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
Senko posted higher revenue and net income in 2025 while sharply cutting its debt ratio, with expanded new deliveries to SK Hynix emerging as the key variable for the next phase.
2025 consolidated net income attributable to owners rose sharply year on year, extending the turnaround that began after the 2023 loss.
The debt ratio fell markedly from 76.2% in 2022 to 23.4% in 2025, indicating improved financial structure.
The company said it secured about 64% of the fixed gas alarm volume tied to SK Hynix's 2026 new line investment.
Quarterly results show a recurring gap between operating profit and net income, warranting a check on non-operating contributions.
Despite an operating loss in Q1 2026, both revenue and operating profit hit period highs in Q2 2026.
Senko was founded in 2004 and listed on KOSDAQ in 2020 as a specialist in gas sensors and gas safety equipment.
Its core operations are split between the sensor device business, centered on electrochemical gas sensors and gas detectors, and the environmental monitor and systems business, which measures odors and fine particulates.
Based on its most recent business report, the sensor device segment accounts for roughly 67% of revenue and the environmental monitor and systems segment for about 28%, together making up the bulk of sales.
The company was the first in Korea to develop electrochemical gas sensor technology and remains the sole domestic holder of the IECEx international explosion-protection certification, which it uses to differentiate its technical capability.
Its customer base spans domestic semiconductor manufacturing sites, industrial safety demand, and overseas industrial gas detector demand, and it recently began new deliveries of fixed gas alarms to SK Hynix.
Through its affiliate UNI, the company is pursuing commercialization of an AI and digital-twin-based facility safety management platform, expanding from sensor hardware into safety management software.
It is also pursuing entry into China's semiconductor market and establishing a US subsidiary to broaden its global sales footprint. This business structure is tied to two demand drivers: domestic semiconductor capital investment and tightening industrial safety regulation.
| Quarter | Revenue | Operating profit | Op. margin |
|---|---|---|---|
| 2025Q2 | ₩9.4B | ₩400M | 4.7% |
| 2025Q3 | ₩8.3B | ₩800M | 9.5% |
| 2025Q4 | ₩12.5B | ₩900M | 7.0% |
| 2026Q1 | ₩8.8B | -₩200M | −2.3% |
| 2026Q2 | ₩12.6B | ₩1.4B | 11.2% |
| Year | Revenue | Operating profit | Net income (parent) | Op. margin | ROE | Debt-to-equity |
|---|---|---|---|---|---|---|
| 2022 | ₩40.8B | ₩2.8B | ₩1B | 6.8% | 2.3% | 76.2% |
| 2023 | ₩34B | ₩2.2B | -₩1.2B | 6.6% | −2.9% | 65.7% |
| 2024 | ₩35.9B | ₩2.7B | ₩2.5B | 7.6% | 6.0% | 57.6% |
| 2025 | ₩36.7B | ₩2.5B | ₩5B | 6.8% | 8.6% | 23.4% |
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 36.73 billion, up 2.4% from KRW 35.86 billion in 2024, while operating profit fell 7.8% to KRW 2.50 billion from KRW 2.72 billion, pulling the operating margin down from 7.6% to 6.8%.
Net income attributable to owners, however, roughly doubled to KRW 4.97 billion from KRW 2.52 billion the prior year. This followed a turnaround from a KRW 1.21 billion net loss attributable to owners in 2023 to a profit in 2024, with earnings scaling up further in 2025.
The debt ratio dropped sharply from 76.2% in 2022 and 65.7% in 2023 to 57.6% in 2024 and then 23.4% in 2025, marking a clear improvement in financial structure.
On a quarterly basis, net income attributable to owners jumped to KRW 3.37 billion in Q3 2025, well above that quarter's operating profit of KRW 0.79 billion, suggesting a meaningful non-operating contribution.
Q1 2026 posted an operating loss of KRW 0.20 billion yet still turned a net profit of KRW 1.69 billion attributable to owners, while Q2 2026 delivered the strongest operating performance in this window with revenue of KRW 12.64 billion and operating profit of KRW 1.41 billion.
Summed over the trailing four quarters (Q3 2025 through Q2 2026), revenue totaled KRW 42.33 billion, operating profit KRW 2.88 billion, and net income attributable to owners KRW 7.26 billion.
On a separate (non-consolidated) basis, the company reported Q2 2026 revenue of KRW 12.14 billion and operating profit of KRW 1.55 billion, up 27.8% and 59.0% year on year, respectively.
The gas sensor market continues to grow at a moderate pace, driven by tightening industrial safety regulation and expanding semiconductor and chemical facility investment.
Market researcher GM Insights projected that the global gas sensor market surpassed USD 2.53 billion in 2023 and would grow at roughly 8% annually from 2024 to 2032.
In Korea, demand for gas detectors tied to new and expanded semiconductor fabs has emerged as a key growth driver, and Senko is positioned to expand supply to large domestic semiconductor customers such as SK Hynix.
The company leverages its status as the sole domestic holder of IECEx certification as a competitive edge, while also holding multiple overseas certifications including CSA and UL in North America, ATEX in Europe, and Inmetro in South America to support overseas market entry.
Large overseas sensor makers have also entered the semiconductor safety market, so competitive pressure persists.
In terms of the industry cycle, performance is tied to semiconductor demand conditions and capital investment schedules, meaning fluctuations in the semiconductor investment cycle can translate into earnings volatility.
The company said it secured about 64% of the fixed gas alarm volume tied to SK Hynix's 2026 new line investment. This volume began being reflected in revenue from 2026, and the company explained that new deliveries to SK Hynix contributed roughly KRW 2.1 billion in additional revenue in the second quarter.
A company representative said it expects to continue its growth trend in the second half by responding to semiconductor industry demand, expanding supply to major overseas customers, and developing new accounts.
As a new product, the company unveiled a semiconductor-specific composite gas detector, and it is pursuing commercialization of an AI and digital-twin-based facility safety management platform through affiliate UNI, planning to expand from sensor hardware into a software platform business.
The company explained that overseas revenue from existing key customers has continued to show steady growth. Over the medium to long term, entry into China's semiconductor market and expansion of the global sales base through the US subsidiary are also continuing to be pursued.
Senko's share price trades against a backdrop of net income attributable to owners moving from a loss in 2023 to a profit in 2024 and then improving further in 2025.
Its share price relative to net assets has moved within its historical five-year band, and how much of this earnings improvement the market has already priced in is a matter investors may assess differently.
The company did not pay a dividend in its most recent fiscal year, suggesting shareholder returns remain focused on reinvesting earnings and improving the balance sheet through debt reduction.
The decline in the debt ratio from the 76% range in 2022 to the 20% range in 2025 can be read as a positive shift in financial stability.
That said, the recurring gap between quarterly operating profit and net income, reflecting non-operating contributions, means views on valuation may differ depending on how one assesses the quality of earnings.
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
The company said it secured about 64% of the fixed gas alarm volume tied to SK Hynix's 2026 new line investment. New deliveries under this contract added roughly KRW 2.1 billion to revenue in the second quarter.
The company said it expects to sustain growth in the second half by meeting semiconductor industry demand and expanding supply to overseas customers.
The debt ratio fell markedly from 76.2% in 2022 to 65.7% in 2023, 57.6% in 2024, and 23.4% in 2025. Over the same period, net income attributable to owners turned from a loss in 2023 to a profit in 2024 and then rose substantially further in 2025. Operating cash flow remained positive each year, indicating improving financial stability.
The company unveiled a new semiconductor-specific composite gas detector and is pursuing commercialization of an AI and digital-twin-based facility safety management platform through affiliate UNI. The company explained that overseas revenue from existing key customers has maintained steady growth.
Expansion of the global sales base through entry into China's semiconductor market and establishment of a US subsidiary is also continuing.
Quarterly operating profit showed significant volatility, including an operating loss of KRW 0.20 billion in Q1 2026. The 2025 operating margin of 6.8% was actually lower than 7.6% in 2024, showing periods where revenue growth did not directly translate into profitability improvement. Timing of order recognition from semiconductor customers can widen the quarter-to-quarter performance gap.
In Q3 2025, net income attributable to owners of KRW 3.37 billion far exceeded that quarter's operating profit of KRW 0.79 billion, suggesting a substantial non-operating impact. A similar pattern recurred in Q1 2026, when the company posted a net profit of KRW 1.69 billion despite an operating loss. Whether this gap between operating profit and net income persists will need to be confirmed in coming quarters.
Revenue growth appears increasingly concentrated around a specific large semiconductor customer such as SK Hynix, meaning performance can be swayed by that customer's investment schedule. As a small-cap KOSDAQ stock, trading volume and liquidity may be limited.
The environmental monitor and systems segment appears to be growing at a relatively slower pace than the sensor device segment.
As new deliveries to SK Hynix become a key growth driver, revenue dependence on a specific customer may increase. If the semiconductor customer cuts capital spending or delays its schedule, related revenue could also be affected.
The company said it is developing new accounts in parallel, but the results of these efforts require further confirmation.
The recurring gap between quarterly operating profit and net income suggests non-operating income has had a substantial impact on results. If such gains do not repeat every quarter, quarterly volatility in net income attributable to owners could increase.
Investors need to distinguish between operating profit and net income when assessing the sustainability of earnings.
As the share of overseas revenue grows, currency fluctuations can affect both revenue and profit. Entering China's semiconductor market and operating a US subsidiary may involve initial costs and regulatory compliance burdens.
Costs associated with country-specific safety certification and regulatory changes also remain a potential risk.
This is the expected timing for the Q3 2026 consolidated earnings disclosure, when the scale of SK Hynix-related revenue and any recovery in operating margin can be checked.
The progress of SK Hynix's 2026 new line investment and any additional fixed gas alarm orders should be monitored.
The progress of affiliate UNI's commercialization of its AI and digital-twin-based facility safety management platform should be reviewed.
Whether the improving trend in the debt ratio and operating cash flow continues should be confirmed in the 2026 annual results.
Any future disclosure of concrete revenue contributions from China semiconductor market entry and the US subsidiary should be checked.
Senko is a small-cap KOSDAQ company supplying products to the semiconductor and industrial safety markets based on electrochemical gas sensor technology.
Both consolidated revenue and net income rose in 2025, with net income attributable to owners increasing substantially year on year and the debt ratio falling markedly, reflecting an improving financial structure.
However, the operating margin declined from 2024, and the recurring quarterly gap between operating profit and net income warrants further scrutiny of earnings quality.
Expanded new deliveries to SK Hynix, overseas revenue growth, and new business initiatives such as the AI and digital-twin platform are cited as growth drivers, but rising dependence on a specific customer and earnings volatility are factors that should also be monitored.
Upcoming quarterly results and the progress of SK Hynix-related orders are likely to be key variables in gauging the company's future trajectory. This report is provided for informational purposes only and does not include a buy or sell recommendation or a target price.
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.