JT
Daily close in US$ at the latest USD/KRW close. Source: KRX via FinanceDataReader.
JT makes the machines that test semiconductor chips after they are packaged, equipment such as test handlers and burn-in sorters that check whether finished chips work correctly before they leave the factory.
Its customers include major global memory chipmakers, and it also supplies equipment to outsourced semiconductor assembly and test (OSAT) companies worldwide. Listed on KOSDAQ, Korea's tech-focused small-cap board, the company's core business is back-end semiconductor test equipment, and it is expanding into laser processing equipment and automotive electronics testing as additional product lines.
Summary is AI-generated and may contain errors · figures from DART filings
JT is collaborating with partners to jointly develop and commercialize wafer probe station equipment, broadening its product range beyond its established handler business.
JT in five facts
What does JT do?
JT makes the machines that test semiconductor chips after they are packaged, equipment such as test handlers and burn-in sorters that check whether finished chips work correctly before they leave the factory.
Where is JT listed and in which sector?
JT (Korean name: 제이티) trades under KRX code 089790 on KOSDAQ, the Korea Exchange's board for smaller and growth companies. It is classified in the Industrials sector, Machinery.
How large is JT?
Its market capitalisation was US$43.1M on 2026-10-21, which puts it in this site's small-cap group. US$ amounts are converted from won at 1 USD ≈ ₩1,325 (2026-10-21).
What were JT's latest annual revenue and operating profit?
For fiscal year 2025, JT reported revenue of US$29M, an operating loss of US$1.7M and a net loss of US$294.2K, per its annual report on DART (data retrieved from DART on 2026-09-17). Revenue was down 22.5% on the previous year.
Where does this data come from?
Financial statements and filings come from DART, Korea's official corporate-filing system. Share prices, market capitalisation and trading status come from KRX. Company summaries are AI-generated from the filings and may contain errors; financial figures are mapped directly from DART.
Data sources and last updated
- Filings and financial statements
- DART (dart.fss.or.kr), Korea's official corporate-filing system
- Prices, market cap, trading status
- KRX (Korea Exchange), via FinanceDataReader
- Latest annual financials
- Fiscal year 2025, data retrieved from DART on 2026-09-17
- Share price and market cap
- Close of 2026-10-21
- Currency
- US$, 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.
- Supply contract signed
JT disclosed a supply contract with Micron Semiconductor Technology India Private Limited (SEZ Unit), worth US$4.22M, about 14.79% of its recent annual revenue, running through Mar 2027.
Supply contract · Oct 16 - [Amended] Supply contract signed
JT updated a previously disclosed supply contract with Samsung Electronics, now worth US$10.7M, about 43.04% of its recent annual revenue, running through Dec 2026.
Supply contract · Jul 2 · 2 versions - Supply contract signed
JT disclosed a supply contract with Samsung Electronics, worth US$5.2M, about 20.42% of its recent annual revenue, running through Dec 2026.
Supply contract · May 19 - Change of 30% or more in revenue or profit/loss structure (15% for large companies)
JT reported consolidated results for FY2025: revenue of US$26.5M (−22.64% year on year), an operating loss of US$1.32M (from a profit a year earlier) and a net loss of US$616K (from a profit a year earlier).
Earnings · Feb 12