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  4. [Form 4] HUNTINGTON INGALLS INDUSTRIES, INC. Insider Trading Activity

Huntington Ingalls (HII) CEO Kastner sells 13,070 shares under 10b5-1 plan

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Huntington Ingalls Industries Director, President & CEO Christopher D. Kastner sold 13,070 shares of common stock on August 10, 2026 at a weighted average price of $324.92 per share, in open-market transactions executed under a Rule 10b5-1 trading plan adopted on May 12, 2026. After these sales he held 11,223.951 shares directly, plus 67,479.087 shares indirectly through the Kastner Family Trust and 101.080 shares through a 401(k) plan.

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Insider Kastner Christopher D
Role Director, President & CEO
Sold 13,070 shs ($4.25M)
Type Security Shares Price Value
Sale Common Stock F1, F2 13,070 $324.92 $4.25M
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 11,223.951 shares (Direct); Common Stock — 67,479.087 shares (Indirect, Held in the Kastner Family Trust); Common Stock — 101.08 shares (Indirect, By 401(k) Plan)
Footnotes (2)
  1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 12, 2026.
  2. F2. Represents the weighted average sale price of $324.92 rounded to the nearest hundredth. The highest price at which the shares were sold was $325.11 and the lowest price at which the shares were sold was $324.83. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
Shares sold 13,070 shares Common stock sold by Christopher D. Kastner on August 10, 2026
Weighted average sale price $324.92 per share Weighted average price for reported sales, rounded to nearest cent
Sale price range $324.83–$325.11 per share Lowest and highest prices at which shares were sold
Direct holdings after transaction 11,223.951 shares Direct HII common stock held by Kastner after sale
Family trust indirect holdings 67,479.087 shares HII common stock held in the Kastner Family Trust
401(k) indirect holdings 101.080 shares HII common stock held indirectly by 401(k) plan
10b5-1 plan adoption date May 12, 2026 Date CEO’s Rule 10b5-1 trading plan was adopted
Rule 10b5-1 trading plan regulatory
"sales reported were effected pursuant to a Rule 10b5-1 trading plan"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average sale price financial
"Represents the weighted average sale price of $324.92 rounded"
indirect ownership financial
"total shares following transaction held indirectly in the Kastner Family Trust"
401(k) Plan financial
"total shares following transaction held indirectly By 401(k) Plan"
A 401(k) plan is a workplace retirement account that lets employees set aside part of their pay into a tax-advantaged savings pot, often with employers adding matching contributions — like a workplace piggy bank for future income. It matters to investors because the amount people save and how employers fund these plans influence consumer spending, corporate payroll costs and the flow of money into financial markets, which can affect stock prices and company valuations.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What insider transaction did HII CEO Christopher Kastner report on this Form 4?
Christopher D. Kastner reported selling 13,070 shares of Huntington Ingalls Industries common stock on August 10, 2026 at a weighted average price of $324.92 per share, in open-market transactions covered by a Rule 10b5-1 trading plan.

At what prices were the HII shares sold by CEO Christopher Kastner?
The reported sales had a weighted average price of $324.92 per share. Footnote disclosure states the highest sale price was $325.11 and the lowest sale price was $324.83 during the reported transactions.

How many HII shares does Christopher Kastner hold after the reported sale?
After the sale, Christopher Kastner held 11,223.951 shares of HII common stock directly, plus 67,479.087 shares indirectly through the Kastner Family Trust and 101.080 shares held indirectly through a 401(k) plan.

Was the HII CEO stock sale made under a Rule 10b5-1 trading plan?
Yes. The filing states the sales were effected under a Rule 10b5-1 trading plan adopted by Christopher D. Kastner on May 12, 2026, indicating the transactions were pre-arranged in advance of execution.

How many total HII shares were sold by Christopher Kastner in this transaction?
The Form 4 reports that Christopher D. Kastner sold 13,070 shares of Huntington Ingalls Industries common stock on August 10, 2026 in open-market or private transactions at prices between $324.83 and $325.11 per share.

What indirect holdings of HII stock are reported for Christopher Kastner?
The filing lists indirect ownership of 67,479.087 HII shares held in the Kastner Family Trust and 101.080 shares held by a 401(k) plan, in addition to his directly held shares after the reported sale.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Kastner Christopher D
(Last)(First)(Middle)
4101 WASHINGTON AVENUE
(Street)
NEWPORT NEWS VIRGINIA 23607
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
HUNTINGTON INGALLS INDUSTRIES, INC. [ HII ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Director, President & CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/10/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock08/10/2026S13,070(1)D$324.92(2)11,223.951D
Common Stock67,479.087IHeld in the Kastner Family Trust
Common Stock101.08IBy 401(k) Plan
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 12, 2026.
2. Represents the weighted average sale price of $324.92 rounded to the nearest hundredth. The highest price at which the shares were sold was $325.11 and the lowest price at which the shares were sold was $324.83. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
Remarks:
/s/ Tiffany M. King, Attorney-in-Fact08/11/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR