SCHEDULE 13G 0002011184 XXXXXXXX LIVE Common Stock 12/31/2025 0001530249 FS Bancorp, Inc. 30263Y104 6920 220TH STREET SW MOUNTLAKE TERRACE WA 98043 Rule 13d-1(b) De Lisle Partners LLP X0 385451.00 0.00 385451.00 0.00 385451.00 5.1 FI FS Bancorp, Inc. 6920 220TH STREET SW, MOUNTLAKE TERRACE, WASHINGTON, 98043 Isabelle Cordwell-Riant 3 Firs Lane, Poole, BH14 8JG, United Kingdom United Kingdom N FI Institutional Investment Manager 385,451 5.1% 385,451 0 385,451 0 Y N Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to Institutional Investment Manager is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D. De Lisle Partners LLP Isabelle Cordwell-Riant 02/11/2026