Marathon Bancorp, Inc. (MBBC) has 9 known insider and institutional holders on record. The largest holder is Zientara Amy with 19,226 shares. Other notable holders include Knopf Michelle and Wimmer Timothy R.
Over the last 12 months, insiders have made 34 transactions in MBBC stock — 21 buys (valued at $459.68K) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
MBBC Insider Ownership
Top Holder
Zientara Amy
19,226 shares
Buys (12 mo)
21
$459.68K value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Zientara Amy |
Other: Chairwoman of the Board |
19,226 |
2025-04-22 |
|
| 2 |
Knopf Michelle |
EVP and COO |
17,742 |
2025-12-03 |
|
| 3 |
Wimmer Timothy R |
Director |
9,364 |
2025-04-22 |
|
| 4 |
Selting-buchberger Joy |
SVP and CFO |
5,338 |
2025-07-01 |
|
| 5 |
Zillges Nicholas W |
President and CEO |
4,500 |
2026-02-24 |
|
| 6 |
Werth Ann M |
Director |
3,617 |
2025-04-22 |
|
| 7 |
Cornish Terry |
SVP and Cco |
3,044 |
2025-07-01 |
|
| 8 |
Spatz Nora |
EVP and CAO |
2,883 |
2026-03-18 |
|
| 9 |
Grimm Thomas L |
Director |
900 |
2026-03-20 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-20 |
Grimm Thomas L |
Director |
Option Exercise (Sell) |
- |
$6.48 |
- |
| 2026-03-18 |
Spatz Nora |
EVP and CAO |
Option Exercise (Sell) |
1,921 |
$6.48 |
$12.45K |
| 2026-02-23 |
Zillges Nicholas W |
President and CEO |
Option Exercise (Sell) |
2,998 |
$6.48 |
$19.43K |
| 2025-12-02 |
Spatz Nora |
EVP and CAO |
Discretionary Buy |
1,220 |
$11.11 |
$13.55K |
| 2025-12-01 |
Spatz Nora |
EVP and CAO |
Discretionary Buy |
3,166 |
$11.27 |
$35.67K |
| 2025-12-02 |
Knopf Michelle |
EVP and COO |
Discretionary Buy |
536 |
$11.11 |
$5.95K |
| 2025-12-01 |
Knopf Michelle |
EVP and COO |
Discretionary Buy |
1,393 |
$11.27 |
$15.69K |
| 2025-12-02 |
Zillges Nicholas W |
President and CEO |
Discretionary Buy |
634 |
$11.11 |
$7.04K |
| 2025-12-01 |
Zillges Nicholas W |
President and CEO |
Discretionary Buy |
1,646 |
$11.27 |
$18.55K |
| 2025-11-26 |
Zillges Nicholas W |
President and CEO |
Informative Buy |
1,075 |
$11.37 |
$12.22K |
| 2025-11-13 |
Zillges Nicholas W |
President and CEO |
Informative Buy |
1,325 |
$11.00 |
$14.57K |
| 2025-06-28 |
Zillges Nicholas W |
President and CEO |
Tax Withholding of RSU |
1,169 |
$9.99 |
$11.68K |
| 2025-06-28 |
Spatz Nora |
EVP and CAO |
Tax Withholding of RSU |
451 |
$9.99 |
$4.51K |
| 2025-06-28 |
Cornish Terry |
SVP and Cco |
Tax Withholding of RSU |
225 |
$9.99 |
$2.25K |
| 2025-06-28 |
Knopf Michelle |
EVP and COO |
Tax Withholding of RSU |
197 |
$9.99 |
$1.97K |
| 2025-06-28 |
Selting-buchberger Joy |
SVP and CFO |
Tax Withholding of RSU |
517 |
$9.99 |
$5.16K |
| 2025-06-28 |
Zillges Nicholas W |
President and CEO |
Tax Withholding of RSU |
1,196 |
$9.99 |
$11.95K |
| 2025-06-13 |
Zillges Nicholas W |
President and CEO |
Informative Buy |
500 |
$9.99 |
$5K |
| 2025-05-29 |
Spatz Nora |
EVP and CAO |
Discretionary Buy |
992 |
$10.01 |
$9.93K |
| 2025-05-29 |
Zillges Nicholas W |
President and CEO |
Discretionary Buy |
695 |
$10.01 |
$6.96K |
| 2025-05-16 |
Spatz Nora |
EVP and CAO |
Tax Withholding of RSU |
29 |
$10.03 |
$290.87 |
| 2025-05-16 |
Cornish Terry |
SVP and Cco |
Tax Withholding of RSU |
38 |
$10.03 |
$381.14 |
| 2025-05-16 |
Knopf Michelle |
EVP and COO |
Tax Withholding of RSU |
70 |
$10.03 |
$702.10 |
| 2025-05-16 |
Selting-buchberger Joy |
SVP and CFO |
Tax Withholding of RSU |
44 |
$10.03 |
$441.32 |
| 2025-05-16 |
Zillges Nicholas W |
President and CEO |
Informative Buy |
500 |
$10.07 |
$5.03K |
