WiSoL와이솔

WiSoL returned to a trailing loss in 2026 on falling revenue, with its shares well off their 52-week high.

WiSoL makes RF filters and modules for mobile phones, sold mostly abroad, plus probe card parts for chip testing. Trailing twelve-month revenue is ₩336B with an operating loss of ₩3.4B and a net loss of ₩12.4B, after a 2025 loss of ₩41.4B on revenue of ₩321B. The shares closed at ₩6,370, around 32% below the 52-week high of ₩9,340.

What stands out

• 2025 revenue fell 14.3% to ₩321B and operating margin dropped to -11.3%, after a small profit in 2024 and a ₩13.5B operating profit in 2023.
• Trailing cash of ₩31B is set against borrowings of ₩27B, and trailing free cash flow is negative at about -₩10B.
• Trailing liabilities are 25.6% of equity, and the price-to-book ratio is 0.6, with the shares trading below book value.
• The dividend yield is shown as 7.8%, but the data does not say how this is paid or whether it is sustainable given recent losses.
• Foreign ownership fell from 11.3% to 9.3% over the past 60 days, and 20-day net flows were small sells across foreign, institutional and retail investors.
• Recent filings are mostly routine, including insider and 5%+ holding reports, plus an August decision to terminate a trust agreement for share buybacks and a share cancellation decision.

What to watch

• The next half-year or annual results, to see whether the trailing losses narrow or widen.
• Follow-up on the share cancellation decision and the terminated buyback trust, which the data does not explain further.
• Executive and major shareholder trading plans and holding reports, which could signal changes in insider or large-holder positions.