South Korea's two biggest shipbuilding groups reported sharply higher third-quarter operating profits last week as expensive liquefied natural gas carriers moved through their yards. HD Korea Shipbuilding & Offshore Engineering (KSOE) said operating profit rose 37.3% from a year earlier to 1.45 trillion won, and Hanwha Ocean said its operating profit climbed 67.6% to 485.7 billion won. Defense contractor Hanwha Aerospace went the other way: it swung to a net loss after howitzer shipments to Poland slipped.

The split matters for investors across Asia who have treated Korean shipbuilding and defense as a single trade since 2024. The quarter showed the two halves now run on different clocks. Shipyards are booking ships ordered at higher prices two years ago, so margins keep widening. Arms makers book revenue only when finished weapons are handed over, so a single delayed delivery can erase a quarter.

HD KSOE and Hanwha Ocean ride pricier ships

KSOE, the shipbuilding holding company of HD Hyundai, posted revenue of 8.29 trillion won for July through September, up 9.3% from a year earlier, according to Baird Maritime's report on the results. Its operating margin reached 17.5%, 3.6 percentage points higher than a year before. Through nine months, operating profit totaled 4.45 trillion won, already above the full-year record of 3.9 trillion won set in 2025.

The quarter was weaker than the second. Operating profit fell 12% from April through June, and the group blamed fewer working days, a stronger won and one-off costs from a wage settlement at HD Hyundai Heavy Industries, finalized on Oct. 27. About three quarters of the added labor costs landed in the third quarter, with the rest due in the fourth. Net income fell 11.4% to 777 billion won, dragged down by 610.2 billion won in foreign-exchange losses.

Orders are not the problem. KSOE had won 176 vessels worth $19.1 billion by the end of September, already more than its full-year target, and it said it holds more than half of global orders for very large gas carriers and very large ammonia carriers. Its engine unit, HD Hyundai Marine Engine, posted a record 28.5% operating margin, and the group said onshore power-generation engine capacity is nearly sold out for 2028 and 2029.

Hanwha Ocean's numbers told a similar story with a sharper twist. Revenue rose 12.9% to 3.41 trillion won, and the operating margin widened to 14.2% from 9.6% a year earlier, The Korea Herald reported. Commercial shipbuilding earned 471.8 billion won, up 54%, on high-priced LNG carriers and ships contracted at better rates. Its energy plant unit returned to a 91.4 billion won profit on change orders for floating production vessels and drillship leasing income.

The weak spot was naval work. The division lost 70.6 billion won, compared with a small profit a year earlier, which the company attributed to fixed costs and higher estimated costs on certain projects. Net income fell 46.1% to 145.1 billion won, down from 269.4 billion won a year earlier, according to Yonhap.

Hanwha Aerospace pays for the Poland delay

Hanwha Aerospace reported a third-quarter net loss of 36.7 billion won on Oct. 29, compared with a 699 billion won profit a year earlier, Yonhap reported. Operating profit fell 46.2% to 452 billion won and revenue slipped 6% to 6.09 trillion won.

The company blamed the drop partly on timing, along with one-off costs. Deliveries of K9 self-propelled howitzers to Poland were pushed into the fourth quarter, and some shipments that would normally have fallen in the third quarter were completed early, in the second. Its aerospace division also lost money as higher deliveries of geared turbofan engines added to losses under its revenue-sharing partnership with Pratt & Whitney. The ground defense business earned only 21.7 billion won on revenue of 1.24 trillion won.

The order book still gives the company a cushion. Hanwha Aerospace ended September with a 35 trillion won backlog and said it expects earnings to recover in the fourth quarter as it ships K9 howitzers and Chunmoo rocket launchers to Poland and moves ahead with K9 programs in Egypt and Australia.

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Both industries sell largely to overseas buyers and report in won, so the currency remains a swing factor. KSOE and Hanwha Ocean each cited exchange rates as a drag in the quarter, at a time when the economy grew 1% in the third quarter on chip exports. KSOE has also warned of rising global shipyard capacity as a longer-term risk to pricing.

For the shipyards, the fourth quarter brings the remaining wage-deal costs at HD Hyundai Heavy and the wind-down of KSOE's Trion offshore project, which the group expects to reduce offshore revenue. Hanwha Ocean has said it will press for contract adjustments to lift naval margins while speeding up domestic submarine and frigate projects. For Hanwha Aerospace, the test is simpler: whether the delayed K9 and Chunmoo units reach Poland before Dec. 31 and land in fourth-quarter revenue.