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Marathon Bancorp, Inc. /MD/

For the period ended Dec 31, 2025. Filed Feb 11, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Dec 31, 2025 · Filed Feb 11, 2026

MBBC$14.78+2.6%Stored close · as of Nov 6, 2026
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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended December 31, 2025

or

☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ________ to ________

Commission File Number:001-42608

MARATHON BANCORP, INC.

(Exact name of registrant as specified in its charter)

Maryland86-2191258
(State or other jurisdiction ofincorporation or organization)(I.R.S. EmployerIdentification No.)
500 Scott Street, Wausau, Wisconsin54403
(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:**(715)**845-7331

Securities registered pursuant to Section 12(b) of the Act:

​​
Title of each classTradingSymbol(s)Name of each exchange on which registered
Common Stock, $.01 par valueMBBCThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ⌧ No☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Yes ⌧ No☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “small reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer☐Accelerated filer☐
Non-accelerated filer⌧Smaller reporting company☒
Emerging growth company☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Exchange Act.☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes☐ No⌧

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practical date:

As of February 10, 2026, there were 2,938,620 shares of the registrant’s common stock issued and outstanding.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.