X0206 3 2021-11-01 0 0001423221 Quanex Building Products CORP NX 0001891778 Garcia Kimberley 1800 W LOOP SOUTH, SUITE 1500 HOUSTON TX 77027 1 VP, CHRO Common Stock 7340.11 D The shares of common stock listed in column 2, Table I comprise (i) 3,700 shares of restricted stock that will vest on March 16, 2023, subject to the reporting person's continued employment; (ii) 3,600 shares of restricted stock that will vest on December 2, 2023, subject to the reporting person's continued employment; and (iii) 40.11 shares of non-restricted stock that were purchased through the Quanex Employee Stock Purchase Plan. /s/ Paul B. Cornett, Power of Attorney 2021-11-04