SK Hynix

SK하이닉스 / 에스케이하이닉스 주식회사

Supplies the high-bandwidth memory, server DRAM, and enterprise storage that determine whether AI accelerators and data-center systems can access data at required speeds.

KRX: 000660
NASDAQ: SKHY (ADR)
Profile as of September 12, 2026
#2 in the AsiaAI Tech Index
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SK hynix is the most consequential independent supplier of HBM to the AI-accelerator supply chain, translating its manufacturing lead directly into record revenue and margins. However, this high profitability is balanced against severe customer concentration, China-based manufacturing exposure, and aggressive competitor capacity additions.

Key figures

Revenue FY2025: 97.1467 trillion Korean won
Revenue growth FY2025: 47%
Operating margin FY2025: 49%
Net income FY2025: 42.9479 trillion Korean won
R&D spend FY2025: 6.73 trillion Korean won
Capital expenditure FY2025: 27.5189 trillion Korean won
Market capitalization Sep 11, 2026: 1,320.7 trillion Korean won (about US$981.43 billion) Estimate
HBM market share Q2 2025: 64%
DRAM market share Q2 2025: 38.7%
Major customer revenue share H1 2025: About 27%
TSV-capacity units Q4 2025: 150,000

Overview

SK hynix traces its modern operating business to Hyundai Electronics, founded in 1983, and was renamed from Hynix Semiconductor in 2012. It operates as a publicly listed Korean company within the SK Group sphere, with SK Square as its largest shareholder. The company manufactures DRAM, NAND flash, CMOS image sensors, and certain foundry products.

Its structural position in the semiconductor industry is defined by its early execution in high-bandwidth memory (HBM). By qualifying high-stack-count HBM3E products and transitioning toward HBM4, SK hynix has established itself as the leading memory supplier for AI accelerators. This makes it a critical infrastructure provider for AI hardware, operating in an oligopoly alongside Samsung Electronics and Micron Technology.

The AI angle

SK hynix benefits directly from AI demand through higher shipments and prices for HBM, high-density server DRAM, and enterprise SSDs. Its HBM products are vertically integrated packages that supply high bandwidth to GPUs and custom AI accelerators. The company states that HBM revenue more than doubled in FY2025, driving record consolidated revenue of 97.1467 trillion Korean won and an operating margin of 49%.

Its AI exposure is highly concentrated. A single unnamed major customer, widely reported to be NVIDIA, accounted for about 27% of consolidated revenue in the first half of 2025. Google and other major AI-system builders are also reported users of its memory products. SK hynix captures value from the AI build-out by providing the critical memory bottleneck components, without needing to design the logic chips themselves.

Technology and moat

The company's central advantage is its advanced HBM integration and manufacturing execution rather than logic-process-node leadership. HBM production requires advanced DRAM process control, through-silicon-via (TSV) integration, die thinning, multi-die stacking, and complex thermal management.

SK hynix utilizes an Advanced MR-MUF packaging approach that supports high-layer HBM assembly. Its HBM4 roadmap leverages a 1b-nanometer-class DRAM process, with expected yields comparable to its established 12-high HBM3E products. These requirements create steep barriers to entry. Even large DRAM competitors like Samsung and Micron face quarters-long qualification cycles and capacity constraints to match SK hynix's qualified output for specific accelerator platforms.

Five-pillar assessment

Scale and market position: The leading supplier of high-bandwidth memory, holding a 64% market share in Q2 2025, and a major global producer of DRAM and NAND flash.
Technology and R&D: Differentiated by Advanced MR-MUF packaging, through-silicon-via integration, and early execution in qualifying high-stack-count HBM3E and HBM4 products.
Supply-chain centrality: The principal HBM supplier to NVIDIA, while depending on a concentrated group of advanced semiconductor equipment manufacturers like ASML and Applied Materials.
Financial momentum: Record FY2025 revenue of 97.1467 trillion Korean won and a 49% operating margin, driven by surging AI-memory demand and pricing.
Governance and quality: Professional management with an independent board chair, though operating within the SK Group structure and exposed to significant geopolitical and customer-concentration risks.

Supply chain and relationships

SK hynix depends on a specialized upstream ecosystem for advanced semiconductor manufacturing equipment. Inferred suppliers include ASML for lithography, Applied Materials and Lam Research for deposition and etch, Tokyo Electron for wafer-fabrication equipment, and KLA for inspection. It also relies on substrates, specialty chemicals, and wafers.

Downstream, its customer base is heavily concentrated in AI accelerator designers and cloud providers. NVIDIA is its most important publicly reported customer, representing an estimated 27% of first-half 2025 revenue. Google is also a reported customer. This concentration means SK hynix's fortunes are tightly coupled to the product cycles and demand forecasts of a few dominant AI hardware companies.

Customers

NVIDIAAbout 27% of first-half 2025 revenue
GoogleAI memory for infrastructure

Suppliers

ASMLInferredLithography equipment
Applied MaterialsInferredDeposition and inspection equipment
Lam ResearchInferredEtch and deposition equipment
Tokyo ElectronInferredWafer-fabrication equipment
KLAInferredProcess-control and inspection equipment

Partners

IntelHistoricalAcquired NAND and SSD business

Competitors

Samsung ElectronicsInferredCompetes in DRAM, HBM, and NAND
Micron TechnologyInferredCompetes in DRAM, HBM, and NAND
KioxiaInferredCompetes in NAND and enterprise storage
Western DigitalInferredCompetes in NAND and enterprise storage

Geopolitics and risk

SK hynix faces substantial geopolitical risk due to its manufacturing footprint in China. It relies on regulatory permissions to import advanced United States-origin manufacturing equipment and tools to these facilities. This exposes the company to US-China technology restrictions and cross-strait disruption risks.

As a major electronics manufacturing center, China also represents significant demand exposure. The company must navigate US export controls that dictate whether it can upgrade or replace equipment at its China fabs, balancing its operational needs against international trade restrictions.

Risk matrix
Risk	Severity	Why it matters
HBM customer concentration	High	A single unnamed customer contributes about 27% of first-half 2025 revenue.
HBM qualification and platform-transition	High	Delays in HBM4 validation or yield can shift volume to competitors.
China equipment-control exposure	High	Relies on regulatory permissions to import US-origin equipment to China.
China demand and regional politics	High	Exposed to US-China technology restrictions and cross-strait disruption.
Memory-cycle volatility	High	DRAM and NAND prices move sharply with supply additions and inventory.
HBM-capacity bottlenecks	High	Output depends on advanced DRAM wafer starts, TSV capacity, and packaging yield.
Large capital-spending commitments	Medium	Large investments increase downside risk if AI-memory demand weakens.
Competition from Samsung and Micron	Medium	Competitor capacity additions create pricing and allocation risk.

Governance and ownership

SK hynix is a publicly listed Korean company, independent of direct state ownership. Its largest shareholder is SK Square, which holds a 20.5% stake and functions as the principal strategic shareholder within the SK Group structure.

The board is chaired by independent director Ko Seung-Beom, separating board leadership from CEO Kwak Noh-Jung. Governance risks are primarily associated with Korean chaebol group relationships, capital-allocation priorities, and minority-shareholder protections, rather than state control. It reports financials under K-IFRS.

What to watch

Whether SK hynix maintains HBM market share above 50% against Samsung and Micron.
Whether HBM4 production ramps according to customer schedules and reaches stable yields.
Whether the unnamed major customer's revenue concentration changes from the 27% disclosed for H1 2025.
Whether US export-control policy continues to permit equipment upgrades at China facilities.
Whether FY2026 capital expenditure rises materially above FY2025's 27.5189 trillion Korean won.
Whether enterprise SSD and high-capacity server DRAM demand broadens into inference infrastructure.

Recent developments

March 25, 2026Management stated at the annual general meeting that HBM revenue more than doubled in FY2025.
January 28, 2026Reported FY2025 revenue of 97.1467 trillion Korean won and operating profit of 47.2063 trillion Korean won.
October 29, 2025Reported Q3 2025 revenue of 24.4489 trillion Korean won and scheduled HBM4 shipments for Q4 2025.
July 23, 2025Reported Q2 2025 revenue of 22.232 trillion Korean won, citing strong AI-memory demand.
April 24, 2025Reported Q1 2025 revenue of 17.6391 trillion Korean won.
March 25, 2025Annual general meeting confirmed FY2024 performance and stated that HBM revenue growth is central to its strategy.

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Guides that cover SK Hynix

About this profile

Compiled with AI-assisted research from company filings, market data, and published reporting as of September 12, 2026, then reviewed by AsiaAI.FYI. Figures marked Estimate are not company-reported. Check primary filings before relying on any number.

Confidence: B. Core FY2025 financial figures, board roles, and largest-shareholder information are supported by company disclosures, while customer-level attribution and HBM product-level revenue rely on market reporting.

Main sources: Company financial-results releases; Company investor-relations financial statements; Company governance and ownership disclosures; Korea Financial Supervisory Service audit-report data; Market-data services; Industry market research.

All 83 sources

Position in the AI stack

A producer of memory and storage components, specifically the high-bandwidth memory integrated with leading AI accelerators.

Legal name: SK hynix Inc.
Formerly: Hyundai Electronic Industries Co., Ltd., Hyundai Electronics Industries Co., Ltd., Hynix Semiconductor Inc.
Headquarters: Icheon-si, Republic of Korea
Founded: 1983
Leadership: Kwak Noh-Jung / 곽노정, CEO and President
Ko Seung-Beom / 고승범, Independent Chairman of the Board
Employees: 36,042 (2026)
Ownership: Publicly listed; part of SK Group
Listings: KRX: 000660
NASDAQ: SKHY (ADR)
Business: Advanced memory, high-bandwidth memory, and enterprise storage
Sector: Foundry & Chip Manufacturing
Memory
Website: skhynix.com