MBBC
Marathon Bancorp, Inc. · Finance & Insurance · Market cap $45.1M
Insiders bought $120K net in the last 90 days ·0 sellers, 4 buyers· latest Form 4 filed Jun 17, 2026
Insider Buying
$146K
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Unique Insiders
4
in the rolling window
Latest filing
Jun 30, 2026
Zillges Nicholas W
Marathon Bancorp, Inc. (MBBC) has 33 SEC Form 4 filings (58 transaction rows) in the rolling window, disclosed by 4 distinct insiders. Most recent filing: Jun 30, 2026.
Inside the rolling window, 4 insiders at Marathon Bancorp, Inc. reported 27 open-market purchases totaling $146K and no open-market sales. The most active filer is President and CEO Zillges Nicholas W with 9 filings. Insiders have net bought $120K over the trailing 6 months. The most recent open-market filing is a purchase of 970 shares by President and CEO Zillges Nicholas W, dated Jun 16, 2026, worth $15K.
- Industry:Banks - Regional
- CEO:Nicholas W. Zillges
- Employees:35
- HQ:Wausau, WI, US
- IPO:2021-04-21
| Source | |||||||
|---|---|---|---|---|---|---|---|
| President and CEO | Purchase | 970 | $15K | Jun 17 | +3.0% | SEC ↗ | |
Cornish TerryFirst filing | SVP and CCO | Purchase | 263 | $4K | Jun 11 | +6.8% | SEC ↗ |
Cornish TerryFirst filing | SVP and CCO | Purchase | 27 | $372 | Jun 11 | +6.8% | SEC ↗ |
Cornish TerryFirst filing | SVP and CCO | Purchase | 116 | $2K | Jun 11 | +6.8% | SEC ↗ |
Cornish TerryFirst filing | SVP and CCO | Purchase | 71 | $1K | Jun 11 | +6.8% | SEC ↗ |
Cornish TerryFirst filing | SVP and CCO | Purchase | 693 | $10K | Jun 11 | +6.8% | SEC ↗ |
Cornish TerryFirst filing | SVP and CCO | Purchase | 219 | $3K | Jun 11 | +6.8% | SEC ↗ |
Knopf MichelleFirst filing | EVP and COO | Purchase | 197 | $3K | Jun 11 | +6.8% | SEC ↗ |
Knopf MichelleFirst filing | EVP and COO | Purchase | 20 | $275 | Jun 11 | +6.8% | SEC ↗ |
Knopf MichelleFirst filing | EVP and COO | Purchase | 87 | $1K | Jun 11 | +6.8% | SEC ↗ |
Knopf MichelleFirst filing | EVP and COO | Purchase | 54 | $769 | Jun 11 | — | SEC ↗ |
Knopf MichelleFirst filing | EVP and COO | Purchase | 519 | $8K | Jun 11 | — | SEC ↗ |
Knopf MichelleFirst filing | EVP and COO | Purchase | 164 | $2K | Jun 11 | — | SEC ↗ |
Zillges Nicholas WFirst in 7 months | President and CEO | Purchase | 203 | $3K | Jun 11 | — | SEC ↗ |
Zillges Nicholas WFirst in 7 months | President and CEO | Purchase | 21 | $289 | Jun 11 | — | SEC ↗ |
Zillges Nicholas WFirst in 7 months | President and CEO | Purchase | 90 | $1K | Jun 11 | — | SEC ↗ |
Zillges Nicholas WFirst in 7 months | President and CEO | Purchase | 55 | $783 | Jun 11 | — | SEC ↗ |
Zillges Nicholas WFirst in 7 months | President and CEO | Purchase | 537 | $8K | Jun 11 | — | SEC ↗ |
Zillges Nicholas WFirst in 7 months | President and CEO | Purchase | 170 | $3K | Jun 11 | — | SEC ↗ |
Spatz NoraFirst filing | EVP and CAO | Purchase | 722 | $10K | Jun 11 | — | SEC ↗ |
Spatz NoraFirst filing | EVP and CAO | Purchase | 74 | $1K | Jun 11 | — | SEC ↗ |
Spatz NoraFirst filing | EVP and CAO | Purchase | 320 | $5K | Jun 11 | — | SEC ↗ |
Spatz NoraFirst filing | EVP and CAO | Purchase | 197 | $3K | Jun 11 | — | SEC ↗ |
Spatz NoraFirst filing | EVP and CAO | Purchase | 1,904 | $28K | Jun 11 | — | SEC ↗ |
Spatz NoraFirst filing | EVP and CAO | Purchase | 602 | $9K | Jun 11 | — | SEC ↗ |
Frequently asked questions
How many SEC Form 4 insider filings does MBBC have?
Marathon Bancorp, Inc. (MBBC) has 33 SEC Form 4 filings (58 transaction rows) in the rolling 365-day window, disclosed by 4 distinct insiders. Most recent filing: Jun 30, 2026.
When was the most recent SEC Form 4 filing for MBBC?
The most recent Form 4 filing for MBBC on Tracefour is dated Jun 30, 2026.
Who is the most active insider at MBBC?
The most active SEC Form 4 filer at MBBC in the rolling window is President and CEO Zillges Nicholas W, with 9 filings.
What is the net insider flow at MBBC over the last 6 months?
Over the trailing 180 days, insiders at MBBC have net bought $120K based on SEC Form 4 disclosures.
What is the total insider buy and sell value at MBBC in the current window?
Inside the rolling window, insiders at MBBC bought $146K and sold $0 based on SEC Form 4 filings.
Can I get alerts for MBBC insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Marathon Bancorp, Inc. (MBBC). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Marathon Bancorp, Inc. is in the Finance & Insurance sector.