# Marathon Bancorp, Inc. (MBBC)

> Cited company facts from SEC filings, by Steadybase. Web page: https://steadybase.io/company/marathon-bancorp-inc/ JSON: https://steadybase.io/company/marathon-bancorp-inc.json Checked Nov 10, 2026. Latest filing read: Oct 13, 2026.

## Company

- Legal name: Marathon Bancorp, Inc. /MD/
- Ticker: MBBC (Nasdaq)
- SEC CIK: 0001835385
- Industry: Savings Institutions, Not Federally Chartered (SIC 6036)
- Headquarters: Wausau, WI
- Fiscal year ends: June 30
- SEC filer category: Non-accelerated filer<br>Smaller reporting company
- Website: marathonbank.com
- Investor relations: https://marathonbancorp.com/investor-relations/
- LinkedIn: https://www.linkedin.com/company/marathon-savings-bank
- Next earnings date: Nov 12, 2026 (estimated from past 8-K timing)

## Key facts

- Revenue: $11.9M for the fiscal year ended Jun 30, 2026 (10-K filed Sep 16, 2026). Source: https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/0001104659-26-108076-index.html
- Net income: $1.8M for the fiscal year ended Jun 30, 2026 (10-K filed Sep 16, 2026). Source: https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/0001104659-26-108076-index.html
- Employees: 31 as of Jun 30, 2026, as reported in an SEC filing. Source: https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/mara-20260630x10k.htm
- Shares outstanding: 3,009,903 as of Sep 15, 2026 (10-K filed Sep 16, 2026). Source: https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/0001104659-26-108076-index.html
- Auditor: Bonadio & Co., LLP, Pittsford, New York, named in the latest 10-K. Source: https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/mara-20260630x10k.htm

## Business

Marathon Bancorp, Inc. (the “Company” or “Marathon Bancorp”), a Maryland corporation, was formed in December 2020 to serve as the mid-tier holding company for Marathon Bank (the “Bank”) upon the completion of the Bank’s mutual holding company reorganization and offering.

Source: Item 1. Business, https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/mara-20260630x10k.htm

## Annual results

| Fiscal year ended | Revenue | Net income |
|---|---|---|
| Jun 30, 2026 | $11.9M | $1.8M |
| Jun 30, 2025 | $9.6M | $42,445 |
| Jun 30, 2024 | $9.4M | -$186,994 |
| Jun 30, 2023 | $9.0M | $1.7M |
| Jun 30, 2022 | $7.2M | $1.3M |

Each figure comes from the annual report for that year. Filing links for every figure: https://steadybase.io/company/marathon-bancorp-inc.json

## Officers and directors

- Nicholas W. Zillges, President and CEO. LinkedIn: https://linkedin.com/in/nicholas-zillges-985a2014. Source: Form 4 filed Jun 30, 2026, https://www.sec.gov/Archives/edgar/data/1835385/000143774926022173/0001437749-26-022173-index.htm
- Joy Selting-Buchberger, SVP and CFO. Source: Form 4 filed Jun 30, 2026, https://www.sec.gov/Archives/edgar/data/1835385/000143774926022169/0001437749-26-022169-index.htm
- Michelle Knopf, EVP and COO. LinkedIn: https://linkedin.com/in/michelle-knopf-b9941143. Source: Form 4 filed Jun 30, 2026, https://www.sec.gov/Archives/edgar/data/1835385/000143774926022176/0001437749-26-022176-index.htm
- Nora Spatz, EVP and CAO. Source: Form 4 filed Sep 18, 2026, https://www.sec.gov/Archives/edgar/data/1835385/000143774926030752/0001437749-26-030752-index.htm
- Terry Cornish, SVP and CCO. LinkedIn: https://linkedin.com/in/terry-cornish-27a13236. Source: Form 4 filed Jun 30, 2026, https://www.sec.gov/Archives/edgar/data/1835385/000143774926022178/0001437749-26-022178-index.htm

## Recent 8-K events

- Oct 1, 2026: Item 5.02, Departure or appointment of directors or officers; compensation. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337426000436/mbbc-20260930.htm
- May 28, 2026: Item 5.02, Departure or appointment of directors or officers; compensation; Item 5.07, Submission of matters to a vote of security holders; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337426000217/form8k_052826.htm
- Apr 24, 2026: Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337426000167/form8k_042426.htm
- Nov 18, 2025: Item 5.07, Submission of matters to a vote of security holders. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000479/form8k.htm
- Apr 21, 2025: Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000161/form8k.htm
- Apr 16, 2025: Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000155/form8k_041425.htm
- Mar 31, 2025: Item 5.07, Submission of matters to a vote of security holders; Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000141/form8k_033125.htm
- Mar 24, 2025: Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000139/form8k_032425.htm
- Feb 20, 2025: Item 8.01, Other events; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000109/form8k_022025.htm
- Feb 18, 2025: Item 1.01, Entry into a material definitive agreement; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1835385/000110465925014749/tm256880d1_8k.htm

## Insider trades (Form 4)

- Jun 16, 2026: Nicholas W. Zillges (President and CEO) bought 970 shares, about $14,550. Source: https://www.sec.gov/Archives/edgar/data/1835385/000143774926020909/0001437749-26-020909-index.htm
- Jun 10, 2026: Terry Cornish (SVP and CCO) bought 1,389 shares, about $19,931. Source: https://www.sec.gov/Archives/edgar/data/1835385/000143774926020350/0001437749-26-020350-index.htm
- Jun 10, 2026: Michelle Knopf (EVP and COO) bought 1,041 shares, about $14,937. Source: https://www.sec.gov/Archives/edgar/data/1835385/000143774926020348/0001437749-26-020348-index.htm
- Jun 10, 2026: Nicholas W. Zillges (President and CEO) bought 1,076 shares, about $15,440. Source: https://www.sec.gov/Archives/edgar/data/1835385/000143774926020346/0001437749-26-020346-index.htm
- Jun 10, 2026: Nora Spatz (EVP and CAO) bought 3,819 shares, about $54,799. Source: https://www.sec.gov/Archives/edgar/data/1835385/000143774926020344/0001437749-26-020344-index.htm
- Nov 26, 2025: Nicholas W. Zillges (President and CEO) bought 1,075 shares, about $12,223. Source: https://www.sec.gov/Archives/edgar/data/1835385/000110465925116835/0001104659-25-116835-index.htm
- Nov 13, 2025: Nicholas W. Zillges (President and CEO) bought 1,325 shares, about $14,575. Source: https://www.sec.gov/Archives/edgar/data/1835385/000143774925035072/0001437749-25-035072-index.htm

## Latest filings

- 8-K filed Oct 1, 2026: https://www.sec.gov/Archives/edgar/data/1835385/000094337426000436/mbbc-20260930.htm
- 10-K filed Sep 16, 2026: https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/mara-20260630x10k.htm
- 10-Q filed May 13, 2026: https://www.sec.gov/Archives/edgar/data/1835385/000110465926059789/mara-20260331x10q.htm
- DEF 14A filed Oct 13, 2026: https://www.sec.gov/Archives/edgar/data/1835385/000110465926115479/tm2528237d1_def14a.htm

## About this data

SEC EDGAR filings, read by Steadybase. Every value links to the filing it came from.
Steadybase covers US-headquartered public companies that file with the SEC. API and MCP access: https://steadybase.io/docs/