X0306 4/A 2017-02-10 2017-02-14 0 0001530249 FS Bancorp, Inc. FSBW 0001548095 Mullet Matthew D. C/O FS BANCORP, INC. 6920 220TH STREET SW MOUNTLAKE TERRACE WA 98043 0 1 0 0 CFO & COO Common Stock 2017-02-10 4 M 0 5763 16.89 A 26281 D Common Stock 2017-02-10 4 S 0 2822 39.11 D 23459 D Common Stock 2017-02-13 4 S 0 2941 38.75 D 20518 D Common Stock 2800 I By spouse's IRA Common Stock 11062 I By IRA Stock Option (Right to Buy) 16.89 2017-02-10 4 M 0 5763 0 D 2024-05-08 Common Stock 5763 11737 D The reported price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $38.90 to $39.30 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 footnote (1). This Form 4/A is being filed to correct this amount, which was inadvertently reported as 5,763 shares (which represents the total shares sold on 2/10/17 and 2/13/17. The reported price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $38.50 to $38.90 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 footnote (3). Stock options awarded pursuant to the FS Bancorp, Inc. 2013 Equity Incentive Plan. Vests in equal installments of 20% per year beginning on May 8, 2015. /s/Matthew D. Mullet 2020-08-10