Marathon Bancorp, Inc. (MBBC) Ownership
MBBC ownership summary
as of October 18, 2026- Institutions
- 21.1% of shares outstanding
- Insiders
- 20.64% of shares outstanding
- Shares outstanding
- 3.0M
- Float
- 2.3M shares available to trade
- Short interest
- 0.26% 6,940 shares short
- Days to cover
- 1.72 short interest up 8.4% vs prior month
- Institutions 21.08%
- Insiders 20.64%
- Other investors 58.28%
MBBC top institutional holders
14 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Raffles Associates LP | 7.15% | 215K | $3.1M | +107,664 (+100.0%) | June 30, 2026 |
| 2 | AllianceBernstein L.P. | 5.09% | 153K | $2.2M | — | June 30, 2026 |
| 3 | Maltese Capital Management LLC | 4.83% | 145K | $2.1M | +198 (+0.1%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 2.53% | 76K | $1.1M | −571 (−0.7%) | June 30, 2026 |
| 5 | Minerva Advisors LLC | 1.85% | 56K | $808,375 | −3,226 (−5.5%) | June 30, 2026 |
| 6 | Kitzinger Lautmann Capital Mgmt Inc | 1.14% | 34K | $497,640 | — | June 30, 2026 |
| 7 | Stilwell Value LLC | 0.66% | 20K | $290,000 | — | June 30, 2026 |
| 8 | Vanguard Fiduciary Trust Co | 0.38% | 12K | $166,953 | −4,920 (−29.9%) | June 30, 2026 |
| 9 | Citadel Advisors Llc | 0.36% | 11K | $159,268 | +10,984 (0.0%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 0.36% | 11K | $157,630 | +10,871 (0.0%) | June 30, 2026 |
| 11 | BlackRock Inc | 0.28% | 8,357 | $121,176 | +8,357 (0.0%) | June 30, 2026 |
| 12 | UBS Group AG | <0.01% | 89 | $1,290 | +89 (0.0%) | June 30, 2026 |
| 13 | Tower Research Capital LLC | 0.00% | — | — | −226 (−100.0%) | June 30, 2026 |
| 14 | Bank of America Corp | 0.00% | — | — | −15 (−100.0%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 14, 6 holders added 138K shares and 5 cut 8,958.
MBBC top mutual fund and ETF holders
6 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 1.84% | 55K | $803,300 | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.27% | 8,036 | $116,522 | −43 (−0.5%) | August 31, 2026 |
| 3 | iShares Micro-Cap ETF | 0.25% | 7,556 | $109,562 | −52 (−0.7%) | September 30, 2026 |
| 4 | Fidelity Series Total Market Index | 0.07% | 1,970 | $28,565 | — | August 31, 2026 |
| 5 | Vanguard Balanced Index Inv | 0.06% | 1,687 | $24,462 | — | August 31, 2026 |
| 6 | 1290 VT Micro Cap K | 0.02% | 460 | $6,670 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
MBBC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns MBBC
Institutional investors own 21.1% of Marathon Bancorp's shares and insiders 20.64%. The largest holder is Raffles Associates LP with 7.15% of the shares (215K), as of June 30, 2026. Among the top 14 institutions, 6 added shares and 5 reduced their stake in the latest filings. Short interest is 0.26% of the float, or 1.72 days of average trading volume. The share count rose 66.2% since 2019.
Related: MBBC key metrics. See the MBBC stock overview for the latest quote and news.
MBBC ownership FAQ
Who owns the most Marathon Bancorp stock?
The largest shareholders of Marathon Bancorp are Raffles Associates LP (7.15%), AllianceBernstein L.P. (5.09%), Maltese Capital Management LLC (4.83%), Vanguard Capital Management, LLC (2.53%), Minerva Advisors LLC (1.85%).
What percentage of Marathon Bancorp is owned by institutions?
Institutions hold 21.1% of Marathon Bancorp's shares outstanding; insiders hold 20.64%.
Which funds own Marathon Bancorp?
The largest fund holders of Marathon Bancorp are Vanguard MStar Total Stk Mkt Idx Invest (1.84%), Fidelity Extended Market Index (0.27%), iShares Micro-Cap ETF (0.25%), Fidelity Series Total Market Index (0.07%), Vanguard Balanced Index Inv (0.06%).
What is Marathon Bancorp's short interest?
6,940 shares of Marathon Bancorp were sold short, 0.26% of the float; at the average daily volume it would take 1.72 days to cover.
How many shares of Marathon Bancorp are outstanding?
Marathon Bancorp has 3.0M shares outstanding, of which 2.3M are in the public float.