DEEP RESEARCH · TMC
TMC: A Specialty Cable Player at the Intersection of Shipbuilding, Power and Data Infrastructure
A research note on the IPO structure, moat, financial turnaround and North America/optical-cable expansion
0. Bottom line first
TMC appears to have a narrow but deep moat built on marine cable certifications and references. The positives should still be weighed against the confirmed IPO price of KRW 9,300, the 19.2x peer EV/EBITDA framework, copper-price exposure and shipbuilding-cycle risk.
The key idea is to view TMC not only as a shipbuilding-equipment supplier but as a cable company exposed to ship replacement, AI data centers, offshore wind and energy infrastructure. After turning profitable in 2023, the first-half 2025 operating margin improved to 3.8%, while optical-cable revenue reached KRW 20.1 billion in 2024, up 60.5% year over year.
1. Company and portfolio
Official fact: TMC was established on December 29, 2012 through a spin-off of Songhyun Holdings' marine wire and insulated optical-fiber cable business. Its headquarters are in Ipjang-myeon, Seobuk-gu, Cheonan, Chungcheongnam-do. KPF is the largest shareholder with 68.37%.
Interpretation: The KPF parent-subsidiary structure acted as a financial buffer during the 2022 raw-material and liquidity stress, while IPO lock-ups signal management stability.
Marine and offshore cables
Power, control and communication cables for merchant vessels, LNG/LPG carriers, FPSOs and drillships.
Optical-fiber cables
Loose-tube and ribbon products for data-center and network upgrades. 2024 revenue was KRW 20.1 billion, up 60.5% YoY.
Industrial specialty cables
Cables for nuclear plants, mines and railways that partly buffer the shipbuilding cycle.
The 2024 acquisition of Glow One's lighting business also matters because shipyards are overlapping customers, making cross-selling between marine lighting and cables plausible.
2. Industry setup
The current shipbuilding upcycle is led less by China-driven cargo growth and more by environmental regulation. The IMO's 2050 net-zero target pushes owners toward replacement vessels and dual-fuel propulsion. Green ships require more complex power and control systems, and LNG carriers need specialty cables for minus-163-degree environments.
AI data centers are framed as using more than three times the power of ordinary data centers, creating shortages in power-grid and optical-communication infrastructure. TMC's optical-cable business is the main clue that the company can move beyond a traditional shipbuilding-parts image.
3. Moat: certifications and references
Official fact: The source describes TMC as having major classification certifications and marine-cable references, plus fire-resistant and flame-retardant product lines meeting IEC and JIS standards.
Interpretation: Once specified into a vessel design, replacing a supplier creates design-change cost and quality risk for shipyards. That switching cost is the key defense against lower-priced competitors.
| Moat | Content | Investment read |
|---|---|---|
| Regulatory barrier | Classification certifications and marine safety standards | New entrants need years and meaningful cost. |
| Technical focus | Cryogenic, fire-resistant, flame-retardant and offshore products | High-value vessel mix can support price and margin. |
| References | Shipyard and shipowner project experience | Past delivery history is a sales asset. |
4. Financials and IPO
TMC recorded a KRW 669 million operating loss in 2022, then turned profitable in 2023 with KRW 372.2 billion of revenue, KRW 11.9 billion of operating profit and a 3.2% operating margin. The first-half 2025 operating margin improved to 3.8%, and first-half EBITDA was KRW 8.9 billion, implying about KRW 17.8 billion annualized.
| Metric | Value | Meaning |
|---|---|---|
| IPO price | KRW 9,300 | Top of the KRW 8,000-9,300 range |
| Market cap | About KRW 255.2 billion | Based on IPO price |
| Gross proceeds | About KRW 56.7 billion | For facilities and debt repayment |
| Net proceeds | About KRW 38.5 billion | After issuance costs |
| Peer multiple | 19.2x EV/EBITDA | Based on Taihan Cable & Solution and Iljin Electric |
The balance sheet is improving. Debt-to-equity fell from 261.3% at end-2022 to 184.2% at first-half 2025, while total borrowings declined by about KRW 36.0 billion from KRW 114.5 billion to KRW 78.5 billion. Borrowing dependence improved by 10.7 percentage points from 48.1% to 37.4%.
5. Strategy and risks
IPO proceeds are planned for TMC Texas facilities, replacement of aging domestic equipment, debt repayment, raw-material purchases and R&D. The North American investment is a response to Buy America-style policy and rising U.S. data-center demand.
- Visible revenue and orders from TMC Texas
- Expansion of optical-cable revenue share
- Copper-price pass-through and margin defense
- A conservative read on valuation given the exclusion of Gaon Cable from peers
The largest risk remains shipbuilding cyclicality. Copper also accounts for more than 70% of wire manufacturing cost, so lagging pass-through can pressure short-term margins even with escalation clauses.
6. My watch list
TMC combines verified technology, favorable end markets and a financial turnaround. I would keep the IPO valuation, shipbuilding exposure, raw-material prices and post-listing float in view. If North America and optical cables become visible, the rerating case from shipbuilding-equipment supplier to infrastructure-solutions company becomes stronger.
Sources
- Naver Blog original: https://m.blog.naver.com/PostView.naver?blogId=star_of_self&logNo=224098314568
- Cable industry report: https://drive.google.com/open?id=15ZhICpCH7ObJ6dF_vHYBCGunD3TYznhr
- CS Wind 3Q25 analysis: https://drive.google.com/open?id=1cnStAfCwKc1RiTUcFeRF-eqSBxxy-jMlxqf-Sb09Mgc
- Englewood Lab moat comparison: https://drive.google.com/open?id=1Q9NVD01GBxug0vdY96QLOCmd6eYWMswf0ubmlTXDB2o
- Korea IPO Market September 2025: https://drive.google.com/open?id=1MbNpZ9g3645MUK1tWt5edUP71--mKcId