Samsung Electronics Secures Leadership in AI Memory Market

Samsung Electronics has strengthened its position in the AI semiconductor market by signing a supply contract with AMD for next-generation High Bandwidth Memory (HBM4) for AI accelerators. AMD CEO Lisa Su visited Korea for the first time in 10 years since 2014, formalizing a Memorandum of Understanding (MOU) designating Samsung as the preferred supplier of HBM4 for AMD's next-generation Instinct MI455X AI GPU.

This contract is expected to serve as a foundation for Samsung Electronics to expand its market share in the high-performance AI memory market, which has been dominated by SK hynix. HBM4 is a next-generation memory with significantly improved bandwidth and energy efficiency compared to the currently mass-produced HBM3E, and is scheduled to be integrated into AMD's next-generation AI accelerator launching in the second half of 2026.

On the same day, Samsung's Foundry division officially confirmed the mass production schedule for Tesla's AI6 chip. The Tesla AI6 chip, utilizing 2-nanometer process technology, is scheduled to enter mass production in the second half of 2027, approximately six months later than the original target. However, industry observers assess that the schedule delay was inevitable considering the technical difficulty of the 2nm process.

Korean Stock Market Surges on Semiconductor Rally

Following the announcement, Samsung Electronics' stock price surged 7.5% on the Korea Exchange, closing at 208,500 won. SK hynix also rose 8.9%, and the combined market capitalization of the two companies surpassed 40% of the total KOSPI market capitalization for the first time in history. The KOSPI index closed at 5,925, up 5%.

The strength in the semiconductor sector spread across Asian markets. Japan's Nikkei 225 index rose 2.2%, while Tokyo Electron gained 3.9%. China's Shanghai Composite Index rose 0.3%, and the technology-focused ChiNext Index increased 2.0%.

Foreign media analyzed that this rally reflected optimism about the entire AI semiconductor market, beyond just positive news for individual companies. News that next-generation memory technology will be unveiled extensively at NVIDIA's GTC 2026 conference also stimulated investor sentiment.

Samsung vs SK hynix: HBM Market Competition Structure

SK hynix currently leads the high-performance AI memory market with approximately 60% market share. The company has particularly solidified its position by exclusively supplying NVIDIA's H100 and H200 GPUs. Meanwhile, Samsung Electronics has held approximately 20% market share, but this contract with AMD provides a foundation to narrow the gap.

Samsung Electronics' strength lies in simultaneously operating memory and foundry businesses. The company has competitiveness as a comprehensive semiconductor solution provider, able to offer customized chip design (ASIC) and memory as a package, as demonstrated by the Tesla AI6 chip.

Significance of Lisa Su's Korea Visit

AMD CEO Lisa Su's visit to Korea carries symbolic significance beyond a simple contract signing. Since becoming CEO in 2014, Su has grown AMD into a semiconductor powerhouse competing against Intel and NVIDIA, and has recently shown aggressive moves in the AI accelerator market.

Industry observers are paying attention to AMD's designation of Samsung as a 'preferred supplier.' This signifies a long-term partnership beyond a simple purchase contract, suggesting the possibility that Samsung will collaborate closely in AMD's future next-generation product development process.

AMD has currently challenged NVIDIA in the AI accelerator market with its Instinct MI300 series. The MI455X, scheduled for launch in 2026, plans to significantly improve bandwidth and power efficiency by integrating HBM4, positioning it for direct competition with NVIDIA's next-generation Blackwell Ultra GPU.

Technical Challenges of 2nm Process

The Tesla AI6 chip mass production confirmed by Samsung Foundry is expected to be the first large-scale commercialization case of 2nm process technology. The 2nm process is an advanced technology that can increase transistor density by approximately 30% and reduce power consumption by 20% compared to existing 3nm processes.

However, the 2nm process depends on securing precision and yield of Extreme Ultraviolet (EUV) lithography equipment. Samsung announced that it raised the yield of the 2nm process to over 70% in the second half of 2025, but stabilizing the yield to over 90% during mass production remains a challenge.

The Tesla AI6 chip will be used for Tesla's autonomous driving AI computing and is known to have more than double the computational performance compared to the currently mass-produced AI5 chip. Industry observers are watching whether Samsung can secure additional big tech customers such as Apple and Google using its collaboration with Tesla as a foundation.

[AI Analysis] Acceleration of Semiconductor Supply Chain Restructuring Expected

This Samsung-AMD contract demonstrates the trend of AI semiconductor supply chains diversifying away from dependence on a single supplier. AMD has primarily relied on SK hynix for HBM supply, but has dispersed risk by securing Samsung as an additional supplier.

Memory supply stability is likely to emerge as a key competitive factor in the AI accelerator market going forward. Major AI chip companies such as NVIDIA, AMD, and Intel are expected to strengthen their multiple supplier strategies to secure next-generation memory such as HBM4 and HBM4E.

Samsung Electronics has the potential to increase its HBM market share to over 30% by 2026 following this contract. In particular, if it secures competitive advantages in system semiconductor packaging technology combining foundry and memory (e.g., 3D stacking, chiplet architecture), it is expected to strengthen its position as a comprehensive semiconductor solution provider.

Meanwhile, it is noteworthy that global stock markets responded positively to AI semiconductor news despite ongoing Middle Eastern geopolitical tensions. Pepperstone strategist Michael Brown analyzed that "the market is becoming increasingly desensitized to geopolitical news" and "expectations for AI technology advancement are overwhelming short-term risks."