---
schema_version: "secwatch.filing_event.v1"
accession: "0000943374-25-000139"
form_type: "8-K"
ticker: "MBBC"
cik: "0001835385"
company_name: "Marathon Bancorp, Inc. /MD/"
filed_at: "2025-03-24T23:59:59+00:00"
generated_at: "2026-05-24T06:51:47.955553+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Marathon Bancorp extends community offering for mutual-to-stock conversion to March 28, 2025

## Summary
- Community offering for stock conversion extended to March 28, 2025, at 3:00 p.m. CT; may close earlier if ~1,650,000 shares ordered.
- Subscription offering orders have priority; community offering preference to residents of Marathon, Ozaukee, Milwaukee, and Waukesha counties.
- At least 1,402,500 shares must be sold at minimum offering price to complete conversion; subject to regulatory and stockholder approvals.
- Stock Information Center available at (312) 461-4342, Monday–Friday, 10:00 a.m.–4:00 p.m. CT, through expiration.

## SEC filing metadata
- accession: 0000943374-25-000139
- form_type: 8-K
- ticker: MBBC
- cik: 0001835385
- company_name: Marathon Bancorp, Inc. /MD/
- filed_at: 2025-03-24T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000139/0000943374-25-000139-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000139/form8k_032425.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000943374-25-000139
- JSON: https://secwatch.observer/filing/0000943374-25-000139.json
- Plain text: https://secwatch.observer/filing/0000943374-25-000139.txt

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