MBBC · Marathon Bancorp, Inc. /MD/ · Holdings
Market Cap
$45.99M
Shares
3.01M
Volume · Oct 5
5599
Avg daily vol (3M)
2920
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
Holders: 12
Total Value: $9,689,222
Total Shares: 634,112
Institutional Ownership Trend
12 quarters
Holder Concentration
Across 12 13F filers · Δ vs Mar 31, 2026Top Holder
24.2%
−0.9 pts
Top 5
84.8%
−3.6 pts
Top 10
98.7%
−1.3 pts
HHI
1,669
Moderately concentrated−126
Quarterly Activity
vs Mar 31, 2026
New
4
Increased
1
Decreased
3
Sold Out
1
Unchanged
4
Holder count:
+3
Institutional value:
+16.9%
Shares held:
+3.5%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Small MALTESE CAPITAL MANAGEMENT LLC | +198 | 145,298 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega VANGUARD FIDUCIARY TRUST CO | −4,920 | 11,514 | |
| Small Minerva Advisors LLC | −3,226 | 55,750 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | −571 | 76,027 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega CITADEL ADVISORS LLC | 10,984 | $167,835 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | 10,871 | $166,107 | |
| Mega BlackRock, Inc. | 8,357 | $127,694 | |
| Mega UBS Group AG | 89 | $1,359 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mid Tower Research Capital LLC (TRC) | 226 | $3,057 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega ALLIANCEBERNSTEIN L.P. | $2,341,476 | 24.17% | 153,238 | Shares | 2026-08-14 | |
| Small MALTESE CAPITAL MANAGEMENT LLC | $2,220,152 | 22.91% | 145,298 | Shares | 2026-08-14 | |
| Small RAFFLES ASSOCIATES LP | $1,645,105 | 16.98% | 107,664 | Shares | 2026-08-17 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $1,161,692 | 11.99% | 76,027 | Shares | 2026-08-13 | |
| Small Minerva Advisors LLC | $851,860 | 8.79% | 55,750 | Shares | 2026-08-12 | |
| Mid KLCM Advisors, Inc. | $524,409 | 5.41% | 34,320 | Shares | 2026-08-06 | |
| Micro STILWELL VALUE LLC | $305,600 | 3.15% | 20,000 | Shares | 2026-08-07 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $175,933 | 1.82% | 11,514 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC | $167,835 | 1.73% | 10,984 | Shares | 2026-09-02 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $166,107 | 1.71% | 10,871 | Shares | 2026-08-12 | |
| Mega BlackRock, Inc. | $127,694 | 1.32% | 8,357 | Shares | 2026-08-07 | |
| Mega UBS Group AG | $1,359 | 0.01% | 89 | Shares | 2026-08-13 |