QSI Co Ltd (066310)

Currency in KRW
5,790
+20(+0.35%)
Closed·
Trading near 52-week Low
066310 is not included in our AI-picked strategies. See which stocks are.
Fair Value
Day's Range
5,3606,060
52 wk Range
5,36022,750
Key Statistics
Bid/Ask
5,770.00 / 5,790.00
Prev. Close
5,770
Open
5,360
Day's Range
5,360-6,060
52 wk Range
5,360-22,750
Volume
54.62K
Average Volume (3m)
232.12K
1-Year Change
-28.0745%
Fair Value
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Fair Value Upside
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066310 Scorecardpro icon
Company’s Health
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Fair Value
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Fair Price
Upside
Analysts Sentiment
Currently not supported.
Members' Sentiments
Bearish
Bullish
ProTips
Trading at a low Price / Book multiple

Technical Analysis

Summary
Strong Sell
Sell
Neutral
Buy
Strong Buy
Strong Sell
Technical Indicators
Strong Sell
Moving Averages
Strong Sell

Earnings

Latest Release
May 14, 2026
EPS / Forecast
248.00 / --
Revenue / Forecast
6.14B / --
EPS Revisions
Last 90 days

Dividends

Payout Ratio
Payout ratio (TTM)
Earnings retained
EPS 508.41%
Dividend Yield
1.73%
Industry Median 0.18%
Annualised payout
100.00
Paid annually
5-Years Growth
+14.87%
Growth Streak

066310 Income Statement

Compare 066310 to Peers and Sector

Metrics to compare
066310
Peers
Sector
Relationship
P/E Ratio
11.2x8.5x12.2x
PEG Ratio
0.070.030.01
Price/Book
0.6x0.7x2.4x
Price / LTM Sales
2.1x1.2x2.2x
Upside (Analyst Target)
-126.3%42.7%
Fair Value Upside
Unlock43.4%10.4%Unlock

Q.S.I Co., LTD. develops, manufactures, and sells red and infra-red laser diodes in South Korea and internationally. The company also provides foundry services, that includes Epi wafers, wafer foundry services, and package services. Its laser diodes are used in power tools, medical, motion recognition, laser printers, lidar, and various sensors. The company was founded in 2000 and is based in Cheonan-si, South Korea.

Ownership

Ownership Overview

Type
Common Stock Held% of Shares OutstandingMarket Value
Mutual Funds & ETFs
0.000.00%0.00
Other Institutional Investors
3.27M37.01%18.88B
Public Companies & Retail Investors
5.57M62.99%32.14B
Total
8.84M100.00%51.02B

Top Holders

Holder
% of holding
Shares Held
Date Reported
Value (In 1,000s)
Samhwa Yangheng Co. Ltd32.46%2,870,52816,562,947
The Korea Securities Finance Corporation4.54%401,6492,317,515

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FAQ

What Is the QSI (066310) Stock Price Today?

The QSI stock price today is 5,790 KRW.

What Stock Exchange Does QSI Trade On?

QSI is listed and trades on the KOSDAQ.

What Is the Stock Symbol for QSI?

The stock symbol for QSI is "066310."

What Is the QSI Market Cap?

As of today, QSI market cap is 51.02B KRW.

What Is QSI's Earnings Per Share (TTM)?

The QSI EPS (TTM) is 508.

From a Technical Analysis Perspective, Is 066310 a Buy or Sell?

Based on moving averages and other technical indicators, the daily buy/sell signal is Strong Sell.

How Many Times Has QSI Stock Split?

QSI has split 0 times.

How Many Employees Does QSI Have?

QSI has 105 employees.

What is the current trading status of QSI (066310)?

As of Jul 30, 2026, QSI (066310) is trading at a price of 5,790 KRW, with a previous close of 5,770 KRW. The stock has fluctuated within a day range of 5,360 KRW to 6,060 KRW, while its 52-week range spans from 5,360 KRW to 22,750 KRW.
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