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 reconcilia