** Shares of U.S. military shipbuilder Huntington Ingalls Industries HII.N up 3.6% at $426.50 premarket
** Co secures SHIELD IDIQ contract by U.S. Department of Defense's Missile Defense Agency
** Contract carries ceiling of $151 bln; aims to accelerate delivery of homeland defense capabilities
** Work spans cyber ops, microelectronics, spectrum management, training environments, logistics and sustainment
** HII stock more than doubled over the past year
(Reporting by Tharuniyaa Lakshmi in Bengaluru)
((tharuniyaa@thomsonreuters.com))