Samsung SDI Shares Jump 9.52% as Korean Stocks Rebound
Key Facts
Samsung SDI shares closed up 9.52% at 454,500 won on Nov. 10, 2026, after ending the previous session at 415,000 won, according to Investing.com data. The rebound followed an 11.32% decline on Nov. 9, placing the session’s gains in the context of sharp price moves over two consecutive days. South Korea’s KOSPI rose 4% to 5,219.37 points in the same session, according to The Associated Press. Samsung Electronics shares also gained 4.6%, while SK Hynix rose 5.6%. Samsung SDI’s advance coincided with a broader rebound in Korean stocks, with sources identifying no company-specific catalyst for the share move that day.
The gains on Nov. 10 alone did not erase the previous session’s decline, with the stock closing at 454,500 won after losing 11.32% in the prior session. The sequence underscores how quickly the share price can shift, but is not by itself enough to establish a sustained trend. Across the market, the rally included major Korean semiconductor stocks as well as a rise in the benchmark index. The Associated Press said the KOSPI advanced 4% to 5,219.37 points, while Samsung Electronics gained 4.6% and SK Hynix rose 5.6%. Those stocks provide context for the market’s performance that day, while no specific catalyst for Samsung SDI’s own move was documented in the open sources.
On company fundamentals, Samsung SDI said revenue from its battery business rose 55.3% year on year to 4.41 trillion won in the third quarter of 2026. The business posted operating profit of 361.9 billion won, returning to operating profitability, according to the company’s statement. The company attributed the improvement to higher sales of energy storage systems and backup battery units, as the global AI data center market expanded. It also cited increased sales of cylindrical batteries used in power tools and electric vehicles. The company said storage and backup battery sales benefited from data center market growth, linking the performance of those businesses to rising demand for power and infrastructure supporting AI.
On demand, Samsung SDI said it had secured energy storage battery orders exceeding 60 gigawatt-hours during 2026 through the announcement of its third-quarter results. The figure reflects the orders the company reported in its storage business update, as applications for energy systems and backup batteries expand. The company also said it began mass production in October of high-capacity prismatic lithium iron phosphate cells at its StarPlus Energy plant in the United States. The start of production marks a new operational phase for the company’s activity in these cells, according to its statement. The company also said it was seeking to finalize long-term supply agreements that had been under discussion during the year for utility-scale energy storage projects and uninterruptible power supply applications.
For the fourth quarter of 2026, Samsung SDI forecast continued profitability, supported by growth in its energy storage and small battery businesses. The company also expected momentum in the energy storage market to remain strong during the quarter, alongside increased demand for electric vehicles in Europe. By contrast, it said weak U.S. electric vehicle demand was likely to persist temporarily. The company said, "We expect to maintain profitability in the fourth quarter, supported by continued strong growth in our energy storage and small battery businesses." It said it aimed to finalize during the year long-term supply agreements under discussion for utility-scale storage and uninterruptible power supply applications.