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hii-202602050001501585false00015015852026-02-052026-02-05

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) February 5, 2026

HUNTINGTON INGALLS INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3491090-0607005 (State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

4101 Washington Avenue Newport NewsVirginia23607 (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 classTrading Symbol(s)Name of each exchange on which registered Common StockHIINew 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 February 5, 2026, Huntington Ingalls Industries, Inc. issued a press release announcing its financial results for the quarter ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 hereto. Also furnished as Exhibit 99.2 is the corporation’s earnings presentation for the fourth quarter 2025 earnings release conference call.

Item 9.01.Financial Statements and Exhibits. (d)Exhibits.

Exhibit No.  Description 99.1   Press Release dated February 5, 2026.

99.2   Earnings Presentation dated February 5, 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.

February 5, 2026 By: /s/ Thomas E. Stiehle Thomas E. Stiehle Executive Vice President and Chief Financial Officer

hii-202510300001501585false00015015852025-10-302025-10-30

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) October 30, 2025

HUNTINGTON INGALLS INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3491090-0607005 (State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

4101 Washington Avenue Newport NewsVirginia23607 (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 classTrading Symbol(s)Name of each exchange on which registered Common StockHIINew 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 October 30, 2025, Huntington Ingalls Industries, Inc. issued a press release announcing its financial results for the quarter ended September 30, 2025. A copy of the press release is furnished as Exhibit 99.1 hereto. Also furnished as Exhibit 99.2 is the corporation’s earnings presentation for the third quarter 2025 earnings release conference call.

Item 9.01.Financial Statements and Exhibits. (d)Exhibits.

Exhibit No.  Description 99.1   Press Release dated October 30, 2025.

99.2   Earnings Presentation dated October 30, 2025.

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.

October 30, 2025 By: /s/ Thomas E. Stiehle Thomas E. Stiehle Executive Vice President and Chief Financial Officer