---
schema_version: "secwatch.filing_event.v1"
accession: "0000943374-25-000161"
form_type: "8-K"
ticker: "MBBC"
cik: "0001835385"
company_name: "Marathon Bancorp, Inc. /MD/"
filed_at: "2025-04-21T23:59:59+00:00"
generated_at: "2026-05-23T10:34:03.026250+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Marathon Bancorp completes mutual-to-stock conversion, 1.69M shares sold, expects Nasdaq listing April 22

## Summary
- MHC converted to stock form and ceased to exist; ~2.94M common shares outstanding after offering.
- Company sold 1,693,411 shares in the related stock offering.
- Common stock (MBBC) expected to begin trading on Nasdaq Capital Market on April 22, 2025.
- Continental Stock Transfer to mail Direct Registration statements and interest checks on or about April 22.

## SEC filing metadata
- accession: 0000943374-25-000161
- form_type: 8-K
- ticker: MBBC
- cik: 0001835385
- company_name: Marathon Bancorp, Inc. /MD/
- filed_at: 2025-04-21T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000161/0000943374-25-000161-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1835385/000094337425000161/form8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000943374-25-000161
- JSON: https://secwatch.observer/filing/0000943374-25-000161.json
- Plain text: https://secwatch.observer/filing/0000943374-25-000161.txt

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