| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Hilton Julia A | VP and General Counsel | 1221 W IDAHO STREET, BOISE | /s/ Cheryl W. Thompson, Attorney-in-Fact | 24 Feb 2026 | 0001969668 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IDA | Common Stock | Award | +629 | +21% | 3,628 | 20 Feb 2026 | Direct | F1, F2 | ||
| transaction | IDA | Common Stock | Tax liability | $44,065 | -315 | -8.7% | $139.89 | 3,313 | 20 Feb 2026 | Direct | F2 |
| transaction | IDA | Common Stock | Sale | $142,789 | -1,000 | -30% | $142.79 | 2,313 | 23 Feb 2026 | Direct | F2, 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 | +566 | $0.000000 | 566 | 20 Feb 2026 | Common Stock | 566 | 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 | Includes 334.640 shares in the reporting person's dividend reinvestment plan to date. |
| F3 | This transaction was executed in multiple trades at prices ranging from $142.72 to $142.98. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC, the issuer or security holder of the issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 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. |