Key facts
- This page summarizes Thomas L. Grimm's Form 4 filing for Marathon Bancorp, Inc. /MD/ (MBBC).
- 2 reported transactions and 3 derivative rows are listed below.
- Accepted by SEC: 16 Jun 2026, 16:48.
Thomas L. Grimm - 15 Jun 2026 Form 4 Insider Report for Marathon Bancorp, Inc. /MD/ (MBBC)
- Reporting relationship
- Director
- Issuer ticker
- MBBC
- Reported as of
- 15 Jun 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 16 Jun 2026, 16:48:43 UTC
- Prior SEC filing
- 05 Jun 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Benjamin Azoff, pursuant to power of attorney
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Thomas L. Grimm filed Form 4 for Marathon Bancorp, Inc. /MD/ (MBBC) on 16 Jun 2026.
Change
- Previous filing in this sequence was filed on 05 Jun 2026.
- 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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001856214
Primary reporting owner
Grimm Thomas L
- Relationship
- Director
- Address
- 500 SCOTT STREET, WAUSAU
- Signature
- /s/ Benjamin Azoff, pursuant to power of attorney
- Signature date
- 16 Jun 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
MBBC
transaction
Common Stock
Award
- Transaction value
- Shares
- +3,386
- Change %
- +113%
- Price
- $0.000000*
- Shares after
- 6,384
- Date
- 15 Jun 2026
- Ownership
- Direct
- Footnotes
- F1, F2
MBBC
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 22,294
- Date
- 15 Jun 2026
- Ownership
- By Trust
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
MBBC
transaction
Derivative
Stock Options
Award
- Transaction value
- Shares
- +8,467
- Change %
- Price
- $0.000000*
- Shares after
- 8,467
- Date
- 15 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 8,467
- Exercise price
- $14.55
- Footnotes
- F3
MBBC
holding
Derivative
Stock Options
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 2,400
- Date
- 15 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 2,400
- Exercise price
- $8.13
- Footnotes
- F4
MBBC
holding
Derivative
Stock Options
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 600
- Date
- 15 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 600
- Exercise price
- $6.48
- Footnotes
- F5
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 5 footnotes
Footnote F1
Shares of restricted stock vest at a rate of 20% per year commencing on June 15, 2027.
Footnote F2
Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023.
Footnote F3
Stock options vest at a rate of 20% per year commencing on June 15, 2027.
Footnote F4
Stock options vest at a rate of 20% per year commencing on June 28, 2023.
Footnote F5
Stock options vest at a rate of 20% per year commencing on May 16, 2024.