HII director receives 123-share stock unit award

Huntington Ingalls Industries director Donald H. Kirkland received a stock-based award under the company’s long-term incentive plan.

Rhea-AI Filing Summary

Huntington Ingalls Industries director Donald H. Kirkland received a stock-based award under the company’s long-term incentive plan. On April 1, 2026, he acquired 123 shares of Common Stock (stock unit award) valued at $393.32 per share in a grant or award transaction exempt under Rule 16b-3.

These shares were deferred into a stock unit account pursuant to the company’s 2022 Long-Term Incentive Stock Plan, increasing his directly held stock unit position to 6,814.967 shares. A separate line in the filing shows a direct holding of 575 shares of Common Stock as a position entry rather than a new trade.

Insider Trade Summary

Grant/Award: 123 shares

Grant/Award 2 txns

Insider DONALD KIRKLAND H

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock (SUA)	123	$393.32	$48K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock (SUA) — 6,814.967 shares (Direct); Common Stock — 575 shares (Direct)

Footnotes (1)

1. F1. Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 Long-Term Incentive Stock Plan in an exempt transaction pursuant to Rule 16b-3.

Key Figures

Stock unit grant size: 123 shares Grant price per share: $393.32 per share Stock units after award: 6,814.967 shares +1 more

4 metrics

Stock unit grant size 123 shares Common Stock (SUA) award on April 1, 2026

Grant price per share $393.32 per share Value used for the stock unit award

Stock units after award 6,814.967 shares Total Common Stock units in stock unit account after grant

Direct Common Stock holding 575 shares Directly held Common Stock position shown as of April 1, 2026

Key Terms

stock unit account, 2022 Long-Term Incentive Stock Plan, Rule 16b-3, Grant, award, or other acquisition

4 terms

stock unit account financial

"Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 Long-Term Incentive Stock Plan"

2022 Long-Term Incentive Stock Plan financial

"pursuant to Huntington Ingalls Industries, Inc. 2022 Long-Term Incentive Stock Plan in an exempt transaction"

Rule 16b-3 regulatory

"in an exempt transaction pursuant to Rule 16b-3"

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

FAQ

What did HII director Donald H. Kirkland report in this Form 4?

Donald H. Kirkland reported receiving a grant of 123 Common Stock units. The award, valued at $393.32 per share, was issued under Huntington Ingalls Industries’ 2022 Long-Term Incentive Stock Plan and deferred into a stock unit account, increasing his incentive-based equity holdings.

Was the HII Form 4 transaction a market buy or sell of shares?

The Form 4 shows a grant or award acquisition, not an open-market transaction. Kirkland received 123 stock units as compensation under the long-term incentive plan, classified as an exempt award under Rule 16b-3, rather than choosing to buy or sell shares in the market.

How many HII stock units does Donald H. Kirkland hold after the award?

After the award, Kirkland holds 6,814.967 shares of Common Stock in the stock unit account. This reflects accumulated deferred stock-based compensation under the long-term incentive plan, separate from his directly held 575 Common Stock shares recorded as a position entry in the filing.

What is the value per share of the HII stock unit grant to Kirkland?

The stock unit grant to Kirkland is reported at $393.32 per share. This per-share value helps quantify the size of the compensation award under Huntington Ingalls Industries’ 2022 Long-Term Incentive Stock Plan, which delivered 123 Common Stock units into his deferred stock unit account.

What does Rule 16b-3 mean for this HII director stock grant?

Rule 16b-3 treatment means the award is exempt from certain short-swing profit rules. Kirkland’s 123-share stock unit grant under the 2022 Long-Term Incentive Stock Plan is characterized as an exempt insider transaction, reflecting compensation rather than discretionary trading activity in Huntington Ingalls Industries shares.

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Accepted by SEC EDGAR 04/03/2026 - 10:21 AM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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).

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^*

DONALD KIRKLAND H

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock (SUA)	04/01/2026		A		123(1)	A	$393.32	6,814.967	D
Common Stock								575	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 Long-Term Incentive Stock Plan in an exempt transaction pursuant to Rule 16b-3.

Remarks:

	/s/ Tiffany M. King, Attorney-in-Fact	04/03/2026
	** Signature of Reporting Person	Date
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)