Samsung SDI: Share Price Up Sharply While Filed Results Still Show Operating Losses

Thesis

The data supports a story of a share price that has moved well ahead of reported earnings. The stock gained 27.5% in three months and 171.0% in one year, and sits below its 52-week high of ₩723,000 and far above its low of ₩201,500. Filed numbers through H1 2026 show revenue of ₩14.3T, an operating margin of -5.9% and net income of only ₩37.6B. A news headline from Herald Business says a surprise Q3 profit is expected, but that is a media expectation and not in the filings provided. Another headline reports a drop of over 6% early on 2026-10-13, near ₩520,000, which shows how volatile the shares are. Investor flow, foreign ownership and short-balance data are not available, so we cannot say who has been driving the move.

Business overview

Samsung SDI is a KOSPI-listed battery company, founded on 1970-01-20 and listed on 1979-02-27, with 80,585,530 listed shares. The CEO is listed as 최주선. At the 2026-10-12 close its market cap was about ₩45.2T and enterprise value about ₩48.1T. Revenue rose from ₩13.6T in 2021 to a peak of ₩22.7T in 2023, then fell to ₩16.6T in 2024 and ₩13.3T in 2025. Among the peers listed, LG Energy Solution has a market cap of ₩93.1T, POSCO Future M ₩15.7T, Ecopro BM ₩11.3T, L&F ₩3.9T and Ecopro Materials ₩2.4T.

Model estimate of fair value

The valuation model has no estimate for this company yet (not enough data, or no positive value with the base case).

Report history

1. Oct 29, 2026Update noteEarningsSamsung SDI Reports Q3 Operating Profit of ₩407.8B, Ending Run of Losses
2. Oct 13, 2026InitiationSamsung SDI: Share Price Up Sharply While Filed Results Still Show Operating Losses