| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Jones Marne M | SVP - Utilities | PO BOX 1400, RAPID CITY | /s/Travis Frederickson | 12 Feb 2026 | 0001982919 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BKH | Common Stock | Award | $61,130 | +835 | +2.2% | $73.21 | 39,002 | 12 Feb 2026 | Direct | F1 |
| transaction | BKH | Common Stock | Tax liability | $24,477 | -334 | -0.86% | $73.21 | 38,667 | 12 Feb 2026 | Direct | F2 |
| Id | Content |
|---|---|
| F1 | Shares acquired through the 2023-2025 Performance Share Plan under the Company's Omnibus Incentive Plan. |
| F2 | Shares used to pay tax withholding associated with 2023-2025 Performance Shares Plan payout from 2-12-2026. |