{
  "name": "Marathon Bancorp, Inc.",
  "legal_name": "Marathon Bancorp, Inc. /MD/",
  "ticker": "MBBC",
  "tickers": [
    "MBBC"
  ],
  "cik": "0001835385",
  "page_url": "https://steadybase.io/company/marathon-bancorp-inc/",
  "markdown_url": "https://steadybase.io/company/marathon-bancorp-inc.md",
  "json_url": "https://steadybase.io/company/marathon-bancorp-inc.json",
  "as_of": "2026-11-10",
  "last_filed": "2026-10-13",
  "industry": {
    "sic": "6036",
    "description": "Savings Institutions, Not Federally Chartered"
  },
  "headquarters": {
    "city": "Wausau",
    "state": "WI",
    "country": "US"
  },
  "exchanges": [
    "Nasdaq"
  ],
  "fiscal_year_end": "June 30",
  "filer_category": "Non-accelerated filer<br>Smaller reporting company",
  "state_of_incorporation": null,
  "website": "marathonbank.com",
  "investor_relations_url": "https://marathonbancorp.com/investor-relations/",
  "linkedin_company_url": "https://www.linkedin.com/company/marathon-savings-bank",
  "summary": {
    "text": "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.",
    "section": "Item 1. Business",
    "period_end": "2026-06-30",
    "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/mara-20260630x10k.htm"
  },
  "key_facts": [
    {
      "key": "revenue",
      "label": "Revenue",
      "value": 11901362,
      "unit": "USD",
      "period_start": "2025-07-01",
      "period_end": "2026-06-30",
      "basis": "filing_fact",
      "form": "10-K",
      "filed": "2026-09-16",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/0001104659-26-108076-index.html",
      "text": "Revenue: $11.9M for the fiscal year ended Jun 30, 2026 (10-K filed Sep 16, 2026)."
    },
    {
      "key": "net_income",
      "label": "Net income",
      "value": 1791171,
      "unit": "USD",
      "period_start": "2025-07-01",
      "period_end": "2026-06-30",
      "basis": "filing_fact",
      "form": "10-K",
      "filed": "2026-09-16",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/0001104659-26-108076-index.html",
      "text": "Net income: $1.8M for the fiscal year ended Jun 30, 2026 (10-K filed Sep 16, 2026)."
    },
    {
      "key": "employees",
      "label": "Employees",
      "value": 31,
      "unit": "people",
      "period_end": "2026-06-30",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/mara-20260630x10k.htm",
      "text": "Employees: 31 as of Jun 30, 2026, as reported in an SEC filing."
    },
    {
      "key": "shares_outstanding",
      "label": "Shares outstanding",
      "value": 3009903,
      "unit": "shares",
      "period_end": "2026-09-15",
      "form": "10-K",
      "filed": "2026-09-16",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/0001104659-26-108076-index.html",
      "text": "Shares outstanding: 3,009,903 as of Sep 15, 2026 (10-K filed Sep 16, 2026)."
    },
    {
      "key": "auditor",
      "label": "Auditor",
      "value": "Bonadio & Co., LLP",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/mara-20260630x10k.htm",
      "text": "Auditor: Bonadio & Co., LLP, Pittsford, New York, named in the latest 10-K."
    }
  ],
  "metrics": {
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        "filed": "2024-09-26",
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    ],
    "net_income": [
      {
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        "period_end": "2026-06-30",
        "value": 1791171,
        "unit": "USD",
        "basis": "filing_fact",
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        "filed": "2026-09-16",
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      {
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        "value": 1334763,
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    ]
  },
  "next_earnings": {
    "date": "2026-11-12",
    "confidence": "estimate",
    "webcast_url": null
  },
  "people": [
    {
      "name": "Nicholas W. Zillges",
      "title": "President and CEO",
      "role": "both",
      "linkedin_url": "https://linkedin.com/in/nicholas-zillges-985a2014",
      "form": "4",
      "filed": "2026-06-30",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926022173/0001437749-26-022173-index.htm"
    },
    {
      "name": "Joy Selting-Buchberger",
      "title": "SVP and CFO",
      "role": "officer",
      "linkedin_url": null,
      "form": "4",
      "filed": "2026-06-30",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926022169/0001437749-26-022169-index.htm"
    },
    {
      "name": "Michelle Knopf",
      "title": "EVP and COO",
      "role": "officer",
      "linkedin_url": "https://linkedin.com/in/michelle-knopf-b9941143",
      "form": "4",
      "filed": "2026-06-30",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926022176/0001437749-26-022176-index.htm"
    },
    {
      "name": "Nora Spatz",
      "title": "EVP and CAO",
      "role": "officer",
      "linkedin_url": null,
      "form": "4",
      "filed": "2026-09-18",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926030752/0001437749-26-030752-index.htm"
    },
    {
      "name": "Terry Cornish",
      "title": "SVP and CCO",
      "role": "officer",
      "linkedin_url": "https://linkedin.com/in/terry-cornish-27a13236",
      "form": "4",
      "filed": "2026-06-30",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926022178/0001437749-26-022178-index.htm"
    }
  ],
  "events_8k": [
    {
      "filed": "2026-10-01",
      "items": [
        {
          "item": "5.02",
          "label": "Departure or appointment of directors or officers; compensation",
          "signal": "leadership_change"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337426000436/mbbc-20260930.htm"
    },
    {
      "filed": "2026-05-28",
      "items": [
        {
          "item": "5.02",
          "label": "Departure or appointment of directors or officers; compensation",
          "signal": "leadership_change"
        },
        {
          "item": "5.07",
          "label": "Submission of matters to a vote of security holders",
          "signal": "governance"
        },
        {
          "item": "9.01",
          "label": "Financial statements and exhibits",
          "signal": "exhibits"
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      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337426000217/form8k_052826.htm"
    },
    {
      "filed": "2026-04-24",
      "items": [
        {
          "item": "8.01",
          "label": "Other events",
          "signal": "other"
        },
        {
          "item": "9.01",
          "label": "Financial statements and exhibits",
          "signal": "exhibits"
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      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337426000167/form8k_042426.htm"
    },
    {
      "filed": "2025-11-18",
      "items": [
        {
          "item": "5.07",
          "label": "Submission of matters to a vote of security holders",
          "signal": "governance"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337425000479/form8k.htm"
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    {
      "filed": "2025-04-21",
      "items": [
        {
          "item": "8.01",
          "label": "Other events",
          "signal": "other"
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          "item": "9.01",
          "label": "Financial statements and exhibits",
          "signal": "exhibits"
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        {
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          "signal": "exhibits"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337425000155/form8k_041425.htm"
    },
    {
      "filed": "2025-03-31",
      "items": [
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          "signal": "governance"
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        {
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      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337425000141/form8k_033125.htm"
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      "items": [
        {
          "item": "8.01",
          "label": "Other events",
          "signal": "other"
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        {
          "item": "9.01",
          "label": "Financial statements and exhibits",
          "signal": "exhibits"
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      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337425000139/form8k_032425.htm"
    },
    {
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      "items": [
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          "label": "Other events",
          "signal": "other"
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        {
          "item": "9.01",
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      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337425000109/form8k_022025.htm"
    },
    {
      "filed": "2025-02-18",
      "items": [
        {
          "item": "1.01",
          "label": "Entry into a material definitive agreement",
          "signal": "deal"
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        {
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      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465925014749/tm256880d1_8k.htm"
    }
  ],
  "insider_trades": [
    {
      "owner": "Nicholas W. Zillges",
      "role": "President and CEO",
      "action": "bought",
      "code": "P",
      "shares": 970,
      "value_usd": 14550,
      "date": "2026-06-16",
      "filed": "2026-06-17",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926020909/0001437749-26-020909-index.htm"
    },
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    },
    {
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      "action": "bought",
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      "date": "2026-06-10",
      "filed": "2026-06-11",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926020348/0001437749-26-020348-index.htm"
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    {
      "owner": "Nicholas W. Zillges",
      "role": "President and CEO",
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      "shares": 1076,
      "value_usd": 15440,
      "date": "2026-06-10",
      "filed": "2026-06-11",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926020346/0001437749-26-020346-index.htm"
    },
    {
      "owner": "Nora Spatz",
      "role": "EVP and CAO",
      "action": "bought",
      "code": "P",
      "shares": 3819,
      "value_usd": 54799,
      "date": "2026-06-10",
      "filed": "2026-06-11",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774926020344/0001437749-26-020344-index.htm"
    },
    {
      "owner": "Nicholas W. Zillges",
      "role": "President and CEO",
      "action": "bought",
      "code": "P",
      "shares": 1075,
      "value_usd": 12223,
      "date": "2025-11-26",
      "filed": "2025-11-28",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465925116835/0001104659-25-116835-index.htm"
    },
    {
      "owner": "Nicholas W. Zillges",
      "role": "President and CEO",
      "action": "bought",
      "code": "P",
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      "date": "2025-11-13",
      "filed": "2025-11-14",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000143774925035072/0001437749-25-035072-index.htm"
    }
  ],
  "quotes": [],
  "latest_filings": [
    {
      "form": "8-K",
      "filed": "2026-10-01",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000094337426000436/mbbc-20260930.htm"
    },
    {
      "form": "10-K",
      "filed": "2026-09-16",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926108076/mara-20260630x10k.htm"
    },
    {
      "form": "10-Q",
      "filed": "2026-05-13",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926059789/mara-20260331x10q.htm"
    },
    {
      "form": "DEF 14A",
      "filed": "2026-10-13",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1835385/000110465926115479/tm2528237d1_def14a.htm"
    }
  ],
  "source": "SEC EDGAR filings, read by Steadybase. Every value links to the filing it came from."
}