X0306 4 2016-03-03 0 0001501585 HUNTINGTON INGALLS INDUSTRIES, INC. HII 0001594313 Cuccias Brian J. 4101 WASHINGTON AVENUE NEWPORT NEWS VA 23607 0 1 0 0 Corp. VP & President, Ingalls Common Stock 2016-03-03 4 F 0 3931 132.81 D 44682 D SEP Unit Common Stock 71.467 301.9822 D The issuer's outside administrator for the issuer's Savings Excess Plan holds issuer stock in a pooled fund as a participant investment option. Participant contributions designated for investment in issuer common stock are accounted for as units of interest in the issuer stock fund. Each unit was valued at $30.02139 as of December 31, 2015. The unit value can fluctuate with fluctuations in the value of the issuer common stock and the daily cash position of the issuer stock fund. The number of shares of issuer stock attributable to the reporting person can be determined at any time by first multiplying the number of units in the reporting person's account by the then current unit price and dividing the total by the price of the issuer common stock. As of December 31, 2015, the reporting person held an equivalent of 72.430587 shares in the issuer Savings Excess Plan. The Savings Excess plan is a "Non-Qualified Plan" as defined in 16b-3(b)(2). Kathy S. Owen, Attorney-in-Fact for Brian J. Cuccias 2016-03-04