PER, PBR and dividend yield are calculated from the latest confirmed results (EPS, BPS, dividend per share) and the current share price · Prices as of the 2026-11-06 close
EST, an electrostatic chuck maker for semiconductors and displays, closed its November 4, 2026 KOSDAQ debut below the offer price after falling to less than half of its intraday high.
The November 4, 2026 close was KRW 9,890, 20.24% below the KRW 12,400 offer price, after an intraday high of KRW 20,700 that was 66.94% above the offer price.
First-half 2026 revenue was KRW 23.1 billion and operating profit was KRW 475 million, a return to profit after three straight years of operating losses through 2025.
Display chucks account for roughly 75% of revenue, and recycled semiconductor chucks are the main growth driver cited by the company.
The company plans to lift semiconductor chuck capacity from KRW 20 billion to KRW 50 billion a year by the second quarter of 2027, and targets 2028 revenue of KRW 70 billion and operating profit of KRW 15.6 billion.
Korea Exchange designated EST as an investment caution stock on November 5, 2026, citing heavy net selling by a single account.
EST is a specialist in developing, manufacturing and refurbishing electrostatic chucks (ESCs), and it was founded in 2016.
An ESC holds a semiconductor wafer or display glass substrate in place inside vacuum equipment through electrostatic force. Performance degrades under high heat and plasma, so the part is a consumable that must be replaced or refurbished regularly, which creates recurring demand.
EST built its base in large-area display chucks and then extended into semiconductors. One report said about 76% of first-half 2026 consolidated revenue came from displays, and the company describes the mix as roughly 75% display and 25% semiconductor.
Samsung Display is the main display customer, and the company says it was the first in the world to develop and mass-produce 8.6-generation-class large-area bipolar chucks. The semiconductor business centers on refurbishing used chucks to restore their performance.
Japanese suppliers such as Shinko and NGK Insulators hold most of the new-chuck market, so EST entered through refurbished units first. A March 2025 QYResearch briefing named LK Engineering, MiCo and AEGISCO as key Korean players and listed EST among companies active in new and refurbished chucks.
EST is also developing glass core chucks for advanced packaging and OLEDoS chucks for ultra-high-resolution displays, and glass core revenue first appeared in the first half of 2026.
According to press reports, EST's 2025 consolidated revenue was KRW 35.418 billion, with an operating loss of KRW 70 million and net income of KRW 1.953 billion. One report said 2025 revenue grew 20.4% from the prior year. The company posted operating losses for three consecutive years through 2025.
In the first half of 2026 it reported revenue of KRW 23.1 billion and operating profit of KRW 475 million, returning to profit.
However, reports on the October 20, 2026 press briefing said preliminary July–August results showed an operating loss of KRW 1.8 billion, and the January–August cumulative result was an operating loss of KRW 1.4 billion.
Semiconductor chuck revenue was about KRW 7 billion in 2025, and the company said it had already secured 94.1% of its KRW 9.6 billion 2026 target.
The offering drew strong demand. The institutional book was 630.10 times covered, and the offer price was set at KRW 12,400, the top of the range. The retail subscription was 28.95 times covered with roughly KRW 98.7 billion in deposits. All 2.2 million shares were newly issued, raising about KRW 27.3 billion.
On the November 4, 2026 listing day, the stock opened at KRW 15,890, reached KRW 20,700 intraday, then reversed and closed at KRW 9,890, down 20.24%. Market capitalization at the close was KRW 137.8 billion and trading value was KRW 641.1 billion. Jkn (Jaekyung Ilbo) reported that no notable disclosure or confirmed negative news accompanied the decline.
The company has set targets of about KRW 39.4 billion in revenue for 2026, KRW 46.3 billion for 2027, and KRW 70 billion in revenue with KRW 15.6 billion in operating profit for 2028. Under the 2028 target, semiconductor chuck revenue reaches KRW 37.8 billion, or about 54% of the total.
To get there, it plans to put roughly KRW 19.4 billion of offering proceeds into facilities and KRW 3.7 billion into research and development, lifting semiconductor capacity from KRW 20 billion a year to KRW 50 billion by the second quarter of 2027.
Management said at the briefing that its semiconductor plant runs at about 100% utilization, while display capacity is to stay near KRW 25 billion. Refurbished chucks have received mass-production approval for 21 products at nine customers, and the goal is 57 cumulative approved products by 2028.
The company said it is in discussions with Samsung Electronics and SK hynix, but no contract has been confirmed. Glass core and OLEDoS products are at the joint development and customer evaluation stage, so the timing of any meaningful revenue contribution is uncertain.
The offer price was derived from 2028 estimated net income of about KRW 12.2 billion, discounted to present value and combined with peer price-earnings multiples, so delivery against that target is what the market will measure.
Room for operating margin improvement depends on how quickly newly approved products move into volume production and how fast new capacity is filled.
Japanese suppliers lead the new-chuck market, but EST entered first through refurbished units. By the company's account, refurbished chucks are cheaper than new ones and have shorter lead times. Of 22 products that completed evaluation, 21 were approved, an approval rate of 95.5%.
The company argues that chipmakers may buy more refurbished units for cost reasons even when the semiconductor cycle softens.
The company plans to raise semiconductor chuck capacity from KRW 20 billion a year to KRW 50 billion by the second quarter of 2027. It said at the briefing that the semiconductor plant runs at about 100% utilization.
About KRW 19.4 billion of offering proceeds is earmarked for equipment, so funding for the expansion is in place. If added capacity converts into sales, fixed-cost absorption could leave room for operating margin improvement.
The chief executive named full localization of electrostatic chucks as the ultimate goal. The company says it has internalized core technology from design to material manufacturing in both displays and semiconductors.
In glass core, it is co-developing with equipment makers, and a report said it completed an order for sintered chucks in October 2026. OLEDoS chucks are in customer evaluation, which keeps open the possibility of a broader product line.
EST posted operating losses for three straight years through 2025. The first-half 2026 profit was small, at KRW 475 million of operating profit. Reports said preliminary July–August results showed an operating loss of KRW 1.8 billion, leaving a January–August cumulative operating loss of KRW 1.4 billion.
The company explained that qualification tests take 18 months to two years, during which margins are structurally low.
The offer price was derived by discounting 2028 estimated net income of about KRW 12.2 billion to present value. That estimate depends on semiconductor sales growing in earnest. Semiconductor revenue was about KRW 7 billion in 2025, a wide gap from the KRW 37.8 billion target for 2028. If targets slip or fall short, the market may adjust its expectations.
Displays make up about 75% of revenue and Samsung Display is the main customer, so dependence on a single customer is high. Japanese suppliers such as Shinko and NGK Insulators hold most of the new semiconductor chuck market. Korean competitors such as LK Engineering and MiCo also exist. Supply to Samsung Electronics and SK hynix is still at the discussion stage and is not confirmed.
A weaker capital spending cycle in semiconductors and displays could affect replacement demand and the pace of new approvals. The company says refurbished demand can rise even in a downturn, but that is management's own view. The competitive balance with Japanese incumbents in new chucks may also shift with customers' cost policies.
For the expansion to turn into revenue, additional orders and enough production staff must follow. New-product evaluations take 18 months to two years, so approval delays could affect earnings targets. Glass core and OLEDoS remain in development and evaluation, so commercialization timing is uncertain.
Newly listed stocks tend to swing widely right after debut. EST's close on listing day was about 52% below its intraday high. Korea Exchange designated it an investment caution stock, citing among other things a net sale of 385,000 shares by one corporate account. If the designation is escalated to investment warning or investment risk, trading can be halted.
EST is a display-based chuck maker that has entered the refurbished semiconductor segment of a market led by Japanese suppliers. The bullish case rests on a 95.5% approval rate for refurbished chucks, planned semiconductor capacity expansion, and extension areas such as glass core and OLEDoS.
The bearish case rests on three straight years of operating losses, an operating loss in preliminary July–August 2026 results, an offer price built on 2028 targets, and concentration in display customers.
The stock moved sharply on listing day, from an intraday high of KRW 20,700 to a close of KRW 9,890, and no company-specific negative news was reported for the decline.
The investment caution designation by Korea Exchange is a procedural measure tied to heavy single-account trading and is not a judgment on the company's earnings.
The key operating indicators to watch are the pace of order wins after the expansion, the conversion of newly approved products into volume production, and quarterly operating profit. This material is for information only, and responsibility for any investment decision rests with the investor.
Report written 2026-11-05 · Data as of 2026-11-04
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.