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
Seoul Semiconductor has posted operating profit for four consecutive quarters, yet still recorded a net loss on an annual basis, as automotive-grade product mix expansion and pricing competition in IT and lighting LEDs unfold in parallel.
The company posted operating profit for three straight quarters from Q4 2025 through Q2 2026.
Full-year 2025 revenue reached KRW 1,013.5 billion, with an operating loss of KRW 31.5 billion and an owners' net loss of KRW 51.4 billion.
Expansion of automotive WICOP and high-voltage photo-semiconductor adoption is cited as the key variable for product mix and margin improvement.
The company maintains a vertically integrated structure from LED chips to packaging via subsidiary Seoul Viosys, with AI data center optical interconnects mentioned as a longer-term option.
Daishin Securities stated in an August 2026 report that it raised its target price from KRW 7,500 to KRW 9,500.
Founded in 1987, Seoul Semiconductor is a photo-semiconductor (LED) specialist that develops, manufactures, and sells LED products for general lighting, IT, automotive, and UV applications.
Its core technologies include SunLike, which reproduces natural sunlight spectra; WICOP, a wireless and packageless LED structure; the high-voltage-capable Acrich MJT; and the efficiency-enhancing nPola.
Most of its revenue comes from LED manufacturing and sales, with LED products accounting for 99.4% of sales as of the third quarter of 2024. The company holds the number one global position in LED backlighting and ranks third globally in the overall LED market as of 2023, according to Omdia.
Subsidiary Seoul Viosys produces LED chips supplied to parent Seoul Semiconductor, which then packages and sells them, forming a vertically integrated structure.
Production sites are centered on the Ansan headquarters with additional facilities in Tianjin, China, and Vietnam; in the first quarter of 2026, production volume reached 5.48 billion units, translating to a utilization rate of about 53% of capacity.
A core strategic focus is expanding high-value-added automotive products, with WICOP design wins secured across the top ten global automakers and applications in more than 100 vehicle models.
The competitive landscape features price competition with Chinese makers in commodity LEDs alongside technology competition with global leaders such as Nichia and Lumileds in the premium segment.
| Quarter | Revenue | Operating profit | Op. margin |
|---|---|---|---|
| 2025Q2 | ₩251.6B | -₩7.9B | −3.1% |
| 2025Q3 | ₩256.9B | -₩3.8B | −1.5% |
| 2025Q4 | ₩265.8B | ₩800M | 0.3% |
| 2026Q1 | ₩238.2B | ₩1.8B | 0.7% |
| 2026Q2 | ₩292.1B | ₩3.5B | 1.2% |
| Year | Revenue | Operating profit | Net income (parent) | Op. margin | ROE | Debt-to-equity |
|---|---|---|---|---|---|---|
| 2022 | ₩1.1T | -₩33.4B | -₩1.1B | −3.0% | −0.2% | 66.3% |
| 2023 | ₩1T | -₩49.4B | -₩22.4B | −4.8% | −3.3% | 77.2% |
| 2024 | ₩1.1T | ₩800M | -₩5B | 0.1% | −0.7% | 79.9% |
| 2025 | ₩1T | -₩31.5B | -₩51.4B | −3.1% | −8.3% | 76.1% |
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
Over the past four fiscal years, revenue fluctuated in a roughly KRW 1 trillion range: KRW 1,109.4 billion in 2022, KRW 1,032.4 billion in 2023, KRW 1,090.5 billion in 2024, and KRW 1,013.5 billion in 2025.
Operating profit was negative in 2022 (-KRW 33.4 billion) and 2023 (-KRW 49.4 billion), turned marginally positive in 2024 (+KRW 0.8 billion), then reverted to a loss of -KRW 31.5 billion in 2025.
Owners' net income was negative in all four years—-KRW 1.1 billion in 2022, -KRW 22.4 billion in 2023, -KRW 5.0 billion in 2024, and -KRW 51.4 billion in 2025—with the 2025 net loss expanding well beyond the operating loss, suggesting non-operating items weighed further on the bottom line.
On a quarterly basis, Q2 2025 showed an operating loss of -KRW 7.9 billion and a net loss of -KRW 22.8 billion, before the operating loss narrowed to -KRW 3.8 billion in Q3 2025, when net income turned positive at +KRW 1.7 billion.
Operating profit turned positive in Q4 2025 (+KRW 0.8 billion), even as net income reverted to a loss of -KRW 11.1 billion; Q1 2026 then delivered both operating profit (+KRW 1.8 billion) and net income (+KRW 5.0 billion) in positive territory.
In Q2 2026, revenue reached KRW 292.1 billion with operating profit of +KRW 3.5 billion and net income of +KRW 2.8 billion, extending a three-quarter streak of operating profitability.
Operating cash flow remained positive across all four years, moving from KRW 155.7 billion in 2022 to KRW 120.7 billion in 2023, KRW 59.6 billion in 2024, and KRW 87.9 billion in 2025, indicating the company continued to generate cash despite recurring net losses.
The debt ratio rose from 66.3% in 2022 to 76.1% in 2025, reflecting a decline in total equity linked to accumulated losses.
The LED industry is developing unevenly by application. General lighting and IT-use LEDs face structural margin pressure from price competition with Chinese manufacturers and the spread of substitute technologies such as OLED.
In contrast, automotive LEDs have shown relatively resilient growth, driven by increased lighting units per vehicle, larger display areas, and higher-function features such as adaptive driving beam (ADB) headlamps.
In a November 2024 report, Hana Securities estimated that the automotive revenue mix would reach about 34% in 2025, similar to the 39% estimated for IT. Some brokerage commentary has projected the automotive revenue share expanding from 16.5% in 2022 to 29.0% in 2026.
Seoul Semiconductor maintains its number one global position in LED backlighting and third place in the overall LED market (2023, Omdia) in this landscape, underpinned by differentiated technologies such as WICOP and SunLike and design wins across the top ten global automakers.
Over the longer term, some analysis points to a potential entry into the AI data center optical interconnect market through vertical integration with subsidiary Seoul Viosys, although this is regarded as an early-stage option that has not yet translated into meaningful revenue.
The company guided first-quarter 2026 revenue at KRW 240-260 billion, but actual first-quarter revenue came in slightly below that range.
For the second quarter, the guidance ceiling was reported at roughly KRW 290 billion, with the market estimate around KRW 275.8 billion; actual second-quarter revenue of KRW 292.1 billion exceeded both the guidance ceiling and the market estimate.
Operating profit, however, came in at KRW 3.5 billion, below the market estimate of KRW 4.7 billion.
Reflecting these second-quarter results, Daishin Securities stated in an August 2026 report that it raised its target price from KRW 7,500 to KRW 9,500, assessing that growth was solid across IT, automotive, and lighting segments, and that the operating margin improved by 0.5 percentage point quarter-on-quarter as low-margin products were reduced and average selling prices rose in lighting and automotive.
Company management has repeatedly stated its intent to continue expanding automotive and lighting sales centered on the wireless WICOP structure and the natural-light SunLike technology.
Subsequent quarterly guidance and confirmed results have typically followed a pattern of preliminary revenue disclosure about two weeks after quarter-end, followed by a formal IR event disclosing profit and loss details.
Seoul Semiconductor has recently moved into operating profitability, but has not yet demonstrated a stable run of net income, making standard net-income-based valuation metrics difficult to apply at this stage.
Based on price relative to net asset value per share, the stock appears to trade below a one-times multiple, placing it in a discount range relative to net assets.
The company has not paid cash dividends in recent years, so the market's focus rests less on dividend appeal and more on whether the recovery in operating profitability can be sustained.
Looking at the multi-year earnings pattern, the market has taken note of a shift from a cycle of losses and marginal profits toward a recent run of consecutive operating-profit quarters. Whether this trend continues or reverts to losses will need to be confirmed through upcoming quarterly results.
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 profit has been positive for three consecutive quarters from Q4 2025 through Q2 2026, sustaining a trend of improving profitability. Daishin Securities stated in an August 2026 report that it raised its target price from KRW 7,500 to KRW 9,500, reflecting the second-quarter results.
The report cited solid growth across IT, automotive, and lighting segments and an improved operating margin from reducing low-margin products.
Seoul Semiconductor has secured WICOP design wins across the top ten global automakers and applies the technology in more than 100 vehicle models.
Automotive LEDs are considered a relatively resilient growth segment, driven by increasing lighting units per vehicle and higher-function features such as adaptive headlamps. Expanding the automotive revenue mix is cited as a key variable for company-wide product mix improvement and margin normalization.
Despite recording net losses in every year from 2022 through 2025, operating cash flow remained positive each year. It moved from KRW 155.7 billion in 2022 to KRW 120.7 billion in 2023, KRW 59.6 billion in 2024, and KRW 87.9 billion in 2025, with fluctuations but consistent cash generation.
This reflects a gap between accounting losses and actual cash flow typical of depreciation-heavy manufacturing businesses.
In 2025, the operating loss was KRW 31.5 billion, while the owners' net loss was larger at KRW 51.4 billion, suggesting non-operating factors contributed to the wider loss.
This illustrates that a return to operating profit alone does not guarantee stable net income, as seen in Q4 2025 when operating profit was positive (+KRW 0.8 billion) yet net income was still negative at -KRW 11.1 billion.
General lighting and IT-use LEDs face structural pressure from price competition with Chinese manufacturers and the spread of substitute technologies such as OLED.
These applications still account for a substantial share of total revenue, leaving open the question of whether the pace of automotive mix improvement can sufficiently offset this pressure.
Subsidiary Seoul Viosys' cost-of-goods-sold ratio reached 95% on a consolidated basis in 2023, with its operating loss widening even as revenue grew.
The subsidiary has a history of conducting a capital increase to improve financial soundness, and this profitability burden remains a structural risk that could affect group-wide results.
The commodity general-lighting and IT LED market is structurally exposed to oversupply and ongoing price competition from Chinese manufacturers, which could delay a profitability recovery in these segments.
The spread of alternative display technologies such as OLED could also constrain LED demand in certain applications.
As of the first quarter of 2026, key raw materials—chips, epoxy, PCBs, and wafers—accounted for 52.4% of total purchases, meaning raw material prices and currency movements can directly affect the cost structure.
Operating overseas production sites in China and Vietnam also exposes margins to local currency and logistics cost fluctuations.
Key subsidiary Seoul Viosys operates a high-cost-ratio business structure, making financial soundness management an ongoing challenge, with a history of a capital increase to strengthen its balance sheet.
Given the frequency of patent disputes across the LED industry, the outcomes of intellectual property litigation could affect the group's broader business strategy.
Check for the preliminary third-quarter revenue disclosure, typically released about two weeks after quarter-end—assess whether automotive mix expansion and seasonal demand are reflected.
Watch for the confirmed third-quarter results and fourth-quarter revenue guidance, based on the historical IR schedule pattern—check whether the operating-profit streak extends to a fourth consecutive quarter and whether net income also stabilizes in positive territory.
Track the trend in automotive revenue mix and any new automaker OEM design win announcements—an indicator of whether the company-wide sales mix improvement is sustained.
Monitor disclosures related to subsidiary Seoul Viosys' earnings, capital increases, and patent litigation—assess their impact on the group's overall financial soundness and profitability.
Seoul Semiconductor has shown signs of a shift in its earnings structure, posting operating profit for three consecutive quarters from Q4 2025 through Q2 2026, though the owners' net loss for full-year 2025 actually widened to KRW 51.4 billion, meaning further confirmation is needed before net income can be considered stabilized.
Expansion of automotive WICOP and high-voltage photo-semiconductor adoption is cited as the key driver of product mix improvement, but pricing competition in commodity IT and lighting LEDs and the high cost structure at subsidiary Seoul Viosys remain burdens.
Operating cash flow stayed positive in all four years, showing that cash generation was maintained even during periods of weak reported earnings.
Daishin Securities' August 2026 target price increase reflects one data point on how the sell side has responded to recent results, and whether this improvement continues will require confirmation through upcoming quarterly results and guidance.
Readers should weigh the volatility in annual and quarterly earnings structure together with industry-level risks before forming any judgment.
Report written 2026-09-05 · Data as of 2026-09-04
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