Atkore INC. (ATKR) in 2026. FilingsAtkore INC. 8-K Filing — 8-K · Apr 8, 2026 ExploreAll ATKR Filings · ATKR 2025 · All 2026 Filings