Korea Shipbuilding & Repairs Report Interpretation

Overview

The report examines how HD Hyundai Heavy Industries’ planned expansion of medium-speed engine capacity can address rising land-based power demand, especially from AI data centers, while expanding the longer-term service opportunity for HD Hyundai Marine Solution. J.P. Morgan argues that the projects add durable growth engines and reiterates Overweight on both companies.

Core views

HD Hyundai Heavy Industries (HHI) is pursuing a substantial expansion of medium-speed four-stroke engine capacity. It has secured a 214,500-square-meter site and plans a 165,000-square-meter new plant, with W833.6B of capital expenditure. Construction is targeted for completion in May 2028 and operations from June 2028. The expansion would lift total engine capacity to 7.2GW from 3GW, comprising 4GW for power plants and 3.2GW for marine engines, compared with current capacity of 0.7GW and 2.3GW, respectively. Management expects only about 30% utilization in 2028 because commissioning and equipment setup will constrain initial output, with full run-rate targeted around 2030. The report’s central demand case is land-based power generation, led largely by U.S. AI data-center demand. Management cited rising inquiries and said discussions have advanced beyond the previously referenced roughly 3-9GW of non-binding inquiries. It characterized AI data-center demand as 80-90% U.S.-led. Recent inquiries were split approximately 50:50 to 60:40 between AI data centers and broader land-power needs, while interest in FDC is increasing. HHI also retains potential capacity upside: its secured land could allow a further roughly 23% increase if demand strengthens. For HHI, J.P. Morgan estimates that the incremental 4GW could generate W3.2-W3.6T in annual sales and W1.3-W1.4T in operating profit at full utilization, based on a 40% operating margin. The limited 2028 utilization after the plant’s completion could nevertheless lift the institution’s 2028 operating-profit estimate by 8%. Total engine sales and operating profit could approach W10T and W3T by 2030, versus W3.8T and W693B in 2025. HHI also plans W239B of investment in SMR facilities aligned with the TerraPower framework, intended to produce two Natrium reactor units annually; management has yet to provide details on the associated sales and earnings opportunity. For HD Hyundai Marine Solution (HMS), the capacity build-out expands the engine maintenance, repair and overhaul opportunity. J.P. Morgan raises its 2028E-2036E estimate for data-center engine MRO sales and operating-profit contribution to W4.0T and W1.6T, respectively, from W1.2T and W490B previously. The revised estimate assumes HHI utilization ramps from 30% in 2028E to 50% in 2029E and 100% in 2030E, equivalent to 1.2GW, 2.0GW and 4.0GW of output, or 50, 90 and 180 units. The report retains its MRO value-per-engine and 40% operating-margin assumptions, and consequently raises HMS’s 2028-30 operating-profit estimates by 1%-14% to W634B, W830B and W1.1T. J.P. Morgan concludes that these new capacity and service engines support a more sustainable earnings-growth trajectory for both companies.

Analysis framework

J.P. Morgan links HHI’s announced capacity, construction schedule and expected utilization ramp to potential engine sales and operating profit using a 40% operating-margin assumption. It then translates the projected engine-output ramp into HMS data-center engine MRO demand, retaining its existing MRO value-per-engine and margin assumptions while revising earnings estimates.

Methodology notes

• Industry AnalysisSupply-demand framework

  Capacity expansion matched against AI data-center and wider land-power engine demand.

  The report assesses whether new HHI engine capacity can be absorbed by cited customer inquiries and then estimates the resulting revenue and operating-profit contribution.

• Industry AnalysisUpstream-Midstream-Downstream Transmission

  Engine production growth transmitting into maintenance, repair and overhaul demand for HMS.

  HHI’s planned engine-output ramp is used to estimate the downstream MRO sales and profit contribution for HMS.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• HD Hyundai Heavy Industries (329180.KS)

  Primary beneficiary of expanded power-plant and marine-engine capacity serving land-power demand, including AI data centers.

  Strengths

  Planned 4GW incremental capacity, secured land for potential further expansion, and rising demand inquiries.

  Weaknesses

  2028 output is expected to be limited to about 30% utilization during commissioning and setup.

  Comparison

  Projected total engine sales and operating profit could approach W10T and W3T by 2030 versus W3.8T and W693B in 2025.

  Risks

  Realization depends on demand strength, construction completion, commissioning and the utilization ramp.

• HD Hyundai Marine Solution (443060.KS)

  Benefits from maintenance, repair and overhaul demand associated with expanding HHI data-center engine output.

  Strengths

  Revised 2028E-2036E data-center engine MRO contribution rises to W4.0T in sales and W1.6T in operating profit.

  Weaknesses

  MRO estimates depend on HHI’s output and utilization ramp.

  Comparison

  The revised MRO contribution is less than three times higher than the prior W1.2T sales and W490B operating-profit estimate.

  Risks

  Expected earnings uplift depends on the assumed 30%/50%/100% utilization ramp during 2028E-30E.

Key data

• HHI new-plant capexW833.6BInvestment for a 165,000-square-meter engine plant on a secured 214,500-square-meter site.
• HHI total engine capacity7.2GW from 3GWPost-expansion capacity: 4GW power plants and 3.2GW marine engines.
• Initial utilization~30% in 2028Management guidance reflecting commissioning and equipment setup after expected May 2028 construction completion.
• HHI full-utilization annual contributionW3.2-W3.6T sales; W1.3-W1.4T operating profitJ.P. Morgan estimate based on a 40% operating margin.
• HHI 2030 engine resultsClose to W10T sales / W3T operating profitCompared with W3.8T sales and W693B operating profit in 2025.
• HMS 2028E-2036E data-center engine MRO contributionW4.0T sales; W1.6T operating profitRevised from W1.2T and W490B, respectively.
• HMS 2028-30 operating-profit estimatesW634B / W830B / W1.1TRaised by 1%-14% following the revised engine-output ramp.

Impact & implications

The report argues that HHI’s power-engine expansion can materially enlarge its earnings base if demand converts and utilization reaches full run-rate, while the associated installed base can materially broaden HMS’s engine MRO opportunity. The SMR investment represents an additional potential growth avenue, although sales and earnings details have not yet been provided.

What to watch

• Progress toward the planned May 2028 construction completion and June 2028 start of operations for HHI’s new engine plant.
• Whether engine utilization ramps from roughly 30% in 2028 toward full run-rate around 2030.
• Conversion of AI data-center and broader land-power inquiries into demand, particularly in the U.S.-led market.
• Management disclosure on sales and earnings opportunities from the W239B SMR investment and planned Natrium reactor production.