Grimm Thomas L 4

What Happened
Thomas L. Grimm, a director of Marathon Bancorp, exercised stock-option derivatives on March 20, 2026 (transaction code M) to acquire a total of 4,198 common shares: 3,599 shares at $8.13 each (cost $29,260) and 599 shares at $6.48 each (cost $3,882), for a combined outlay of $33,142. The Form 4 also lists two derivative "disposed" line items with $0.00 reported, but those entries do not show share counts or amounts in the provided data.

Key Details

• Transaction date: 2026-03-20. Exercise (code M) for 3,599 shares @ $8.13 and 599 shares @ $6.48.
• Total shares acquired: 4,198. Total cash paid: $33,142.
• Shares owned after transaction: Not specified in the provided filing (see full Form 4 for the insider’s post-transaction holdings).
• Footnotes on vesting: F1 — restricted stock vests 20%/year beginning June 28, 2023; F2 — some options vest 20%/year beginning June 28, 2023; F3 — other options vest 20%/year beginning May 16, 2024.
• Filing timeliness: No late filing flag indicated in the information provided.
• Transaction type explanation: Code M indicates exercise/conversion of derivatives (options).

Context
Exercising options is an acquisition of shares that usually reflects option holder mechanics (paying the strike price to convert options into stock); it is not the same as an open-market purchase of stock for investment purposes. The filing does not indicate that shares were immediately sold (a cashless exercise) or provide details on the two derivative disposal lines—review the full Form 4 for clarifying language (e.g., tax withholding or net-settlement) if needed.