| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Nooney Kimberly F | SVP & CFO | PO BOX 1400, RAPID CITY | /s/Travis Frederickson | 12 Nov 2025 | 0001972522 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BKH | Common Stock | Sale | $1,025,150 | -14,500 | -30% | $70.70 | 34,621 | 10 Nov 2025 | Direct | |
| holding | BKH | Common Stock | 4 | 10 Nov 2025 | 401K |