| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Berzina Jeffrey B. | Controller | 3010 W. 69TH STREET, SIOUX FALLS | Emily L. Folsom, by power of attorney | 26 Jan 2026 | 0001450010 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NWE | Common Stock | Tax liability | $8,003 | -124 | -3% | $64.54 | 3,999 | 22 Jan 2026 | Direct |