Marathon Bancorp, Inc. /MD/ SEC EDGAR Filings (CIK 0001835385)

SEC EDGAR filings, ownership reports, and insider transactions for Marathon Bancorp, Inc. /MD/.

Symbol
MBBC on Nasdaq
Industry
Savings Institutions, Not Federally Chartered (Office Of Finance)
Business address
500 Scott Street, Wausau, WI, 54403
Fiscal year end
30 June
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Marathon Bancorp, Inc. /MD/ has filed 186 SEC EDGAR filings since 11 Dec 2020

Latest Filings

Recent SEC filings for Marathon Bancorp, Inc. /MD/ including 4, 8-K, 10-Q and more.

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open 4 document View SEC filing for 4 FORM 4 03 Dec 2025 01 Dec 2025
4 Open 4 document View SEC filing for 4 FORM 4 03 Dec 2025 01 Dec 2025
4 Open 4 document View SEC filing for 4 FORM 4 03 Dec 2025 01 Dec 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 28 Nov 2025 26 Nov 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 18 Nov 2025 18 Nov 2025 001-42608
4 Open 4 document View SEC filing for 4 FORM 4 14 Nov 2025 13 Nov 2025
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 12 Nov 2025 30 Sep 2025 001-42608
ARS Open ARS document View SEC filing for ARS ARS 15 Oct 2025 30 Jun 2025 001-42608
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 15 Oct 2025 18 Nov 2025 001-42608
S-8 Open S-8 document | Open XBRL data View SEC filing for S-8 MARATHON BANCORP, INC. REGISTRATION STATEMENT FORM S-8 SEPTEMBER 30, 2025 30 Sep 2025 333-290635
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 26 Sep 2025 30 Jun 2025 001-42608
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 02 Sep 2025 005-92485
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 02 Jul 2025 28 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 01 Jul 2025 28 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 01 Jul 2025 28 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 01 Jul 2025 28 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 01 Jul 2025 28 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 01 Jul 2025 28 Jun 2025
11-K Open 11-K document View SEC filing for 11-K MARATHON BANCORP, INC. FORM 11-K DECEMBER 31, 2024 23 Jun 2025 31 Dec 2024 001-42608
4 Open 4 document View SEC filing for 4 FORM 4 16 Jun 2025 13 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 03 Jun 2025 29 May 2025
4 Open 4 document View SEC filing for 4 FORM 4 03 Jun 2025 29 May 2025
4 Open 4 document View SEC filing for 4 FORM 4 20 May 2025 16 May 2025
4 Open 4 document View SEC filing for 4 FORM 4 20 May 2025 16 May 2025
4 Open 4 document View SEC filing for 4 FORM 4 20 May 2025 16 May 2025
4 Open 4 document View SEC filing for 4 FORM 4 20 May 2025 16 May 2025
4 Open 4 document View SEC filing for 4 FORM 4 20 May 2025 16 May 2025
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 May 2025 31 Mar 2025 001-42608
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2025 21 Apr 2025
CERT Open CERT document View SEC filing for CERT 21 Apr 2025 001-42608
8-A12B Open 8-A12B document View SEC filing for 8-A12B 21 Apr 2025 001-42608
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 21 Apr 2025 21 Apr 2025 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K APRIL 16, 2025 16 Apr 2025 16 Apr 2025 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K MARCH 31, 2025 31 Mar 2025 31 Mar 2025 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K MARCH 24, 2025 24 Mar 2025 24 Mar 2025 000-56269
424B3 Open 424B3 document View SEC filing for 424B3 424B3 21 Feb 2025 333-283805
424B3 Open 424B3 document View SEC filing for 424B3 424B3 21 Feb 2025 333-283805
424B3 Open 424B3 document View SEC filing for 424B3 424B3 21 Feb 2025 333-283805
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K FEBRUARY 20, 2025 20 Feb 2025 20 Feb 2025 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 18 Feb 2025 11 Feb 2025 000-56269
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Feb 2025 31 Dec 2024 000-56269
EFFECT Open EFFECT document View SEC filing for EFFECT 11 Feb 2025 333-283805
CORRESP Open CORRESP document View SEC filing for CORRESP 07 Feb 2025
CORRESP Open CORRESP document View SEC filing for CORRESP 07 Feb 2025
S-1/A Open S-1/A document | Open XBRL data View SEC filing for S-1/A S-1/A 06 Feb 2025 333-283805
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 19 Dec 2024 333-283805
S-1 Open S-1 document | Open XBRL data View SEC filing for S-1 S-1 13 Dec 2024 333-283805
425 Open 425 document View SEC filing for 425 425 12 Dec 2024 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 12 Dec 2024 10 Dec 2024 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 19 Nov 2024 19 Nov 2024 000-56269
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Nov 2024 30 Sep 2024 000-56269
ARS Open ARS document View SEC filing for ARS ARS 11 Oct 2024 30 Jun 2024 000-56269
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 11 Oct 2024 19 Nov 2024 000-56269
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 26 Sep 2024 30 Jun 2024 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2024 16 May 2024
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2024 16 May 2024
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2024 28 Jun 2024
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2024 16 May 2024
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2024 16 May 2024
11-K Open 11-K document View SEC filing for 11-K MARATHON BANCORP, INC. FORM 11-K DECEMBER 31, 2023 18 Jun 2024 31 Dec 2023 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 28 May 2024 23 May 2024
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 May 2024 31 Mar 2024 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 07 Mar 2024 06 Mar 2024
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Feb 2024 31 Dec 2023 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K DECEMBER 22, 2023 26 Dec 2023 22 Dec 2023 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 05 Dec 2023 30 Nov 2023
4 Open 4 document View SEC filing for 4 FORM 4 05 Dec 2023 30 Nov 2023
4 Open 4 document View SEC filing for 4 FORM 4 05 Dec 2023 30 Nov 2023
4 Open 4 document View SEC filing for 4 FORM 4 05 Dec 2023 30 Nov 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K NOVEMBER 21, 2023 21 Nov 2023 21 Nov 2023 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 17 Nov 2023 16 Nov 2023
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Nov 2023 30 Sep 2023 000-56269
ARS Open ARS document View SEC filing for ARS ARS 17 Oct 2023 30 Jun 2023 000-56269
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 17 Oct 2023 21 Nov 2023 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 04 Oct 2023 28 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 04 Oct 2023 28 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 04 Oct 2023 28 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 04 Oct 2023 28 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 04 Oct 2023 28 Jun 2023
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 20 Sep 2023 30 Jun 2023 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K SEPTEMBER 19, 2023 20 Sep 2023 19 Sep 2023 000-56269
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 06 Jul 2023 16 May 2023
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 06 Jul 2023 16 May 2023
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 06 Jul 2023 16 May 2023
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 06 Jul 2023 16 May 2023
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 06 Jul 2023 16 May 2023
11-K Open 11-K document View SEC filing for 11-K MARATHON BANCORP, INC. FORM 11-K DECEMBER 31, 2022 28 Jun 2023 31 Dec 2022 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 13 Jun 2023 07 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 13 Jun 2023 07 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 13 Jun 2023 07 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 13 Jun 2023 07 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 22 May 2023 18 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 22 May 2023 18 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2023 16 May 2023
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 12 May 2023 31 Mar 2023 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K MAY 10, 2023 10 May 2023 10 May 2023 000-56269
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Feb 2023 31 Dec 2022 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2022 02 Dec 2022
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2022 02 Dec 2022
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2022 02 Dec 2022
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2022 02 Dec 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K NOVEMBER 22, 2022 22 Nov 2022 22 Nov 2022 000-56269
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 16 Nov 2022 16 Nov 2022 000-56269
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Nov 2022 30 Sep 2022 000-56269
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 17 Oct 2022 22 Nov 2022 000-56269
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Sep 2022 30 Jun 2022 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 08 Jul 2022 28 Jun 2022
3 Open 3 document View SEC filing for 3 FORM 3 08 Jul 2022 28 Jun 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K JUNE 28, 2022 30 Jun 2022 28 Jun 2022 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 29 Jun 2022 28 Jun 2022
11-K Open 11-K document View SEC filing for 11-K MARATHON BANCORP, INC. FORM 11-K DECEMBER 31, 2021 28 Jun 2022 31 Dec 2021 000-56269
S-8 Open S-8 document View SEC filing for S-8 MARATHON BANCORP, INC. FORM S-8 REGISTRATION STATEMENT JUNE 2022 28 Jun 2022 333-265879
4 Open 4 document View SEC filing for 4 FORM 4 01 Jun 2022 27 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 01 Jun 2022 27 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 01 Jun 2022 27 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 01 Jun 2022 27 May 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K MAY 24, 2022 24 May 2022 24 May 2022 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 18 May 2022 17 May 2022
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 May 2022 31 Mar 2022 000-56269
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 18 Apr 2022 24 May 2022 000-56269
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 11 Feb 2022 31 Dec 2021 000-56269
4 Open 4 document View SEC filing for 4 FORM 4 10 Dec 2021 08 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 10 Dec 2021 08 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 10 Dec 2021 08 Dec 2021
3/A Open 3/A document View SEC filing for 3/A FORM 3/A 10 Dec 2021 14 Apr 2021
3/A Open 3/A document View SEC filing for 3/A FORM 3/A 10 Dec 2021 14 Apr 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K NOVEMBER 23, 2021 23 Nov 2021 23 Nov 2021 000-56269
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 12 Nov 2021 30 Sep 2021 000-56269
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 22 Oct 2021 23 Nov 2021 000-56269
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Sep 2021 30 Jun 2021 000-56269
S-8 Open S-8 document View SEC filing for S-8 MARATHON BANCORP, INC. FORM S-8 JUNE 11, 2021 11 Jun 2021 333-257044
4 Open 4 document View SEC filing for 4 FORM 4 27 May 2021 26 May 2021
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 May 2021 31 Mar 2021 000-56269
8-K Open 8-K document View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K APRIL 14, 2021 19 Apr 2021 14 Apr 2021 000-56269
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 16 Apr 2021 16 Apr 2021 000-56269
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 15 Apr 2021 14 Apr 2021 000-56269
SC 13D Open SC 13D document View SEC filing for SC 13D MARATHON BANCORP, INC. SCHEDULE 13D 15 Apr 2021 005-92485
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
3 Open 3 document View SEC filing for 3 FORM 3 14 Apr 2021 14 Apr 2021
8-A12G Open 8-A12G document View SEC filing for 8-A12G MARATHON BANCORP, INC. 14 Apr 2021 000-56269
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 09 Apr 2021 09 Apr 2021 333-251314
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 30 Mar 2021 30 Mar 2021 333-251314
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 26 Mar 2021 31 Dec 2020 333-251314
8-K Open 8-K document View SEC filing for 8-K MARATHON BANCORP, INC. FORM 8-K MARCH 3, 2021 03 Mar 2021 03 Mar 2021 333-251314
424B3 Open 424B3 document View SEC filing for 424B3 424B3 22 Feb 2021 333-251314
424B3 Open 424B3 document View SEC filing for 424B3 424B3 22 Feb 2021 333-251314
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 17 Feb 2021 11 Feb 2021 333-251314
EFFECT Open EFFECT document View SEC filing for EFFECT 11 Feb 2021 333-251314
CORRESP Open CORRESP document View SEC filing for CORRESP 09 Feb 2021
CORRESP Open CORRESP document View SEC filing for CORRESP 09 Feb 2021
S-1/A Open S-1/A document View SEC filing for S-1/A S-1/A 29 Jan 2021 333-251314
CORRESP Open CORRESP document View SEC filing for CORRESP 28 Jan 2021
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 07 Jan 2021
S-1 Open S-1 document View SEC filing for S-1 FORM S-1 11 Dec 2020 333-251314

About this filer

Marathon Bancorp, Inc. /MD/ files with the SEC under CIK 0001835385. This page aggregates EDGAR filings and related ownership activity.

Industry: Savings Institutions, Not Federally Chartered.

See insider transactions for this issuer.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.

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