Seojin System supplies metal enclosures (equipment housings) and precision machine parts made by machining, die-casting, and welding aluminum and other metals. Based on its IR materials, about 37% of revenue comes from ESS enclosures and structures, about 27% from semiconductor-equipment parts, and about 12% from telecom-equipment enclosures, and a key strength is that, by taking on the metal machining and assembly for its end markets, it can shift volume from one end market to another when one cools. On April 28 and May 18, 2026 it signed back-to-back single-supply contracts, the May one worth ₩187.0 billion for ESS and data-center PCS (17.54% of recent revenue); the Q1 quarterly report filed May 15 showed revenue of ₩280.2 billion (-0.4%) with operating and net losses, and disclosures amending share-pledge agreements involving the largest shareholder recurred. The key point to watch is that demand across ESS, data centers, semiconductors, and telecom end markets is reviving and earnings turned the corner off the bottom with a return to profit in Q4 2025, while the open questions are whether cash flow can cover financing costs given a 314.5% debt ratio and interest coverage of around 1x, and how the disclosures on the largest shareholder's pledged stake and ownership-structure changes get resolved.
At-a-glance assessment financial health · growth · profitability · valuation
- Debt far exceeds equity (debt ratio 314.5%).
- Assets that can be turned to cash within a year fall short of near-term liabilities (current ratio 86.5%).
- Operating profit barely covers the interest bill (interest coverage below 1x).
- The most recent full-year net result was a loss.
- Revenue fell 12.2% year over year (3-year trend: mixed).
- Most recent quarter (Q1 2026) revenue was 0.4% lower than a year earlier.
- ROE is -13.8% (controlling-interest basis). It is below the sector average.
- Operating margin is 0.1%.
- The forward P/E sits above the sector median, reflecting elevated expectations.
Ownership & governance As of 2025-12-31
Largest shareholder Jeon Dong-gyu 25.87% (individual)
Controlling bloc incl. related parties 26.38%
With the controlling bloc holding 26%, control is maintained but the free float is relatively large.
🔎 In-depth analysis
- Seojin System makes money by supplying metal enclosures (metal housings that hold equipment) made by machining, die-casting, and welding aluminum and other metals, along with precision machine parts.
- Based on the company's official IR materials, about 37% of revenue comes from ESS (energy storage systems, which store electricity for later use) enclosures and structures, about 27% from semiconductor-equipment parts, and about 12% from telecom-equipment (base station, data-center, and satellite-antenna) enclosures, with the rest from EV and battery parts and industrial machinery.
- In other words, rather than selling a specific finished product, it takes on the metal machining and assembly for end markets such as ESS, semiconductors, and telecom, so its business grows when end-market investment rises and shrinks when it falls.
- Its core competitiveness lies in the large-scale machining capacity of overseas production bases such as Vietnam, and a strength is that it can shift volume to another end market when one cools.
- Recently, the share of ESS produced on a near-finished-product OEM basis and supplied to global customers has been growing.
- The latest close is ₩41,700 and the market cap is ₩2.7 trillion.
- The price sits below its 20-day line (₩57,802) and below its 60-day line (₩62,052).
- With the price below both its short- and mid-term moving averages, the trend looks subdued.
- The RSI (a supplementary gauge that scores upward versus downward momentum over the past 14 days on a 0-100 scale) is 29.4, near depressed territory.
- The one-month change is -40.2%, the three-month change is -2.1%, and it sits -48.4% below its 52-week high.
- Relative strength versus the KOSDAQ is 91 (on a 1-99 scale, computed from returns versus the index over the past year with more weight on recent performance; higher means stronger than the market).
- Among all stocks, it sits in roughly the top 8% by strength.
- Over the past three months it outpaced the index by 29.1%.
- It is best to read the chart alongside trading volume and disclosure dates.
- Because the company posted a net loss last year (2025), the trailing P/E (how many times last year's earnings the share price is) cannot be calculated.
- But this is a company whose earnings bottomed out over the past year, so the truer picture is the forward view based on this year's recovering earnings rather than the trailing 12-month figure.
- The P/B (how many times net assets the share price is) of 3.62x is above the sector average.
- ROE (how much is earned in a year on equity) is -13.8%, but that is merely a snapshot of the loss-making year 2025 and should not be read as a collapse of the core business.
- The financials do need attention.
- The debt ratio (debt relative to equity) is high at 314.5%, the current ratio (assets that can be turned to cash immediately relative to debt due within a year) is 86.5%, below 100%, and interest coverage is around 1x, so whether cash flow can support the financing costs is the key checkpoint this year.
- In short, if you anchor on last year's loss the metrics look poor, but on this year's basis of reviving earnings the price is only beginning to reflect the recovery, and the financial burden must be checked separately and continuously.
- Revenue grew from ₩606.1 billion in 2021 to ₩1.21 trillion in 2024, then paused with a -12.2% decline to ₩1.07 trillion in 2025 (a steady uptrend, with a five-year revenue CAGR of 15.2%).
- More important is the direction of earnings.
- Operating profit fell from ₩108.7 billion in 2024 to ₩1.1 billion in 2025, and net profit swung to a loss of -₩101.2 billion; the fact that the net loss far exceeded the near-zero operating line means non-operating factors such as financing costs from high debt weighed heavily rather than a collapse of the core business.
- And the direction has already turned.
- In Q4 2025 it returned to a quarterly profit with revenue of ₩310.9 billion and operating profit of ₩23.5 billion (an operating margin of about 7.6%).
- Q1 2026 was back in the red, with revenue of ₩280.2 billion (-0.4% year on year) and an operating loss of -₩33.0 billion, but this is an off-season stretch before large new volume is booked as revenue.
- The basis lies in the order book.
- Large supply contracts followed one after another - ₩270.2 billion of ESS equipment in March (22.26% of revenue) and ₩187.0 billion of ESS and data-center PCS (power conversion systems) in May (17.54% of revenue) - and this volume will be recognized as revenue from Q2 2026 onward.
- With demand for ESS and data-center power structurally growing, and Vietnam and U.S. capacity supporting utilization as it rises, the thin machining margin recovers, so it is natural to view 2026 as the first year of a recovery that passes last year's loss trough and returns earnings.
- Recent disclosures fall into two strands.
- One is a growth signal: single-supply contracts were signed on April 28 and May 18, and the May one in particular, worth ₩187.0 billion for ESS and data-center PCS (17.54% of revenue), shows end-market demand coming back in.
- The other is a set of financial and governance checkpoints: a securities-issuance result (voluntary disclosure) on April 30 confirmed funding activity, and in May-June disclosures amending share-pledge agreements that could entail a change of largest shareholder recurred.
- The Q1 2026 quarterly report filed May 15 confirmed revenue of ₩280.2 billion (-0.4%) with operating and net losses.
- Tracking how quickly the rising orders convert into revenue and profit from the next quarter, and how the stake-pledge and ownership-structure disclosures are resolved, will sharpen the picture.
- The strengths are clear.
- End-market demand toward ESS, data centers, semiconductors, and telecom is reviving; the back-to-back large supply contracts in March-May and the Vietnam and U.S. machining capacity support it; and, above all, the return to profit in Q4 2025 confirmed in the results that earnings have passed the bottom and changed direction.
- Rather than declaring it expensive on last year's loss alone, this is a stock where you should watch how far this year's recovering earnings extend.
- Points to track together are the financials and governance.
- With a debt ratio of 314.5% and interest coverage of around 1x, whether cash flow can cover financing costs, and how the largest shareholder's stake pledge and the ownership-structure changes are resolved, are the variables.
- In one line, it is strong when end-market demand and orders quickly translate into revenue and profit and utilization rises, steepening the earnings recovery; conversely, if the recovery is slow or financing costs and governance events get in the way, the net-profit recovery can lag the operating recovery.
🔎 Valuation vs peers Inconclusive
Based on the business reality of machining metal enclosures and structures for ESS, power, and electrical equipment rather than finished products, it is compared with similarly natured machining and electrical-equipment names whose P/B and ROE are confirmed from on-site data.
| Peer | P/E | P/B | ROE |
|---|---|---|---|
| Shinsung Delta Tech | 35.25x | 3.07x | 8.72% |
| SPG | 174.84x | 6.19x | 3.54% |
(a) Position versus peers: same-natured metal-machining and electrical-equipment names Shinsung Delta Tech (P/B 3.4x, ROE +8.7%) and SPG (P/B 7.0x, ROE +3.5%) are profitable, whereas Seojin System, despite a 2025 loss (ROE -13.8%), trades at a P/B of 4.89x, between the two profitable peers. (b) Premium/discount: that such a P/B was maintained even in a loss-making year can be read as an expectation premium for ESS and data-center growth and an earnings recovery. (c) Limits of trailing metrics and the forward basis: the 2025 net loss means a trailing P/E cannot be derived, and operating profit has passed an inflection point (₩108.7 billion in 2024 to ₩1.1 billion in 2025), so value is hard to gauge from the past year's metrics alone. In fact, the return to profit in Q4 2025 and the large orders make the forward picture of recovering earnings better than the trailing one. Yet even applying our own estimated net profit, the absolute level of the forward multiple is not low, suggesting the market has already priced in much of the recovery, and, layered with variables such as the 314.5% debt ratio, large financing costs, and the largest shareholder's stake pledge, it is hard to pin the valuation in one direction. Because the assessment splits sharply depending on how quickly orders convert to profit and how the financials and governance are resolved, we view it as Inconclusive.
Price history Close · MA20 · MA60
The latest close is ₩41,700 and the market capitalization is ₩2.7 trillion. The price sits below its 20-day moving average (₩57,802) and below its 60-day moving average (₩62,052). It is under both its short- and medium-term moving averages, so the trend looks subdued. The RSI (a supplementary indicator that gauges the strength of gains versus losses over the past 14 days on a 0-100 scale) is 29.4, near oversold territory. The one-month change is -40.2%, the three-month change is -2.1%, and the position relative to the 52-week high is -48.4%. Relative strength versus the KOSDAQ is 91 (on a 1-99 scale, converted from returns against the index over the past year with more weight on recent performance; higher means stronger than the market). It is stronger than roughly 92% of all stocks. Over the past three months it outpaced the index by 29.1%. Chart interpretation is best done alongside trading volume and the dates on which disclosures occur.
Relative performance stock vs index · start = 100
Excess return vs index · 3M +29.06% / 6M +88.39% / 12M +82.74%
Key metrics vs sector median
Valuation
A net loss makes the P/E an unreliable valuation gauge. The P/B of 3.62x is above the sector median (2.15x).
Enterprise value (EV)
EV = market cap + net debt. It reflects cash and debt, so it captures the real cost of the whole business that market cap alone misses; lower multiples are cheaper relative to earnings or sales.
Profitability & financials
Return on equity (ROE) is -13.8%, below the sector average (2.0%). The operating margin is 0.1%. The debt ratio is 314.5%, so the financial structure is somewhat high.
Growth FY2025 · annual report (consolidated)
| Item | 2023 | 2024 | 2025 | YoY |
|---|---|---|---|---|
| Revenue | $516.1M | $804.4M | $706.7M | -12.15% ↓ slower |
| Operating profit | $32.5M | $72.0M | $759,396 | -98.95% ↓ slower |
| Net profit | -$15.0M | $55.8M | -$67.1M | -220.16% |
| 5-year | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Revenue | $401.7M | $522.0M | $516.1M | $804.4M | $706.7M |
| Operating profit | $38.4M | $29.4M | $32.5M | $72.0M | $759,396 |
| Net profit | $25.6M | $1.1M | -$15.0M | $55.8M | -$67.1M |
| Revenue CAGR | 4-yr avg 15.17% | ||||
Revenue fell 12.2% year over year (2023 ₩778.7 billion → 2024 ₩1.2 trillion → 2025 ₩1.1 trillion), and the three-year trend is 'mixed'. The rate of decline widened from the prior year. Operating profit fell 99.0% year over year. The decline widened. Over the 5 years on record, revenue compound annual growth (CAGR) is 15.2%. The two-year revenue CAGR is 17.0%. In the most recent quarter (Q1 2026), revenue was 0.4% lower than the same period a year earlier.
Latest quarterly results Q1 2026 · vs year-ago
Technical indicators
What stands out
- —
Points to watch
- Debt far exceeds equity (debt ratio 314.5%).
- Assets that can be turned to cash within a year fall short of near-term liabilities (current ratio 86.5%).
- The most recent full year was a loss, so it is worth checking whether profitability recovers.
- Revenue fell 12.2% year over year (3-year trend: mixed).
- The price is high versus peers, so expectations already appear priced in.
Recent news & events searched · sourced
- 2026-05-18UpdateSingle-supply contract signed for ESS and data-center PCS (power conversion systems). Contract value about ₩187.0 billion (about 17.54% of recent revenue), contract term 2026-05-18 to 2027-12-31.Recognized as revenue from Q2 2026 onward, a medium-term growth driver underpinning a recovery in scale and earnings. Source
- 2026-04-28UpdateDisclosure of a single-supply contract. Coming within a month of the May contract, the consecutive orders show that end-market demand is continuing.Consecutive orders signal a recovery in scale, but whether the revenue increase feeds straight through to profit needs separate checking given the thin machining margin. Source
- 2026-04-30FilingSecurities-issuance result (voluntary disclosure). The result of a securities issuance related to funding was disclosed.A disclosure to confirm funding activity, a point at which to review the financial structure alongside the already high debt ratio (314.5%). Source
- 2026-05-15EarningsQ1 2026 quarterly report filed. Revenue of ₩280.2 billion (-0.4% year on year), an operating loss of -₩33.0 billion, and a net loss of -₩20.5 billion, an off-season result before large new volume is recognized.A loss in the short term, but it should be viewed alongside the full-year recovery path since the March-May order volume is booked as revenue from Q2 onward. Source
- 2026-06-05UpdateAmended disclosure of a share-pledge agreement that could entail a change of largest shareholder. Over May-June, the major shareholder's stake pledge and large-holding status were repeatedly amended and re-filed.With the largest shareholder's stake tied up as collateral, a governance change is a latent risk if the pledge is enforced, and the repeated disclosure amendments warrant separate checking. Source
Figure cross-check computed ↔ external
Recent filings
- 2026-06-05OwnershipLargest-shareholder ownership change report (amended)
- 2026-06-02OwnershipOwnership-change filing
- 2026-06-02OwnershipLargest-shareholder ownership change report (amended)
- 2026-05-29OwnershipLargest-shareholder ownership change report (amended)
- 2026-05-22OwnershipOwnership-change filing
- 2026-05-21OwnershipLargest-shareholder ownership change report (amended)
- 2026-05-18Single supply/sales contract
- 2026-05-15PeriodicQuarterly report
- 2026-05-12OwnershipOfficers'/major-shareholders' holdings report
- 2026-05-08OwnershipOwnership-change filing
- 2026-05-08OwnershipOfficers'/major-shareholders' holdings report
- 2026-05-08OwnershipOfficers'/major-shareholders' holdings report
📖 Plain-language glossary — expand if you are new to this
- P/E
- How many times a year's net profit the price is worth (lower is cheaper relative to earnings). The P/E here is on trailing (last full-year) results; for companies whose earnings swing fast (memory chips and other cyclicals/high-growth), a forward P/E on this year's expected earnings is more accurate.
- P/B
- Price relative to net assets (equity). Around 1x means it trades near book value; below 1x means below book.
- P/S
- Price relative to a year's revenue — useful for growth companies with thin earnings.
- Net debt / EV
- Net debt = interest-bearing debt − cash. Negative means more cash than debt (net cash). EV (enterprise value) = market cap + net debt, closer to what it would cost to buy the whole business.
- EV/EBIT · EV/EBITDA · EV/Sales
- Enterprise value against operating profit (EBIT), EBITDA, or revenue. Unlike P/E these reflect debt and cash; lower is cheaper relative to earnings power or sales.
- FCF / FCF yield
- Free cash flow = operating cash − capex, the cash actually left over. FCF yield = FCF ÷ market cap; higher means more cash generated per unit of market value.
- Intrinsic value (DCF)
- Future free cash flow (or, for some capex-heavy but profitable names, forecast earnings) discounted to today to estimate per-share value. Because it shifts a lot with the discount-rate and growth assumptions, it is shown as a bear/base/bull range, and the basis and assumptions are disclosed in one line beneath it.
- ROE
- How much profit the company earns in a year on its equity (%). Higher means better returns on capital.
- EPS / BPS
- Earnings per share / net assets (book value) per share.
- Operating / net margin
- Profit left from the core business / final profit after tax and interest, per unit of revenue.
- Debt ratio
- Debt relative to equity (%). Higher means more reliance on borrowing (norms vary by sector).
- Current ratio
- Assets convertible to cash within a year against debt due within a year. Above 100% leaves some short-term headroom.
- Interest coverage
- How many times operating profit covers the interest owed. Below 1x means operating profit alone struggles to cover interest.
- Dividend yield / payout ratio
- The year's dividend as a % of today's price / the share of earnings paid out as dividends.
- Revenue CAGR
- Multi-year growth expressed as a single yearly average (compound annual growth rate).
- RSI (short-term signal)
- Whether recent price action is overheated or beaten down. Above 70 is overbought, below 30 oversold.
- MA20 / MA60 (moving averages)
- The 20- and 60-day average price. Price above them signals a firmer short-term trend.
- vs 52-week high
- How far below the past year's peak the price sits now (%).
All figures are for reference only; how they read varies by sector and over time.
Sources: Korea FSC market-price API (data.go.kr), OpenDART, KRX/KIND — public data only.
Bong Stocks presents public-data-based information for reference only. It is not investment advice and contains no target prices, ratings, or buy/sell recommendations. Verify independently before making any decision.