THN (019180): A 63-Fold Jump in Operating Profit — So Why Does the Market Pay Only 1.4x?
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※ Prices and market capitalisation as of 2026-07-20. Financial figures are cited from DART disclosures (Korea’s mandatory electronic disclosure system, consolidated basis) together with their sources.
A single car contains tens of kilogrammes of bundled wiring. From the battery to the headlamps, from sensors to controllers — the path every electrical signal in a car travels is called a wire harness. THN makes those wiring bundles. It is not a glamorous component, but as vehicles become more electronic, both the volume and the unit price of the wiring that goes into each car rise.
The recent numbers at this quiet component maker are anything but quiet. Revenue of KRW 989.1bn in 2025 (+52%), operating profit of KRW 70.1bn (+126%). A company whose total equity was KRW 87.7bn four years ago has swollen to KRW 248.0bn (Q1 2026). Yet its market capitalisation is about KRW 98.6bn (closing price of KRW 5,480 on 2026-07-20 × 18 million shares) — 0.4x equity, and 1.4x last year’s operating profit. The share price has been pushed down from last year’s high of KRW 9,680 to KRW 5,480.
This piece asks one question. Was the 2025 jump a one-off, or a structural change? We set numerical thresholds to test the answer, and start tracking from the half-year report in August.
How it makes money — wire harnesses, and nothing else
The business is simple. It is a single product line, automotive wire harnesses, and of the KRW 982.6bn in product revenue in 2025, exports were KRW 587.5bn and domestic sales KRW 395.1bn (revenue by type, 40th fiscal year annual report). The engine of growth is exports — export revenue grew 52% in a single year, from KRW 387.3bn in the 39th fiscal year to KRW 587.5bn in the 40th, and pulled the whole company’s growth with it.
| Product revenue (KRW bn) | 38th FY (2023) | 39th FY (2024) | 40th FY (2025) |
|---|---|---|---|
| Exports | 386.7 | 387.3 | 587.5 |
| Domestic | 174.4 | 241.9 | 395.1 |
Source: DART, 40th fiscal year annual report, “revenue by type” (service revenue excluded)
Wire harness production involves a great deal of labour-intensive work, so results hinge on the cost competitiveness of overseas production bases and on the order volumes of carmaker customers. Breaking down which customers, models and regions drove this growth is the pressure point to track in the half-year report (banyeon bogoseo, filed within 45 days of the H1 close). Governance is founder-led: Lee Kwang-yeon and related parties hold about 41% (Lee Kwang-yeon 20.9%, Chae Chul 20.5% and others).
Market structure — an oligopoly of three inside the Hyundai chain
The company set out the competitive landscape of this business in its own annual report. There are an estimated 100 or so companies producing wire harnesses in Korea, but Hyundai Motor has only three tier-one suppliers, and THN is one of them (“market share”, 40th fiscal year annual report). The product may look like one with low barriers to entry, but a tier-one carmaker slot is an oligopoly built on an accumulated record of quality certification, joint development and following the customer overseas.
At the same time, that structure means this company’s fate is tied to Hyundai Motor Group’s production volumes and model strategy. A wire harness is a made-to-order part designed differently for every model, so orders are results; and because the volume and unit price of wiring rise as vehicles shift to electric and hybrid powertrains, which models it goes into determines the quality of its growth. With so much labour-intensive work, the operating efficiency of low-wage overseas production bases also drives the margin — the collapse of operating profit to KRW 1.1bn in 2022 and the recovery to a 7.1% margin in 2025 were both combinations of those two variables, volume and cost.
Five years of numbers — through the valley of death, then a jump
| Consolidated (KRW bn) | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Revenue | 402.7 | 469.7 | 586.3 | 651.1 | 989.1 |
| Operating profit | 19.8 | 1.1 | 43.1 | 31.0 | 70.1 |
| Net profit | 16.8 | −6.3 | 27.6 | 33.5 | 68.7 |
| Operating margin | 4.9% | 0.2% | 7.4% | 4.8% | 7.1% |
| Operating cash flow | −0.8 | 29.9 | 44.7 | 33.9 | 72.1 |
Source: DART fnlttSinglAcntAll (corp 00118965, annual report 11011, consolidated)
2022 was the floor. Operating profit of KRW 1.1bn and a net loss of KRW 6.3bn — the year raw material and logistics costs were crushing component makers. From there, in three years, revenue became 2.1x and operating profit 63x. Total equity rose from KRW 87.7bn (2021) to KRW 248.0bn (Q1 2026), and in 2025 operating cash flow of KRW 72.1bn confirmed that cash moved in the same direction as profit. Which is to say the quality of earnings is not bad.
Pressure point ① — the quarterly path: momentum from the jump, and a first deceleration
Broken out by quarter, 2025 was an acceleration from start to finish. KRW 3.4bn (Q1) → KRW 17.4bn → KRW 21.6bn → KRW 27.7bn (Q4). Then KRW 17.5bn in Q1 2026 — 5.1x the year-earlier quarter (KRW 3.4bn) and still high, but down from the preceding quarter (KRW 27.7bn). Revenue of KRW 276.3bn was +62% year on year, but a deceleration against Q4.
For an earnings-driven case, this is the fork in the road. If Q4 2025 was a temporary peak (year-end settlement, volumes bunching up) and KRW 17.5bn is the new cruising altitude, the annual pace of KRW 70bn holds. If, on the other hand, the deceleration is the trend, 2025 ends as “one jump”. Operating cash flow of −KRW 10.5bn in Q1 (on rising working capital) is another item to watch for resolution in the half-year figures.
Pressure point ② — a 171% debt-to-equity ratio and a thin dividend
The financial structure is unlike that of an asset play. At the end of 2025: assets of KRW 613.1bn, liabilities of KRW 386.9bn, equity of KRW 226.2bn — a debt-to-equity ratio of 171%, a company that funds growth with working capital and borrowings (short-term borrowings of KRW 69.3bn as of Q3 2025, among others). That is a natural structure for a component maker in a growth phase, but the cushion against interest rates and swings in volume is thinner than at an asset play.
The pace at which equity is accumulating also deserves attention. Total equity of KRW 87.7bn in 2021 has become KRW 248.0bn in four years — 2.8x — even after passing through the loss-making year of 2022, and it was built purely from retained earnings, with no share issuance. Over that period the share count stayed at 18 million, so book value per share rose from KRW 4,872 to KRW 13,778, while the share price is KRW 5,480.
The dividend was raised from KRW 60 per share (2023) to KRW 60 and then KRW 120 (2025), but the payout ratio is just 3.1%. In effect 97% of what it earns is piled up inside the company, and whether that retention flows into capacity expansion and debt repayment to keep growth alive, or simply accumulates, is a matter to watch alongside the returns policy.
The share price rode the earnings jump to KRW 9,680 last year before being pushed back to KRW 5,480. This is a price at which the market has already discounted the 2025 results as a one-off — a market capitalisation of KRW 98.6bn is 1.4x 2025 operating profit and about 1.4x annualised Q1 2026 earnings. If continuity is confirmed, that discount becomes the problem; if confirmation fails, the discount is justified.
Core scenario — the continuity of growth
This is the proposition this piece will test every quarter. The thresholds are set in advance and are not moved after the fact.
“The 2025 jump (revenue +52%, operating profit +126%) is not a one-off but a structural change — an annual pace of KRW 70bn in profit continues through 2026.”
- Numerical threshold: cumulative H1 2026 operating profit of KRW 35.0bn or more (Q2 alone at KRW 17.5bn+, an annual pace of KRW 70bn), and H1 revenue of KRW 550.0bn or more
- Supporting checks: H1 operating cash flow turning positive (resolving the −KRW 10.5bn of Q1), and continued growth in export revenue
- Disconfirming condition: H1 operating profit below KRW 25.0bn, or revenue in decline — in which case 2025 is recorded as a one-off jump
- Confirming data: the half-year report in mid-August
The bull case
① Price. A market capitalisation of KRW 98.6bn = 0.40x equity and 1.4x 2025 operating profit. Even if only half the growth holds, that is an undemanding multiple.
② Substance behind the growth. Revenue, profit and cash flow (operating cash flow of KRW 72.1bn) all confirm growth in the same direction. Exports are the driver, so dependence on the domestic economy is relatively low.
③ The tailwind of vehicle electronics. As electronic content in vehicles increases, both the harness volume per car and its unit price rise — a structural direction.
④ A proven floor. This is a company that has recovered from an operating profit floor of KRW 1.1bn in 2022, so its path through cost pass-through and volume recovery is empirically demonstrated.
The bear case
① The possible start of a deceleration. Q1 2026 operating profit of KRW 17.5bn is a step down from KRW 27.7bn in the preceding quarter. If Q4 2025 was the peak, the KRW 70bn annual proposition breaks.
② A 171% debt-to-equity ratio. If growth stops, working capital and borrowing costs eat into profit immediately. This is a balance sheet with a thin cushion.
③ A single product and customer concentration. A company that earns from wire harnesses alone is fully exposed to carmaker volumes and model changes. The detail of its customer mix can only be confirmed to a limited extent from disclosures.
④ The absence of returns. A payout ratio of 3.1% — the channel through which profit reaches shareholders is still narrow. For retention to be justified as reinvestment in growth, that growth has to keep proving itself.
What to watch next quarter (August 2026)
| Timing | What to check | Condition to keep the case |
|---|---|---|
| Mid-August (half-year report) | H1 revenue and operating profit | Operating profit KRW 35.0bn+ / revenue KRW 550.0bn+ |
| Mid-August (half-year report) | Operating cash flow and export revenue | Operating cash flow turning positive, exports still growing |
| Ad hoc | Disclosures on capacity expansion, orders and dividends | Signals of reinvestment in growth or expanded returns |
One thing to add: as of today this stock is also in the final candidate pool of our overlooked small caps screening funnel — one of the 207 that passed six layers covering the market-cap window, trading value, profitability and valuation (see the methodology piece). This article is what happens when a person reads a machine-selected candidate and turns it into a proposition.
The outcome is reflected in the stock tracking ledger. Its status on first entry is ⚪ (first update pending). The full schedule for this season is in the earnings season preview.
Three-line summary
One. A single-product wire harness maker delivered a jump of +52% in revenue and +126% in operating profit (KRW 70.1bn) in 2025, pulled by exports (+52%). Two. A market capitalisation of KRW 98.6bn is 0.4x equity and 1.4x last year’s operating profit — a price at which the market has already discounted the jump as a one-off. Three. The test is the August half-year report: H1 operating profit of KRW 35.0bn (an annual pace of KRW 70bn) is the threshold, and below KRW 25.0bn we record it as a one-off. The result stays as it is in stock tracking.
Sources and notices
Sources for figures: DART electronic disclosures (annual and quarterly reports, corp 00118965) and KRX prices. Prices as of 2026-07-20. Figures may differ after the time of writing (July 2026).
This article is for information purposes and is not a recommendation to buy or sell any particular stock. It does not address target prices or trading timing.
Further reading: how to read financial statements · how to read the cash flow statement · the traps in P/E and P/B · the overlooked small caps screening methodology
Update log
- 2026-08-15 — FY2026 half-year update — The FY2026 half-year report was filed on 14 August 2026 (receipt 20260814002540). Its financial statements have not yet appeared in the DART financial API — neither the full nor the summary endpoint returns data, on either a consolidated or a separate basis — so no half-year figures are recorded in this update. Nothing has been substituted for them; the reading against the threshold (cumulative half-year operating profit of KRW 35bn+ and revenue of KRW 550bn+ (counter-condition: operating profit below KRW 25bn or revenue shrinking)) will be added to this log once the data appears. Status: awaiting data. → the half-year report · Stock Tracking
- 2026-08-15 — Each company covered here now has its own filing-traceable data page: price-to-book against total equity and against the owners’ share, five years of revenue, profit, equity and net cash, and the dividend, treasury and cancellation record — every figure beside the DART receipt it was read from. → THN (019180)
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