[Best & Worst] Ahnlab Soars 50% on Financial Sector Hacking; Genians and Seoul Semiconductor Also Up
Predicted impact: Low
Market-roundup mention of a rise; rare-earth-free LED story was already reported in recent days.
Seoul Semiconductor서울반도체
046890 · KOSDAQ · ₩046890 · 서울반도체
₩11,640▲ ₩440 (3.93%)End-of-day · Oct 30, 2026 · End-of-day prices.
Price · 1Y +82.45%
- Market cap
- ₩679B
- Enterprise value
- ₩758B
- P/E
- —
- P/B
- 1.0×
- Dividend yield
- 0.0%
- ROE
- −0.3%
- Net margin
- −0.2%
Trailing 12 months from filed financial statements, as of H1 2026. Dividend yield: the 2025 dividend per share from the annual report ÷ today's price.
52-week range−38.6% from the high
₩5,730Today: ₩11,300 – ₩13,710₩18,960
Returns
- 1W+42.6%
- 1M+12.4%
- 3M+36.8%
- 6M−29.5%
- YTD+87.4%
- 1Y+82.4%
- Volume today
- 5,630,669
- 24.6× the 20-day average
- Traded today
- ₩70B
- Listed shares
- 58,305,400
- EPS (12 months)
- −₩29
- Earnings yield −0.2%
AI researchResearch being writtenOur AI is writing a report on this company from filed data, prices and news. Check back soon.
Upcoming dates
Full calendar →🎁 Gift this stock
Send a friend ₩100,000 of paper money in this stock. They get it when they join.
Why is it moving?
+3.9% on Oct 30, 2026. Trading value 31.0× its normal.
Seoul Semiconductor shares rose in recent sessions, and articles name it among stocks that gained while US tech stocks fell. One report credits its rare-earth-free LED products for the strength.
AI summary of the news and filings linked. It can be wrong; check them.
- [Best & Worst] Ahnlab Soars 50% on Financial Sector Hacking; Genians and Seoul Semiconductor Also Up (Etoday)
- [Stock Spotlight] Seoul Semiconductor strong despite US tech sell-off with 'rare-earth-free LED' (Etoday)
- [Hit! Big Feeling] Mercury, Seoul Semiconductor, HVM: Are these stocks showing good signs for a big rally tomorrow? (Money Today)
- • Foreign investors sold a net ₩10B that day
- • Buzz 80 on JONBUR: heavy trading
Possible reasons, not certainties. Not financial advice.
Signals
Buzzing- BuzzHighBuzz 80: heavy trading.
- SentimentPositiveNews: Recent coverage is mostly about share price gains rather than company news. Community: 0 bullish, 0 bearish posts this week.
- MomentumStrong11.4% over the last month; the price is above its 20-day average.
- News impactSome10 news items and filings in two weeks; 0 rated high impact, 3 medium.
Signals describe activity, not recommendations. Not financial advice.
Leveraged ETF flows
Estimated leveraged-ETF rebalance on Oct 30: sell ₩522M at the close (22.8% of 20-day average trading value)
On its 20 biggest days of the last 60 (moves of 3%+), the estimated pressure averaged 4.6% of trading value and pointed the same way 3 of 20 times.
- 2× KODEX KOSDAQ150 Leverage −₩450M
- -1× KODEX KOSDAQ150 Futures Inverse −₩31M
- 2× TIGER KOSDAQ150 Leverage −₩29M
- 2× RISE KOSDAQ150 Futures Leverage −₩8.4M
- -1× TIGER KOSDAQ150 Futures Inverse −₩1.6M
Mostly via futures: index funds hedge with KOSPI 200 / KOSDAQ 150 futures, spread here over the index's largest members by market value.
Final after the close. An intraday "if the close were now" estimate needs real-time prices, which we don't have yet.
Estimate based on ETF size and daily moves; actual trades may differ.
ETFs holding this
All ETFs →Held by 11 funds.
- ACE KOSDAQ 1500.3%
- HANARO KOSDAQ1500.3%
- IBK KOSDAQ1500.3%
- KIWOOM KOSDAQ1500.3%
- KODEX KOSDAQ1500.3%
- KODEX KOSDAQ150 Leverage2×0.3%
- PLUS KOSDAQ1500.3%
- RISE KOSDAQ1500.3%
Estimated from the funds' index or underlying stock.
Seoul Semiconductor stock overview
Seoul Semiconductor (서울반도체, KRX: 046890) is listed on KOSDAQ, in the Semiconductors sector. Its shares closed at ₩11,640 on Oct 30, 2026, up 3.93% on the day, giving it a market value of ₩679B.
Key facts
- Market cap
- ₩679B
- Sector
- Semiconductors
- Latest price change
- +3.93%
- As of
- Oct 30, 2026
Quick answers about Seoul Semiconductor
- What is the market cap of Seoul Semiconductor?
- The market capitalisation of Seoul Semiconductor was ₩679B at the close on Oct 30, 2026.
- Who are the largest shareholders of Seoul Semiconductor?
- According to the latest official filings, the largest reported holders are VANGUARD TOTAL INTERNATIONAL STOCK INDEX FUND (0.99%, as of Jul 31, 2026); VANGUARD DEVELOPED MARKETS INDEX FUND (0.66%, as of Jun 30, 2026); EMERGING MARKETS CORE EQUITY 2 PORTFOLIO (0.41%, as of Jul 31, 2026).
- When is the next earnings report from Seoul Semiconductor?
- Korean companies rarely announce results dates in advance. Based on when Seoul Semiconductor filed the same report in past years, its next 3q results is expected around Nov 14, 2026.
- Does the National Pension Service own Seoul Semiconductor?
- Yes. The National Pension Service held 0.27% of Seoul Semiconductor shares as of Dec 31, 2025.
Company profile
Loading data for this company — check back soon
- Korean name
- 서울반도체
- Sector
- Semiconductors
- CEO
- 이정훈, 김홍민
- Founded
- Mar 1987
- Listed
- Jan 2002
- Listed shares
- 58,305,400
- Fiscal year ends
- Month 12
- Website
- www.seoulsemicon.com
Similar companies
- SK hynix000660 · ₩1,036T₩1,418,000−7.08%
- DB HiTek000990 · ₩4T₩92,000−7.07%
- Fadu440110 · ₩2.3T₩46,150−7.42%
- Hana Micron067310 · ₩2.2T₩33,400−9.97%
- Jeju Semiconductor080220 · ₩2.2T₩64,100−8.82%
- SFA Semicon036540 · ₩1.3T₩8,100−8.58%
- Hana Materials166090 · ₩959B₩48,500−6.19%
- HD Hyundai Energy Solutions322000 · ₩831B₩74,200−5.72%
Recent news
[Stock Spotlight] Seoul Semiconductor strong despite US tech sell-off with 'rare-earth-free LED'
Predicted impact: Low
Rare-earth-free LED technology is a product announcement with no revenue size given.
[Hit! Big Feeling] Mercury, Seoul Semiconductor, HVM: Are these stocks showing good signs for a big rally tomorrow?
Predicted impact: Low
Recent filings
See all- Preliminary earnings (consolidated)Oct 14, 2026
- Decision on Guarantee of Debt for Another PartySep 11, 2026
- Half-year report (Jun 2026)Aug 14, 2026
- Earnings Outlook on Consolidated Financial Statements (Fair Disclosure)Aug 11, 2026
- Amended: Preliminary earnings (consolidated)Aug 11, 2026
Titles in Korean until English translations are added.
Also known as: Seoul Semiconductor / 서울반도체 / 046890 / KRX:046890
Source: KRX statistical information