아이에스티이

212710KOSDAQView the 반도체 sectorTheme Semiconductors & electronics

5,180KRWMarket close of 10/20 (Tue)

Down -3.18%-170KRWMarket close of 10/20 (Tue)

Preliminary value right after the close — replaced by official KRX data tomorrow morningClose of 10/21 (Wed)5,230KRWUp +0.97%

Preliminary · just after the close · replaced by official KRX data tomorrow morning

Open: 5,350
High: 5,490
Low: 5,070
Day range: Day range low 5,070 high 5,490, open 5,350, close 5,180, previous close 5,350
Volume: 4×10K shares
: 188.61 million KRW 0.36× the 20-session average

Market close of 10/20 (Tue)

Where it sits in the 1-year range

2% of the way up from the lowest close in 1 year (252 sessions) · -64.1% from the high

Something to check

1 to check: operating loss

Free · no sign-inSource from 2021-05-17

Points to check

Earningsto check-5.6B KRWOperating income over the last four quarters -5.6B KRW (loss)Operating income, 5 quarters
Recent filingsnot verifiedOutside filing data coverage, so not verified
Foreign & institutionalnot verifiedOutside investor-flow coverage, so not verified

The other 3 are within the usual range

Daily move-3.18%usual range
Trading value0.4×usual range
Data date10/20 (Tue)Market close

See the full check report

Key figures

: 50.3B KRW
: Not computed — loss-making, or the four quarters are incomplete
: 2.30×
: 9,714,978 shares
Trading value ratio: 0.36× the 20-session average0.4×

52-week closing rangeNow 5,180

5,00014,420

Financials filed 2026-05-14 · KRX·DART

Something to check

1 to check: operating loss

Earningsto checkQuarterly operating income bars (5); the four dark bars make up the sum-5.6B KRW
Recent filingsnot verifiedOutside filing data coverage, so not verified
Foreign & institutionalnot verifiedOutside investor-flow coverage, so not verified
Daily moveusual range-3.18% on the reference date, placed against the usual ±3.35% band0.9×
Trading valueusual range0.36× the 20-session average0.4×
Data dateusual rangeMarket close data of 2026-10-20

Quarterly results · Q1 2026

Source: DART financials (Q4 derived as annual − three quarters)

Revenue6.4B KRWRevenue bars for the last 5 quarters; the dark bar is this quarter
vs. year ago
-38.2%
vs. prior quarter
-51.9%
Operating income534.87 million KRWOperating income bars for the last 5 quarters; the dark bar is this quarter
vs. year ago
+74.5%
vs. prior quarter
Turned profitable
Operating margin8.4%Operating margin bars for the last 5 quarters; the dark bar is this quarter
vs. year ago
+5.4 pp
vs. prior quarter
+39.8 pp

Quarterly operating income trend

As of the latest official close · 2026-10-20Valuation filing date · 2026-05-14

2025Q1 306.59 million KRW2026Q1 534.87 million KRWQ4 values are derived as the annual figure minus Q1–Q3. The value table marks them in the Type column.

Same sector · 반도체

· 7 of 71 stocks up, preferred shares excluded · trading value 8.56 trillion KRW

Same sector · top by trading value
Stock	20D	Change	Trading value
SK하이닉스	Close over the last 20 sessions -30.5%	Down -4.23%	4,231.2B KRW
삼성전자	Close over the last 20 sessions -16.6%	Down -2.98%	3,515.9B KRW
하나마이크론	Close over the last 20 sessions +8.0%	Down -4.31%	41.4B KRW
제주반도체	Close over the last 20 sessions -7.7%	Down -4.62%	41.3B KRW
DB하이텍	Close over the last 20 sessions -19.5%	Down -5.72%	29.7B KRW

Schedule

Next data 10/22 (Thu) after 08:50

Investor flows, financials and valuation are provided for 369 stocks. These stocks account for about 81% of trading value, about 92% of market capitalisation. Coverage status →

For information only, not a solicitation to invest. Investment decisions and their results are your own responsibility.