Huntington Ingalls Industries is America's largest naval shipbuilder and a major defense contractor that designs and builds military ships and submarines for the U.S. Navy and federal government. The company operates three primary business segments: Ingalls Shipbuilding constructs non-nuclear naval vessels including amphibious assault ships and guided-missile destroyers; Newport News Shipbuilding specializes in nuclear-powered aircraft carriers and submarines; and Mission Technologies provides defense systems, cybersecurity, training, and autonomous platforms across military and commercial applications. With approximately 81% of revenue from the U.S. Navy and the remainder from the Coast Guard and other federal agencies, HII generates revenue through fixed-price and cost-plus government contracts, holds exclusive or near-monopoly positions in several key shipbuilding segments, and competes against larger defense contractors and specialized technology firms.