X0306 4 2017-12-13 0001423221 Quanex Building Products CORP NX 0001251789 GRIFFITHS WILLIAM C 1800 WEST LOOP SOUTH, SUITE 1500 HOUSTON TX 77027 1 1 Chairman, President and CEO Common Stock 2017-12-13 4 A 0 10988 0 A 190960 D Common Stock 2017-12-13 4 F 0 4610 23.75 D 186350 D On December 3, 2014, the reporting person was granted a target number of performance share units, with a potential payout from 0% to 200% of target based on the Company's earnings per share growth and relative total shareholder return over the three year period from November 1, 2014 through October 31, 2017. The payout amount was finalized on December 12, 2017, resulting in the issuance of common stock on December 13, 2017. /s/ Paul B. Cornett, Power of Attorney 2017-12-14