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Marathon Bancorp, Inc.

MBBC
Exchange
Nasdaq
Industry
Savings Institutions, Not Federally Chartered
SEC CIK
0001835385

No open-market purchases or sales by Marathon Bancorp, Inc. insiders were filed in the last 90 days; 12 institutions reported holding it in 13F filings for Q2 2026, worth $11.1M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Marathon Bancorp, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Marathon Bancorp, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Marathon Bancorp, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Spatz NoraEVP and CAO29,259Sep 18, 20268
Zillges Nicholas WPresident and CEO55,936Jun 30, 20269
Selting-Buchberger JoySVP and CFO4,760Jun 30, 20262
Knopf MichelleEVP and COO8,557Jun 30, 20265
Cornish TerrySVP and CCO6,256Jun 30, 20264
Zientara AmyDirector, Other: Chairwoman of the Board27,110Jun 16, 20262
Grimm Thomas LDirector6,384Jun 16, 20263
Wimmer Timothy RDirector6,384Jun 16, 20262
Werth Ann MDirector8,501Jun 16, 20262
Terwilliger ThomasDirector7,185Jun 29, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jun 17, 2026 (view filing)Jun 161 dayZillges Nicholas WPresident and CEOPPurchase+970$15.00+$14.6K+1.7%57.2K after
Jun 11, 2026 (view filing)Jun 3-108 daysLateCornish TerrySVP and CCOPPurchase+1.39K$14.35+$19.9K+5.4%27.2K after6 lots
Jun 11, 2026 (view filing)Jun 3-108 daysLateKnopf MichelleEVP and COOPPurchase+1.04K$14.35+$14.9K+5.7%19.3K after6 lots
Jun 11, 2026 (view filing)Jun 3-108 daysLateZillges Nicholas WPresident and CEOPPurchase+1.08K$14.35+$15.4K+2.1%51.2K after6 lots
Jun 11, 2026 (view filing)Jun 3-108 daysLateSpatz NoraEVP and CAOPPurchase+3.82K$14.35+$54.8K+10.7%39.5K after6 lots
Nov 28, 2025 (view filing)Nov 262 daysZillges Nicholas WPresident and CEOPPurchase+1.07K$11.37+$12.2K+3.2%34.8K after
Nov 14, 2025 (view filing)Nov 131 dayZillges Nicholas WPresident and CEOPPurchase+1.32K$11.00+$14.6K+4.1%33.7K after
Jun 16, 2025 (view filing)Jun 133 daysZillges Nicholas WPresident and CEOPPurchase+500$9.99+$5.00K+1.5%33.6K after
May 20, 2025 (view filing)May 164 daysZillges Nicholas WPresident and CEOPPurchase+500$10.07+$5.04K+1.5%33.1K after
Mar 7, 2024 (view filing)Mar 61 dayZillges Nicholas WPresident and CEOPPurchase+100$9.51+$951+0.5%19.8K after
Nov 17, 2023 (view filing)Nov 161 dayZillges Nicholas WPresident and CEOPPurchase+1.10K$7.39+$8.13K+5.9%19.7K after
Nov 17, 2023 (view filing)Nov 161 dayZillges Nicholas WPresident and CEOPPurchase+440$7.20+$3.17KNew position420 after2 lots
May 22, 2023 (view filing)May 184 daysZillges Nicholas WPresident and CEOPPurchase+1.00K$9.50+$9.50K+5.4%19.4K after
May 22, 2023 (view filing)May 184 daysSpatz NoraEVP and CAOPPurchase+800$9.50+$7.60KNew position800 after
May 18, 2022 (view filing)May 171 dayZillges Nicholas WPresident and CEOPPurchase+1.02K$10.75+$11.0K+15.8%7.53K after2 lots