| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Nakata Darren T. | Chief Legal Officer | 7001 MOUNT RUSHMORE RD, RAPID CITY | /s/Travis Frederickson | 09 Feb 2026 | 0002092488 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BKH | Common Stock | Award | $0 | +2,874 | +62% | $0.000000 | 7,495 | 06 Feb 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Shares acquired through a Restricted Stock Grant under the Company's Incentive Compensation Plan. |