Huntington Ingalls Industries — May 1, 2025 release

• Newport News, VA 23607 www.HII.com Page 4 of 12 HII Financial Outlook 1 •     Reaffirming FY25 outlook •     FY25 shipbuilding revenue 2 between $8.9 and $9.1 billion; expect shipbuilding operating margin 2 between 5.5% and 6.5% •     FY25 Mission Technologies revenue between $2.9 to $3.1 billion, Mission Technologies segment operating margin 2 between 4.0% and 4.5%; and Mission Technologies EBITDA margin 2 between 8.0% and 8.5% •    FY25 free cash flow 2,3 between $300 and $500 million FY25 Outlook 1 Shipbuilding Revenue 2 $8.9B - $9.1B Shipbuilding Operating Margin 2 5.5% - 6.5% Mission Technologies Revenue $2.9B - $3.1B Mission Technologies Segment Operating Margin 2 4.0% - 4.5% Mission Technologies EBITDA Margin 2 8.0% - 8.5% Operating FAS/CAS Adjustment ($43M) Non-current State Income Tax Benefit/Expense 2,4 ~$0M Interest Expense ($130M) Non-operating Retirement Benefit $191M Effective Tax Rate ~21% Depreciation & Amortization ~$340M Capital Expenditures ~4% of Sales Free Cash Flow 2,3 $300M - $500M 1 The financial outlook, expectations and other forward-looking statements provided by the company for 2025 and beyond reflect the company's judgment based on the information available at the time of this release. 2 Non-GAAP measures. See Exhibit B for definitions. In reliance upon Item 10(e)(1)(i)(B) of Regulation S-K, reconciliations of forward–looking GAAP and non–GAAP measures are not provided because of the unreasonable effort associated with providing such reconciliations due to the variability in the occurrence and the amounts of certa