PER, EPS, PBR and BPS are calculated in-house from the last 4 quarters (2025Q3–2026Q2) · Dividend yield is based on ₩0 per share · Prices as of the 2026-10-02 close
Justem, a niche leader in semiconductor humidity-control equipment, followed its 2025 return to profit with a sharp expansion in revenue and earnings through the first half of 2026.
FY2025 consolidated revenue reached KRW 48.29bn with operating profit of KRW 4.63bn, marking a return to profit after two loss-making years, with quarterly momentum accelerating into 2026
2Q26 revenue of KRW 29.32bn and operating profit of KRW 9.28bn marked a quarterly record, with operating margin expanding into the high-20s to 30% range
Most revenue comes from the semiconductor segment, with heavy dependence on the top three global IDM customers
The company is diversifying into non-semiconductor areas such as display (Chinese OLED makers) and secondary battery equipment
Multiple verifiable catalysts are pending, including capacity expansion, a new Yongin campus, and commercialization of the next-generation integrated JDS solution
Justem specializes in environmental control equipment that raises semiconductor manufacturing yields by regulating humidity, temperature, and airborne molecular contamination (AMC) inside wafer transport containers (FOUP) and equipment front-end modules (EFEM).
Founded in 2016 and listed on KOSDAQ in 2022, the company has secured roughly an 85% share of the humidity-control equipment market among the top three global integrated device manufacturers (IDMs). It expanded its business after the IPO through the acquisition of Pulram.
Its product lineup has evolved from the first-generation N2 Purge system (N2LPM) to the second-generation JFS, third-generation JDM, and the upcoming integrated JDS that manages both humidity and temperature.
On a cumulative basis through the third quarter of 2025, revenue mix stood at approximately 83% semiconductor, 7% display, 8% solar, and 1% secondary battery, with the top three global IDM customers accounting for 79% of sales. This reflects a highly concentrated customer structure.
Outside semiconductors, the company is pushing into the Chinese OLED panel market with its vacuum ionizing source (VIS) system, and through subsidiary Pulram it has entered secondary-battery surface treatment and cleaning equipment using low-temperature plasma technology.
Justem's competitive edge rests on technical know-how and field-verified track records, as customers generally favor proven external suppliers over in-house development.
| Quarter | Revenue | Operating profit | Op. margin |
|---|---|---|---|
| 2025Q2 | ₩11.3B | ₩2.1B | 18.4% |
| 2025Q3 | ₩12.1B | ₩500M | 4.5% |
| 2025Q4 | ₩14.3B | ₩400M | 2.6% |
| 2026Q1 | ₩17.7B | ₩4.1B | 23.0% |
| 2026Q2 | ₩29.3B | ₩9.3B | 31.6% |
| Year | Revenue | Operating profit | Net income (parent) | Op. margin | ROE | Debt-to-equity |
|---|---|---|---|---|---|---|
| 2022 | ₩46.1B | ₩7.1B | ₩6.3B | 15.5% | 12.4% | 38.7% |
| 2023 | ₩35.9B | ₩300M | -₩3.4B | 0.9% | −7.0% | 69.8% |
| 2024 | ₩38.7B | -₩4.6B | -₩2.1B | −11.9% | −4.4% | 65.0% |
| 2025 | ₩48.3B | ₩4.6B | ₩3.5B | 9.6% | 6.6% | 66.6% |
Consolidated basis (financial statements including subsidiaries) · Final figures from DART filings · Net income attributable to owners of the parent · Data as of 2026-09-04
Justem's earnings peaked in 2022 with revenue of KRW 46.10bn and operating profit of KRW 7.14bn, before a pronounced downturn in 2023-2024. In 2023 operating profit fell to near breakeven at KRW 0.31bn, net income posted a loss of KRW 3.39bn, and operating cash flow turned negative at KRW -8.18bn.
In 2024 revenue declined to KRW 38.70bn with an operating loss of KRW 4.61bn and a net loss of KRW 2.14bn, marking a second consecutive loss-making year.
In 2025, revenue rose about 24.8% year-over-year to KRW 48.29bn, operating profit turned positive at KRW 4.63bn, net income attributable to owners reached KRW 3.47bn, and operating cash flow recovered to KRW 7.27bn.
On a quarterly basis, operating margin moved from 18.4% in 2Q25 (revenue KRW 11.31bn, operating profit KRW 2.08bn) down to 4.5% in 3Q25 and 2.6% in 4Q25, a period of margin compression.
Notably, 4Q25 posted a small operating profit of KRW 0.37bn yet a net loss attributable to owners of KRW -0.44bn, suggesting non-operating items or tax-related one-off factors may have weighed on the bottom line.
Momentum then reaccelerated sharply, with 1Q26 revenue of KRW 17.69bn and operating margin of 23.0%, followed by 2Q26 revenue of KRW 29.32bn and operating margin of 31.6%.
This pattern indicates the company has entered an operating-leverage phase where growing semiconductor orders are converting into revenue faster than fixed costs rise.
The global memory semiconductor cycle is being driven by AI server and HBM demand, with the top three IDMs (Samsung Electronics, SK Hynix, and Micron) expanding new fab investment.
However, the point at which new fab investment translates into actual production increases is projected around the second half of 2027, meaning that in the interim, stabilizing yields on existing lines has become a key priority.
This creates a structural backdrop in which demand for yield-improvement equipment like Justem's can persist independent of the new-capacity investment cycle. One brokerage estimated that Justem's semiconductor segment revenue would grow from KRW 41.0bn in 2025 to KRW 96.4bn in 2026 and KRW 123.1bn in 2027.
On the customer side, Micron announced it would expand its US semiconductor investment to USD 200 billion, and Justem has completed JFS quality testing at both of Micron's new fabs in Boise, Idaho and in New York.
Still, ongoing US tariff discussions on semiconductors in 2026 have added uncertainty to Micron's investment timeline, which could translate into order-timing risk if customer capex schedules shift.
Justem is one of a small number of suppliers with a verified track record in the specialized field of wafer-transfer environmental control, and although it commands a large share of that niche market, its operating margin lingered in the single digits for extended periods, making the question of whether market share will translate into profitability a key point to watch.
Justem's existing production capacity is estimated at around KRW 200bn, with ongoing expansion expected to lift it to roughly KRW 300bn once completed. Some analysts interpret this expansion as targeting not only yield-improvement retrofits on existing lines but also anticipated new capacity build-outs by customers.
The company has confirmed plans to build a new headquarters of about 19,800 square meters within the Yongin semiconductor cluster by 2028, while currently operating out of its Yongin plant 1 and Hwaseong plant 2.
On the product side, the next-generation integrated solution JDS (Justem Dry System), which combines its first- through third-generation humidity-control technologies, has reportedly completed development and is being proposed to major global customers, with commercial launch targeted for the second half of the year.
For Samsung Electronics, an initial supply of 50 JFS systems in December 2025 was followed by an additional order of 310 systems in January 2026, indicating that adoption of the second-generation equipment is spreading across production lines.
In the display segment, the company has reportedly completed on-site evaluation and demo-equipment orders tied to the expansion of Chinese OLED investment (including BOE's Gen 8.6 line in Chengdu), with some brokerages anticipating mass-production orders within the year.
These optimistic estimates, however, remain individual brokerage forecasts, and the actual timing of order intake and revenue recognition will depend on customers' investment decisions and process-qualification schedules.
Justem swung from losses in 2023-2024 back to profit in 2025, and by the first half of 2026 had entered a phase where both quarterly revenue and operating margin were expanding simultaneously.
Reflecting this earnings recovery, the price-to-book multiple has moved in a direction that eases the burden compared with the loss-making period, though the stock is still assessed as trading at a considerable premium to net asset value.
One brokerage cited an average price-to-earnings ratio of around 20 times for companies holding yield-improvement equipment technology, which can serve as a useful industry reference point.
The company currently pays no cash dividend, reflecting an early-growth capital-allocation pattern in which improved earnings are being reinvested first into capacity expansion and new-product development.
How the valuation is ultimately judged will likely hinge on how quickly the pending capacity expansion and JDS commercialization translate into actual revenue and profit.
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 2026-09-04
Operating margin jumped to 23.0% and 31.6% in 1Q26 and 2Q26 respectively, indicating the company has entered a phase where revenue growth converts quickly into profit. This shows semiconductor orders are converting into revenue faster than fixed costs are rising. Whether this leverage effect persists after capacity expansion completes remains a key point to monitor.
Analysts note that with new fab investment expected to translate into actual production increases only around the second half of 2027, stabilizing yields on existing lines has become a key priority in the interim.
This provides a backdrop where demand for Justem's equipment can persist independent of the new-capacity cycle. The additional JFS order from Samsung Electronics (50 systems in December 2025, followed by 310 systems in January 2026) supports this trend.
Existing capacity of roughly KRW 200bn is expected to expand to about KRW 300bn once the ongoing build-out is complete, and the company has confirmed plans for a new headquarters within the Yongin semiconductor cluster by 2028.
The next-generation integrated JDS solution has reportedly completed development with a second-half launch target, and successful commercialization could broaden the product portfolio further. Efforts to secure Chinese OLED customers in the display segment could provide an additional growth avenue.
Customer concentration is high, with the top three global IDM customers accounting for 79% of revenue. A pullback in investment or delayed orders from any single customer could directly affect results. The 2023-2024 earnings slump also coincided with a contraction in customer investment.
Despite holding a leading global market share, the 2025 operating margin was assessed at around the high-single-digit percentage range. Some observers note that the flagship first-generation product has yet to escape a 'component pricing' structure.
While margins have improved significantly since 2026, whether this improvement is structurally sustainable requires further confirmation.
Micron's expanded US fab investment is favorable for Justem, but ongoing 2026 semiconductor tariff discussions have added uncertainty to the investment timeline. If customer investment timing is delayed, the timing of order recognition for Justem could also slip. The company has stated it currently faces no direct tariff burden, but geopolitical variables remain.
Dependence on the top three global IDM customers reaches 79% of revenue, meaning a change in any single customer's investment plans could materially affect results. New customer diversification is underway but its revenue contribution remains limited so far.
Given consecutive losses in 2023-2024, a reversal of the semiconductor upcycle could again slow earnings. Fixed-cost increases from capacity expansion and the new headquarters could pressure margins again if revenue growth fails to keep pace.
Policy variables such as US semiconductor tariff discussions could affect major customers' investment timelines. The stock has also previously been designated and had its designation lifted as an investment-warning issue by the Korea Exchange, underscoring the need to monitor supply-demand volatility.
The Q3 quarterly report filing should be checked to see whether the trend of expanding revenue, operating margin, and order backlog continues.
Whether the next-generation integrated JDS solution actually reaches commercialization and customer adoption should be checked, including whether the targeted second-half launch is delayed.
Completion of the capacity expansion toward roughly KRW 300bn and the actual utilization rate achieved should be confirmed.
Whether mass-production orders materialize from Chinese OLED customers such as BOE should be checked, as realization of new display-segment customers is a key point to watch.
Progress on the new Yongin semiconductor cluster headquarters and whether the construction schedule is being met should be periodically checked.
Justem is a KOSDAQ small-cap component and equipment maker holding a high market share in the specialized field of semiconductor humidity control among leading global IDM customers, having moved past its 2023-2024 slump into a 2025 return to profit and, by the first half of 2026, a phase where quarterly revenue and operating margin were expanding simultaneously.
This earnings improvement has been driven by demand for stabilizing yields on existing lines during the semiconductor upcycle and by expanded supply of second-generation JFS equipment to major customers such as Samsung Electronics and Micron.
However, revenue concentration with the top three customers at 79% means results can be sensitive to shifts in any single customer's investment timing, and the fact that operating margin remained in the single digits despite a leading global share in earlier periods leaves questions about the underlying profitability structure.
Capacity expansion, commercialization of the next-generation integrated JDS solution, and securing Chinese display customers are all growth checkpoints that also carry execution risk.
Policy variables such as US semiconductor tariff discussions, along with the stock's history of investment-warning designation, should be weighed as additional sources of uncertainty in both the business environment and trading dynamics.
Overall, Justem sits at a juncture where structural growth drivers and earnings volatility coexist, and the durability of this trend will need to be assessed through upcoming quarterly disclosures and progress on new products and customer diversification.
Report written 2026-09-05 · Data as of 2026-09-04
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