MBBC (Marathon Bancorp, Inc. Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by MBBC officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-17 | Nicholas W Zillges | President and CEO | Buy | — | — |
| 2026-06-16 | Timothy R Wimmer | Director | A | — | — |
| 2026-06-16 | Michelle Knopf | EVP and COO | A | — | — |
| 2026-06-16 | Terry Cornish | SVP and CCO | A | — | — |
| 2026-06-16 | Nora Spatz | EVP and CAO | A | — | — |
| 2026-06-16 | Ann M Werth | Director | A | — | — |
| 2026-06-16 | Thomas L Grimm | Director | A | — | — |
| 2026-06-16 | Amy Zientara | Director | A | — | — |
| 2026-06-16 | Nicholas W Zillges | President and CEO | A | — | — |
| 2026-06-11 | Nora Spatz | EVP and CAO | Buy | — | — |
| 2026-06-11 | Nicholas W Zillges | President and CEO | Buy | — | — |
| 2026-06-11 | Michelle Knopf | EVP and COO | Buy | — | — |
| 2026-06-11 | Terry Cornish | SVP and CCO | Buy | — | — |
| 2026-06-05 | Thomas L Grimm | Director | M | — | — |
| 2026-06-05 | Nicholas W Zillges | President and CEO | M | — | — |
| 2026-06-05 | Timothy R Wimmer | Director | M | — | — |
| 2026-06-05 | Amy Zientara | Director | M | — | — |
| 2026-06-05 | Nora Spatz | EVP and CAO | M | — | — |
| 2026-05-19 | Nora Spatz | EVP and CAO | F | — | — |
| 2026-05-19 | Terry Cornish | SVP and CCO | F | — | — |
| 2026-05-19 | Michelle Knopf | EVP and COO | F | — | — |
| 2026-05-19 | Joy Selting-Buchberger | SVP and CFO | F | — | — |
| 2026-05-06 | Ann M Werth | Director | M | — | — |
| 2026-03-20 | Thomas L Grimm | Director | M | — | — |
| 2026-03-18 | Nora Spatz | EVP and CAO | M | — | — |
| 2026-02-24 | Nicholas W Zillges | President and CEO | M | — | — |
| 2025-12-03 | Michelle Knopf | EVP and COO | I | — | — |
| 2025-12-03 | Nicholas W Zillges | President and CEO | I | — | — |
| 2025-12-03 | Nora Spatz | EVP and CAO | I | — | — |
| 2025-11-28 | Nicholas W Zillges | President and CEO | Buy | — | — |
| 2025-11-14 | Nicholas W Zillges | President and CEO | Buy | — | — |
| 2025-07-02 | Nicholas W Zillges | President and CEO | F | — | — |
| 2025-07-01 | Nora Spatz | EVP and CAO | F | — | — |
| 2025-07-01 | Terry Cornish | SVP and CCO | F | — | — |
| 2025-07-01 | Michelle Knopf | EVP and COO | F | — | — |
| 2025-07-01 | Nicholas W Zillges | President and CEO | F | — | — |
| 2025-07-01 | Joy Selting-Buchberger | SVP and CFO | F | — | — |
| 2025-06-16 | Nicholas W Zillges | President and CEO | Buy | — | — |
| 2025-06-03 | Nicholas W Zillges | President and CEO | I | — | — |
| 2025-06-03 | Nora Spatz | EVP and CAO | I | — | — |
| 2025-05-20 | Nicholas W Zillges | President and CEO | Buy | — | — |
| 2025-05-20 | Michelle Knopf | EVP and COO | F | — | — |
| 2025-05-20 | Terry Cornish | SVP and CCO | F | — | — |
| 2025-05-20 | Nora Spatz | EVP and CAO | F | — | — |
| 2025-05-20 | Joy Selting-Buchberger | SVP and CFO | F | — | — |
| 2025-04-22 | Thomas L Grimm | Director | A | — | — |
| 2025-04-22 | Nicholas W Zillges | President and CEO | A | — | — |
| 2025-04-22 | Ann M Werth | Director | A | — | — |
| 2025-04-22 | Amy Zientara | Director | A | — | — |
| 2025-04-22 | Terry Cornish | SVP and CCO | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | President and CEO | 108,365 | — |
| — | EVP and CAO | 29,197 | — |
| — | Director | 28,678 | — |
| — | EVP and COO | 28,121 | — |
| — | Director | 27,110 | — |
| — | Director | 20,246 | — |
| — | SVP and CCO | 8,753 | — |
| — | Director | 8,501 | — |
| — | SVP and CFO | 6,546 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the MBBC quote page; the site-wide leaderboard is on the insider transactions hub.