Ryuk-Il C&S육일씨엔에쓰

Ryuk-Il C&S swung to a trailing operating loss in H1 2026 despite a profit on net income, with a share price well above its 52-week low.

Ryuk-Il C&S is a small KOSDAQ electronics firm making tempered cover glass, fine chemicals and edutech products. Trailing twelve-month revenue is about ₩36.5B, but operating income is negative at about -₩1.3B, while net income is positive at about ₩3.4B. The shares closed at ₩1,689 on 2026-10-23, after a 42.1% gain over three months and a 4.7% fall over one month.

What stands out

• Trailing revenue is about ₩36.5B and the operating margin is -3.6%, so the core operations lost money even though net income was about ₩3.4B.
• Free cash flow is about -₩4.8B and borrowings are about ₩25.4B against cash of ₩1.9B, so debt is a notable feature of the balance sheet.
• Annual revenue rose 19.4% in 2025 to about ₩44.8B, but the operating loss widened to about -₩1.5B that year.
• Valuation looks low on trailing earnings (P/E 7.6, P/B 1.1) with no dividend, though the data does not explain why the market prices it this way.
• Recent filings are dominated by governance and capital events: a CEO change, a shareholder meeting, convertible preferred share conversions and a tangible asset acquisition decision.

What to watch

• Upcoming results and whether the operating loss narrows from the trailing -3.6% margin.
• Outcome of the convertible preferred share conversions and any amendments to those filings, which could affect share count.
• Details of the tangible asset acquisition and how it is financed given the debt level; the news list was empty, so no press coverage is available in the data.