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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1501585	Huntington Ingalls Industries Inc.	HII	Ship & Boat Building & Repairing (3730)	900607005

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1808160	N. Chad Boudreaux	4101 Washington Avenue Newport News VA 23607	Ex Vp & Chief Legal Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2025-06-03	1,965	$228.94	21,228	No	4	S	Direct
Common Stock	Disposition	2025-06-03	1,242	$227.96	0	No	4	I	Indirect	By 401(k) plan

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	I	Indirect	By 401(k) plan

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	SEP	Disposition	2025-06-03	4,016	$227.96	932	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	I	Direct

Footnotes

Represents the weighted average sale price of $228.9432 rounded to the nearest hundredth. The highest price at which the shares were sold was $228.950 and the lowest price at which theshares were sold was $228.869. 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, fullinformation regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
The transaction constitutes an intra-plan transfer in the Huntington Ingalls Industries, Inc. Saving Plan (the "Plan") from the HII Stock Fund to another investment option. The reporting person's interest in the HII Stock Fund was held in the form of units of interest. The Plan's administrator calculates the number of shares of issuer common stock represented by units in the HII Stock Fund.
The transaction constitutes an intra-plan transfer in the Huntington Ingalls Industries, Inc. Saving Excess Plan (the "SEP") from the HII Stock Fund to another investment option. The reporting person's interest in the HII Stock Fund is held in the form of units of interest. The SEP 's administrator calculates the number of shares of issuer common stock represented by units in the HII Stock Fund.