Samsung, SK Hynix shares soar on OpenAI Stargate supply deal

Shares of Samsung Electronics and SK Hynix surged, driving South Korea's KOSPI index to a record high, after the chipmakers signed preliminary agreements with OpenAI. These deals involve supplying high-bandwidth memory (HBM) chips for OpenAI's Stargate program data centers and jointly building two data centers in South Korea. This development underscores the critical role of South Korean firms in AI infrastructure and signals progress for OpenAI's ambitious $500 billion Stargate initiative, despite previous reports of delays.

Analysis

Samsung Electronics (KS:005930) and SK Hynix (KS:000660) have secured preliminary agreements to supply high-bandwith memory (HBM) chips for OpenAI's $500 billion Stargate AI infrastructure project, triggering a significant market rally. SK Hynix shares soared 7.6% while Samsung's jumped 3.7%, propelling South Korea’s KOSPI index to a record high of 3,528.84. This development provides tangible evidence of progress for the ambitious Stargate initiative, which had reportedly faced delays, and solidifies the two South Korean firms as critical suppliers in the AI technology stack. The deal extends beyond chip supply, involving the joint construction of two data centers in South Korea with an initial 20-megawatt capacity. Furthermore, various Samsung affiliates, including Samsung SDS, Samsung Heavy Industries, and Samsung C&T, will participate in building and operating data centers, including novel offshore floating facilities. The scale of the partnership is underscored by OpenAI's reported plan to order 900,000 semiconductor wafers by 2029, suggesting a substantial and long-term revenue stream for the chipmakers and validating their pivotal role in the global AI hardware buildout.

Key Decisions for Investors

• The agreements represent a major fundamental catalyst for Samsung Electronics and SK Hynix, reinforcing their dominance in the HBM market and providing enhanced revenue visibility from a key AI leader.
• This development serves as a positive read-through for the entire AI infrastructure ecosystem, as tangible progress on the $500 billion Stargate project may de-risk execution concerns for other involved partners like Microsoft (MSFT) and NVIDIA (NVDA).
• Investors should monitor for the conversion of these preliminary agreements into definitive contracts, as the successful execution of such a large-scale, multi-year project remains critical to realizing the full valuation upside.