Jeio제이오

Jeio's trailing revenue and profit have fallen sharply, leaving it loss-making, with the share price down about 51% over the past year.

Jeio, a Korean carbon nanotube and plant engineering company, reported a trailing twelve-month operating loss of ₩8.0B on revenue of ₩41.3B as of H1 2026. Revenue has dropped from ₩114.5B in 2023 to ₩55.2B in 2025, and the company remains loss-making with ₩27.2B in borrowings against ₩7.2B of cash. The data does not include a fair value estimate or forward forecasts.

What stands out

• Trailing operating margin is -19.3% and net margin is -15%, so losses have deepened compared with the 2025 full-year operating margin of -7.7%.
• 2023 was the outlier year, with a ₩17.4B net profit on a 69% revenue jump; 2024 and 2025 both returned to losses with falling sales.
• Free cash flow is negative at -₩3.8B on a trailing basis, and borrowings are about 21% of equity.
• The stock trades at 0.8 times book value and 3.3 times sales, with no earnings-based multiples because earnings are negative; it pays no dividend.
• Filings in 2026 include a major sales or supply contract (April 8, later amended April 20), a half-year report and a quarterly report; the data shows no news headlines.

What to watch

• The next results and filings, including updates on the major supply contract and whether revenue stabilises after the 2024 and 2025 declines.
• Whether operating losses narrow, given trailing operating income of -₩8.0B and negative free cash flow.
• Repeated insider shareholding reports in April and May 2026, and the sharp 1-year share price fall from a 52-week high of ₩15,840 to ₩4,320.