| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| O'Sullivan Stephanie L. | Director | 4101 WASHINGTON AVENUE, NEWPORT NEWS | /s/ Tiffany M. King, Attorney-in-Fact | 05 Jan 2026 | 0001842003 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | HII | Common Stock (SUA) | Award | $48,615 | +139 | +3.7% | $349.75 | 3,884 | 02 Jan 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 Long-Term Incentive Stock Plan in an exempt transaction pursuant to Rule 16b-3. |