Seoul Viosys

서울바이오시스 · 092190

Information Technology Semiconductors · KOSDAQ

Small-cap

Market cap US$369.3M (₩509.6B)

Overview

Seoul Viosys makes light-emitting semiconductor components, tiny chips and modules that produce ultraviolet, visible, and infrared light for uses ranging from water and air sterilisation to display backlighting, automotive lighting, and precision sensing.

Its products supply manufacturers across industries worldwide, from consumer electronics and medical devices to data-centre optical communications. Listed on KOSDAQ, Korea's tech-focused stock exchange, the company holds a broad portfolio of optical semiconductor technologies protected by thousands of patents, spanning products from individual chips through to finished modules.

Summary is AI-generated and may contain errors · figures from DART filings

Financials

Source: DART · FY ending Dec · latest FY2025

Revenue · FY2025

US$553.5M

▲ +9.2% YoY

Operating profit · FY2025

US$163.6K

▼ −93.5% YoY

Net income · FY2025

−US$9.9M

Turned to loss

Revenue, operating profit and net income by fiscal year (USD; KRW in parentheses).
Metric	FY2023	FY2024	FY2025
Revenue	US$365.2M(₩504B)	US$506.7M(₩699.2B)	US$553.5M(₩763.8B)
Operating profit	−US$52.9M(−₩72.9B)	US$2.5M(₩3.5B)	US$163.6K(₩225.8M)
Net income	−US$73.7M(−₩101.7B)	US$13.1M(₩18.1B)	−US$9.9M(−₩13.6B)

Revenue

FY2023US$365.2M
FY2024US$506.7M
FY2025US$553.5M

Operating profit

FY2023−US$52.9M
FY2024US$2.5M
FY2025US$163.6K

Net income

FY2023−US$73.7M
FY2024US$13.1M
FY2025−US$9.9M

Key ratios (FY2025)

ROE

-8.0%

Debt/Eq

322.5%

Op. margin

0.0%

Net margin

-1.8%

Rev. YoY

▲ +9.2%

Why it matters

The company operates six global R&D centres and three consolidated subsidiaries located in the United States, Vietnam, and China, which handle customised production and global supply.

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