(MBBC)

Reporting relationship: SVP and CCO
Issuer ticker: MBBC
Reported as of: 16 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 May 2026, 15:07:12 UTC
Prior SEC filing: 01 Jul 2025
Next SEC filing: 11 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Benjamin Azoff, pursuant to power of attorney

Key filing fact

Terry Cornish filed Form 4 for Marathon Bancorp, Inc. /MD/ (MBBC) on 19 May 2026.

Key facts

This page summarizes Terry Cornish's Form 4 filing for Marathon Bancorp, Inc. /MD/ (MBBC).
1 reported transaction and 2 derivative rows are listed below.
Accepted by SEC: 19 May 2026, 15:07.

Change

Previous filing in this sequence was filed on 01 Jul 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001855828 Primary reporting owner

Cornish Terry

Relationship: SVP and CCO
Address: 500 SCOTT STREET, WAUSAU
Signature: /s/ Benjamin Azoff, pursuant to power of attorney
Signature date: 19 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MBBC transaction

Common Stock

Tax liability

Transaction value
Shares: -41
Change %: -1.3%
Price: $14.50^*
Shares after: 3,003
Date: 16 May 2026
Ownership: Direct
Footnotes: F1, F2

MBBC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 25,816
Date: 16 May 2026
Ownership: By 401(k)

MBBC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,478
Date: 16 May 2026
Ownership: By ESOP

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MBBC holding Derivative

Stock Options

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,498
Date: 16 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,498
Exercise price: $8.13
Footnotes: F3

MBBC holding Derivative

Stock Options

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,804
Date: 16 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,804
Exercise price: $6.48
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023.

Footnote F2

Includes shares of restricted stock which vest at a rate of 20% per year commencing on May 16, 2024.

Footnote F3

Stock options vest at a rate of 20% per year commencing on June 28, 2023.

Footnote F4

Stock options vest at a rate of 20% per year commencing on May 16, 2024.