Contact:  Nicholas Zillges

President and Chief Executive Officer

Wausau, Wisconsin – April 24, 2026 – Marathon Bancorp, Inc. (the “Company”) (Nasdaq: MBBC), the holding company for Marathon Bank, announced that is has adopted a stock repurchase program for up to approximately 5% of its outstanding shares of common stock, or 146,931 shares of its common stock.  This is the Company’s first stock repurchase program since completing its second step conversion and related stock offering in April 2025.

Repurchases are expected to commence after the Company publicly releases its results of operations at and for the three and nine months ended March 31, 2026. Shares may be repurchased in open market or private transactions, through block trades, or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities and Exchange Commission.

Repurchases will be made at management’s discretion at prices management considers to be attractive and in the best interests of both the Company and its stockholders, subject to the availability of stock, general market conditions, the trading price of the stock, alternative uses for capital, and the Company’s financial performance.  Open market purchases may be subject to the limitations set forth in Rule 10b-18 of the Securities and Exchange Commission and other applicable legal requirements.

The timing and amount of share repurchases under this authorization may be suspended, terminated or modified by the Company at any time for any reason, including market conditions, the cost of repurchasing shares, the availability of alternative investment opportunities, liquidity, and other factors deemed appropriate. These factors may also affect the timing and amount of share repurchases. The Company is not obligated to repurchase any particular number of shares or any shares in any specific time period.

Marathon Bancorp is the bank holding company for Marathon Bank, a Wisconsin-chartered savings bank headquartered in Wausau, Wisconsin.  The Bank conducts its business from its main office and four branch offices located in Marathon, Waukesha and Ozaukee Counties.

Certain statements herein constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 and are intended to be covered by the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Such statements may be identified by words such as “believes,” “will,” “expects,” “project,” “may,” “could,” “developments,” “strategic,” “launching,” “opportunities,” “anticipates,” “estimates,” “intends,” “plans,” “targets” and similar expressions. These statements are based upon the current beliefs and expectations of the Company’s management and are subject to significant risks and uncertainties. Actual results may differ materially from those set forth in the forward-looking statements as a result of numerous factors. Factors that could cause such differences to exist include, but are not limited to, general economic conditions, inflation, tariffs, changes in interest rates, data loss or other security breaches, unanticipated changes in our liquidity position, climate change, public health issues, geopolitical conflicts, increased unemployment, deterioration in the credit quality of the loan portfolio and/or the value of the collateral securing repayment of loans, reduction in the value of investment securities, the cost and ability to attract and retain key employees, regulatory considerations, and competition and the other risks described in the Company’s Annual Report on Form 10-K and Quarterly Reports on Form 10-Q as filed with the Securities and Exchange Commission. Should one or more of these risks materialize or should underlying beliefs or assumptions prove incorrect, the Company’s actual results could differ materially from those discussed. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this release.  Forward-looking statements speak only as of the date they are made, and we assume no obligation to update any of these statements in light of new information, future events or otherwise unless required under federal securities laws.