---
schema_version: "secwatch.filing_event.v1"
accession: "0000943374-25-000109"
form_type: "8-K"
ticker: "MBBC"
cik: "0001835385"
company_name: "Marathon Bancorp, Inc. /MD/"
filed_at: "2025-02-20T23:59:59+00:00"
generated_at: "2026-05-26T09:25:09.699395+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Marathon Bancorp begins stock offering in mutual-to-stock conversion

## Summary
- Offering up to 1,897,500 shares (increaseable to 2,182,125) at $10.00 per share.
- Minimum 1,402,500 shares must be sold; proceeds used for conversion from mutual holding company.
- Subscription offering to depositors and ESOP; community offering to residents of select Wisconsin counties.
- Shares expected to list on Nasdaq under 'MBBC'; offering managed by Janney Montgomery Scott.
- Subscription period runs Feb 24 through Mar 21, 2025; subject to regulatory and stockholder approvals.

## SEC filing metadata
- accession: 0000943374-25-000109
- form_type: 8-K
- ticker: MBBC
- cik: 0001835385
- company_name: Marathon Bancorp, Inc. /MD/
- filed_at: 2025-02-20T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000109/0000943374-25-000109-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000109/form8k_022025.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000943374-25-000109
- JSON: https://secwatch.observer/filing/0000943374-25-000109.json
- Plain text: https://secwatch.observer/filing/0000943374-25-000109.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.