Q.S.I Co., LTD. (KOSDAQ:066310)

Market Cap	154.83B +92.8%
Revenue (ttm)	23.28B +9.0%
Net Income	2.52B -22.7%
EPS	282.00 -21.7%
Shares Out	8.84M
PE Ratio	62.09
Forward PE	n/a
Dividend	100.00 (0.74%)
Ex-Dividend Date	Dec 29, 2025

Volume	13,189,026
Average Volume	1,371,978
Open	20,500
Previous Close	17,510
Day's Range	17,510 - 22,750
52-Week Range	6,610 - 22,750
Beta	0.58
RSI	77.42
Earnings Date	May 14, 2026

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.

• Industry: Semiconductors
• Sector: Technology
• Founded: 2000
• Employees: 105
• Stock Exchange: KOSDAQ
• Ticker Symbol: 066310

Financial Performance

In 2025, Q.S.I Co., LTD.'s revenue was 23.28 billion, an increase of 8.98% compared to the previous year's 21.36 billion. Earnings were 2.52 billion, a decrease of -22.67%.