X0306 4 2016-11-30 0 0001666138 Atkore International Group Inc. ATKR 0001276299 MALLAK JAMES A 16100 SOUTH LATHROP AVENUE HARVEY IL 60426 0 1 0 0 VP and Chief Financial Officer Common Stock 2016-11-30 4 A 0 5828 0.00 A 46928 D Stock Options (right to buy) 21.45 2016-11-30 4 A 0 14140 0.00 A 2026-11-30 Common Stock 14140 14140 D Represents restricted stock units ("RSUs"). The RSUs vest ratably in three installments on each anniversary of November 30, 2016, 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. Represents stock options. The options vest and become exercisable ratably in three installments on each anniversary of November 30, 2016, subject to continued employment. /s/ Daniel S. Kelly, Attorney-in-Fact for James A. Mallak 2016-12-02