JNB제이엔비

JNB's trailing results have swung to losses in 2026 after a profitable 2024, and the shares have fallen sharply over the past year.

JNB makes vacuum-pump-related equipment and precision machined parts for semiconductor plants, selling mainly in Korea. For the trailing twelve months to H1 2026 it reported revenue of about ₩15.4B, an operating loss of about ₩1.2B and a net loss of about ₩2.4B, with negative free cash flow of about ₩3.1B. The share price closed at ₩2,960 on 2026-10-23, down 62.8% over one year and near its 52-week low of ₩2,825.

What stands out

• Revenue has been broadly flat at roughly ₩15B to ₩16B across 2023 to 2025, but operating margin fell from 21% in 2024 to 1.2% in 2025 and turned negative on a trailing basis (-8%).
• Net debt-related pressure is visible: borrowings are about ₩23.7B against cash of about ₩3.7B, and liabilities are 80.4% of equity.
• The stock trades at about 0.8 times book value and 1.8 times sales, with a 3.4% dividend yield shown in the data; earnings-based multiples are not meaningful because earnings are negative.
• Foreign ownership fell from 1.4% to 0.9% over the past 60 days, and the 20-day investor flow data shows foreign net selling of about ₩54M against retail net buying of about ₩68M.
• Recent filings include the H1 2026 half-year report (filed 2026-08-14), a corporate value-up plan (2026-03-26), and insider and 5%+ holding reports filed in August 2026. No news headlines were included in the data.

What to watch

• The next quarterly and annual results, to see whether the operating loss narrows and whether free cash flow improves from the current negative level.
• Debt levels against cash, since borrowings are well above cash on the latest figures.
• Insider and major-holder share activity, plus the executive trading plan filed in July 2026, as the filings are the only shareholder-related disclosures listed in the data.