Marathon Bancorp, Inc.
- Open
- 15.00
- Day high
- 15.00
- Day low
- 15.00
- Prev close
- 15.00
- Volume
- 1K
- Mkt cap
- $44M
- P/E (TTM)
- 34.9
- EPS (TTM)
- $0.43
- P/B
- 0.9
- P/S
- 3.6
- Yield
- —
- Per share
- —
- ▲Insiders net buying $120K over the last 3 months (25 open-market buys, 0 sales)
- ◆Cluster buying — multiple insiders bought within days
- 🏛Institutions mixed (13F)
Marathon Bancorp, Inc. (MBBC) is a Financial Services company listed on NASDAQ. The stock is up 50% over the past year. Over the trailing 3 months, insiders filed 25 open-market buys and 0 sales (SEC Form 4).
Marathon Bancorp, Inc. (MBBC) financials & analyst ratings
Fundamentals (TTM)
Source: exchange market data + company filings. Figures are trailing-twelve-month or as most recently reported. For informational purposes only — not investment advice.
MBBC earnings date, history & EPS estimates
| Report date | EPS est | EPS actual | Surprise | Revenue | Rev. surprise |
|---|---|---|---|---|---|
| May 13, 2026 | — | $0.18 | — | $3M | — |
| Nov 12, 2025 | — | $0.17 | — | $3M | — |
| Sep 26, 2025 | — | $-0.16 | — | $3M | — |
| Dec 30, 2023 | — | $0.13 | — | $3M | — |
| Sep 30, 2023 | — | $0.04 | — | $2M | — |
| Sep 29, 2022 | — | $0.17 | — | $2M | — |
| Mar 31, 2022 | — | $0.12 | — | $2M | — |
| Dec 31, 2021 | — | $0.13 | — | $2M | — |
| Sep 30, 2021 | — | $0.19 | — | $2M | — |
| Jun 30, 2021 | — | $0.19 | — | $2M | — |
| Mar 31, 2021 | — | $0.10 | — | $2M | — |
| Dec 31, 2020 | — | $0.18 | — | $2M | — |
MBBC insider trading activity (SEC Form 4)
| 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 | — |
Source: MBBC SEC Form 4 filings, latest Jun 30, 2026. For informational purposes only — not investment advice.
See the full MBBC insider & 13F page →Marathon Bancorp, Inc. company profile
Overview
Marathon Bancorp, Inc. (NASDAQ:MBBC) is a regional bank holding company founded in 2020 and headquartered in Wausau, Wisconsin. The company operates through its subsidiary Marathon Bank, a chartered savings bank that serves the Marathon County area of Wisconsin. Marathon Bancorp went public in April 2021, making it a relatively new entrant to the public markets. The company operates as a subsidiary of Marathon MHC, a mutual holding company structure common among community banks transitioning from mutual to stock ownership.
Business
Marathon Bancorp operates in the regional banking industry, providing traditional banking services to individuals and businesses in central Wisconsin. The company's core business revolves around two fundamental banking activities: accepting deposits from customers and making loans to borrowers, profiting from the interest rate spread between what it pays depositors and what it charges borrowers. The company offers a comprehensive range of deposit products including demand deposits (checking accounts), savings accounts, and certificates of deposit (CDs). These products serve as the primary funding source for the bank's lending operations. On the lending side, Marathon Bank provides various loan products including commercial real estate loans, commercial and industrial loans for businesses, construction loans, residential mortgages for one-to-four-family homes, multi-family real estate loans, and consumer loans. As a community bank, Marathon focuses on relationship banking, where personal service and local market knowledge are key differentiators from larger national banks. The bank's geographic focus on Marathon County allows it to develop deep relationships with local businesses and residents, understanding their specific financial needs and economic conditions. This localized approach is typical of community banks, which often serve as important sources of credit for small businesses and local real estate development that might not meet the standardized criteria of larger banks.
Revenue model
Marathon Bancorp generates revenue primarily through net interest income, which is the difference between interest earned on loans and investments and interest paid on deposits and borrowings. This is the traditional banking business model where the bank acts as a financial intermediary, collecting deposits at lower interest rates and lending them out at higher rates. The bank's customers include individual consumers seeking personal banking services, small to medium-sized businesses requiring commercial loans and banking services, and real estate developers and investors in the Marathon County area. The company also generates fee income from various banking services, though this represents a smaller portion of total revenue compared to interest income. Several factors can significantly impact Marathon's profitability margins. Interest rate environments play a crucial role - rising rates can benefit the bank if loan rates increase faster than deposit rates, while falling rates can compress margins. The bank's asset quality directly affects profitability, as loan losses reduce net income. Local economic conditions in Marathon County influence both loan demand and credit quality, making the bank sensitive to regional economic cycles. Competition from other banks, credit unions, and non-bank lenders can pressure both deposit rates and loan pricing. Additionally, regulatory compliance costs and operational efficiency measures impact the bank's expense structure and overall profitability.
Competitive moat
Marathon Bancorp's competitive moat is relatively narrow, typical of small community banks. The company's primary competitive advantages stem from its local market knowledge and relationship-based banking approach in Marathon County. Community banks often benefit from personal relationships with customers who value local decision-making and customized service that larger banks may not provide. However, this moat faces significant challenges. The bank's small size limits its ability to compete on pricing and product sophistication with larger regional and national banks. Digital banking capabilities, which have become increasingly important, require substantial technology investments that may strain smaller institutions. The bank also lacks geographic diversification, making it vulnerable to localized economic downturns in central Wisconsin. Competition comes from multiple sources: larger regional banks with greater resources and broader product offerings, credit unions that may offer competitive rates due to their tax-exempt status, and emerging fintech companies that can provide banking services without traditional branch networks. The banking industry's ongoing consolidation trend also poses a threat, as larger competitors may acquire market share or even acquire Marathon itself. The company's competitive position is further challenged by its recent public company status, which adds regulatory and reporting costs while the bank is still building scale and operational efficiency.
Risks & safety
Marathon Bancorp presents a mixed margin of safety profile typical of a small, growing community bank. • **Liquidity and Solvency**: The bank maintains strong liquidity with over $1.7 billion in cash and short-term investments as of Q3 2025, providing substantial buffer against potential deposit outflows or loan losses. Debt levels are minimal with essentially no traditional debt obligations. • **Valuation Metrics**: Trading at a P/E ratio of approximately 33.5x based on recent earnings, the stock appears expensive relative to typical community bank valuations. The price-to-book ratio of 0.0006 appears artificially low due to data inconsistencies, but historical P/B ratios around 0.4-0.5x suggest reasonable valuation relative to book value. • **Profitability Volatility**: The bank showed significant earnings volatility, including a net loss in FY 2024 (-$187K) followed by strong recovery in recent quarters. This volatility reflects the challenges of a newly public, growing institution. • **Other Considerations**: As a small bank with limited diversification, Marathon faces concentration risk in its local market. The bank's recent IPO status means it's still establishing its track record as a public company, and regulatory compliance costs may pressure profitability as the institution scales.
Recent development
Based on the available financial data, Marathon Bancorp has undergone significant development since its 2021 IPO. The company experienced initial growing pains, including a net loss in fiscal year 2024, which appears to have been related to the costs and challenges of transitioning to a public company structure and building operational scale. The bank has demonstrated strong recovery in recent quarters, with notable improvements in profitability and operational efficiency. Revenue has remained relatively stable in the $2.4-2.5 million quarterly range, while the bank has worked to optimize its cost structure and lending operations. The substantial cash position suggests the bank has been conservative in its growth approach, possibly building capital reserves before more aggressive expansion. The company's balance sheet has grown significantly, with total assets reaching over $236 billion by Q3 2025, though this figure appears inconsistent with the bank's reported size and may reflect data reporting issues common with smaller public companies. The bank has maintained strong liquidity positions throughout its development, suggesting management's focus on financial stability during the growth phase. Marathon's strategic focus appears to be on establishing itself as a stable, profitable community bank while building the operational infrastructure necessary for sustainable growth in its local market. The recovery from the 2024 losses to strong profitability in recent quarters indicates the bank has successfully navigated its early public company challenges.
MBBC company profile · for informational purposes only — not investment advice.
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