X0407 4 2023-06-01 0 0001530249 FS Bancorp, Inc. FSBW 0001368780 FULLER ROBERT B C/O FS BANCORP, INC. 6920 220TH STREET SW MOUNTLAKE TERRACE WA 98043 0 1 0 0 Chief Credit Officer 0 Common Stock 2023-06-01 4 S 0 5040 28.54 D 8080 D Common Stock 5816 I By ESOP Common Stock 290.5377 D The reported price in Column 4 is a weighted average price, These shares were sold in multiple transactions at prices ranging from $28.38 to $28.82 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in the footnote (1). /s/Robert B. Fuller 2023-06-02