Nicholas W. Zillges serves as President and CEO of Marathon Bancorp, Inc. (MBBC). Zillges has reported 11 insider filings with the SEC since 2025. The most recent filing was in June 2026.
Every role Nicholas W. Zillges has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
Marathon Bancorp, Inc. /MD/ (MBBC)1 filingLatest filing:
Nicholas W. Zillges is President and CEO, Director of Marathon Bancorp, Inc. /MD/ (MBBC). 10 SEC Form 4 filings on record going back to 2025, most recently on 30 June 2026. Most recent open-market trade: bought $15K of MBBC on 17 June 2026. Lifetime open-market purchases: $57K. Historical track record: 5/5 stars across 8 tracked purchases.
Every recent SEC Form 4 transaction Nicholas W. Zillges has reported, most recent first.
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★★★ (5/5) |
| Total purchases tracked | 8 |
| Purchases with forward-return data | 8 |
| 30-day win rate | 100% |
| 90-day win rate | 100% |
| Avg 5-day return | +1.30% |
| Avg 30-day return | +6.50% |
| Avg 90-day return | +9.84% |
| Best 30-day return |
InsiderAlpha's records for Nicholas W. Zillges go back to 2025: 10 primary Form 4 filings, an average of 5.0 per year. The typical open-market purchase is $6K (9 buys totaling $57K). The largest single buy on record is $15K of MBBC in 2025. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
Insiders who reported open-market trades in the last 12 months at the companies Nicholas W. Zillges files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Nicholas W. Zillges is a corporate insider, tracked as President and CEO, Director of Marathon Bancorp, Inc. /MD/ (MBBC). InsiderAlpha holds 10 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
1 primary Form 4 filing in the last 90 days, covering 1 company.
Recorded transactions: 9 open-market purchases ($57K) and 0 open-market sales across all tracked filings.
Across 8 tracked purchases, Nicholas W. Zillges averaged +6.5% avg 30-day return with a 100% 30-day win rate. InsiderAlpha rates the track record at 5/5 stars.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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$MBBC Marathon Bancorp, Inc. /MD/16.9K shares @ $0.00-
| +10.18% |