Welcome to our dedicated page for Marathon Bancorp SEC filings (Ticker: MBBC), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Marathon Bancorp, Inc. filings document its public-company reporting as the holding company for Marathon Bank and as the issuer of MBBC common stock listed on Nasdaq. The record includes 8-K disclosures for material corporate events such as stock repurchase programs and proxy-related filings for shareholder meetings.
Definitive proxy statements and voting reports describe board elections, independent auditor ratification, equity incentive plan matters and stockholder voting results. The filings also identify registered common stock, governance processes and capital actions for the bank holding company.
Marathon Bancorp director Amy Zientara exercised stock options to acquire additional common shares. On June 3, 2026 she exercised options for 899 shares at $6.48 per share and 3,599 shares at $8.13 per share, totaling 4,498 newly acquired shares.
The related derivative entries show these transactions were option exercises, not open-market purchases or sales. Footnotes indicate both her restricted stock and stock options vest at a rate of 20% per year starting in 2023 and 2024, highlighting that these awards are part of ongoing equity compensation.
Marathon Bancorp, Inc. EVP and CAO Nora Spatz exercised stock options to acquire additional common shares. On this Form 4, she exercised options covering 1,200 shares of common stock at an exercise price of $8.13 per share, bringing her directly held common stock to 21,149 shares.
She also reports various indirect holdings through a spouse, ESOP, custodial accounts, a trust, and a 401(k). Footnotes note that some reflected position changes were not required to be reported under Section 16 and that her restricted stock and stock options generally vest 20% per year beginning in 2023 and 2024.
Marathon Bancorp, Inc. President and CEO Nicholas W. Zillges reported an option exercise and updated his share holdings. He exercised stock options to acquire 1,500 shares of Common Stock at $6.48 per share, bringing his directly held Common Stock to 39,301 shares.
He now holds 29,994 stock options with an $8.13 exercise price expiring on June 28, 2032. Indirect holdings include 50,084 shares through a 401(k), 4,429 shares through an ESOP, and 604 shares through an IRA. Some entries reflect transactions not required to be reported under Section 16.
Marathon Bancorp director Thomas L. Grimm reported option-related activity and updated holdings. He exercised stock options covering 300 shares of Common Stock at $6.48 per share, with the acquired shares held indirectly by a trust, bringing that trust’s stake to 22,294 shares.
Grimm now also holds 2,998 Common shares directly, which include restricted stock that vests 20% per year beginning June 28, 2023. On the derivative side, he retains 600 stock options at a $6.48 exercise price expiring May 16, 2033, and a separate option position covering 2,400 shares at an $8.13 exercise price expiring June 28, 2032, both vesting in 20% annual installments.
Marathon Bancorp director Timothy R. Wimmer exercised stock options to acquire additional common shares on June 3, 2026. He exercised options for 899 shares of common stock at a conversion price of $6.48 per share and 3,599 shares at $8.13 per share, with the resulting common stock held indirectly by trusts.
Following these transactions, Wimmer holds 2,998 common shares directly, and indirect trust holdings reported total 13,862 and 12,963 common shares in separate entries. His remaining stock options after the exercises were 600 and 2,400 options in two series that vest 20% per year beginning in 2023 and 2024.
Marathon Bancorp, Inc. reported that stockholders approved its 2026 Equity Incentive Plan at a Special Meeting of Stockholders held on May 28, 2026. The plan allows the company and Marathon Bank to grant stock-based awards to officers, employees and directors, as previously described in the April 24, 2026 proxy statement.
The proposal to approve the plan received 2,024,653 votes for, 135,220 against and 98,908 abstentions. The approved plan is intended to support future equity-based compensation and alignment of management, staff and directors with stockholders.
Marathon Bancorp SVP and CCO Terry Cornish reported a small tax-related share disposition. On the reported date, 41 shares of common stock were withheld at $14.50 per share to cover tax obligations, a non‑market transaction coded as a tax-withholding disposition.
After this, Cornish directly held 3,003 common shares, plus indirect holdings of 1,478 shares through an ESOP and 25,816 shares through a 401(k). Cornish also held stock options over 4,804 shares at $6.48 expiring on May 16, 2033 and 4,498 shares at $8.13 expiring on June 28, 2032, which vest 20% per year starting in 2023 and 2024.
Marathon Bancorp, Inc. SVP and CFO Joy Selting-Buchberger reported updated holdings, including a tax-related share disposition. A total of 56 shares of common stock were withheld at $14.50 per share to cover tax obligations, leaving 5,282 directly held common shares. She also holds common stock indirectly through an ESOP (1,264 shares) and a 401(k) plan (21,788 shares). In addition, she retains stock options on 4,804 shares at an exercise price of $6.48 expiring on May 16, 2033, and options on 5,999 shares at $8.13 expiring on June 28, 2032. Footnotes note that related restricted stock and options vest 20% per year starting in 2023 and 2024.
Marathon Bancorp, Inc. EVP and CAO Nora Spatz reported updated holdings of the company’s common stock. A Form 4 entry shows an F-code tax-withholding disposition of 30 shares at $14.50 per share, leaving 19,949 directly held common shares.
She also reports several indirect holdings, including shares held by a spouse, ESOP, as custodian, a trust, and a 401(k) plan, plus stock options on 2,883 shares at $6.48 expiring in 2033 and 3,600 shares at $8.13 expiring in 2032, which vest 20% per year.
Marathon Bancorp, Inc. EVP and COO Michelle Knopf reported an update to her equity holdings in company securities. The filing shows a tax-withholding disposition of 86 shares of Common Stock at $14.50 per share, used to cover tax obligations rather than an open-market sale.
After this event, she holds 3,332 Common shares directly, plus indirect holdings of 1,274 shares through an ESOP and 18,298 shares through a 401(k). She also retains stock options over 4,804 shares at $6.48 and 4,498 shares at $8.13, which vest at 20% per year under existing equity award schedules.