| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Chewning Eric D. | EVP, Maritime Sys & Corp STR | C/O HUNTINGTON INGALLS INDUSTRIES, INC., 4101 WASHINGTON AVE., NEWPORT NEWS | /s/ Tiffany M. King, Attorney-in-Fact | 27 Feb 2026 | 0001964855 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | HII | Common Stock | Award | $2,082,944 | +4,782 | +791% | $435.58 | 5,387 | 25 Feb 2026 | Direct | F1 |
| transaction | HII | Common Stock | Tax liability | $830,041 | -1,906 | -35% | $435.58 | 3,481 | 25 Feb 2026 | Direct | F2 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | HII | Restricted Stock Rights | Award | $0 | +688 | +38% | $0.000000 | 2,513 | 25 Feb 2026 | Common Stock | 688 | Direct | F3 |
| Id | Content |
|---|---|
| F1 | Shares issued upon settlement of restricted performance stock rights ("RPSRs") for the performance period that ended on 12/31/2025. |
| F2 | Shares withheld by issuer for payment of withholding taxes on RPSRs. |
| F3 | Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/25/26 and vest ratably in three equal installments upon each of the first, second, and third anniversaries of the grant date. |