MBBC insider buying and SEC filings, explained
Marathon Bancorp, Inc. · CIK 1835385
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$146K
Insiders who bought
4
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Jun 16, 2026 | Purchase (code P) | Nicholas W Zillges (CEO and Director) bought 970 shares at $15.00 ($15K), reported as a purchase (code P). Holdings up 2% to 57,205 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 17, 2026 |
| Jun 3–10, 2026 | Purchase (code P) | Terry Cornish (SVP and CCO) bought 1,389 shares indirectly (by retirement or benefit plan) between Jun 3 and Jun 10 at about $14.35 ($20K), reported as a purchase (code P). Holdings by retirement or benefit plan up 5% to 27,205 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 11, 2026 |
| Jun 3–10, 2026 | Purchase (code P) | Michelle Knopf (President / COO) bought 1,041 shares indirectly (by retirement or benefit plan) between Jun 3 and Jun 10 at about $14.35 ($15K), reported as a purchase (code P). Holdings by retirement or benefit plan up 6% to 19,339 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 11, 2026 |
| Jun 3–10, 2026 | Purchase (code P) | Nicholas W Zillges (CEO and Director) bought 1,076 shares indirectly (by retirement or benefit plan) between Jun 3 and Jun 10 at about $14.35 ($15K), reported as a purchase (code P). Holdings by retirement or benefit plan up 2% to 51,160 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 11, 2026 |
| Jun 3–10, 2026 | Purchase (code P) | Nora Spatz (EVP and CAO) bought 3,819 shares indirectly (by retirement or benefit plan) between Jun 3 and Jun 10 at about $14.35 ($55K), reported as a purchase (code P). Holdings by retirement or benefit plan up 11% to 39,520 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 11, 2026 |
| Nov 26, 2025 | Purchase (code P) | Nicholas W Zillges (CEO and Director) bought 1,075 shares at $11.37 ($12K), reported as a purchase (code P). Holdings up 3% to 34,803 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 28, 2025 |
| Nov 13, 2025 | Purchase (code P) | Nicholas W Zillges (CEO and Director) bought 1,325 shares at $11.00 ($15K), reported as a purchase (code P). Holdings up 4% to 33,728 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 14, 2025 |
30 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
4 insiders bought in 30 days
$120K in purchases since Jun 10, 2026 · Purchases traded Jun 10, 2026 to Jun 16, 2026 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| Nora Spatz (EVP and CAO) | $55K | Jun 10, 2026 | SEC filing |
| Nicholas W Zillges (CEO) | $15K | Jun 10, 2026 | SEC filing |
| Michelle Knopf (President / COO) | $15K | Jun 10, 2026 | SEC filing |
| Terry Cornish (SVP and CCO) | $20K | Jun 10, 2026 | SEC filing |
| Nicholas W Zillges (CEO) | $15K | Jun 16, 2026 | SEC filing |
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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