Companies / Marathon Bancorp Inc

Marathon Bancorp Inc

Nasdaq: MBBCCIK 1835385WAUSAU, WI

Financials

Revenue—
Net income$42.4K
Total debt$0
Cash—
Diluted EPS$0.02
Shares outstanding3.0M

Ownership

3.0M shares outstanding · as of May 12, 2026
2.7%Insiders
Ownership
Insiders2.70%79,774
Institutions21.05%621,083
Public float76.25%2,249,889

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 3

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Insider% of sharesShares
Zillges Nicholas WCEOPresident and CEO · Director
1.28%37,801
Grimm Thomas LDirector
0.75%21,994
Spatz NoraEVP and CAO
0.68%19,979

Institutional holders 10

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HolderValue% of shares
Maltese Capital Management LLC$1.96M4.92%
AllianceBernstein L.P.$1.86M5.19%
Raffles Associates LP$1.46M3.65%
Vanguard Group Inc$1.13M3.15%
Minerva Advisors LLC$717.1K2.00%
KLCM Advisors, Inc.$464.4K1.16%
Stilwell Value LLC$305.6K0.68%
BlackRock, Inc.$127.7K0.28%
Tower Research Capital LLC (TRC)$4.6K0.01%
Bank of America Corp /De$182<0.01%

Activity

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InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Mar 20, 2026Grimm Thomas L
Director
ExerciseCommon Stock$29.3K+4K
+20.22%
21,395
0.73% of shares
low
Mar 18, 2026Spatz Nora
Executive
ExerciseCommon Stock$19.5K+2K
+15.32%
18,058
0.61% of shares
low
Feb 23, 2026Zillges Nicholas W
CEO
ExerciseCommon Stock$19.4K+3K
+8.61%
37,801
1.28% of shares
low
Mar 18, 2026Spatz Nora
Executive
ExerciseCommon Stock$12.4K+2K
+10.64%
19,979
0.68% of shares
low
Mar 20, 2026Grimm Thomas L
Director
ExerciseCommon Stock$3.9K+599
+2.80%
21,994
0.75% of shares
low
Mar 20, 2026Grimm Thomas L
Director
ExerciseStock Options——
900
0.03% of shares
low
Mar 20, 2026Grimm Thomas L
Director
ExerciseStock Options——
2,400
0.08% of shares
low
Mar 18, 2026Spatz Nora
Executive
ExerciseStock Options—-2K
-39.99%
2,883
0.10% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
AllianceBernstein L.P.Passive13G———

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
MBBCCommon StockEquity565759206BBG00YHYKDJ1