Marathon Bancorp, Inc. (MBBC) Insider Trading
Over the last 3 months, MBBC insiders made 25 open-market buys and 0 sales, a net purchase of $120K (SEC Form 4). Multiple insiders bought within days of each other (cluster buying). Over the last 6 months, 0 institutions increased and 1 reduced their position (13F).
Insider Activity
Sentiment
100/100
Buys (3m)
25
Sells (3m)
0
Net (3m)
$119.7K
Insiders buyingCluster buying
Insider trades by month Buys Sells
Nov
Mar
May
Jun
Nov
Jun
Context3-month price +12.9%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 30, 2026 | Knopf Michelleofficer: EVP and COO | Tax | 225 | $15.49 |
| Jun 30, 2026 | Zillges Nicholas Wdirector, officer: President and CEO | Tax | 1,269 | $15.49 |
| Jun 30, 2026 | Spatz Noraofficer: EVP and CAO | Tax | 503 | $15.49 |
| Jun 30, 2026 | Selting-Buchberger Joyofficer: SVP and CFO | Tax | 522 | $15.49 |
| Jun 30, 2026 | Cornish Terryofficer: SVP and CCO | Tax | 247 | $15.49 |
| Jun 17, 2026 | Zillges Nicholas Wdirector, officer: President and CEO | Buy | 970 | $15.00 |
| Jun 16, 2026 | Grimm Thomas Ldirector | Grant | 8,467 | $14.55 |
| Jun 16, 2026 | Zientara Amydirector, other: Chairwoman of the Board | Grant | 3,386 | — |
| Jun 16, 2026 | Zientara Amydirector, other: Chairwoman of the Board | Grant | 8,467 | $14.55 |
| Jun 16, 2026 | Werth Ann Mdirector | Grant | 3,386 | — |
| Jun 16, 2026 | Werth Ann Mdirector | Grant | 8,467 | $14.55 |
| Jun 16, 2026 | Wimmer Timothy Rdirector | Grant | 3,386 | — |
| Jun 16, 2026 | Cornish Terryofficer: SVP and CCO | Grant | 3,500 | — |
| Jun 16, 2026 | Cornish Terryofficer: SVP and CCO | Grant | 7,000 | $14.55 |
| Jun 16, 2026 | Knopf Michelleofficer: EVP and COO | Grant | 5,450 | — |
| Jun 16, 2026 | Knopf Michelleofficer: EVP and COO | Grant | 10,000 | $14.55 |
| Jun 16, 2026 | Zillges Nicholas Wdirector, officer: President and CEO | Grant | 16,934 | — |
| Jun 16, 2026 | Zillges Nicholas Wdirector, officer: President and CEO | Grant | 42,335 | $14.55 |
| Jun 16, 2026 | Spatz Noraofficer: EVP and CAO | Grant | 6,450 | — |
| Jun 16, 2026 | Spatz Noraofficer: EVP and CAO | Grant | 11,000 | $14.55 |
| Jun 16, 2026 | Grimm Thomas Ldirector | Grant | 3,386 | — |
| Jun 16, 2026 | Wimmer Timothy Rdirector | Grant | 8,467 | $14.55 |
| Jun 11, 2026 | Zillges Nicholas Wdirector, officer: President and CEO | Buy | 21 | $13.77 |
| Jun 11, 2026 | Cornish Terryofficer: SVP and CCO | Buy | 263 | $13.75 |
| Jun 11, 2026 | Cornish Terryofficer: SVP and CCO | Buy | 27 | $13.77 |
| Jun 11, 2026 | Cornish Terryofficer: SVP and CCO | Buy | 116 | $14.25 |
| Jun 11, 2026 | Spatz Noraofficer: EVP and CAO | Buy | 602 | $14.75 |
| Jun 11, 2026 | Spatz Noraofficer: EVP and CAO | Buy | 1,904 | $14.50 |
| Jun 11, 2026 | Spatz Noraofficer: EVP and CAO | Buy | 197 | $14.24 |
| Jun 11, 2026 | Spatz Noraofficer: EVP and CAO | Buy | 320 | $14.25 |
Source: MBBC SEC Form 4 filings, latest Jun 30, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their MBBC positions over the last 6 months (SEC Form 13F).
Increased
0
New positions
2
Reduced
1
Sold out
1
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| ALLIANCEBERNSTEIN L.P. | Unchanged | 153K | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 153K | May 15, 2026 |
| MALTESE CAPITAL MANAGEMENT LLC | Unchanged | 145K | May 15, 2026 |
| RAFFLES ASSOCIATES LP | Unchanged | 108K | May 15, 2026 |
| MINERVA ADVISORS LLC | Unchanged | 59K | May 12, 2026 |
| KLCM ADVISORS, INC. | Unchanged | 34K | Apr 30, 2026 |
| STILWELL VALUE LLC | Unchanged | 20K | May 6, 2026 |
| VANGUARD FIDUCIARY TRUST CO | New Position | 16K | May 8, 2026 |
| TOWER RESEARCH CAPITAL LLC (TRC) | Reduced | 226 | May 15, 2026 |
| BANK OF AMERICA CORP /DE/ | Sold Out | 0 | Feb 17, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.