Global /South Korea /Technology /Semiconductors /066310

Q.S.I Co., LTD.

066310

• KRX: 066310 • Delayed

15,340KRW 1.1%

10.10 USD

As of 14 June 2026, Q.S.I Co., LTD. has a market cap of $88.2M USD, ranking #26432 globally and #1323 in South Korea. It ranks #3939 in the Technology sector, and #592 in the Semiconductors industry.

Global Rank

26432

Country Rank

1323

Sector Rank

3939

Industry Rank

592

Key Stats

Market Cap

$88.2MUSD

134.14B KRW

Enterprise Value

$70.84MUSD

107.55B KRW

Revenue (TTM)

$15.31MUSD

23.28B KRW

EBITDA (TTM)

$1.79MUSD

2.72B KRW

Net Income (TTM)

$1.65MUSD

2.52B KRW

EBITDA Margin

12%

Profit Margin

11%

PE Ratio

53.8

PS Ratio

5.8

PB Ratio

1.5

EV/EBITDA

39.8

Company Profile

Country (HQ)

South Korea

Sector

Technology

Industry

Semiconductors

CEO

Cheong-Dae Lee open_in_new

Employees

105

Founded

2000

Website

qsilaser.com open_in_new

warningChart data may be delayed

1d	1w	1m	3m	6m	YTD	1y	3y	5y
1.1%	2.2%	28%	79%	110%	104%	83%	57%	-6.6%

News

Markets

Exchange	Ticker	Price	Quotes
Korea Exchange (KRX) MIC: XKRX PRIMARY	066310 (주)큐에스아이 ISIN: KR7066310004 Shares Out.: Shares Outstanding: 9.063M¹ Shares Float: 5.896M² TV: TradingView: KRX: 066310 SA: Stock Analysis: KRX: 066310 YF: Yahoo Finance: 066310.KS GF: Google Finance: KRX: 066310 BA: Barron's: 066310 MS: Morningstar: XKRX: 066310	15,340 KRW	TV: TradingView: KRX: 066310 SA: Stock Analysis: KRX: 066310 YF: Yahoo Finance: 066310.KS GF: Google Finance: KRX: 066310 BA: Barron's: 066310 MS: Morningstar: XKRX: 066310

¹Market cap is calculated using shares outstanding.

²Float shares are publicly tradable shares, excluding insider-held stock.

About Q.S.I Co., LTD.

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.

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Industry: Semiconductors (South Korea)

Name	Market Cap (USD) diff.	PE	Country
SK hynix Inc. KRX: 000660	$595.66B 905.88T KRW 675K%	12.1	South Korea
Samsung Electro-Mechanics Co., Ltd. KRX: 009150	$40.19B 61.12T KRW 45K%	88.3	South Korea
LEENO Industrial Inc. KRX: 058470	$5.57B 8.47T KRW 6K%	318.2	South Korea
Hanwha Solutions Corp. KRX: 009830	$5.39B 8.19T KRW 6K%	-	South Korea
DB HiTek CO., LTD. KRX: 000990	$4.07B 6.2T KRW 5K%	24.6	South Korea
ISC Co., Ltd. KRX: 095340	$3.28B 4.99T KRW 4K%	90.7	South Korea

Industry: Semiconductors (Global)

Name	Market Cap (USD) diff.	PE	Country
NVIDIA Corp. NASDAQ: NVDA	$5.09T 6M%	42.7	United States
Broadcom Inc. NASDAQ: AVGO	$1.92T 2M%	77.9	United States
Taiwan Semiconductor Manufacturing Company Ltd. TWSE: 2330	$1.79T 56.53T TWD 2M%	29.6	Taiwan
Micron Technology, Inc. NASDAQ: MU	$584.68B 663K%	24.4	United States
Advanced Micro Devices, Inc. NASDAQ: AMD	$549.6B 623K%	123.8	United States
ASML Holding N.V. AMS: ASML	$521.25B 450.99B EUR 591K%	45.3	Netherlands

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