QSI Co

QSI Co Diluted EPS

The Diluted Earnings per Share of QSI Co (066310.KQ) as of Oct 15, 2026 is 304.06 KRW. In the previous year, Diluted Earnings per Share was 393.22 KRW — a change of -22.67% (lower).

Diluted EPS

304.06KRW

YoY

-22.67%

Last updated:

Diluted Earnings per Share of QSI Co is 2025 304.06 KRW. Diluted Earnings per Share of QSI Co was 2024 393.22 KRW. It decreases by -22.67% lower compared to the previous year.

The QSI Co Diluted EPS history

  • 3 Years

  • 10 Years

  • 25 Years

  • Max

Diluted EPS
Date
Diluted EPS
Jan 1, 2018
-43.69 KRW
Jan 1, 2019
133.45 KRW
Jan 1, 2020
16.42 KRW
Jan 1, 2021
188.38 KRW
Jan 1, 2022
847.05 KRW
Jan 1, 2023
327.72 KRW
Jan 1, 2024
393.22 KRW
Jan 1, 2025
304.06 KRW
The QSI Co Diluted EPS history
YEARDiluted EPSYoY
304.06KRW-22.67%
393.22KRW+19.98%
327.72KRW-61.31%
847.05KRW+349.65%
188.38KRW+1,047.42%
16.42KRW-87.70%
133.45KRW-405.42%
-43.69KRW-147.77%
91.47KRW-46.66%
171.47KRW+2.43%
167.39KRW-56.52%
385.02KRW—

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QSI Co Stock analysis

What does QSI Co do? QSI Co Ltd, listed on the Korean stock market with ticker 066310.KQ and ISIN KR7066310004, is a company based in Cheonan, South Korea. It operates within the Information Technology sector, specifically in the Semiconductors industry. The company went public on November 24, 2006. QSI Co Ltd manufactures and sells semiconductor laser and optical semiconductor products. Its product portfolio includes laser diodes (LDs) used in various applications such as power tools, laser modules, barcode scanners, laser beam printers, optical pickup units for DVDs and CDs, and other sectors including medical equipment and sensors. The company markets its products under the brand name QSI Laser Diode. It serves both domestic and international markets, with notable clients including Fuji Xerox, Panasonic, Samsung, and Stabila. The company's website is http://www.qsilaser.com, providing further information about its products and services. QSI Co Ltd focuses on the production and distribution of optical semiconductor solutions, targeting a range of industries that require precision optical components. QSI Co is one of the most popular companies on Eulerpool.

Frequently Asked Questions about QSI Co stock

Diluted Earnings per Share of QSI Co is 304.06 KRW in 2025.

Diluted Earnings per Share of QSI Co changed from 393.22 KRW to 304.06 KRW, representing a -22.67% change. The value is lower than the previous year.

On Eulerpool you can find the complete historical development of Diluted Earnings per Share QSI Co since 2006 – with annual values, charts, and detailed analysis.

Diluted EPS accounts for all potential shares from options, warrants, and convertible securities. It provides a more conservative per-share earnings measure.

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Income Statement — QSI Co

All Key Metrics — QSI Co