X0202 SCHEDULE 13G 0002142484 XXXXXXXX LIVE Common Stock, par value $0.01 per share 06/30/2025 0001835385 Marathon Bancorp, Inc. 565759206 500 Scott Street Wausau WI 54403 Rule 13d-1(b) Marathon Bank 401(k) Plan Trust b WI 0.00 193211.00 0.00 193211.00 193211.00 N 6.57 EP Marathon Bancorp, Inc. 500 Scott Street, Wausau, Wisconsin 54403 Marathon Bank 401(k) Plan Trust Trustee: Community Bank of Pleasant Hill, dba First Trust of MidAmerica 3500 N Village Dr. Suite 220 St. Joseph, Missouri 64506 Wisconsin N EP 193,211 6.57% 0 193,211 0 193,211 Y Y Y N The reporting person is an employee benefit plan subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended. Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Marathon Bank 401(k) Plan Trust /s/ Gerald Lau 07/01/2026