KOSDAQSemiconductors080220

Jeju Semiconductor

₩93,300▲ 5.78%2026-10-02 close

Market Cap

₩3.2T

Turnover

₩395.6B

Volume

4.3M

Shares out.

34.4M

PER

10.5×

PBR

5.4×

EPS

₩6,849

Dividend Yield

0.00%

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

Report overview

A Legacy Memory Fabless Riding the Supercycle

Jeju Semiconductor has filled the gap left by large makers exiting low-power and legacy memory, lifting its quarterly operating margin into the 40 percent range, but much of that profit is tied to price spikes, so the durability of these earnings is the central question.

1
Second quarter 2026 revenue was KRW 289.9bn with operating profit of KRW 121.9bn, an operating margin of about 42 percent, exceeding the prior quarter's KRW 180.5bn revenue and KRW 67.1bn operating profit (about 37 percent margin).
2
First half 2026 revenue of KRW 470.4bn and operating profit of KRW 189.0bn already far exceed full year 2025 (revenue KRW 302.2bn, operating profit KRW 35.9bn).
3
The earnings surge stems from large memory makers shifting capacity to high value AI products, shrinking supply of older lines such as LPDDR4X and DDR4.
4
The company has said it plans to produce its own designed LPDDR4X at an SK hynix fab around 2028 and LPDDR5 with a 2030 mass production target.
5
A KRW 62.0bn bond with warrants issued in March 2026 funded raw materials and R&D; warrants become exercisable from March 2027, leaving a dilution overhang.

Business structure

Jeju Semiconductor is a memory specialist fabless company that owns no production lines, outsourcing wafer manufacturing to foundries and packaging and testing to other subcontractors.

Unlike most Korean fabless firms that focus on system chips, it is an unusual case built on memory, supplying an MCP, DRAM, NAND flash and legacy memory lineup to more than 200 customers at home and abroad.

Its main products are low-power memory for mobile devices, the internet of things and automotive electronics, including LPDDR family parts and mobile memory solutions such as MCP and eMCP, with application areas still widening.

End markets break down into 5G IoT, consumer, mobile and automotive, leaving relatively low dependence on any single customer or application.

Wafers are outsourced to Taiwanese foundries Powerchip and Winbond, and per the 2025 annual report overseas sales accounted for 93.7 percent of revenue with China alone at 73.6 percent, a clearly export-skewed profile.

Alongside its established model of buying memory wafers, packaging and testing them and selling under its own brand, it is now running a partnership in which it designs LPDDR DRAM itself and has it produced in an SK hynix fab.

Management said LPDDR4X would be produced at an SK hynix fab targeting mass production around 2028, and that successor product LPDDR5 would follow the same route with a 2030 target.

In automotive memory, entered in 2020, it has expanded work with European auto parts suppliers and LG Electronics and holds more than ten automotive component reliability certifications, targeting telematics, driver assistance and infotainment.

Competitively it fills the low-density, low-power niche that Samsung Electronics, SK hynix and Micron leave behind as they concentrate on high performance, high density parts, and supply of older technologies such as LPDDR4 and eMMC is shrinking quickly as players including China's CXMT shift output to higher margin server products.

Earnings trend

Quarterly revenue · Operating profit

₩51.1B₩4.3B25Q2₩111B₩13.9B25Q3₩91.8B₩13.9B25Q4₩180.5B₩67.1B26Q1₩289.9B₩121.9B26Q2

RevenueOperating profit

Annual revenue · Operating profit

₩175B₩28.2B2022₩145.9B₩17.8B2023₩162.3B₩9.6B2024₩302.2B₩35.9B2025

RevenueOperating profit

Quarterly results · Last 5 quarters
Quarter	Revenue	Operating profit	Op. margin
2025Q2	₩51.1B	₩4.3B	8.5%
2025Q3	₩111B	₩13.9B	12.5%
2025Q4	₩91.8B	₩13.9B	15.2%
2026Q1	₩180.5B	₩67.1B	37.2%
2026Q2	₩289.9B	₩121.9B	42.0%

Annual results
Year	Revenue	Operating profit	Net income (parent)	Op. margin	ROE	Debt-to-equity
2022	₩175B	₩28.2B	₩24.3B	16.1%	17.2%	23.3%
2023	₩145.9B	₩17.8B	₩16.7B	12.2%	10.6%	25.3%
2024	₩162.3B	₩9.6B	₩19.5B	5.9%	10.6%	22.4%
2025	₩302.2B	₩35.9B	₩39.5B	11.9%	17.4%	47.9%

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

Earnings analysis

On an annual basis revenue fell from KRW 175.0bn in 2022 to KRW 145.9bn in 2023, then rose to KRW 162.3bn in 2024 and KRW 302.2bn in 2025, while operating profit traced KRW 28.2bn (16.1 percent margin) in 2022, KRW 17.8bn (12.2 percent) in 2023, KRW 9.6bn (5.9 percent) in 2024 and KRW 35.9bn (11.9 percent) in 2025.

The 2024 combination of higher revenue with a 5.9 percent margin shows how heavy the cost burden was during the price downturn, while 2025 saw revenue almost double and margins return to double digits.

Quarterly data shows the shift more sharply: from KRW 51.1bn revenue and KRW 4.3bn operating profit in the second quarter of 2025 to KRW 110.9bn and KRW 13.9bn in the third, KRW 91.8bn and KRW 13.9bn in the fourth, then KRW 180.5bn and KRW 67.1bn (about 37 percent margin) in the first quarter of 2026 and KRW 289.9bn and KRW 121.9bn (about 42 percent) in the second.

First half 2026 revenue of KRW 470.4bn and operating profit of KRW 189.0bn already dwarf full year 2025, and the last four quarters combined bring revenue into the KRW 670bn range.

With a fabless cost base carrying little fixed cost, profit grew far faster than revenue once selling prices spiked, and the company said DRAM prices had risen more than 100 percent in connection with its first quarter results.

Investors should note, however, that operating profit and net profit have repeatedly moved in different directions: the second quarter of 2025 showed KRW 4.3bn of operating profit but a net loss of KRW 2.6bn attributable to owners, while the third quarter of 2025 paired KRW 13.9bn operating profit with KRW 22.7bn net profit and the first quarter of 2026 paired KRW 67.1bn with KRW 78.1bn, implying large non-operating swings.

Cash flow has trailed earnings with a lag, with operating cash flow at negative KRW 2.2bn in 2022, KRW 2.5bn in 2023, negative KRW 9.7bn in 2024 and positive KRW 25.6bn in 2025, still short of the KRW 39.5bn net profit attributable to owners that year.

On the balance sheet, equity grew from KRW 184.2bn at end 2024 to KRW 227.1bn at end 2025, but liabilities expanded from KRW 41.2bn to KRW 108.9bn, lifting the debt-to-equity ratio from 22.4 percent to 47.9 percent, reflecting simultaneous growth in working capital needs and external funding.

Industry analysis

The memory cycle has entered an extreme upswing driven by artificial intelligence investment.

In its second quarter 2026 report, research firm SigmaIntell said next generation GPU ramps and expanding AI clusters had created an unprecedented boom, with limited wafer capacity concentrated on high bandwidth memory and AI server memory and consumer supply for mobile and PC tightening severely.

The same work projected a 89 percent quarter-on-quarter price rise for 12GB LPDDR5X in the second quarter of 2026, with lower specification 4GB LPDDR4X up 75 percent to USD 45.9. Jeju Semiconductor's core product family sits precisely in that band, which is the starting point of its earnings leverage.

TrendForce had earlier said major Korean and US suppliers were expected to sharply cut or halt LPDDR4X output, that many mobile processors are not yet compatible with the newest LPDDR5X, creating a supply demand mismatch, and that smartphone brands stepping up LPDDR4X procurement was the main driver of rising contract prices.

All major makers are trimming older DRAM output, Samsung Electronics told a conference call it expects supply constraints on legacy products such as DDR4, LPDDR4X and GDDR6 to persist, and industry participants argue that even temporarily better profitability will not bring capacity back because that capacity is needed for high value products.

Structurally locked supply is supportive, but caution about the pace of price gains is also emerging: SigmaIntell said tight consumer memory supply should continue for a while but that increases in the second half would gradually moderate as brands resist prices and adjust orders.

TrendForce also projected that improving LPDDR5X supply could push its contract prices below LPDDR4X, and that faster qualification and industry-wide upgrades would reduce LPDDR4X dependence.

The company's position therefore combines the strength of being one of very few suppliers in the low-density legacy space vacated by the big three with the weakness that this space is a structurally shrinking market.

Outlook

The clearest confirmed growth axis is securing foundry capacity and moving up product generations.

A company vice president said LPDDR5, the successor to LPDDR4X, would be produced at an SK hynix fab with a 2030 mass production target and undetermined volume; reports said a multi-year agreement to use SK hynix capacity had been signed, with the site presumed to be the Wuxi plant in China, and that the company hopes LPDDR output could eventually lift annual revenue to the trillion won scale.

The tie-up reflects a meeting of interests, since legacy memory demand clearly exists but large makers find it hard to assign design teams to it alone, and the Wuxi fab, which cannot install extreme ultraviolet tools, may settle into a legacy-only role.

On the product roadmap, the company said it is accelerating LPDDR5X based products and memory for AI edge and AIoT devices while widening applications into drones and robotics.

On funding, the board decided on 13 March 2026 to issue a fourth series privately placed bond with warrants worth KRW 62.0bn, of which KRW 50.0bn is earmarked as working capital for wafers and other raw materials to support higher sales and KRW 12.0bn for R&D on new products, to be deployed in stages through beyond 2028.

No official numerical guidance from the company has been verified, so earnings durability will hinge on selling prices and secured foundry volume.

Key items to watch in the second half are the pace of contract price gains, the ability of low and mid tier smartphone and IoT customers to absorb costs, and whether first half margin levels hold from the third quarter onward.

One report noted that no separate disclosure directly explaining the recent share price surge had been made, which makes quantitative confirmation through the next periodic filing all the more relevant.

Valuation

PER

10.5×

PBR

5.4×

ROE

72.5%

EPS

₩6,849

BPS

₩13,268

Dividend per share

₩0

With earnings expanding so sharply in a short period, earnings-based and asset-based multiples currently tell different stories.

Using the last four quarters of profit as the denominator, the earnings multiple sits toward the low end of the KOSDAQ semiconductor group, but that denominator leans heavily on the two quarters in which the price spike concentrated, namely the first and second quarters of 2026.

Against net assets, by contrast, the premium is substantial, and the calculated figure varies widely depending on whether end-2025 equity or equity including subsequent half-year profits is used, which can split interpretations across metrics.

There is no cash dividend on the latest confirmed filings, so profit growth rather than shareholder returns is the axis of assessment.

The history of an operating margin at 16.1 percent in 2022, sliding to 5.9 percent in 2024 and then recovering sharply from 2025, shows how much the company's profit level has swung with the cycle.

On top of that, warrants exercisable from March 2027 could increase the share count, so any per-share metric should be read with potential dilution in mind.

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

Bull factors

One of few suppliers in a vacated niche

TrendForce said major Korean and US memory suppliers were expected to sharply cut or stop LPDDR4X production in 2025 and 2026, creating a supply demand mismatch because many mobile processors are not compatible with the newest LPDDR5X.

As one of the few players built around this segment, Jeju Semiconductor has been positioned to capture price increases relatively fully.

Industry participants argue that even a temporary improvement in legacy profitability will not trigger added output because capacity is prioritized for high value products, implying supply constraints will not unwind quickly.

Operating margins of roughly 37 percent and 42 percent in the first and second quarters of 2026 are the quantitative result of that setup.

Profit leverage from a low fixed cost fabless model

Because it owns no fabs, capital spending needs are light and profit can rise faster than revenue when selling prices increase.

Operating profit went from KRW 4.3bn in the second quarter of 2025 to KRW 121.9bn in the second quarter of 2026, a far larger move than revenue's increase from KRW 51.1bn to KRW 289.9bn over the same span.

Analysts note that the absence of production lines keeps capital expenditure low while amplifying leverage during upturns. The same leverage, however, works in reverse when prices fall.

Mid-term volume secured at a domestic major's fab

Reports indicate the company signed an agreement to use SK hynix capacity for several years, with the site presumed to be the Wuxi plant in China. Some observers called it unusual for a major maker to allocate part of a production line externally during a severe shortage.

For a fabless firm, secured foundry volume effectively caps revenue, so this arrangement matters for mid-term capacity visibility. That said, mass production targets for its own designed parts are distant, around 2028 for LPDDR4X and 2030 for LPDDR5.

Bear factors

Much of the profit is tied to prices

The first half 2026 profit surge owes more to price spikes than to volume growth, so durability needs verification. SigmaIntell said tight consumer memory supply should persist for a time but that second half increases would gradually moderate as brands resist prices and adjust orders.

TrendForce noted that improving LPDDR5X supply could push its contract prices below LPDDR4X and that industry-wide upgrades would reduce LPDDR4X dependence, while the price surge is putting significant cost pressure on low and mid tier smartphones. The 2024 operating margin low of 5.9 percent illustrates the amplitude of this company's margins.

China and export concentration plus tariff variables

Per the 2025 annual report, overseas sales were 93.7 percent of revenue with China at 73.6 percent, a heavy regional concentration. That structure passes currency moves, trade rules and local demand swings straight through to earnings.

Commentators have also flagged uncertainty over how long pull-forward demand related to US semiconductor tariffs can last. Applications and customers are diversified, but regional concentration remains a separate risk.

Dilution potential and balance sheet shift

The bond with warrants issued in March 2026 carries an exercise price of KRW 44,300 per share with a 100 percent exercise ratio, covering 1,399,548 new shares, or 3.90 percent of shares already issued, and the floor for downward exercise price resets was set at KRW 31,050.

Warrants can be exercised from 23 March 2027 to 23 February 2031, bondholders may request early redemption from 23 March 2028, and the issuer may exercise a call option from 23 March 2027.

The debt-to-equity ratio also rose from 22.4 percent at end 2024 to 47.9 percent at end 2025, showing that funding and working capital burdens grew alongside the top line.

Risk factors

Cycle reversal risk

Prices for legacy and low-power memory are the product of supply cuts, so pricing power could weaken quickly if large makers rebalance output or rivals fill the gap. Observers have warned that pricing power may erode if large memory makers raise LPDDR4X output again or competitors move into the vacuum.

Annual operating margin has already travelled from 16.1 percent in 2022 to 5.9 percent in 2024, so profit could contract sharply on any margin normalization. If falling prices coincide with inventory valuation effects, earnings volatility would widen further.

Supply chain and foundry dependence

Owning no production lines keeps fixed costs low but leaves the company highly exposed to foundry capacity and costs. In a severe upcycle, securing wafers itself sets the revenue ceiling, and raw material funding needs rise with it.

That is reflected in the allocation of KRW 50.0bn of the bond-with-warrants proceeds to working capital for wafers and other raw materials tied to higher sales. With production spread across overseas fabs, geopolitical and trade rule changes also feed through.

Earnings quality and cash flow

Operating profit and net profit have repeatedly diverged, with non-operating items driving the bottom line: the second quarter of 2025 showed KRW 4.3bn of operating profit alongside a KRW 2.6bn net loss attributable to owners.

Conversely, net profit exceeded operating profit in the third quarter of 2025 and the first quarter of 2026.

Operating cash flow improved from negative KRW 9.7bn in 2024 to positive KRW 25.6bn in 2025 but still fell short of the KRW 39.5bn net profit attributable to owners, so cash conversion needs continued monitoring. During rapid revenue growth, rising receivables and inventory can delay cash generation.

What to watch next

Late October to early November 2026
Watch third quarter results and conference calls from Samsung Electronics and SK hynix for comments on legacy supply plans and pricing for DDR4 and LPDDR4X. Whether the majors restore output feeds directly into Jeju Semiconductor's pricing power.
Mid-November 2026
The key is whether the third quarter 2026 filing shows revenue and operating margin holding near first half levels of about 37 percent and 42 percent, and whether receivables, inventory and operating cash flow keep pace with reported profit. Shifts in the China revenue share and application mix are also worth checking.
During the fourth quarter of 2026
Check whether fourth quarter LPDDR4X and DDR4 contract price forecasts from firms such as TrendForce and SigmaIntell show a slowing rate of increase. Whether brand-level price resistance turns into actual order cuts can be an early signal for the company's margins.
Mid-March 2027
The 2026 annual report will confirm full year results, any change in dividend policy, China concentration and the funding structure. It is the first filing to reveal the shareholder return stance after a year of surging profit.
From 23 March 2027
The exercise window for the March 2026 bond with warrants opens and the issuer's call option also becomes available. Since the warrants cover 3.90 percent of shares already issued, share count changes and related disclosures warrant attention.

Overall view

Jeju Semiconductor is a rare fabless company built on memory, and its earnings have expanded dramatically in a short time by filling the low-power, low-density space vacated as large makers concentrated capacity on high value AI products.

On confirmed figures, revenue and operating profit of KRW 302.2bn and KRW 35.9bn in 2025 gave way to KRW 470.4bn and KRW 189.0bn in the first half of 2026, surpassing the prior full year in six months, with a second quarter operating margin of about 42 percent.

Bullish factors include structurally constrained legacy supply, the profit leverage of a low fixed cost model, and the plan to secure mid-term volume at an SK hynix fab.

Bearish factors include profit that is heavily tied to price spikes, heavy overseas and China concentration, and the potential for share count growth from warrants exercisable from March 2027.

The gap between profit and cash flow, and the history of non-operating items swinging the bottom line, also matter when judging earnings quality.

Ultimately the question is whether the margins seen in the first half hold from the third quarter onward, which narrows to two variables: the direction of contract prices and secured foundry volume. This report is for information purposes and contains no buy or sell opinion and no price target.

Sources

Korea Exchange (KRX) — Prices · Market Cap · Volume
FSS electronic disclosure system (DART) — Financial statements · Dividend filings

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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.