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MBBC · Marathon Bancorp, Inc. /Md/
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MBBC Marathon Bancorp (MBBC) Insider Trading, Ownership & Congress Trades

Banks · Savings institutions, not federally chartered · CIK 0001835385
Quote by TradingView
Cluster · 4 insidersC-suite buying · 4
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
6
13F, latest reported quarter
Conversions, 180 days
11
Codes C/M, not in net · $118.8K priced

What the filings say about MBBC

Insiders, 180 days
+$119.7K net bought
4 buyers

Marathon Bancorp insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

Over the last 180 days, Marathon Bancorp, Inc. /MD/ insiders bought a net $119.7K of stock across 37 Form 4 purchases and sales, with 4 insiders buying. Source: SEC Form 4 filings, as of 2026-10-27.

Insider
Filed
Shares
Value
Since filing
Zillges Nicholas W
President and CEO
BUY
2026-06-17 SECtraded 2026-06-16
970
$14.6K
-4.2%
Context
  • 17 earlier Form 4 trades (code P or S) here by this insider (17 buys), the last on Jun 10, 2026.
  • +6.2% median (+8.0% mean) 90-day return after 14 previous buys.
  • The trade is 1.7% of the 57,205 shares held after it.
  • 3 other insiders bought within 30 days.
  • 6 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: President and CEO Zillges Nicholas W bought about $14.6K of MBBC on Jun 16, 2026; 3 other insiders bought within 30 days and 6 funds added in the latest 13F quarter.
Cornish Terry
SVP and CCO
BUY
2026-06-11 SECtraded 2026-06-10
219
$3.2K
+2.7%
Context
  • 5 earlier Form 4 trades (code P or S) here by this insider (5 buys), the last on Jun 9, 2026.
  • +6.2% median (+6.3% mean) 90-day return after 5 previous buys.
  • The trade is 0.8% of the 27,205 shares held after it.
  • 3 other insiders bought within 30 days.
  • 6 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: SVP and CCO Cornish Terry bought about $3.2K of MBBC on Jun 10, 2026; 3 other insiders bought within 30 days and 6 funds added in the latest 13F quarter.
Knopf Michelle
EVP and COO
BUY
2026-06-11 SECtraded 2026-06-10
164
$2.4K
+2.7%
Context
  • 5 earlier Form 4 trades (code P or S) here by this insider (5 buys), the last on Jun 9, 2026.
  • +6.2% median (+6.3% mean) 90-day return after 5 previous buys.
  • The trade is 0.8% of the 19,339 shares held after it.
  • 3 other insiders bought within 30 days.
  • 6 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: EVP and COO Knopf Michelle bought about $2.4K of MBBC on Jun 10, 2026; 3 other insiders bought within 30 days and 6 funds added in the latest 13F quarter.
Zillges Nicholas W
President and CEO
BUY
2026-06-11 SECtraded 2026-06-10
170
$2.5K
+2.7%
Context
  • 16 earlier Form 4 trades (code P or S) here by this insider (16 buys), the last on Jun 9, 2026.
  • +6.2% median (+8.0% mean) 90-day return after 13 previous buys.
  • The trade is 0.3% of the 51,160 shares held after it.
  • 3 other insiders bought within 30 days.
  • 6 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: President and CEO Zillges Nicholas W bought about $2.5K of MBBC on Jun 10, 2026; 3 other insiders bought within 30 days and 6 funds added in the latest 13F quarter.
Spatz Nora
EVP and CAO
BUY
2026-06-11 SECtraded 2026-06-10
602
$8.9K
+2.7%
Context
  • 6 earlier Form 4 trades (code P or S) here by this insider (6 buys), the last on Jun 9, 2026.
  • +6.2% median (+6.5% mean) 90-day return after 6 previous buys.
  • The trade is 1.5% of the 39,520 shares held after it.
  • 3 other insiders bought within 30 days.
  • 6 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: EVP and CAO Spatz Nora bought about $8.9K of MBBC on Jun 10, 2026; 3 other insiders bought within 30 days and 6 funds added in the latest 13F quarter.
37 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
See all insider buying · insider selling
Showing the latest few. to see 32 more transactions and use the screener and CSV export. We store only your email; there is no password.
Seven facts, ranked against the sector · Rank is not a forecast
Insiders
net +$119.7K over 180 days
more than 85% of Banks
Congress
no House purchase disclosed in the last 12 months
Funds
6 funds bought in last quarter
the lowest in Banks
Revenue
no revenue reported in any filing
Margin
no margin: no revenue reported
Buybacks
$123.6K repurchased, FY to 2026-06-30
below 94% of Banks
Short interest
0.3% of the float short (float per yahoo 2026-10-26) · 1.5 days to cover · settled 2026-09-30
below 81% of Banks
What changed in the last 30 days
Oct 27Insider buying stopped: no purchases in 90 days after 25 in the prior 90
Why it matters
The absence is the signal: 25 purchases in one 90-day window and none in the next is a change of behaviour, not a filing.

Watch MBBC

A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.

The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
+34.6%12M
-3%+12%+27%+42%2025-102025-122026-022026-042026-062026-082026-10 2026-06-09 · Spatz Nora bought $27.6K2025-11-13 · Zillges Nicholas W bought $14.6K2026-06-16 · Zillges Nicholas W bought $14.6K2025-11-26 · Zillges Nicholas W bought $12.2K2026-06-09 · Cornish Terry bought $10.0K2026-06-03 · Spatz Nora bought $9.9K2026-06-10 · Spatz Nora bought $8.9K2026-06-09 · Zillges Nicholas W bought $7.8K2026-06-09 · Knopf Michelle bought $7.5K2026-06-05 · Spatz Nora bought $4.6K2026-06-03 · Cornish Terry bought $3.6K2026-06-10 · Cornish Terry bought $3.2K2026-06-08 · Spatz Nora bought $2.8K2026-06-03 · Zillges Nicholas W bought $2.8K2026-06-03 · Knopf Michelle bought $2.7K2026-06-10 · Zillges Nicholas W bought $2.5K2026-06-10 · Knopf Michelle bought $2.4K2026-06-05 · Cornish Terry bought $1.7K2026-06-05 · Zillges Nicholas W bought $1.3K2026-06-05 · Knopf Michelle bought $1.2K2026-06-04 · Spatz Nora bought $1.0K2026-06-08 · Cornish Terry bought $1.0K2026-06-08 · Zillges Nicholas W bought $7832026-06-08 · Knopf Michelle bought $7692026-06-04 · Cornish Terry bought $3722026-06-04 · Zillges Nicholas W bought $2892026-06-04 · Knopf Michelle bought $275
Insider buy
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns MBBC: institutional holders (13F)

13F holdings, latest reported quarter
RAFFLES ASSOCIATES LP
215,328 sh
$3.3M
MALTESE CAPITAL MANAGEMENT LLC
145,298 sh
$2.2M
ALLIANCEBERNSTEIN L.P.
153,238 sh
$2.1M
VANGUARD CAPITAL MANAGEMENT LLC
76,027 sh
$1.2M
Minerva Advisors LLC
55,750 sh
$851.9K

Congress trades in MBBC

No Congress trades reported
No House member has disclosed a trade in this stock. See what Congress is buying.

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

MBBC planned insider sales (Form 144)

No planned-sale notices
No insider has filed to sell. Watch this after a run-up.

MBBC mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
iShares Micro-Cap ETF
$120.7K position · as of 2026-06-30
0.0%
1290 VT Micro Cap Portfolio
$7.0K position · as of 2026-06-30
0.0%
VANGUARD EXTENDED MARKET INDEX FUND
$289.4K position · as of 2026-06-30
0.0%
Fidelity Extended Market Index Fund
$83.9K position · as of 2026-05-31
0.0%
VANGUARD BALANCED INDEX FUND
$25.8K position · as of 2026-06-30
0.0%
VANGUARD TOTAL STOCK MARKET INDEX FUND
$846.5K position · as of 2026-06-30
0.0%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M · % is the share of the fund's own portfolio
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
4 insiders reported buying shares.
The record shows a net $119.7K bought by insiders over 180 days, 6 funds added last quarter. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector by SEC SIC code
UMBFBWFGPBPEBOFMBMGABCNEWTPCBDCOMISBAWSBFJMSB

MBBC financials

Ratios from the company's XBRL filings, latest filings
Revenue, TTM
n/a
fewer than four consecutive quarters of revenue filed
Net margin, TTM
n/a
needs four consecutive quarters of both revenue and net income
Free cash flow, TTM
$2.0M
operating cash flow minus capex, 2025-07-01 to 2026-06-30
Debt to equity
0.00x
current debt only, 2024-03-31 (27 months older than the period end); equity 2026-06-30
Cash flow to debt
n/a
no debt to cover
Return on equity
+3.8%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets
+0.7%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on invested capital
n/a
fewer than four consecutive quarters of operating income
Return on capital employed
n/a
fewer than four consecutive quarters of operating income
P/E, trailing
21.90x
close 2026-10-23 over four quarters of diluted EPS, 2025-07-01 to 2026-06-30
Enterprise value
n/a
no cash line filed
FCF yield
+4.6%
TTM free cash flow over market value at close 2026-10-23
PEG, trailing
0.01x
P/E over trailing EPS growth of 3250%: four quarters to 2026-06-30 against the four to 2025-06-30
Price as of 2026-10-23. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2026-062025-062024-062023-06
Net income$1.8M$42.0K-$187.0K$1.7M
EPS (diluted)0.660.02-0.070.79
Operating cash flow$2.5M$1.4M$416.6K$2.0M
Buybacks$123.6K$82.2K$156.2Kn/a
SEC XBRL, fiscal years, as known on 2026-10-27

MBBC Stock Sonar score 5/7 axes

Find similar shapesCompare

MBBC ranks highest on financial health (99th percentile) and insider conviction (86th), and lowest on institutional and government (1st), among Banks peers.

ProfitHealthInsidersInstitutionsRisk
Profitability
18
Inputs
  • Return on equity+3.8% · 15 pct, sector of 327
  • Return on assets+0.7% · 22 pct, sector of 334
  • Return on invested capitalfewer than four consecutive quarters of operating income
  • Return on capital employedfewer than four consecutive quarters of operating income
Financial health
100
Inputs
  • Debt to equity0.00x · 100 pct, sector of 229
  • Cash flow to debtno debt to cover
Insider conviction
86
Inputs
  • Net Form 4 buying (codes P and S), 180d$120K · 85 pct, sector of 274
  • Insider buyers, 180d4 · 86 pct, sector of 274
Institutional and government
0
Inputs
  • Funds adding, latest quarter6 · 0 pct, sector of 257
  • Congress net buyers, 365dno Congress trades in 365 days
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
81
Inputs
  • Short interest, % of float+0.3% · 81 pct, sector of 378
  • Recalls per $1B revenue, 3yrevenue under $50M or not filed, so a count cannot be scaled to size
  • EPA cases per $1B revenue, 5yrevenue under $50M or not filed, so a count cannot be scaled to size
  • New text in Risk Factors, latest 10-Kneeds two 10-Ks with a Risk Factors section (not 20-F filers or stubs)
2 not measured: Growth, US patents
  • Growth needs 1 of 2 inputs, 0 present: no backlog line filed, or no year-earlier backlog; no revenue for this year and the year before
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

5 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored

MBBC filings, in plain words

Are Marathon Bancorp insiders buying or selling MBBC?

In the 180 days to 2026-10-27, Marathon Bancorp insiders were net buyers, a net $119.7K across purchases and sales reported on Form 4, by 4 buyers.

Read the full summary

In the 180 days to 2026-10-27, Marathon Bancorp insiders were net buyers of MBBC, a net $119.7K across purchases and sales reported on Form 4 by 4 buyers. 4 insiders reported purchases in that window. Each figure is counted from SEC and House filings as of 2026-10-27, dated the day the filing was made public.

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