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, Inc. President and CEO Nicholas W. Zillges reported an open-market purchase of 970 shares of common stock at $15.00 per share on June 16, 2026, increasing his direct ownership to 57,205 shares.
He also reports indirect holdings of 4,429 shares by an ESOP, 604 shares by an IRA, and 51,160 shares by a 401(k). In addition, he holds stock options on 42,335 shares at $14.55 per share expiring on June 15, 2036, 3,000 shares at $6.48 expiring on May 16, 2033, and 29,994 shares at $8.13 expiring on June 28, 2032, with related vesting schedules described in the filing.
Marathon Bancorp, Inc. director Ann M. Werth reported equity compensation awards rather than market trades. She received a grant of 3,386 shares of common stock at no cost, bringing her directly held common stock to 8,501 shares. She was also granted 8,467 stock options with an exercise price of $14.55 per share, which begin vesting at a rate of 20% per year starting on June 15, 2027.
The filing also lists previously granted stock options covering 900 shares at an exercise price of $6.48 per share and 600 shares at $8.13 per share, expiring in 2033 and 2032, respectively. Footnotes explain that both restricted stock and options vest in 20%-per-year increments from their stated commencement dates, underscoring that these are structured, time-based compensation awards with no reported stock sales.
Marathon Bancorp director Timothy R. Wimmer reported new equity awards in common stock and stock options. He received 3,386 shares of common stock as a grant at no cash cost, bringing his directly held common stock to 6,384 shares, separate from 13,862 shares held indirectly by a trust.
Wimmer was also granted 8,467 stock options on common stock with a $14.55 exercise price, all held directly. The restricted stock and these new options vest 20% per year starting on June 15, 2027, while earlier restricted stock and option awards continue vesting annually from June 28, 2023 and May 16, 2024.
Marathon Bancorp director Thomas L. Grimm reported new equity awards and updated holdings. He received 3,386 shares of common stock as a grant at no cost, increasing his directly held common stock to 6,384 shares. Separately, a trust associated with him holds 22,294 shares of common stock.
Grimm was also granted 8,467 stock options with an exercise price of $14.55 per share, all held directly. These options vest at a rate of 20% per year commencing on June 15, 2027. He continues to hold previously granted options covering 600 shares at $6.48 and 2,400 shares at $8.13, each vesting 20% annually from earlier dates.
Marathon Bancorp, Inc. director and Chairwoman of the Board Amy Zientara reported new equity compensation awards. She received 3,386 shares of Common Stock as a grant at $0.00 per share, increasing her direct Common Stock holdings to 27,110 shares. She was also granted stock options on 8,467 shares of Common Stock with an exercise price of $14.55 per share, exercisable through June 15, 2036. The filing also lists previously granted stock options on 600 shares at $6.48 per share expiring in 2033 and 2,400 shares at $8.13 per share expiring in 2032. Footnotes state that both the restricted stock and these options vest in installments of 20% per year beginning on their respective commencement dates.
Marathon Bancorp, Inc. senior vice president and chief credit officer Terry Cornish received new equity compensation. He was granted 3,500 shares of common stock at $0.00 per share and 7,000 stock options with a $14.55 exercise price. The restricted stock and these options vest 20% per year starting on June 15, 2027. After the grant, he directly holds 6,503 common shares and retains earlier stock options covering 4,804 shares at $6.48 (expiring 2033) and 4,498 shares at $8.13 (expiring 2032), alongside additional indirect holdings through an ESOP and a 401(k).
Marathon Bancorp, Inc. executive Michelle Knopf reported new equity awards and updated holdings. As EVP and COO, she received a grant of 5,450 shares of common stock at $0.0000 per share, increasing her direct common stock holdings to 8,782 shares. She was also granted 10,000 stock options with an exercise price of $14.5500 per share, expiring on June 15, 2036, which vest 20% per year starting on June 15, 2027.
In addition, Knopf holds indirect common stock through employee benefit plans, including 2,235 shares held by an ESOP and 19,339 shares held by a 401(k) plan. She also retains previously granted stock options covering 4,804 shares at $6.4800 per share expiring in 2033 and 4,498 shares at $8.1300 per share expiring in 2032, which vest 20% per year from earlier grant dates.
Marathon Bancorp, Inc. reported that President and CEO Nicholas W. Zillges received a grant of 16,934 shares of Common Stock and 42,335 stock options on June 15, 2026. The shares and options were awarded at no cash cost per share as compensation, not through open‑market buying.
The 16,934 restricted shares vest in 20% annual installments starting on June 15, 2027, aligning value over time. The 42,335 stock options have a $14.55 exercise price and also vest 20% per year from June 15, 2027, with an expiration on June 15, 2036. Following the grant, Zillges directly holds 56,235 common shares and maintains additional indirect holdings through plan accounts.
Marathon Bancorp, Inc. executive vice president and chief administrative officer Nora Spatz reported new equity compensation awards. She received 6,450 shares of common stock as a grant at a stated price of $0.00 per share, bringing her direct common stock holdings to 27,599 shares, including restricted stock that vests.
Spatz was also granted stock options on 11,000 shares of common stock with an exercise price of $14.55 per share, exercisable through 2036-06-15. Footnotes state the new restricted stock and these options vest at 20% per year commencing on June 15, 2027, and other previously granted restricted stock and options vest 20% per year from June 28, 2023 and May 16, 2024.
Marathon Bancorp senior executive Terry Cornish increased his stake in company stock through a series of open-market purchases. Over several days in early June 2026, he bought a total of 1,389 shares of Common Stock indirectly through a 401(k) plan at prices between $13.655 and $14.75 per share.
After these purchases, Cornish holds 27,205 shares indirectly via his 401(k), in addition to 3,003 shares held directly and 2,250 shares held through an ESOP. He also holds stock options on 4,804 shares at an exercise price of $6.48 per share and 4,498 shares at $8.13 per share, with expirations in 2033 and 2032, respectively.