Comparable stake leader
Marathon Bank Employee Stock Ownership Plan Trust
SEC ownership of Marathon Bancorp, Inc. /MD/
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001835385.
Disclosed value leader
Marathon Bank 401(k) Plan Trust
Comparable rows
3/24
Latest evidence
18 Sep 2026
- Public ticker
- MBBC on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Marathon Bank Employee Stock Ownership Plan Trust
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 24
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Marathon Bank Employee Stock Ownership Plan Trust
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
18 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001835385
- Issuer location
- Wausau, WI
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Marathon Bancorp, Inc. /MD/ (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Marathon Bank Employee St...
Disclosed value leader
Marathon Bank 401(k) Plan...
Comparable rows
3/24
Latest evidence
18 Sep 2026
13D/G
13F
3/4/5
Lead comparable stake: 8.7%
21 rows are not safely comparable across share classes.
13D/G row: Marathon Bank Employee Stock Ownership Plan Trust
Showing 1-8 of 24 holder rows.
Quick read
Marathon Bank Employee Stock Ownership Plan Trust leads the comparable SEC ownership view at 8.7%.
3 of 24 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Marathon Bank Employee Stock Ownership Plan Trust's linked filing trail.
Comparable ownership
Top 3
Marathon Bank Employee Stock Owne...
8.7%
Marathon Bank 401(k) Plan Trust
7.3%
ALLIANCEBERNSTEIN L.P.
5.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 24 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Marathon Bank Employee Stock Ownership Plan Trust |
13D/G
|
8.7%
Reported 13D/G
· 30 Jun 2025
|
$2,557,172
254,445 shares
|
$0 | 30 Jun 2025 |
| Marathon Bank 401(k) Plan Trust |
13D/G
|
7.3%
Reported 13D/G
· 30 Jun 2026
|
$3,091,976
216,071 shares
|
+$327,127 | 30 Jun 2026 |
| ALLIANCEBERNSTEIN L.P. |
13F
13D/G
Company
|
5.2%
Reported 13D/G
· 31 Dec 2025
|
$2,073,310
153,238 shares
|
— | 30 Jun 2026 |
| MALTESE CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$2,220,154
145,298 shares
|
— | 30 Jun 2026 |
| Nicholas W. Zillges |
3/4/5
President and CEO, Director
|
—
mixed-class rows
|
$2,096,246
154,464 shares
mixed-class rows
|
+$56,787 | 28 Jun 2026 |
| RAFFLES ASSOCIATES LP |
13F
Company
|
—
denominator unverified
|
$1,645,106
107,664 shares
|
— | 30 Jun 2026 |
| Nora Spatz |
3/4/5
EVP and CAO
|
—
mixed-class rows
|
$1,175,226
76,928 shares
mixed-class rows
|
+$54,797 | 18 Sep 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$1,161,693
76,027 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$146,451.
Buys
$146,451
Insiders: 4
Sells
$0
Insiders: 0
Net
+$146,451
Shares: +10,695
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 10,695
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 8,295 | 0 | $119,654 | $0 | +$119,654 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 2,400 | 0 | $26,798 | $0 | +$26,798 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-10 of 10 reporting-owner rows connected to Marathon Bancorp, Inc. /MD/. Open a relationship link for the CIK-to-CIK filing trail.
Rows
10
Largest Forms 3/4/5 holder
Nicholas W. Zillges
Net 12M change
+$146,451
Latest report
18 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Nicholas W. Zillges | President and CEO, Director | $2,096,246 | +$56,787 | +2.8% | Mixed | 28 Jun 2026 |
| Nora Spatz | EVP and CAO | $1,175,226 | +$54,797 | +4.9% | Mixed | 18 Sep 2026 |
| Terry Cornish | SVP and CCO | $578,928 | +$19,930 | +3.6% | Mixed | 28 Jun 2026 |
| Michelle Knopf | EVP and COO | $544,471 | +$14,937 | +2.8% | Mixed | 28 Jun 2026 |
| Thomas L. Grimm | Director | $503,840 | Mixed | 15 Jun 2026 | ||
| Amy Zientara | Director, Chairwoman of the Board | $482,626 | Mixed | 15 Jun 2026 | ||
| Joy Selting-Buchberger | SVP and CFO | $454,365 | Mixed | 28 Jun 2026 | ||
| Timothy R. Wimmer | Director | $389,755 | Mixed | 15 Jun 2026 | ||
| Ann M. Werth | Director | $230,846 | Mixed | 15 Jun 2026 | ||
| Thomas Terwilliger | Director | $69,551 | Mixed | 28 Jun 2022 |
Recent insider transactions for Marathon Bancorp, Inc. /MD/
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Nora Spatz | MBBC | Common Stock | Options Exercise | 7.98% | 2,163 | 29,259 | 18 Sep 2026 | Direct | ||
| Nora Spatz | MBBC | Stock Options | Options Exercise | -64.3% | -2,163 | 1,199 | 18 Sep 2026 | Direct | ||
| Terry Cornish | MBBC | Common Stock | Tax liability | -3.8% | -247 | 6,256 | 28 Jun 2026 | Direct | ||
| Michelle Knopf | MBBC | Common Stock | Tax liability | -2.56% | -225 | 8,557 | 28 Jun 2026 | Direct | ||
| Nicholas W. Zillges | MBBC | Common Stock | Tax liability | -2.22% | -1,269 | 55,936 | 28 Jun 2026 | Direct | ||
| Nora Spatz | MBBC | Common Stock | Tax liability | -1.82% | -503 | 27,096 | 28 Jun 2026 | Direct | ||
| Joy Selting-Buchberger | MBBC | Common Stock | Tax liability | -9.88% | -522 | 4,760 | 28 Jun 2026 | Direct | ||
| Nicholas W. Zillges | MBBC | Common Stock | Purchase | 1.72% | $14,550 | $15.00 | 970 | 57,205 | 16 Jun 2026 | Direct |
| Ann M. Werth | MBBC | Common Stock | Award | 66.2% | 3,386 | 8,501 | 15 Jun 2026 | Direct | ||
| Ann M. Werth | MBBC | Stock Options | Award | 8,467 | 8,467 | 15 Jun 2026 | Direct | |||
| Timothy R. Wimmer | MBBC | Common Stock | Award | 112.9% | 3,386 | 6,384 | 15 Jun 2026 | Direct | ||
| Timothy R. Wimmer | MBBC | Stock Options | Award | 8,467 | 8,467 | 15 Jun 2026 | Direct | |||
| Thomas L. Grimm | MBBC | Common Stock | Award | 112.9% | 3,386 | 6,384 | 15 Jun 2026 | Direct | ||
| Thomas L. Grimm | MBBC | Stock Options | Award | 8,467 | 8,467 | 15 Jun 2026 | Direct | |||
| Amy Zientara | MBBC | Common Stock | Award | 14.3% | 3,386 | 27,110 | 15 Jun 2026 | Direct | ||
| Amy Zientara | MBBC | Stock Options | Award | 8,467 | 8,467 | 15 Jun 2026 | Direct | |||
| Terry Cornish | MBBC | Common Stock | Award | 116.6% | 3,500 | 6,503 | 15 Jun 2026 | Direct | ||
| Terry Cornish | MBBC | Stock Options | Award | 7,000 | 7,000 | 15 Jun 2026 | Direct | |||
| Michelle Knopf | MBBC | Common Stock | Award | 163.6% | 5,450 | 8,782 | 15 Jun 2026 | Direct | ||
| Michelle Knopf | MBBC | Stock Options | Award | 10,000 | 10,000 | 15 Jun 2026 | Direct | |||
| Nicholas W. Zillges | MBBC | Common Stock | Award | 43.1% | 16,934 | 56,235 | 15 Jun 2026 | Direct | ||
| Nicholas W. Zillges | MBBC | Stock Options | Award | 42,335 | 42,335 | 15 Jun 2026 | Direct | |||
| Nora Spatz | MBBC | Common Stock | Award | 30.5% | 6,450 | 27,599 | 15 Jun 2026 | Direct | ||
| Nora Spatz | MBBC | Stock Options | Award | 11,000 | 11,000 | 15 Jun 2026 | Direct | |||
| Terry Cornish | MBBC | Common Stock | Purchase | 0.81% | $3,230 | $14.75 | 219 | 27,205 | 10 Jun 2026 | By 401(k) |
| Michelle Knopf | MBBC | Common Stock | Purchase | 0.86% | $2,419 | $14.75 | 164 | 19,339 | 10 Jun 2026 | By 401(k) |
| Nicholas W. Zillges | MBBC | Common Stock | Purchase | 0.33% | $2,508 | $14.75 | 170 | 51,160 | 10 Jun 2026 | By 401(k) |
| Nora Spatz | MBBC | Common Stock | Purchase | 1.55% | $8,880 | $14.75 | 602 | 39,520 | 10 Jun 2026 | By 401(k) |
| Terry Cornish | MBBC | Common Stock | Purchase | 2.64% | $10,048 | $14.50 | 693 | 26,986 | 09 Jun 2026 | By 401(k) |
| Michelle Knopf | MBBC | Common Stock | Purchase | 2.78% | $7,526 | $14.50 | 519 | 19,175 | 09 Jun 2026 | By 401(k) |
| Nicholas W. Zillges | MBBC | Common Stock | Purchase | 1.06% | $7,786 | $14.50 | 537 | 50,990 | 09 Jun 2026 | By 401(k) |
| Nora Spatz | MBBC | Common Stock | Purchase | 5.14% | $27,608 | $14.50 | 1,904 | 38,918 | 09 Jun 2026 | By 401(k) |
| Terry Cornish | MBBC | Common Stock | Purchase | 0.27% | $1,011 | $14.24 | 71 | 26,293 | 08 Jun 2026 | By 401(k) |
| Michelle Knopf | MBBC | Common Stock | Purchase | 0.29% | $769 | $14.24 | 54 | 18,656 | 08 Jun 2026 | By 401(k) |
| Nicholas W. Zillges | MBBC | Common Stock | Purchase | 0.11% | $783 | $14.24 | 55 | 50,453 | 08 Jun 2026 | By 401(k) |
| Nora Spatz | MBBC | Common Stock | Purchase | 0.54% | $2,805 | $14.24 | 197 | 37,014 | 08 Jun 2026 | By 401(k) |
| Terry Cornish | MBBC | Common Stock | Purchase | 0.44% | $1,653 | $14.25 | 116 | 26,222 | 05 Jun 2026 | By 401(k) |
| Michelle Knopf | MBBC | Common Stock | Purchase | 0.47% | $1,240 | $14.25 | 87 | 18,602 | 05 Jun 2026 | By 401(k) |
| Nicholas W. Zillges | MBBC | Common Stock | Purchase | 0.18% | $1,282 | $14.25 | 90 | 50,398 | 05 Jun 2026 | By 401(k) |
| Nora Spatz | MBBC | Common Stock | Purchase | 0.88% | $4,559 | $14.25 | 320 | 36,817 | 05 Jun 2026 | By 401(k) |
| Terry Cornish | MBBC | Common Stock | Purchase | 0.1% | $372 | $13.77 | 27 | 26,106 | 04 Jun 2026 | By 401(k) |
| Michelle Knopf | MBBC | Common Stock | Purchase | 0.11% | $275 | $13.77 | 20 | 18,515 | 04 Jun 2026 | By 401(k) |
| Nicholas W. Zillges | MBBC | Common Stock | Purchase | 0.04% | $289 | $13.77 | 21 | 50,308 | 04 Jun 2026 | By 401(k) |
| Nora Spatz | MBBC | Common Stock | Purchase | 0.21% | $1,019 | $13.77 | 74 | 34,497 | 04 Jun 2026 | By 401(k) |
| Terry Cornish | MBBC | Common Stock | Purchase | 1.02% | $3,616 | $13.75 | 263 | 26,079 | 03 Jun 2026 | By 401(k) |
| Michelle Knopf | MBBC | Common Stock | Purchase | 1.08% | $2,708 | $13.75 | 197 | 18,495 | 03 Jun 2026 | By 401(k) |
| Nicholas W. Zillges | MBBC | Common Stock | Purchase | 0.41% | $2,791 | $13.75 | 203 | 50,287 | 03 Jun 2026 | By 401(k) |
| Nora Spatz | MBBC | Common Stock | Purchase | 2.02% | $9,926 | $13.75 | 722 | 36,423 | 03 Jun 2026 | By 401(k) |
| Amy Zientara | MBBC | Common Stock | Options Exercise | 23.4% | 4,498 | 23,724 | 03 Jun 2026 | Direct | ||
| Amy Zientara | MBBC | Stock Options | Options Exercise | -88.2% | -4,498 | 600 | 03 Jun 2026 | Direct |
* marks a reported price that did not pass the local price check.