HD Hyundai Heavy Industries Co., Ltd.

HD Hyundai Heavy Industries is the Ulsan yard that has delivered more ships than any other in the world, passing 5,000 hulls in November 2025. It sits under HD Korea Shipbuilding and Offshore Engineering inside the wider HD Hyundai group, and it trades on the Korean exchange in its own right. Four business units carry the work. Ulsan is a single site rather than a network of yards, which is unusual at this scale and is why throughput comparisons with rivals rarely translate cleanly. Shipbuilding is by far the largest at roughly seventy percent of sales, covering container ships up to 16,200 TEU with methanol dual fuel machinery, LNG carriers and floating storage units, LPG and ethane carriers, crude oil tankers to 300,000 deadweight, bulk carriers, car carriers, roll-on roll-off and ro-pax vessels, product and chemical tankers, liquefied carbon dioxide carriers, LNG bunkering ships and cable layers.

The Offshore and Energy unit handles fixed platforms, ship shaped and cylindrical FPSOs and floating production systems, and it has moved deliberately into energy transition work with the Hi-FLOAT floating wind foundation in 10, 15 and 18 MW sizes, offshore substation equipment, small modular reactor components and carbon capture systems. It takes projects on a full engineering, procurement, construction, transport, installation and commissioning basis rather than as steelwork alone. Naval and Medium size Ships was formed in December 2025 when the naval division merged with the medium ship division, which is why one unit now covers both frigates and feeder container carriers. The naval side is the primary supplier to the Republic of Korea Navy and Coast Guard. It delivered the first Batch-II Aegis destroyer, Jeongjo the Great, built the Chungnam class FFX Batch-III frigate with its integrated sensor mast and four fixed AESA arrays, handed over the third KSS-III submarine ROKS Shin Chae-ho, and is competing for the six ship KDDX destroyer program.

Engine and Machinery is the part outsiders underrate. HD HHI builds the HiMSEN four stroke medium speed engine under its own name, licence builds two stroke low speed engines for MAN and WinGD, and makes propellers, shafting, rudders, crankshafts, cylinder liners and marine pumps. The same unit sells diesel and modular power plants, emergency generators including nuclear station sets, and the NoNOx selective catalytic reduction system that cuts exhaust nitrogen oxides by up to 95 percent. Alternative fuel engines running on LNG, methanol, ammonia and hydrogen are in development across the range. The yard also built the launch pad infrastructure at the Naro Space Center used by the Naro-1 and Nuri rockets. Aftermarket work on installed engines, spares and retrofits runs through affiliated companies in the same group. Revenue reached 14.5 trillion won in 2024 and headcount runs to about 15,000. The order backlog stretches years out.