Huntington Ingalls Industries (HII) 4: McKibben Tracy B bought 177 shares at $274.33 on 2026-10-01 (Oct 2, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-10-01 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: HUNTINGTON INGALLS INDUSTRIES, INC. (HII) CIK: 0001501585 --- Reporting Owner --- Name: McKibben Tracy B CIK: 0001584119 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock (SUA) Date: 2026-10-01 | Code: A (Grant or award) Shares: +177 | Price: $274.33 Total Value: $48,556.41 Shares Owned After: 5,990.375 | Ownership: D (Direct) Footnotes: [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. --- Footnotes (Complete Index) --- 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. --- Signature --- /s/ /s/ Tiffany M. King, Attorney-in-Fact (2026-10-02)