PER, EPS, PBR and BPS are calculated in-house from the last 4 quarters (2025Q3–2026Q2) · Dividend yield is based on ₩150 per share · Prices as of the 2026-10-02 close
Revenue has grown for four straight years and the company posted its first annual operating profit in five years in 2025, but operating losses returned in three of the last four quarters, leaving the durability of the profit recovery unconfirmed.
2025 revenue reached KRW 164.5bn (+19.5% YoY) with operating profit of KRW 5.0bn, the first annual operating profit since 2020
Operating losses returned in three of the last four quarters (2025Q4, 2026Q1, 2026Q2 within the 2025Q3-2026Q2 window)
General facilities (about 86% of revenue) is the cash cow while Hi-tech (about 14%) tracks the semiconductor capex cycle
New orders such as the Naver Sejong data center (KRW 24.85bn) and DB HiTek Sangwoo campus (KRW 12.2bn) are expanding the pipeline
KRX flagged the stock for minority-account trading concentration in July 2026, warranting attention to liquidity and volatility
Woojin I&S was founded in 1975 and listed on the KOSPI in 2018 as a mechanical facilities specialty contractor, with its business split between Hi-tech and General Facilities.
The General Facilities segment installs water supply and drainage, HVAC, fire protection, and gas systems in apartments, offices, hotels, hospitals, and data centers, and accounted for about 86% of revenue as of the second quarter of 2026, making it the company's cash cow.
The Hi-tech segment manufactures and supplies fluororesin-coated ducts and thick-film line piping for semiconductor and display fabs from its Cheonan plant, contributing about 14% of revenue on the same basis.
The company installs facilities in buildings through general contractors, with Lotte Construction representing a relatively larger share of revenue than other builders.
More recently, in response to growing data center construction driven by AI infrastructure expansion, the company has been building out its competitiveness in IDC-specific HVAC and facility systems such as precision air conditioning, power distribution, high-efficiency pumps, clean-agent fire suppression, and cooling towers, and already holds a number of IDC project track records related to Samsung SDS and KT.
The semiconductor-related business used to generate large revenue from Samsung Electronics and SK Hynix, but transactions with Samsung Electronics have declined sharply in recent years, and in 2024 the Hi-tech segment's revenue share shrank to just 2% of the total amid a pause in semiconductor investment.
In 2025, the company's construction capability rating for the mechanical facilities and gas construction category stood at KRW 123.1bn, ranking 47th among roughly 10,000 companies, a marked decline from a top-10 ranking in earlier years.
| Quarter | Revenue | Operating profit | Op. margin |
|---|---|---|---|
| 2025Q2 | ₩41.4B | ₩4B | 9.6% |
| 2025Q3 | ₩51.1B | ₩6B | 11.8% |
| 2025Q4 | ₩41.9B | -₩1B | −2.4% |
| 2026Q1 | ₩48.1B | -₩2.1B | −4.5% |
| 2026Q2 | ₩60.5B | -₩1.9B | −3.1% |
| Year | Revenue | Operating profit | Net income (parent) | Op. margin | ROE | Debt-to-equity |
|---|---|---|---|---|---|---|
| 2022 | ₩84B | -₩5.6B | -₩3.3B | −6.7% | −3.6% | 19.3% |
| 2023 | ₩100.2B | -₩3.3B | ₩1.9B | −3.3% | 2.0% | 18.7% |
| 2024 | ₩137.6B | -₩17.9B | -₩22.2B | −13.0% | −30.4% | 25.8% |
| 2025 | ₩164.5B | ₩5B | ₩7.6B | 3.0% | 9.4% | 31.6% |
Consolidated basis (financial statements including subsidiaries) · Final figures from DART filings · Net income attributable to owners of the parent · Data as of 2026-08-23
2025 consolidated revenue was KRW 164.46bn, up 19.5% from KRW 137.59bn in 2024, and operating profit turned positive at KRW 4.98bn versus an operating loss of KRW 17.86bn in 2024. Net income attributable to owners also swung to KRW 7.59bn from a large net loss of KRW 22.17bn in 2024.
However, operating cash flow was only KRW 66mn, far below the reported net profit, suggesting that growth-related increases in inventory and unbilled construction assets absorbed much of the cash generated.
In 2023 the company posted a net profit of KRW 1.94bn despite an operating loss of KRW 3.32bn, while 2022 saw both an operating loss (KRW 5.61bn) and a net loss (KRW 3.33bn), underscoring how volatile results have been across segments and cycles over the past four years.
On a quarterly basis, the third quarter of 2025 was the strongest in the recent window, with revenue of KRW 51.06bn and operating profit of KRW 6.04bn, but the company then posted operating losses of KRW 1.01bn in the fourth quarter of 2025 and KRW 2.15bn in the first quarter of 2026, two consecutive loss-making quarters.
In the second quarter of 2026, revenue hit a quarterly record of KRW 60.53bn yet the operating loss persisted at KRW 1.86bn, while net income attributable to owners was a modest KRW 660mn, likely reflecting non-operating items.
In other words, operating losses occurred in three of the last four quarters (2025Q3 through 2026Q2), showing that revenue growth has not yet translated consistently into profitability improvement.
The building mechanical facilities installation industry that Woojin I&S operates in is an order-driven business heavily dependent on the capex cycles of downstream industries.
The Hi-tech segment is directly tied to semiconductor and display fab investment; its revenue share shrank to 2% in 2024 amid a pause in semiconductor capex, before Samsung and SK Group companies resumed investment in 2025, leading to a partial resumption of Hi-tech equipment deliveries to SK Hynix.
The General Facilities segment continues to serve traditional demand from apartments, offices, and hospitals, while the recent boom in data center (IDC) construction driven by AI infrastructure expansion has emerged as a new growth pillar.
IDCs are a specialized market requiring precise air-conditioning systems such as precision temperature and humidity control, and the company is concentrating its sales efforts there, building on its Samsung SDS- and KT-related project track record.
The coated-duct segment of the Hi-tech business is reported to be a market with relatively few competitors, though the market-share data available dates back to 2018 and may not reflect the current competitive landscape.
In contrast, the General Facilities market has roughly 100 competing firms, implying comparatively lower barriers to entry. The company's construction capability ranking in the mechanical facilities and gas construction category stands at 47th, indicating a gap versus larger peers at the top of the industry.
In April 2026, Woojin I&S signed a mechanical facilities contract with Xi C&A for phases 2-3 of the Naver Sejong data center project worth KRW 24.85bn (15.11% of 2025 revenue), running from April 2026 to February 2028.
In May, the company signed a KRW 11.9bn contract with SK Ecoplant (7.22% of revenue) for temporary facilities and fire-protection work at the Yongin semiconductor cluster's Phase 1 Ph-4 IBL fab, extending its exposure to semiconductor cluster construction.
In August, it secured a new Hi-tech order by signing an air-conditioning piping contract for the 'DB HiTek Sangwoo Campus South Fab Phase-2' project with DB World Construction.
The company also signed a 2026-2028 contract with Cheongna Energy for consumer-connection heat transport piping, further broadening its order pipeline in data center and energy infrastructure.
Management expects demand for fluorine-coated ducts and thick-film lining piping to increase on the back of SK Hynix's Cheongju facility expansion and the new Yongin semiconductor cluster, and is also pursuing diversification into coating for secondary-battery mixing tanks.
However, the Hi-tech segment's business with Samsung Electronics is reported to remain well below prior levels, meaning the pace and breadth of any semiconductor capex cycle recovery remain a key variable to watch for future earnings.
The stock trades at a discount to net asset value, and the multiple the market assigns appears to reflect much of the earnings volatility seen in recent years.
Given that the company posted net losses in two of the three years from 2022 to 2024, the mixed pattern of a 2025 swing to profit followed by renewed operating losses in recent quarters continues to shape how the market approaches its valuation.
Dividends have been paid consistently each year, but the yield level is understood to trail the average for larger construction and facilities peers in the sector. The liquidity constraints typical of a small-cap stock are also worth considering.
Ultimately, valuation is likely to hinge on two variables: how quickly the Hi-tech segment recovers alongside the semiconductor capex cycle, and how well the General Facilities segment manages costs to convert revenue growth into margin improvement.
PER, EPS, PBR and BPS are all calculated in-house (the same method as Naver and Toss) · Dividend yield = cash dividend per share from DART filings (supplemented by KRX) ÷ current price · As of 2026-08-23
As AI-driven infrastructure spending fuels data center construction, Woojin I&S has leveraged its competitiveness in IDC-specific mechanical systems such as precision air-conditioning, power distribution, clean-agent fire suppression, and cooling towers to win large contracts including the Naver Sejong data center (KRW 24.85bn).
Its existing track record on Samsung SDS- and KT-related IDC projects could serve as a foundation for further order wins.
The Hi-tech segment's revenue share had fallen to just 2% in 2024 amid a pause in semiconductor investment, but Hi-tech equipment deliveries to SK Hynix partially resumed from 2025, and a new KRW 12.2bn order for air-conditioning piping at the DB HiTek Sangwoo campus in August 2026 points to a nascent recovery in the semiconductor-related business.
Revenue grew for four consecutive years, from KRW 84.0bn in 2022 to KRW 164.5bn in 2025, and the company posted its first annual operating profit in five years in 2025, supported by revenue growth and cost reduction in the General Facilities segment.
Of the last four quarters since 2025Q3, operating losses occurred in three: 2025Q4, 2026Q1, and 2026Q2. In 2026Q2 revenue hit a record KRW 60.53bn yet the operating loss persisted at KRW 1.86bn, showing that revenue growth has not directly translated into improved profitability.
Hi-tech revenue from Samsung Electronics used to be substantial, but transactions have declined sharply in recent years, and the company is assessed to be in a relatively disadvantaged position in the semiconductor plant market compared with industry peers.
The company's 2025 construction capability ranking in the mechanical facilities and gas construction category was 47th, a sharp decline from a top-10 ranking in earlier years, reflecting the cumulative effect of several years of weak management performance.
In 2024, rising prices for raw materials such as galvanized steel piping used in General Facilities work widened the operating loss. Because contracts are typically fixed-price, any rise in costs during construction can immediately erode margins, making this an ongoing management factor.
Despite net income of KRW 7.59bn in 2025, operating cash flow was only KRW 66mn, a significant gap between reported profit and cash generation. As an order-driven business, revenue and profit can swing sharply by quarter depending on project start and completion timing.
As of July 2026, Woojin I&S was among the stocks designated by the Korea Exchange as subject to minority-account trading concentration. As a small-cap stock, price volatility can widen when trading volume is thin, warranting caution.
Release of 2026Q3 results - check whether the recent string of operating losses continues or whether revenue growth begins to translate into margin improvement.
Monitor construction progress on existing contracts such as the Naver Sejong data center and DB HiTek Sangwoo campus, and watch for follow-on IDC or semiconductor-related orders.
Watch for new fab investment announcements from Samsung Electronics or SK Hynix, a leading indicator for recovery in the Hi-tech segment's revenue share.
Check whether the Korea Exchange lifts the minority-account trading concentration designation, and monitor trends in trading volume and price volatility.
Woojin I&S is a mechanical facilities specialty contractor that relies on General Facilities as its cash cow while treating Hi-tech as a growth pillar tied to the semiconductor cycle.
Revenue grew 19.5% in 2025 and the company posted its first annual operating profit in five years, but operating losses returned in three of the last four quarters, meaning the durability of the profit recovery has not yet been confirmed.
Data-center-related orders such as the Naver Sejong project and signs of recovery in the semiconductor business such as the DB HiTek order are positive signals, but the decline in business with Samsung Electronics and the drop in construction capability ranking remain competitiveness concerns.
A valuation at a discount to net asset value and the KRX's minority-account trading concentration designation together characterize the risk-return profile of this stock.
The key variables for future earnings are the pace of the Hi-tech segment's recovery alongside the semiconductor investment cycle and whether the General Facilities segment can convert revenue growth into margin improvement through cost management.
This report does not present an investment opinion or target price and is provided for informational purposes only.
Report written 2026-09-05 · Data as of 2026-09-04
This content is AI analysis of market data and web search results, provided for information only. It is not a solicitation or recommendation to invest. Investment decisions and their consequences are the investor's own responsibility. Data may be delayed or contain errors.