STOCK TITAN

Marathon Bancorp (MBBC) director Thomas Grimm granted shares and 8,467 stock options

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Marathon Bancorp director Thomas L. Grimm reported new equity awards and updated holdings. He received 3,386 shares of common stock as a grant at no cost, increasing his directly held common stock to 6,384 shares. Separately, a trust associated with him holds 22,294 shares of common stock.

Grimm was also granted 8,467 stock options with an exercise price of $14.55 per share, all held directly. These options vest at a rate of 20% per year commencing on June 15, 2027. He continues to hold previously granted options covering 600 shares at $6.48 and 2,400 shares at $8.13, each vesting 20% annually from earlier dates.

Positive

  • None.

Negative

  • None.
Insider Grimm Thomas L
Role null
Type Security Shares Price Value
Grant/Award Stock Options 8,467 $0.00 --
Grant/Award Common Stock 3,386 $0.00 --
holding Stock Options -- -- --
holding Stock Options -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Stock Options — 8,467 shares (Direct, null); Common Stock — 6,384 shares (Direct, null); Common Stock — 22,294 shares (Indirect, By Trust)
Footnotes (1)
  1. Shares of restricted stock vest at a rate of 20% per year commencing on June 15, 2027. Includes shares of restricted stock which 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 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.
Restricted stock grant 3,386 shares Common stock awarded at $0.00 per share to Thomas L. Grimm
New stock options granted 8,467 options at $14.55 Exercise price per share; options on common stock
Direct common stock holdings 6,384 shares Common stock held directly after reported transactions
Indirect common stock holdings 22,294 shares Common stock held indirectly by trust
Existing options at $6.48 600 underlying shares Stock options on common stock, direct ownership
Existing options at $8.13 2,400 underlying shares Stock options on common stock, direct ownership
New options vesting start June 15, 2027 20% per year vesting schedule for new options and related restricted stock
restricted stock financial
"Shares of restricted stock vest at a rate of 20% per year"
Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.
Stock options financial
"Stock options vest at a rate of 20% per year"
Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.
exercise price financial
"Stock options with an exercise price of 14.5500 per share"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
By Trust financial
"Common Stock reported as indirect ownership with nature of ownership: By Trust"
vest financial
"vest at a rate of 20% per year commencing on June 15, 2027"
A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Grimm Thomas L

(Last)(First)(Middle)
500 SCOTT STREET

(Street)
WAUSAU WISCONSIN 54403

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Marathon Bancorp, Inc. /MD/ [ MBBC ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock06/15/2026A3,386(1)A$06,384(2)D
Common Stock22,294IBy Trust
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options$14.5506/15/2026A8,467(3)06/15/202706/15/2036Common Stock8,467(3)$08,467(3)D
Stock Options$8.1306/28/202306/28/2032Common Stock2,400(4)2,400(4)D
Stock Options$6.4805/16/202405/16/2033Common Stock600(5)600(5)D
Explanation of Responses:
1. Shares of restricted stock vest at a rate of 20% per year commencing on June 15, 2027.
2. Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023.
3. Stock options vest at a rate of 20% per year commencing on June 15, 2027.
4. Stock options vest at a rate of 20% per year commencing on June 28, 2023.
5. Stock options vest at a rate of 20% per year commencing on May 16, 2024.
/s/ Benjamin Azoff, pursuant to power of attorney06/16/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did Thomas L. Grimm report for MBBC?

Thomas L. Grimm reported receiving 3,386 shares of common stock and 8,467 stock options in compensation-related grants. He also reported his updated direct and trust-held share positions and the remaining stock options from prior awards.

How many Marathon Bancorp (MBBC) shares does Thomas L. Grimm now hold directly and indirectly?

After the reported grants, Thomas L. Grimm holds 6,384 shares of common stock directly. A related trust holds an additional 22,294 common shares, reported as indirect ownership, reflecting shares he is associated with but that are held by the trust.

What stock option awards did Thomas L. Grimm receive from Marathon Bancorp (MBBC)?

He received 8,467 stock options with an exercise price of $14.55 per share. These options relate to common stock and vest 20% per year starting on June 15, 2027, making this a long-term, compensation-based equity incentive.

What existing stock options does Thomas L. Grimm hold in MBBC?

He holds options tied to 600 shares at $6.48 and 2,400 shares at $8.13 per share. These options vest at 20% annually from earlier commencement dates, providing additional potential future equity exposure in Marathon Bancorp.

How do the restricted stock grants to Thomas L. Grimm for MBBC vest?

The restricted stock grants vest 20% per year beginning on June 15, 2027. Other restricted shares included in his holdings vest 20% per year beginning on June 28, 2023, creating a staggered vesting schedule over multiple years.