Samsung SDI (006400)
Samsung SDI (006400) is a KOSPI-listed Korean battery maker producing EV, ESS, and IT cells, and a front-runner in all-solid-state batteries with a 2027 mass-production target at 900 Wh/L. In ETFpedia it anchors both the solid-state battery and Korea manufacturing themes, though it posted a heavy operating loss in 2025 amid the EV downturn.
| Ticker | 006400 |
|---|---|
| Exchange | KOSPI |
| Sector | Batteries · EV & ESS Cells |
| Country | South Korea |
| Wikidata | Q21120876 |
| Last updated | 2026-06-04 |
Next event:Next report · H1 2026 반기보고서, estimated · Estimated from Korea's 45-day semi-annual filing deadline; not company-confirmed. Last report: Q1 2026 분기보고서 filed 2026-05-15. (source)
Latest reported quarter:Q1 2026 (ended Mar 31, 2026) (reported2026-05-15)
Samsung SDI's Q1 2026 revenue rose 13% year over year to ₩3.58 trillion as ESS demand picked up, and the operating loss narrowed sharply to ₩-1,556억 (KRW -155.6 billion) from ₩-4,341억 a year earlier; net income turned positive at ₩561억 (KRW 56.1 billion).
| Revenue | ₩3.58T+13%YoY |
|---|---|
| Operating profit | ₩-1,556억 (KRW -155.6B)+64%YoY · Operating loss, narrowed from ₩-4,341억 |
| Net income | ₩561억 (KRW 56.1B)+126%YoY · Returned to profit |
Recent & upcoming events
- · FY2025 사업보고서 filed.Full-year 2025 revenue ₩13.27T (-20% YoY) with an operating loss of ₩-1.72T (vs ₩3,633억 profit in 2024) and a net loss of ₩-5,849억, reflecting the EV-battery downturn. (source)
- · Q1 2026 분기보고서 filed.Revenue grew 13% YoY to ₩3.58T and the operating loss narrowed to ₩-1,556억 as ESS demand, partly AI-data-center driven, improved the mix. (source)
Figures are consolidated (연결) per Samsung SDI's DART filings. The 2025 operating loss is reported plainly; ESS is the near-term growth driver while the all-solid-state battery is a 2027 milestone, not current revenue.
Figures are as of 2026-05-15 and reflect the most recent public filings/IR releases; they are updated after each earnings report.
What does Samsung SDI do?
Samsung SDI makes rechargeable lithium-ion batteries through its Energy Solutions segment, covering electric-vehicle cells, energy storage systems (ESS), and small IT batteries, plus an Electronic Materials business serving semiconductors and displays. EV cells have been the historical core, but with EV demand soft, ESS has become the near-term growth engine, helped by surging power needs from AI data centers (The Korea Herald). The company is also one of the most-watched names in next-generation chemistry, running an all-solid-state battery (ASB) pilot line and shipping proto samples to automakers.
Why is Samsung SDI a solid-state battery company?
Samsung SDI sits near the front of the all-solid-state race, which is the core of the solid-state battery theme. It built an ASB pilot line at its Suwon R&D center and has laid out a roadmap to mass-produce cells in 2027 using a solid electrolyte and an anode-less design.
“The company plans to mass-produce these 900 Wh/L solid-state batteries using its solid electrolyte and anode-less technologies, and the design’s energy density is 40% higher than Samsung SDI’s prismatic battery currently in production.”
Solid-state remains a 2027 milestone rather than current revenue, so it is best read as an option on the company’s future, not a line in today’s results.
What did Samsung SDI report most recently?
The honest headline for 2025 is a loss. For full-year 2025 Samsung SDI reported revenue of ₩13.27 trillion, down 20% year over year, an operating loss of ₩-1.72 trillion (versus a ₩3,633억 operating profit in 2024), and a net loss of ₩-5,849억 (DART 사업보고서). That swing reflects the EV-battery downturn. The Q1 2026 print was better: revenue rose 13% year over year to ₩3.58 trillion, the operating loss narrowed to ₩-1,556억 from ₩-4,341억 a year earlier, and net income turned positive at ₩561억 (DART 분기보고서). ESS, including 46-series cylindrical cells and AI-data-center storage demand, drove the improvement.
What are the risks for Samsung SDI?
- EV-demand cyclicality. The 2025 operating loss of ₩-1.72 trillion shows how hard a soft EV market hits a cell maker; recovery timing is uncertain.
- Solid-state execution. The 2027 mass-production target at 900 Wh/L is ambitious and unproven at scale; delays or yield problems would push out the payoff.
- ESS concentration. Near-term growth leans heavily on ESS, especially in the US, exposing the company to policy and AI-data-center capex swings.
- Competition and pricing. Chinese cell makers compete aggressively on cost, pressuring margins across the industry.
Related securities, concepts & terms
- Solid-State Batteries & Energy Storageparent
- Korea Manufacturing Core Allianceparent
- LG Energy Solution (373220)sibling
Related indices & ETFs
- Akros Solid-State Battery Index · AkrosSolid-state-battery thematic index that includes this company.
Frequently asked questions about Samsung SDI
What does Samsung SDI do?
Samsung SDI makes lithium-ion batteries for electric vehicles, energy storage systems (ESS), and IT devices, and also produces electronic materials. It runs an all-solid-state battery pilot line and targets 2027 mass production at 900 Wh/L (Samsung SDI). In FY2025 it reported revenue of ₩13.27 trillion (DART 사업보고서).
Why is Samsung SDI part of the solid-state battery theme?
It is one of the front-runners in all-solid-state batteries (ASB). Samsung SDI set up a pilot line at its R&D center in Suwon, ships proto samples to global automakers, and has published a roadmap to mass-produce 900 Wh/L cells in 2027 using solid-electrolyte and anode-less technology, roughly 40% denser than its current prismatic cells (Samsung SDI).
Did Samsung SDI lose money in 2025?
Yes. In FY2025 Samsung SDI posted revenue of ₩13.27 trillion, down 20% year over year, and an operating loss of ₩-1.72 trillion (versus a ₩3,633억 profit in 2024), with a net loss of ₩-5,849억, driven by the EV-battery downturn (DART 사업보고서). The loss narrowed in Q1 2026 to ₩-1,556억 as ESS demand improved the mix (DART 분기보고서).
When does Samsung SDI next report earnings?
Korean issuers do not pre-announce earnings dates. Based on Korea's 45-day semi-annual filing deadline, the H1 2026 반기보고서 is expected around August 14, 2026; that date is estimated, not company-confirmed. Samsung SDI last filed its Q1 2026 분기보고서 on May 15, 2026 (DART).
Sources & references
- 삼성SDI 분기보고서 (2026.03) · Samsung SDI / DART (Financial Supervisory Service), 2026-05-15
- 삼성SDI 사업보고서 (2025.12) · Samsung SDI / DART (Financial Supervisory Service), 2026-03-10
- [SDI Focus] 900Wh/L All Solid Battery Becomes Reality · Samsung SDI, 2024-03-06
- Samsung SDI narrows loss on AI-driven ESS demand · The Korea Herald, 2026-01-29
- SAMSUNG SDI Announces 2025 Fourth Quarter and Full Year Results · Samsung SDI, 2026-01-29