Form 8-K

8-K — HUNTINGTON INGALLS INDUSTRIES, INC.

Accession: 0001501585-26-000045

Filed: 2026-07-30

Period: 2026-07-30

CIK: 0001501585

SIC: 3730 (SHIP & BOAT BUILDING & REPAIRING)

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — hii-20260730.htm (Primary)

EX-99.1 (hii2026q2earningsrelease.htm)

GRAPHIC (hii_logox2023xlogoa.jpg)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: hii-20260730.htm · Sequence: 1

hii-20260730

0001501585false00015015852026-07-302026-07-30

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_____________________________________

FORM 8-K

_____________________________________

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)

July 30, 2026

_____________________________________

HUNTINGTON INGALLS INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

_____________________________________

Delaware 001-34910 90-0607005

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4101 Washington Avenue

Newport News Virginia 23607

(Address of principal executive offices) (Zip Code)

(757) 380-2000

(Registrant’s telephone number, including area code)

(Former name or former address, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock HII New York Stock Exchange

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On July 30, 2026, Huntington Ingalls Industries, Inc. issued a press release announcing its financial results for the quarter ended June 30, 2026. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No. Description

99.1

Press Release dated July 30, 2026.

104 Cover Page Interactive Data File (embedded within Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

HUNTINGTON INGALLS INDUSTRIES, INC.

July 30, 2026

By: /s/ Thomas E. Stiehle

Thomas E. Stiehle

Executive Vice President and Chief Financial Officer

EX-99.1

Filename: hii2026q2earningsrelease.htm · Sequence: 2

Document

Exhibit 99.1

News Release

Contacts:

Brooke Hart (Media)

brooke.hart@hii.com

202-264-7108

Christie Thomas (Investors)

christie.thomas@hii-co.com

757-380-2104

HII Reports Second Quarter 2026 Results

NEWPORT NEWS, Va. (July 30, 2026) - HII (NYSE: HII) today reported results for the second quarter of fiscal 2026.

Highlights

•Second quarter revenues were $3.4 billion

•Second quarter net earnings were $208 million or $5.27 diluted earnings per share

•Company raises the FY26 shipbuilding revenue guidance range to between $10.2 and $10.4 billion1

•Company raises the low end of the FY26 shipbuilding operating margin2 guidance range1

•Company reaffirms previously issued free cash flow2 outlook1

Second Quarter Results

Second quarter 2026 revenues of $3.4 billion were up 10.9% from the second quarter of 2025, driven by growth at Newport News Shipbuilding and Ingalls Shipbuilding.

Operating income in the second quarter of 2026 was $210 million and operating margin was 6.1%, compared to $163 million and 5.3%, respectively, in the second quarter of 2025.

Segment operating income2 in the second quarter of 2026 was $224 million and segment operating margin2 was 6.6%, compared to $172 million and 5.6%, respectively, in the second quarter of 2025.

Net earnings in the second quarter of 2026 were $208 million, compared to $152 million in the second quarter of 2025. Diluted earnings per share in the quarter was $5.27, compared to $3.86 in the second quarter of 2025.

Net cash used in operating activities in the quarter was $31 million and free cash flow2 was negative $150 million, compared to net cash provided by operating activities of $823 million and free cash flow2 of $730 million in the second quarter of 2025.

New contract awards in the second quarter of 2026 were $6.7 billion, bringing total backlog to $57.3 billion as of June 30, 2026.

“We continued to make good progress on our 2026 operational initiatives, with plans in place to achieve our shipbuilding throughput improvement goal of 15%. Given the significant shipbuilding demand and our proven ability to drive higher throughput, we are pleased to increase our top line expectations for the full year while lifting the lower end of our margin expectations as we remain focused on execution," said Chris Kastner, HII’s president and CEO.

1The financial outlook, expectations, and other forward-looking statements provided by the company for 2026 and beyond reflect the company's judgment based on information available at the time of this release. Please see the "Forward-looking Statements" section in this release and our Form 10-Q for factors that may impact the company's ability to meet expectations.

2Non-GAAP measures. See Exhibit B for definitions and reconciliations.

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 1 of 12

Results of Operations

Three Months Ended Six Months Ended

June 30 June 30

($ in millions, except per share amounts) 2026 2025 $ Change % Change 2026 2025 $ Change % Change

Sales and service revenues $ 3,418 $ 3,082 $ 336 10.9 % $ 6,517 $ 5,816 $ 701 12.1 %

Operating income 210 163 47 28.8 % 365 324 41 12.7 %

Operating margin % 6.1 % 5.3 % 86 bps 5.6 % 5.6 % 3 bps

Segment operating income1

224 172 52 30.2 % 396 343 53 15.5 %

Segment operating margin %1

6.6 % 5.6 % 97 bps 6.1 % 5.9 % 18 bps

Net earnings 208 152 56 36.8 % 357 301 56 18.6 %

Diluted earnings per share $ 5.27 $ 3.86 $ 1.41 36.5 % $ 9.06 $ 7.66 $ 1.40 18.3 %

1 Non-GAAP measures that exclude non-segment factors affecting operating income. See Exhibit B for definitions and reconciliations.

Segment Operating Results

Ingalls Shipbuilding

Three Months Ended Six Months Ended

June 30 June 30

($ in millions) 2026 2025 $ Change % Change 2026 2025 $ Change % Change

Revenues $ 845 $ 724 $ 121 16.7 % $ 1,570 $ 1,361 $ 209 15.4 %

Segment operating income 58 54 4 7.4 % 107 100 7 7.0 %

Segment operating margin % 6.9 % 7.5 % (59) bps 6.8 % 7.3 % (53) bps

Ingalls Shipbuilding revenues for the second quarter of 2026 were $845 million, an increase of $121 million, or 16.7%, from the same period in 2025, primarily driven by higher volumes in amphibious assault ships.

Ingalls Shipbuilding segment operating income for the second quarter of 2026 was $58 million, an increase of $4 million from the same period in 2025. Segment operating margin in the second quarter of 2026 was 6.9%, compared to 7.5% in the same period last year. The increase in operating income was primarily driven by higher volumes in amphibious assault ships, partially offset by favorable contract adjustments in surface combatants in the second quarter of 2025.

Key Ingalls Shipbuilding milestones for the quarter:

•Awarded Frigate class (FF(X)) lead yard support services contract to procure long lead time material, execute design work and begin pre-construction activities for the first ship

•Began fabrication of guided missile destroyer John F. Lehman (DDG 137), the seventh Flight III destroyer to be constructed at Ingalls

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 2 of 12

Newport News Shipbuilding

Three Months Ended Six Months Ended

June 30 June 30

($ in millions) 2026 2025 $ Change % Change 2026 2025 $ Change % Change

Revenues $ 1,849 $ 1,603 $ 246 15.3 % $ 3,514 $ 2,999 $ 515 17.2 %

Segment operating income 111 82 29 35.4 % 199 167 32 19.2 %

Segment operating margin % 6.0 % 5.1 % 89 bps 5.7 % 5.6 % 9 bps

Newport News Shipbuilding revenues for the second quarter of 2026 were $1.8 billion, an increase of $246 million, or 15.3%, from the same period in 2025. The increase was primarily driven by higher volumes in aircraft carriers and submarines.

Newport News Shipbuilding segment operating income for the second quarter of 2026 was $111 million, an increase of $29 million from the same period in 2025. Segment operating margin in the second quarter of 2026 was 6.0% compared to 5.1% in the same period last year. The increase in segment operating income was primarily driven by contract adjustments and incentives in aircraft carriers and the higher volumes described above, partially offset by lower performance in aircraft carriers.

Key Newport News Shipbuilding milestones for the quarter:

•Redelivered Virginia-class submarine USS New Jersey (SSN 796) following completion of post-shakedown availability, a maintenance period that typically follows delivery of new ships and includes combat systems and electronics upgrades, as well as general maintenance on the submarine

•Celebrated the opening of the Carrier Refueling Overhaul Workcenter, a new facility that enhances the work environment for sailors and shipbuilders during refueling and complex overhaul of nuclear-powered aircraft carriers

Mission Technologies

Three Months Ended Six Months Ended

June 30 June 30

($ in millions) 2026 2025 $ Change % Change 2026 2025 $ Change % Change

Revenues $ 760 $ 791 $ (31) (3.9) % $ 1,508 $ 1,526 $ (18) (1.2) %

Segment operating income 55 36 19 52.8 % 90 76 14 18.4 %

Segment operating margin % 7.2 % 4.6 % 269 bps 6.0 % 5.0 % 99 bps

Mission Technologies revenues for the second quarter of 2026 were $760 million, a decrease of $31 million, or 3.9%, from the same period in 2025. The decrease was primarily due to lower volumes in All-Domain Operations, largely related to the impact of a favorable non-recurring settlement in the second quarter of 2025, as well as lower volumes in Global Security, partially offset by higher volumes in Warfare Systems and Unmanned Systems.

Mission Technologies segment operating income for the second quarter of 2026 was $55 million, an increase of $19 million from the same period in 2025. Segment operating margin in the second quarter of 2026 was 7.2%, compared to 4.6% in the same period last year. The increase in segment operating income was primarily due to higher equity income from nuclear and environmental joint ventures.

Mission Technologies results included approximately $17 million of amortization of purchased intangible assets in the second quarter of 2026, compared to approximately $23 million in the same period last year.

Mission Technologies EBITDA margin1 in the second quarter of 2026 was 10.1%, compared to 8.1% in the second quarter of 2025.

Key Mission Technologies milestones for the quarter:

•U.S. Navy selected HII’s ROMULUS Unmanned Surface Vessel to advance to the evaluation phase of the Medium Unmanned Surface Vessel program

◦Announced plans for the production of four additional ROMULUS 151 vessels in addition to the vessel currently under construction

•Delivered the first REMUS 130 unmanned underwater vehicle to the U.S. Department of War

1Non-GAAP measures. See Exhibit B for definitions and reconciliations.

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 3 of 12

HII Financial Outlook1

•FY26 shipbuilding revenue between $10.2 and $10.4 billion; expect shipbuilding operating margin2 between 6.0% and 6.5%

•FY26 Mission Technologies revenue between $3.0 and $3.2 billion

•FY26 Mission Technologies segment operating margin of approximately 5%; and Mission Technologies EBITDA margin2 between 8.4% and 8.6%

•FY26 free cash flow2 between $500 and $600 million

Prior FY26 Outlook

Current FY26 Outlook1

Shipbuilding Revenue $9.7B - $9.9B $10.2B - $10.4B

Shipbuilding Operating Margin2

5.5% - 6.5% 6.0% - 6.5%

Mission Technologies Revenue

$3.0B - $3.2B $3.0B - $3.2B

Mission Technologies Segment Operating Margin

~5% ~5%

Mission Technologies EBITDA Margin2

8.4% - 8.6% 8.4% - 8.6%

Operating FAS/CAS Adjustment ($44M) ($44M)

Non-current State Income Tax Expense3

~($20M) ~($20M)

Interest Expense ($105M) ($105M)

Non-operating Retirement Benefit $213M $213M

Effective Tax Rate ~17% ~17%

Depreciation & Amortization ~$330M ~$330M

Capital Expenditures 4% - 5% of Sales 4% - 5% of Sales

Free Cash Flow2

$500M - $600M $500M - $600M

1The financial outlook, expectations, and other forward-looking statements provided by the company for 2026 and beyond reflect the company's judgment based on the information available at the time of this release. Please see the "Forward-looking Statements" section in this release and our Form 10-Q for factors that may impact the company's ability to meet expectations.

2Non-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 certain components of GAAP and non-GAAP measures. For the same reasons, we are unable to address the significance of the unavailable information, which could be material to future results.

3Outlook is based on current tax law. Variability exists based on how and when individual states conform to recent federal tax law changes.

About HII

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 4 of 12

HII is America’s largest shipbuilder, delivering the world’s most powerful ships and all-domain mission technologies, including unmanned systems, to U.S. and allied defense customers. HII is the largest producer of unmanned underwater vehicles for the U.S. Navy and the world.

With a more than 140-year history of advancing U.S. national security, HII builds and integrates defense capabilities extending from the core fleet to C6ISR, AI/ML, EW and synthetic training. Headquartered in Virginia, HII’s workforce is 45,000 strong. For more information, visit www.HII.com.

Conference Call Information

HII will webcast its earnings conference call at 9 a.m. Eastern time today. A live audio broadcast of the conference call and supplemental presentation will be available on the investor relations page of the company’s website: www.HII.com. A replay of the call will be available on the website for a limited time.

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 5 of 12

Cautionary Statement Regarding Forward-Looking Statements and Projections

Statements in this earnings release and in our other filings with the SEC, as well as other statements we may make from time to time, other than statements of historical fact, constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. In some cases, you can identify forward-looking statements by words such as "may," "will," "should," "expects," "intends," "plans," "anticipates," "believes," "estimates," "guidance," "outlook," "predicts," "potential," "continue," and similar words or phrases or the negative of these words or phrases. These statements relate to future events or our future financial performance and involve known and unknown risks, uncertainties, and other factors that may cause our actual results, levels of activity, performance, or achievements to be materially different from any future results, levels of activity, performance, or achievements expressed or implied by these forward-looking statements. Although we believe the expectations reflected in the forward-looking statements are reasonable when made, we cannot guarantee future results, levels of activity, performance, or achievements. There are a number of important factors that could cause our actual results to differ materially from the results anticipated by our forward-looking statements, which include, but are not limited to:

•our dependence on the U.S. Government for substantially all of our business;

•significant delays or reductions in appropriations for our programs and/or changes in customer priorities and requirements (including government budgetary constraints, government shutdowns, shifts in defense spending, and changes in customer short-range and long-range plans);

•our ability to estimate our future contract costs, including cost increases due to inflation, labor challenges, changes in trade policy, or other factors and our efforts to recover or offset such costs and/or changes in estimated contract costs, and perform our contracts effectively;

•changes in business practices, procurement processes and government regulations, including changes through executive orders, contract terms, or other policies or practices applicable to our industry, and our ability to comply with such requirements;

•adverse economic conditions in the United States and globally;

•our level of indebtedness and ability to service our indebtedness;

•our ability to deliver our products and services at an affordable life cycle cost and compete within our markets;

•our ability to attract, retain, and train a qualified workforce;

•subcontractor and supplier performance and the availability and pricing of raw materials and components;

•our ability to execute our strategic plan, including with respect to share repurchases, dividends, capital expenditures, and strategic acquisitions;

•investigations, claims, disputes, enforcement actions, litigation (including criminal, civil, and administrative), and/or other legal proceedings, and improper conduct of employees, agents, subcontractors, suppliers, business partners, or joint ventures in which we participate, including the impact on our reputation or ability to do business;

•changes in key estimates and assumptions regarding our pension and retiree health care costs;

•security threats, including cyber-security threats, and related disruptions;

•natural and environmental disasters and political instability;

•health epidemics, pandemics and similar outbreaks; and

•other risk factors discussed herein and in our other filings with the SEC.

There may be other risks and uncertainties that we are unable to predict at this time or that we currently do not expect to have a material adverse effect on our business, and we undertake no obligation to update or revise any forward-looking statements. You should not place undue reliance on any forward-looking statements that we may make.

This release also contains non-GAAP financial measures and includes a GAAP reconciliation of these financial measures. Non-GAAP financial measures should not be construed as being more important than comparable GAAP measures.

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 6 of 12

Exhibit A: Financial Statements

HUNTINGTON INGALLS INDUSTRIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED)

Three Months Ended June 30 Six Months Ended June 30

(in millions, except per share amounts) 2026 2025 2026 2025

Sales and service revenues

Product sales $ 2,271 $ 1,957 $ 4,275 $ 3,670

Service revenues 1,147 1,125 2,242 2,146

Sales and service revenues 3,418 3,082 6,517 5,816

Cost of sales and service revenues

Cost of product sales 1,985 1,696 3,726 3,147

Cost of service revenues 1,002 991 1,952 1,880

Income from operating investments, net 21 8 26 21

Other income and gains, net — 1 — 1

General and administrative expenses 242 241 500 487

Operating income 210 163 365 324

Other income (expense)

Interest expense (27) (28) (49) (56)

Non-operating retirement benefit 53 47 106 95

Other, net 18 6 20 12

Earnings before income taxes 254 188 442 375

Federal and foreign income tax expense 46 36 85 74

Net earnings $ 208 $ 152 $ 357 $ 301

Basic earnings per share $ 5.27 $ 3.86 $ 9.06 $ 7.66

Weighted-average common shares outstanding 39.5 39.4 39.4 39.3

Diluted earnings per share $ 5.27 $ 3.86 $ 9.06 $ 7.66

Weighted-average diluted shares outstanding 39.5 39.4 39.4 39.3

Dividends declared per share $ 1.38 $ 1.35 $ 2.76 $ 2.70

Net earnings from above $ 208 $ 152 $ 357 $ 301

Other comprehensive income

Change in unamortized benefit plan costs 2 1 4 2

Tax expense for items of other comprehensive income — — (1) —

Other comprehensive income, net of tax 2 1 3 2

Comprehensive income $ 210 $ 153 $ 360 $ 303

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 7 of 12

HUNTINGTON INGALLS INDUSTRIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (UNAUDITED)

($ in millions) June 30, 2026 December 31, 2025

Assets

Current Assets

Cash and cash equivalents $ 12 $ 774

Accounts receivable, net of allowance for expected credit losses of $3 million as of 2026 and $2 million as of 2025

452 339

Contract assets 2,154 1,758

Inventoried costs 236 219

Income taxes receivable 279 284

Prepaid expenses and other current assets 106 77

Total current assets 3,239 3,451

Property, plant, and equipment, net of accumulated depreciation of $2,849 million as of 2026 and $2,754 million as of 2025

3,806 3,726

Operating lease assets 282 267

Goodwill 2,650 2,650

Other intangible assets, net of accumulated amortization of $1,265 million as of 2026 and $1,222 million as of 2025

651 694

Pension plan assets 1,627 1,544

Miscellaneous other assets 427 417

Total assets $ 12,682 $ 12,749

Liabilities and Stockholders' Equity

Current Liabilities

Trade accounts payable $ 737 $ 556

Accrued employees’ compensation 386 443

Current portion of postretirement plan liabilities 119 119

Current portion of workers’ compensation liabilities 220 217

Contract liabilities 690 1,220

Other current liabilities 481 490

Total current liabilities 2,633 3,045

Long-term debt 2,702 2,700

Pension plan liabilities 155 155

Other postretirement plan liabilities 189 200

Workers’ compensation liabilities 450 442

Long-term operating lease liabilities 233 223

Deferred tax liabilities 662 572

Other long-term liabilities 346 339

Total liabilities 7,370 7,676

Commitments and Contingencies

Stockholders’ Equity

Common stock, $0.01 par value; 150,000,000 shares authorized; 53,988,912 shares issued and 39,404,203 shares outstanding as of 2026, and 53,826,236 shares issued and 39,241,527 shares outstanding as of 2025

1 1

Additional paid-in capital 2,080 2,087

Retained earnings 5,730 5,487

Treasury stock (2,449) (2,449)

Accumulated other comprehensive loss (50) (53)

Total stockholders’ equity 5,312 5,073

Total liabilities and stockholders’ equity $ 12,682 $ 12,749

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 8 of 12

HUNTINGTON INGALLS INDUSTRIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

Six Months Ended June 30

($ in millions) 2026 2025

Operating Activities:

Net earnings $ 357 $ 301

Adjustments to reconcile net cash provided by (used in) operating activities:

Depreciation 112 110

Amortization of purchased intangibles 43 52

Stock-based compensation 31 33

Deferred income taxes 89 (19)

Gain on investments in marketable securities (19) (10)

Other non-cash transactions, net 12 9

Change in

Accounts receivable (113) (165)

Contract assets (396) (128)

Inventoried costs (17) (7)

Prepaid expenses and other assets (17) 57

Accounts payable and accruals (413) 272

Retiree benefits (90) (77)

Net cash provided by (used in) operating activities (421) 428

Investing Activities:

Capital expenditures

Capital expenditure additions (193) (163)

Grant proceeds for capital expenditures 3 3

Acquisitions of businesses — (133)

Other investing activities, net 1 2

Net cash used in investing activities (189) (291)

Financing Activities:

Repayment of long-term debt — (500)

Proceeds from line of credit borrowings 17 —

Repayment of line of credit borrowings (17) —

Dividends paid (109) (106)

Employee taxes on certain share-based payment arrangements (43) (14)

Other financing activities, net — (5)

Net cash used in financing activities (152) (625)

Change in cash and cash equivalents (762) (488)

Cash and cash equivalents, beginning of period 774 831

Cash and cash equivalents, end of period $ 12 $ 343

Supplemental Cash Flow Disclosure

Cash paid for income taxes (net of refunds) $ 12 $ 55

Cash paid for interest $ 59 $ 42

Non-Cash Investing and Financing Activities

Capital expenditures accrued in accounts payable $ 14 $ 6

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 9 of 12

Exhibit B: Non-GAAP Measures Definitions & Reconciliations

This earnings release contains non-GAAP (accounting principles generally accepted in the United States of America) financial measures as defined by SEC Regulation G and indicated by a footnote in the text of this release. Definitions for the non-GAAP measures, and related reconciliations, are provided below. Because not all companies use identical definitions or calculations, our presentation of these measures may not be comparable to similarly titled measures of other companies.

Segment Operating Income and Segment Operating Margin. We internally manage our operations by reference to segment operating income and segment operating margin and use these measures to evaluate our core operating performance. We believe that segment operating income and segment operating margin reflect additional ways of viewing aspects of our operations that, when viewed with our GAAP results, provide a more complete understanding of factors and trends affecting our business. These measures should be considered in addition to, and not as alternatives for, operating income and operating margin or any other performance measure presented in accordance with GAAP.

Segment operating income is defined as operating income for the relevant segment(s) before the Operating FAS/CAS Adjustment and non-current state income taxes.

Segment operating margin is defined as segment operating income as a percentage of sales and service revenues.

Shipbuilding operating margin, Mission Technologies EBITDA and Mission Technologies EBITDA margin. We use shipbuilding operating margin, Mission Technologies EBITDA and Mission Technologies EBITDA margin to evaluate our core operating performance. We believe these measures reflect additional ways of viewing aspects of our operations that, when viewed with our GAAP results, provide a more complete understanding of factors and trends affecting our business. These measures should be considered in addition to, and not as alternatives for, operating income and operating margin or any other performance measure presented in accordance with GAAP.

Shipbuilding operating margin is defined as the combined segment operating income of our Newport News Shipbuilding segment and Ingalls Shipbuilding segment as a percentage of shipbuilding revenue. Shipbuilding revenue is the sum of revenues of our Newport News Shipbuilding segment and Ingalls Shipbuilding segment.

Mission Technologies EBITDA is defined as Mission Technologies segment operating income before interest expense, income taxes, depreciation, and amortization.

Mission Technologies EBITDA margin is defined as Mission Technologies EBITDA as a percentage of Mission Technologies revenues.

Free cash flow. We use free cash flow as a key operating metric in assessing the performance of our business and as a key performance measure in evaluating management performance and determining incentive compensation. We believe free cash flow is an important measure that may be useful to investors and other users of our financial statements because it provides insight into our current and period-to-period performance and our ability to generate cash from continuing operations. Free cash flow has limitations as an analytical tool and should not be considered in isolation from, or as a substitute for, net income as a measure of our performance or net cash provided by operating activities as a measure of our liquidity.

Free cash flow is defined as net cash provided by (used in) operating activities less capital expenditures net of related grant proceeds.

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 certain components of GAAP and non-GAAP measures. For the same reasons, we are unable to address the significance of the unavailable information, which could be material to future results.

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 10 of 12

Reconciliations of Segment Operating Income and Segment Operating Margin

Three Months Ended Six Months Ended

June 30 June 30

($ in millions) 2026 2025 2026 2025

Ingalls revenues $ 845 $ 724 $ 1,570 $ 1,361

Newport News revenues 1,849 1,603 3,514 2,999

Mission Technologies revenues 760 791 1,508 1,526

Intersegment eliminations (36) (36) (75) (70)

Sales and Service Revenues 3,418 3,082 6,517 5,816

Operating Income 210 163 365 324

Operating FAS/CAS Adjustment 8 6 17 16

Non-current state income taxes 6 3 14 3

Segment Operating Income 224 172 396 343

As a percentage of sales and service revenues 6.6 % 5.6 % 6.1 % 5.9 %

Ingalls segment operating income 58 54 107 100

As a percentage of Ingalls revenues 6.9 % 7.5 % 6.8 % 7.3 %

Newport News segment operating income 111 82 199 167

As a percentage of Newport News revenues 6.0 % 5.1 % 5.7 % 5.6 %

Mission Technologies segment operating income 55 36 90 76

As a percentage of Mission Technologies revenues 7.2 % 4.6 % 6.0 % 5.0 %

Reconciliation of Free Cash Flow

Three Months Ended Six Months Ended

June 30 June 30

($ in millions) 2026 2025 2026 2025

Net cash provided by (used in) operating activities $ (31) $ 823 $ (421) $ 428

Less capital expenditures:

Capital expenditure additions (119) (96) (193) (163)

Grant proceeds for capital expenditures — 3 3 3

Free cash flow $ (150) $ 730 $ (611) $ 268

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

Page 11 of 12

Reconciliation of Mission Technologies EBITDA and EBITDA Margin

Three Months Ended Six Months Ended

June 30 June 30

($ in millions) 2026 2025 2026 2025

Mission Technologies sales and service revenues $ 760 $ 791 $ 1,508 $ 1,526

Mission Technologies segment operating income $ 55 $ 36 $ 90 $ 76

Mission Technologies depreciation expense 3 3 6 6

Mission Technologies amortization expense 17 23 35 45

Mission Technologies state tax expense 2 2 4 4

Mission Technologies EBITDA $ 77 $ 64 $ 135 $ 131

Mission Technologies EBITDA margin 10.1 % 8.1 % 9.0 % 8.6 %

HII

4101 Washington Ave. • Newport News, VA 23607

www.HII.com

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