X0508 4 2025-11-17 0 0001666138 Atkore Inc. ATKR 0001674314 Kelly Daniel S 16100 SOUTH LATHROP AVENUE HARVEY IL 60426 0 1 0 0 VP, General Counsel and Sec. 0 Common Stock 2025-11-17 4 A 0 6187 0 A 33167.3425 D Common Stock 2025-11-18 4 F 0 683 65.10 D 32484.3425 D Represents restricted stock units ("RSUs"). The RSUs vest ratably in three installments on each anniversary of November 17, 2025, subject to continued employment. The RSUs settle into common stock of the Issuer no later than March 15th of the calendar year immediately following the calendar year in which vesting occurs. Includes unvested restricted stock units ("RSUs") and amounts accrued for dividend equivalent units on such RSUs. Securities withheld to pay withholding taxes on vested restricted stock units ("RSUs") exempt under Rule 16b-3. /s/ Daniel S. Kelly 2025-11-19