| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Tatum Timothy E | VP Regulatory Affairs (IPC) | 1221 W IDAHO ST, BOISE | /s/ Cheryl W. Thompson, Attorney-in-Fact | 24 Feb 2026 | 0002078099 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IDA | Common Stock | Award | +2,019 | +544% | 2,390 | 20 Feb 2026 | Direct | F1, F2 | ||
| transaction | IDA | Common Stock | Tax liability | $127,440 | -911 | -38% | $139.89 | 1,479 | 20 Feb 2026 | Direct | F2 |
| holding | IDA | Common Stock (401(k)) | 3,301 | 20 Feb 2026 | By Plan Trustee | F3 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IDA | Restricted Stock Units | Award | $0 | +588 | $0.000000 | 588 | 20 Feb 2026 | Common Stock | 588 | Direct | F4, F5 |
| Id | Content |
|---|---|
| F1 | These shares were received for no consideration upon the satisfaction of performance criteria underlying an award of performance-based units for the 2023-2025 performance period. |
| F2 | Comprised of 60.014 shares in the reporting person's dividend reinvestment plan to date. |
| F3 | Total shares in 401(k) plan to date. |
| F4 | Each restricted stock unit represents a contingent right to receive one share of IDA common stock. |
| F5 | The restricted stock units vest on January 1, 2029. |