Sejin T S
Daily close in US$ at the latest USD/KRW close. Source: KRX via FinanceDataReader.
Sejin T S makes the thin optical films, including reflective, protective, diffusion, and prism sheets, that sit inside LED and LCD flat-panel displays and control how light is spread and shaped on screen.
The company supplies these components to major display manufacturers and their related production partners in the television and monitor supply chain. Listed on KOSDAQ, Korea's tech-focused small-cap board, it operates through a parent company and a subsidiary, Sejin Optical, whose combined revenue is directly tied to the cyclical demand patterns of the global display industry.
Summary is AI-generated and may contain errors · figures from DART filings
The filing names Sejin Optical as a subsidiary, meaning the consolidated business spans more than one legal entity within the same display-components supply chain.
Sejin T S in five facts
What does Sejin T S do?
Sejin T S makes the thin optical films, including reflective, protective, diffusion, and prism sheets, that sit inside LED and LCD flat-panel displays and control how light is spread and shaped on screen.
Where is Sejin T S listed and in which sector?
Sejin T S (Korean name: 세진티에스) trades under KRX code 067770 on KOSDAQ, the Korea Exchange's board for smaller and growth companies. It is classified in the Information Technology sector, Components.
How large is Sejin T S?
Its market capitalisation was US$6.5M on 2026-10-21, which puts it in this site's small-cap group. US$ amounts are converted from won at 1 USD ≈ ₩1,325 (2026-10-21).
What were Sejin T S's latest annual revenue and operating profit?
For fiscal year 2025, Sejin T S reported revenue of US$9M, an operating loss of US$156.4K and net income of US$538.9K, per its annual report on DART (data retrieved from DART on 2026-06-04). Revenue was down 9.7% on the previous year.
Where does this data come from?
Financial statements and filings come from DART, Korea's official corporate-filing system. Share prices, market capitalisation and trading status come from KRX. Company summaries are AI-generated from the filings and may contain errors; financial figures are mapped directly from DART.
Data sources and last updated
- Filings and financial statements
- DART (dart.fss.or.kr), Korea's official corporate-filing system
- Prices, market cap, trading status
- KRX (Korea Exchange), via FinanceDataReader
- Latest annual financials
- Fiscal year 2025, data retrieved from DART on 2026-06-04
- Share price and market cap
- Close of 2026-10-21
- Currency
- US$, converted from won at 1 USD ≈ ₩1,325 (2026-10-21 close)
- Company data updated
- 2026-10-21
- Company summary
- AI-generated from filings; may contain errors. Information only, not investment advice.
- Other market noticeOct 7
- Other market noticeOct 2
- Trading suspensionOct 2
- Trading suspensionSep 23
- Other market notice (delisting risk notice: market cap below threshold)Sep 16
- Other market notice (delisting risk notice: market cap below threshold)Sep 9
- [Amended] Material event report (treasury share acquisition)
Sejin T S updated a disclosed plan to buy back its own shares worth US$732K, about 11.6% of its market value.
Treasury Shares · Aug 31 · 2 versions - [Amended] Treasury share acquisition: results report
Sejin T S Co., Ltd. amended its treasury share buyback results to add trades through August 28, 2026, raising the total acquired from 697,719 to 700,805 common shares and the total acquisition amount from US$1,186,442 to US$1,192,364, still below the 1,000,000 shares originally planned.
Treasury Shares · Aug 28 · 2 versions - [Amended] Material event report (treasury share acquisition)
Sejin TS amended its July 31, 2026 treasury-share acquisition disclosure after discovering that brokerage purchase fees had been included within the acquisition amount, leaving part of the originally approved funds unused; the company will complete additional purchases, correct the results report, and resolve a new acquisition decision by no later than September 2, 2026.
Treasury Shares · Aug 27 · 2 versions - Material event report (treasury share acquisition)
Sejin T S disclosed a plan to buy back its own shares worth US$1.16M, about 19.0% of its market value.
Treasury Shares · Jul 31 - Change of 30% or more in revenue or profit/loss structure (15% for large companies)
Sejin T S reported consolidated results for FY2025: revenue of US$8.13M (−9.7% year on year), an operating loss of US$142K (from a profit a year earlier) and net income of US$391K (−81.7% year on year).
Earnings · Feb 9