X0306 4 2022-06-08 0001423221 Quanex Building Products CORP NX 0001229683 STEVENS CURTIS M 1800 WEST LOOP SOUTH-STE. 1500 HOUSTON TX 77027 1 Common Stock 2022-06-08 4 M 0 5987 19.77 A 5987 D Common Stock 2022-06-08 4 S 0 5987 24.52 D 0 D Stock Options (Right to Buy) 19.77 2022-06-08 4 M 0 5987 0 D 2012-10-31 2022-10-31 Common Stock 5987 0 D The price reported in Column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $24.16 to $24.79, inclusive. The reporting person undertakes to provide to NX, any security holder of NX, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The option became 100% exercisable immediately in whole or in part. Exhibit List: Exhibit 24 - Power of Attorney /s/ Paul B. Cornett, Power of Attorney 2022-06-08