Marathon Bancorp, Inc. /MD/ SEC filings MBBC
Marathon Bancorp, Inc. /MD/ has 232 filings in SEC EDGAR's recent list, going back to Dec 11, 2020. Its latest annual report, Form ARS, was filed on Oct 13, 2026 for the period ended Jun 30, 2026. The latest quarterly report (Form 10-Q) was filed on May 13, 2026, covering the quarter ended Mar 31, 2026. The most recent current report (Form 8-K) was filed on Oct 1, 2026 (officer or director change). The company's fiscal year ends on June 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| ARS | Annual report to shareholders | Oct 13, 2026 | Jun 30, 2026 |
| DEF 14A | Proxy statement | Oct 13, 2026 | Nov 17, 2026 |
| 8-K |
Current report
Officer or director change
|
Oct 1, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Sep 18, 2026 | Sep 18, 2026 |
| 10-K | Annual report | Sep 16, 2026 | Jun 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 1, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 1, 2026 | — |
| 4 | Insider transaction | Jun 30, 2026 | Jun 28, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 28, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 28, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 28, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 28, 2026 |
| 11-K | Employee savings plan report | Jun 29, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 16, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 11, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 11, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 11, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 11, 2026 | Jun 3, 2026 |
| S-8 | Employee stock plan registration | Jun 9, 2026 | — |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 28, 2026 | May 28, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 10-Q | Quarterly report | May 13, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | May 6, 2026 | May 5, 2026 |
| 8-K |
Current report
Other events
|
Apr 24, 2026 | Apr 24, 2026 |
| DEF 14A | Proxy statement | Apr 24, 2026 | May 28, 2026 |
| 4 | Insider transaction | Mar 20, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 18, 2026 |
| 4 | Insider transaction | Feb 24, 2026 | Feb 23, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 17, 2026 | — |
| 10-Q | Quarterly report | Feb 11, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Nov 28, 2025 | Nov 26, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Nov 18, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 14, 2025 | Nov 13, 2025 |
| 10-Q | Quarterly report | Nov 12, 2025 | Sep 30, 2025 |
| ARS | Annual report to shareholders | Oct 15, 2025 | Jun 30, 2025 |
| DEF 14A | Proxy statement | Oct 15, 2025 | Nov 18, 2025 |
| S-8 | Employee stock plan registration | Sep 30, 2025 | — |
| 10-K | Annual report | Sep 26, 2025 | Jun 30, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Sep 2, 2025 | — |
| 4/A | Form 4/a | Jul 2, 2025 | Jun 28, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 28, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 28, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 28, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 28, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 28, 2025 |
| 11-K | Employee savings plan report | Jun 23, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jun 16, 2025 | Jun 13, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 29, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 29, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 10-Q | Quarterly report | May 14, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| CERT | Filing | Apr 21, 2025 | — |
| 8-A12B | Filing | Apr 21, 2025 | — |
| 8-K |
Current report
Other events
|
Apr 21, 2025 | Apr 21, 2025 |
| 8-K |
Current report
Other events
|
Apr 16, 2025 | Apr 16, 2025 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Mar 31, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Other events
|
Mar 24, 2025 | Mar 24, 2025 |
| 424B3 | Prospectus | Feb 21, 2025 | — |
| 424B3 | Prospectus | Feb 21, 2025 | — |
| 424B3 | Prospectus | Feb 21, 2025 | — |
| 8-K |
Current report
Other events
|
Feb 20, 2025 | Feb 20, 2025 |
| 8-K |
Current report
Material agreement
|
Feb 18, 2025 | Feb 11, 2025 |
| 10-Q | Quarterly report | Feb 13, 2025 | Dec 31, 2024 |
| EFFECT | Filing | Feb 11, 2025 | — |
| CORRESP | Letter to the SEC | Feb 7, 2025 | — |
| CORRESP | Letter to the SEC | Feb 7, 2025 | — |
| S-1/A | Amended registration statement | Feb 6, 2025 | — |
| UPLOAD | Letter from the SEC | Dec 19, 2024 | — |
| S-1 | Registration statement | Dec 13, 2024 | — |
| 425 | Filing | Dec 12, 2024 | — |
| 8-K |
Current report
Other events
|
Dec 12, 2024 | Dec 10, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Nov 19, 2024 | Nov 19, 2024 |
| 10-Q | Quarterly report | Nov 13, 2024 | Sep 30, 2024 |
| ARS | Annual report to shareholders | Oct 11, 2024 | Jun 30, 2024 |
| DEF 14A | Proxy statement | Oct 11, 2024 | Nov 19, 2024 |
| 10-K | Annual report | Sep 26, 2024 | Jun 30, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | May 16, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | May 16, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jun 28, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | May 16, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | May 16, 2024 |
| 11-K | Employee savings plan report | Jun 18, 2024 | Dec 31, 2023 |
| 4 | Insider transaction | May 28, 2024 | May 23, 2024 |
| 10-Q | Quarterly report | May 13, 2024 | Mar 31, 2024 |
| 4 | Insider transaction | Mar 7, 2024 | Mar 6, 2024 |
| 10-Q | Quarterly report | Feb 14, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Other events
|
Dec 26, 2023 | Dec 22, 2023 |
| 4 | Insider transaction | Dec 5, 2023 | Nov 30, 2023 |
| 4 | Insider transaction | Dec 5, 2023 | Nov 30, 2023 |
| 4 | Insider transaction | Dec 5, 2023 | Nov 30, 2023 |
| 4 | Insider transaction | Dec 5, 2023 | Nov 30, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Nov 21, 2023 | Nov 21, 2023 |
| 4 | Insider transaction | Nov 17, 2023 | Nov 16, 2023 |
| 10-Q | Quarterly report | Nov 14, 2023 | Sep 30, 2023 |
| ARS | Annual report to shareholders | Oct 17, 2023 | Jun 30, 2023 |
| DEF 14A | Proxy statement | Oct 17, 2023 | Nov 21, 2023 |
| 4 | Insider transaction | Oct 4, 2023 | Jun 28, 2023 |
| 4 | Insider transaction | Oct 4, 2023 | Jun 28, 2023 |
| 4 | Insider transaction | Oct 4, 2023 | Jun 28, 2023 |
| 4 | Insider transaction | Oct 4, 2023 | Jun 28, 2023 |
| 4 | Insider transaction | Oct 4, 2023 | Jun 28, 2023 |
| 10-K | Annual report | Sep 20, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Restatement
|
Sep 20, 2023 | Sep 19, 2023 |
| 4/A | Form 4/a | Jul 6, 2023 | May 16, 2023 |
| 4/A | Form 4/a | Jul 6, 2023 | May 16, 2023 |
| 4/A | Form 4/a | Jul 6, 2023 | May 16, 2023 |
| 4/A | Form 4/a | Jul 6, 2023 | May 16, 2023 |
| 4/A | Form 4/a | Jul 6, 2023 | May 16, 2023 |
| 11-K | Employee savings plan report | Jun 28, 2023 | Dec 31, 2022 |
| 4 | Insider transaction | Jun 13, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 13, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 13, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 13, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | May 22, 2023 | May 18, 2023 |
| 4 | Insider transaction | May 22, 2023 | May 18, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 16, 2023 |
| 10-Q | Quarterly report | May 12, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Other events
|
May 10, 2023 | May 10, 2023 |
| 10-Q | Quarterly report | Feb 14, 2023 | Dec 31, 2022 |
| 4 | Insider transaction | Dec 6, 2022 | Dec 2, 2022 |
| 4 | Insider transaction | Dec 6, 2022 | Dec 2, 2022 |
| 4 | Insider transaction | Dec 6, 2022 | Dec 2, 2022 |
| 4 | Insider transaction | Dec 6, 2022 | Dec 2, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Nov 22, 2022 | Nov 22, 2022 |
| 8-K |
Current report
Other events
|
Nov 16, 2022 | Nov 16, 2022 |
| 10-Q | Quarterly report | Nov 14, 2022 | Sep 30, 2022 |
| DEF 14A | Proxy statement | Oct 17, 2022 | Nov 22, 2022 |
| 10-K | Annual report | Sep 28, 2022 | Jun 30, 2022 |
| 4 | Insider transaction | Jul 8, 2022 | Jun 28, 2022 |
| 3 | Initial insider ownership | Jul 8, 2022 | Jun 28, 2022 |
| 8-K |
Current report
Officer or director change
|
Jun 30, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 4 | Insider transaction | Jun 29, 2022 | Jun 28, 2022 |
| 11-K | Employee savings plan report | Jun 28, 2022 | Dec 31, 2021 |
| S-8 | Employee stock plan registration | Jun 28, 2022 | — |
| 4 | Insider transaction | Jun 1, 2022 | May 27, 2022 |
| 4 | Insider transaction | Jun 1, 2022 | May 27, 2022 |
| 4 | Insider transaction | Jun 1, 2022 | May 27, 2022 |
| 4 | Insider transaction | Jun 1, 2022 | May 27, 2022 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 24, 2022 | May 24, 2022 |
| 4 | Insider transaction | May 18, 2022 | May 17, 2022 |
| 10-Q | Quarterly report | May 13, 2022 | Mar 31, 2022 |
| DEF 14A | Proxy statement | Apr 18, 2022 | May 24, 2022 |
| 10-Q | Quarterly report | Feb 11, 2022 | Dec 31, 2021 |
| 4 | Insider transaction | Dec 10, 2021 | Dec 8, 2021 |
| 4 | Insider transaction | Dec 10, 2021 | Dec 8, 2021 |
| 4 | Insider transaction | Dec 10, 2021 | Dec 8, 2021 |
| 3/A | Form 3/a | Dec 10, 2021 | Apr 14, 2021 |
| 3/A | Form 3/a | Dec 10, 2021 | Apr 14, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Nov 23, 2021 | Nov 23, 2021 |
| 10-Q | Quarterly report | Nov 12, 2021 | Sep 30, 2021 |
| DEF 14A | Proxy statement | Oct 22, 2021 | Nov 23, 2021 |
| 10-K | Annual report | Sep 28, 2021 | Jun 30, 2021 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Savings Institutions, Not Federally Chartered (SIC 6036)
- Listed as
- MBBC (Nasdaq)
- Fiscal year ends
- June 30
- Headquarters
- Wausau, WI
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1835385
Other Savings Institutions, Not Federally Chartered companies
- Flagstar Bank, National Association FLG
- Beacon Financial Corp BBT
- Heritage Financial Corp /WA/ HFWA
- NB Bancorp, Inc. NBBK
- Southern Missouri Bancorp, Inc. SMBC
- Third Coast Bancshares, Inc. TCBX
- Greene County Bancorp Inc GCBC
- Home Bancorp, Inc. HBCP
All 40 Savings Institutions, Not Federally Chartered companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.