| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| BIRD BRIAN B | President and CEO, Director | 3010 WEST 69TH STREET, SIOUX FALLS | Emily L. Folsom, by power of attorney | 19 Dec 2025 | 0001271670 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NWE | Common Stock | Tax liability | $212,271 | -3,129 | -1.5% | $67.84 | 202,884 | 19 Dec 2025 | Direct |