| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Vollmer Jason L | CFO | 1200 WEST CENTURY AVENUE, BISMARCK | Anthony D. Foti, Attorney-in-Fact for Jason L. Vollmer | 19 Aug 2025 | 0001626019 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MDU | Common Stock | Purchase | $81,375 | +5,000 | +1.5% | $16.28 | 339,548 | 19 Aug 2025 | Direct | F1 |
| holding | MDU | Common Stock - 401(k) | 8,394 | 19 Aug 2025 | By Trustee |
| Id | Content |
|---|---|
| F1 | Mr. Vollmer purchased these shares in an open market transaction. |