X0306 4 2015-04-01 0 0001501585 HUNTINGTON INGALLS INDUSTRIES, INC. HII 0001185300 VON DER HEYDEN KARL M 4101 WASHINGTON AVENUE NEWPORT NEWS VA 23607 1 0 0 0 Common Stock 2015-04-01 4 A 0 177 140.63 A 400 D Common Stock 12984.84 I See footnote Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. In accordance with the Plan, after the Reporting Person has received restricted stock units equal to at least five times the cash portion of their annual retainer. The Reporting Person may elect annually to receive and directly own common stock, rather than receiving a credit for restricted stock units. Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors. Kathy S. Owen, Attorney-in-Fact for Karl M. von der Heyden 2015-04-03