| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Colburn Mitchel D | VP of Plan, Eng, & Const (IPC) | 1221 W IDAHO STREET, BOISE | /s/ Cheryl W. Thompson, Attorney-in-Fact | 05 Jan 2026 | 0001821084 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IDA | Common Stock | Options Exercise | $0 | +500 | +20% | $0.000000 | 2,989 | 01 Jan 2026 | Direct | F1, F2 |
| transaction | IDA | Common Stock | Tax liability | $28,642 | -225 | -7.5% | $127.30 | 2,764 | 02 Jan 2026 | Direct | F2 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IDA | Restricted Stock Units | Options Exercise | $0 | -500 | -100% | $0.000000 | 0 | 01 Jan 2026 | Common Stock | 500 | $0.000000 | Direct | F1, F3 |
| Id | Content |
|---|---|
| F1 | Each restricted stock unit represents a contingent right to receive one share of IDA common stock. |
| F2 | Includes 148.694 shares in the reporting person's dividend reinvestment plan to date. |
| F3 | The restricted stock units vested on January 1, 2026. |