| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| JOHNSON DENNIS W | Director | 1200 WEST CENTURY AVENUE, BISMARCK | Anthony D. Foti, Attorney-in-Fact for Dennis W. Johnson | 14 Nov 2025 | 0001195487 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MDU | Common Stock | Award | $0 | +7,779 | +4.3% | $0.000000 | 187,945 | 13 Nov 2025 | Direct | |
| holding | MDU | Common Stock | 163 | 13 Nov 2025 | By Spouse |