LS Marine SolutionLS마린솔루션

LS Marine Solution's Q3 operating profit jumped 235%, but trailing margins are thin, free cash flow is negative and the share price fell 19.3% over the past month.

LS Marine Solution installs and maintains subsea and underground power cables, with about ₩199.5B of its ₩244.2B 2025 sales coming from outside Korea. Trailing twelve-month revenue to H1 2026 was ₩281.0B with a 3.9% operating margin, and the shares closed at ₩26,900, about 48% below the 52-week high of ₩51,600. Profitability remains well below 2023 levels, and the valuation of 125.4x earnings is high relative to the peers listed in the data.

What stands out

• Q3 operating profit rose 235% according to news reports, and coverage says profitability improved even though revenue was lower.
• 2025 revenue grew 87.4% to ₩244.2B, but operating income fell to ₩7.0B from ₩12.4B in 2024 and ₩13.1B in 2023.
• Trailing free cash flow is negative at about -₩43.4B, while the company holds ₩178.5B in cash against ₩35.5B of borrowings.
• Recent filings include a preliminary consolidated earnings report (Oct 21), a major sales or supply contract (Sep 18), and several insider shareholding and 5%+ holding reports.
• Foreign ownership rose slightly to 2.4% from 2.1% 60 days earlier, while institutions were net sellers of about ₩25.2B over the last 20 trading days.

What to watch

• The full Q3 results and whether the operating profit gain holds, given that trailing margins are still low at 3.9%.
• Whether free cash flow turns positive, since it is currently negative at about -₩43.4B on a trailing basis.
• The terms and financial impact of the SK Broadband subsea cable partnership, which the data does not detail beyond the headlines.