X0306 4 2018-02-22 0 0001501585 HUNTINGTON INGALLS INDUSTRIES, INC. HII 0001722650 Bilden Philip M. 4101 WASHINGTON AVE. NEWPORT NEWS VA 23607 1 0 0 0 Common Stock 2018-02-22 4 P 0 2000 266.729 A 4200 I By P. Bilden Associates Common Stock 2018-02-22 4 P 0 1000 265.09 A 5200 I By P. Bilden Associates Common Stock 2018-02-22 4 P 0 1000 262.00 A 6200 I By P. Bilden Associates Common Stock 142 D The price shown is the weighted average price at which shares were purchased in multiple sales transactions made pursuant to a single market order. The range of prices for the transactions was $266.59 to $266.76. Upon request by SEC staff, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price. These shares are held by P. Bilden Associates, LLC. Kathy S. Owen, Attorney-in-Fact for Philip M. Bilden 2018-02-23