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SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•37 filings

MBBC

Marathon Bancorp, Inc. /MD/

No net buying or selling imbalance over the last 3 months

No net buyers or sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found 9 CEO/CFO purchases over 12 months.

How to read this signal

Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.

JSON example

3-month balance

$0.00

0 buyers · 0 sellers

12-month purchases

$146,451

4 distinct insiders

12-month sales

$0.00

0 distinct insiders

Highlighted alerts

27

0 Rule 10b5-1 trades treated as informational

Buying cluster · 30 days

Fewer than three distinct buyers

CEO/CFO purchases · 12 months

9 executive purchases found

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Form 4 raw → Raspberry

The value is in what we do not call a signal.

The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.

93
Raw transactions
Everything returned by the filing
27
Voluntary view
P/S trades after deterministic checks
57
Administrative noise
Stored, never alerted
0
10b5-1
Shown as informational
SEC ownership XML facts
Code
M
Shares
962
Price
$6.48
Footnotes
6

Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023. Includes shares of restricted stock which vest at a rate of 20% per year commencing on May 16, 2024. Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 15, 2027. Stock options vest at a rate of 20% per year commencing on June 28, 2023. Stock options vest at a rate of 20% per year commencing on May 16, 2024. Stock options vest at a rate of 20% per year commencing on June 15, 2027.

Raspberry interpretation
Informational — no alert

Reason: administrative_code.

Verify in SEC EDGAR

Recent transactions

Voluntary purchases and sales; administrative noise stays hidden.

27 transactions

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
970
Price
$15.00
Value
$14,550
Open SEC filing

Cornish Terry

SVP and CCO

PurchaseAlert
Shares
219
Price
$14.75
Value
$3,230
Open SEC filing

Knopf Michelle

EVP and COO

PurchaseAlert
Shares
164
Price
$14.75
Value
$2,419
Open SEC filing

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
170
Price
$14.75
Value
$2,508
Open SEC filing

Spatz Nora

EVP and CAO

PurchaseAlert
Shares
602
Price
$14.75
Value
$8,880
Open SEC filing

Cornish Terry

SVP and CCO

PurchaseAlert
Shares
693
Price
$14.50
Value
$10,049
Open SEC filing

Knopf Michelle

EVP and COO

PurchaseAlert
Shares
519
Price
$14.50
Value
$7,526
Open SEC filing

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
537
Price
$14.50
Value
$7,787
Open SEC filing

Spatz Nora

EVP and CAO

PurchaseAlert
Shares
1,904
Price
$14.50
Value
$27,608
Open SEC filing

Cornish Terry

SVP and CCO

PurchaseAlert
Shares
71
Price
$14.24
Value
$1,011
Open SEC filing

Knopf Michelle

EVP and COO

PurchaseAlert
Shares
54
Price
$14.24
Value
$769.01
Open SEC filing

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
55
Price
$14.24
Value
$783.26
Open SEC filing

Spatz Nora

EVP and CAO

PurchaseAlert
Shares
197
Price
$14.24
Value
$2,805
Open SEC filing

Cornish Terry

SVP and CCO

PurchaseAlert
Shares
116
Price
$14.25
Value
$1,653
Open SEC filing

Knopf Michelle

EVP and COO

PurchaseAlert
Shares
87
Price
$14.25
Value
$1,240
Open SEC filing

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
90
Price
$14.25
Value
$1,282
Open SEC filing

Spatz Nora

EVP and CAO

PurchaseAlert
Shares
320
Price
$14.25
Value
$4,559
Open SEC filing

Cornish Terry

SVP and CCO

PurchaseAlert
Shares
27
Price
$13.77
Value
$371.73
Open SEC filing

Knopf Michelle

EVP and COO

PurchaseAlert
Shares
20
Price
$13.77
Value
$275.36
Open SEC filing

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
21
Price
$13.77
Value
$289.12
Open SEC filing

Spatz Nora

EVP and CAO

PurchaseAlert
Shares
74
Price
$13.77
Value
$1,019
Open SEC filing

Cornish Terry

SVP and CCO

PurchaseAlert
Shares
263
Price
$13.75
Value
$3,616
Open SEC filing

Knopf Michelle

EVP and COO

PurchaseAlert
Shares
197
Price
$13.75
Value
$2,708
Open SEC filing

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
203
Price
$13.75
Value
$2,791
Open SEC filing

Spatz Nora

EVP and CAO

PurchaseAlert
Shares
722
Price
$13.75
Value
$9,926
Open SEC filing

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
1,075
Price
$11.37
Value
$12,223
Open SEC filing

Zillges Nicholas W

President and CEO

PurchaseAlert
Shares
1,325
Price
$11.00
Value
$14,575
Open SEC filing

“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.