MBBC is the ticker symbol for Marathon Bancorp, Inc. /MD/, a publicly traded Financials sector company listed on Nasdaq. 13F Pro tracks MBBC with AI-powered analysis, a 32-signal quality score, SEC EDGAR financials, insider transactions, and institutional 13F holdings — all sourced directly from public SEC filings.

Is MBBC a good stock to buy?

MBBC is tracked on 13F Pro with SEC EDGAR data, but is not currently included in our 32-signal AI quality ranking. The full company profile with financials and AI insights is at https://13fpro.ai/company/MBBC.

Where does 13F Pro source MBBC data?

All Marathon Bancorp, Inc. /MD/ fundamentals and ownership data come directly from SEC EDGAR. Marathon Bancorp, Inc. /MD/ files with the SEC under CIK 1835385. 13F Pro ingests XBRL financial facts from 10-K and 10-Q filings, Form 13F-HR institutional holdings, and Form 4 insider transactions, with no third-party rewrites or estimates.

Marathon Bancorp, Inc. /MD/(MBBC)— Stock Profile, AI Score & Financials

Financials · Nasdaq · AI-powered stock analysis, 32-signal quality score, SEC EDGAR financials, and institutional holdings. Updated 2026-03-31.

Marathon Bancorp, Inc. /MD/ (MBBC) stock profile, AI quality score, and SEC EDGAR financial data, a Financials sector company. MBBC is not currently included in 13F Pro's AI-ranked quality universe — below the main board's size threshold of $25m annual revenue or $100m total assets. this company reported $0.0m in revenue and is scored on the micro-cap board instead. Based on the latest XBRL financial filings (Q1 2026), Marathon Bancorp, Inc. /MD/ reports quarterly revenue of $2.3M, net income of $487.9K, an operating margin of 26.5%. Top institutional holders of MBBC by reported 13-F value include MALTESE CAPITAL MANAGEMENT, ALLIANCEBERNSTEIN L.P., RAFFLES ASSOCIATES, based on the most recent SEC filings. MBBC trades on the Nasdaq exchange and files with the SEC under CIK 1835385. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate MBBC daily and publish AI-generated analysis with cited SEC sources. The platform aggregates historical XBRL financial facts, 10-Q and 10-K filings, insider Form 4 transactions, and institutional 13-F holdings for Marathon Bancorp, Inc. /MD/ directly from SEC EDGAR.

Revenue

$2.3M

Net Income

$487.9K

Free Cash Flow

$110.1K

Operating Margin

26.5%

MBBC key financials by period

Marathon Bancorp, Inc. /MD/ reported revenue, net income and margins by fiscal period, from SEC filings.
Period	Form	Revenue	Net income	Operating margin
FY 2025	10-K	$6.8M	$42.4K	0.2%
FY 2024	10-K	$6.6M	$-187.0K	-3.8%
FY 2023	10-K	$8.0M	$1.7M	26.5%
FY 2022	10-K	$7.3M	$1.3M	24.2%
FY 2021	10-K	$7.3M	$1.4M	25.4%
FY 2020	10-K	$5.6M	$417.9K	9.1%

Institutions holding MBBC

Institutional investors reporting a position in Marathon Bancorp, Inc. /MD/ on SEC Form 13F.
Institution	Shares	Value	Reported
MALTESE CAPITAL MANAGEMENT	145,298	$2.2M	2026-06-30
ALLIANCEBERNSTEIN L.P.	153,238	$2.1M	2026-06-30
RAFFLES ASSOCIATES	107,664	$1.6M	2026-06-30
VANGUARD CAPITAL MANAGEMENT	76,027	$1.2M	2026-06-30
Minerva Advisors	55,750	$851.9K	2026-06-30
KLCM Advisors	34,320	$524.4K	2026-06-30
Stilwell Value	20,000	$305.6K	2026-06-30
VANGUARD FIDUCIARY	11,514	$175.9K	2026-06-30
CITADEL ADVISORS	10,984	$167.8K	2026-06-30
GEODE CAPITAL MANAGEMENT	10,871	$166.1K	2026-06-30

SEC EDGAR: CIK 1835385 →

Marathon Bancorp, Inc. /MD/

MBBC

NasdaqSmall CapFinancials

13F Pro Quality Score

Not in ranked universe

Below size threshold

Below the main board's size threshold of $25M annual revenue or $100M total assets. This company reported $0.0M in revenue and is scored on the micro-cap board instead.

Financial data, filings, and institutional holdings below are still tracked in full — only the proprietary quality composite is unavailable for this name.