| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Schroeppel Bobbi L | VP - HR, Cust Care, Corp Comm | 3010 WEST 69TH STREET, SIOUX FALLS | Emily L. Folsom, by power of attorney | 22 Jan 2026 | 0001335071 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NWE | Common Stock | Tax liability | $21,105 | -327 | -0.92% | $64.54 | 35,336 | 22 Jan 2026 | Direct |