Hyundai Heavy Industries Co., Ltd. (HHI) is a shipbuilding company based in South Korea. It is the world's largest shipbuilding company, accounting for 15% of the world's shipbuilding market share in 2015. The company was founded in 1972 and has since expanded into other industries such as offshore engineering, industrial plant and engineering, and engine and machinery. HHI has built a wide range of vessels including container ships, oil tankers, and submarines. The company has faced financial difficulties in recent years due to a decline in the global shipbuilding industry, but has been working to restructure and diversify its business.