Transaction Details

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 the shares 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, full information 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.