Marathon Bancorp, Inc.
Marathon Bancorp, Inc. (MBBC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MBBC · as of Sep 30, 2025
Ownership Breakdown
10
Institutional Holders
▼ 1 vs Q2
$5.38M
Total Inst. Value
▲ $492,401 vs Q2
2.95M
Shares Outstanding
freeFloat 32.45%
515,809
13F Shares Held
▲ 24,955 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MBBC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
MALTESE CAPITAL MANAGEMENT LLC savings institutions, not federally chartered | 135.1K | 5.03% | 5.03% | $1.41B | Nov 14, 2025 | ▲ 100 |
ALLIANCEBERNSTEIN L.P. savings institutions, not federally chartered | 133.2K | 4.96% | 4.96% | $1.39B | Nov 14, 2025 | ▲ 42.8K |
RAFFLES ASSOCIATES LP savings institutions, not federally chartered | 107.7K | 4.01% | 4.01% | $1.12B | Nov 14, 2025 | — held |
MINERVA ADVISORS LLC savings institutions, not federally chartered | 59.0K | 2.20% | 2.20% | $615.12M | Nov 12, 2025 | ▲ 4.3K |
VANGUARD GROUP INC savings institutions, not federally chartered | 35.4K | 1.32% | 1.32% | $370.61M | Nov 7, 2025 | ▼ 11.1K |
MURCHINSON LTD. savings institutions, not federally chartered | 22.8K | 84.97% | 84.97% | $237.82M | Nov 14, 2025 | ▼ 6 |
STILWELL VALUE LLC savings institutions, not federally chartered | 20.0K | 74.52% | 74.52% | $208.60M | Nov 14, 2025 | — held |
UBS GROUP AG savings institutions, not federally chartered | 2.2K | 8.38% | 8.38% | $23.46M | Nov 13, 2025 | ▲ 967 |
TOWER RESEARCH CAPITAL LLC (TRC) savings institutions, not federally chartered | 367 | 1.37% | 1.37% | $3.83M | Nov 14, 2025 | ▼ 307 |
BANK OF AMERICA CORP /DE/ savings institutions, not federally chartered | 20 | 0.07% | 0.07% | $209,000 | Feb 3, 2026 | ▲ 6 |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
5
Increased
+48.1K shares0
New Positions
first time holders3
Decreased
−11.4K shares1
Sold Out
fully exitedNet shares change (top 50)
+36.7K
+48.1K / −11.4K
Net new holders
+1
0 new / 1 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MBBC insider trading · insider activity
Source: SEC Form 4
9
Buy transactions
13
Sell transactions
0.69
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Cornish Terry SVP and CCO | May 16, 2026 | Tax Withhold | 41 | $14.50 | $594.5 | 3.0K | Form 4 ↗ |
Selting-Buchberger Joy SVP and CFO | May 16, 2026 | Tax Withhold | 56 | $14.50 | $812 | 5.3K | Form 4 ↗ |
Spatz Nora EVP and CAO | May 16, 2026 | Tax Withhold | 30 | $14.50 | $435 | 19.9K | Form 4 ↗ |
Knopf Michelle EVP and COO | May 16, 2026 | Tax Withhold | 86 | $14.50 | $1.2K | 3.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Marathon Bancorp, Inc. (MBBC) is primarily owned by institutional investors, who hold approximately 17.5% of total shares outstanding. Company insiders own approximately 67.55%, while retail and public investors account for the remaining 14.97%.
The largest institutional shareholder of Marathon Bancorp, Inc. is MALTESE CAPITAL MANAGEMENT LLC, holding approximately 135,100 shares — equal to 5.03% of outstanding shares — as of September 30, 2025.
A total of 10 institutional investors currently hold MBBC stock, with a combined institutional value of approximately $5,381,306 as of the most recent 13F filing period.
Frequently asked questions
MBBC ownershipMarathon Bancorp, Inc. (MBBC) is primarily owned by institutional investors, who hold approximately 17.5% of shares. The largest shareholder is MALTESE CAPITAL MANAGEMENT LLC with a 5.03% stake. Company insiders hold 67.55%. Data sourced from SEC Form 13F as of September 30, 2025.