Samsung Electronics ships HBM4E samples as shares surge 6% in AI memory chip race

Samsung Electronics Begins Shipping Industry-First HBM4E Samples

Samsung Electronics has begun shipping samples of its latest 12-layer HBM4E AI memory chip to major global customers, marking a significant step in the company's efforts to strengthen its position in the advanced AI memory market 1

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. The announcement sent shares surging as much as 6.51% in Friday trading, reflecting investor optimism about Samsung's competitive positioning in the rapidly expanding high-bandwidth memory chips sector 4

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. Shares last traded 3.67% higher at 310,500 won, significantly outpacing the benchmark KOSPI's 2.3% rise 4

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Performance Leap for Next-Generation AI Systems

The new HBM4E delivers a stable pin speed of 14 gigabits-per-second, with performance scalable up to 16 Gigabits-per-second to support increasingly intensive data processing requirements 2

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. This represents more than a 20% speed increase over Samsung's HBM4, while delivering memory bandwidth of up to 3.6 terabytes-per-second per stack 2

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. The chip's 48-gigabyte capacity marks more than a 30% increase compared with the previous generation, with plans to expand the lineup to include an 8-layer 32GB and a 16-layer 64GB configuration depending on customer requirements 1

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. These high-bandwidth memory chips are critical components in AI accelerators such as Nvidia's Rubin graphics processing units and Google's Ironwood Tensor Processing Unit, helping processors handle large amounts of data quickly 1

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Advanced Manufacturing Drives Energy Efficiency and Thermal Performance

Samsung's 12-layer HBM4E leverages the company's comprehensive semiconductor capabilities, utilizing the industry's most advanced 6th-generation 10-nanometer-class DRAM process (1c) alongside Samsung Foundry's 4nm logic base die 2

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. Advanced low-power design technologies and optimized packaging structures improved energy efficiency by 16% and thermal resistance characteristics by more than 14% compared to the previous generation 2

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. These enhancements enable more effective heat dissipation, allowing prolonged reliability and lower energy consumption in AI data centers with intensive workloads 2

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. "Through our advanced manufacturing capabilities and preemptive infrastructure investments, we will continue to drive the growth of the global AI memory market," said Sang Joon Hwang, executive vice president and head of memory development at Samsung Electronics 1

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Strategic Push to Close Gap with SK Hynix and Micron

The move comes just three months after Samsung began shipping its HBM4 chips to customers in February, showcasing the company's accelerated efforts to narrow the gap with competitors in shipping samples to AI customers including AMD, Nvidia, and Google 4

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. SK Hynix led the global HBM market with a 57% share in the fourth quarter of 2025, followed by Samsung at 22% and Micron at 21%, according to Counterpoint Research 4

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. "In the HBM market, early movers tend to secure the bulk of orders, so gaining market share in the initial stages is critical," said Jeff Kim, head of research at KB Securities-Jefferies 4

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. Kim noted that Samsung had entered the HBM3 and HBM3E markets later than rivals, which limited the volume of orders it was able to secure, but successful completion of the qualification process for HBM4E could shift the vendor structure toward SK Hynix and Samsung, considering Samsung's manufacturing capacity 4

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Broader Implications for Samsung's Foundry Business

Analysts noted that investor gains also reflected optimism over Samsung's AI chip business after Anthropic named Samsung Electronics a strategic infrastructure partner in its latest funding round at a post-money valuation of $965 billion 4

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. Samsung was the only one of three memory partners—alongside Micron and SK Hynix—specifically referenced for its logic chip capabilities, raising expectations that the relationship could eventually lead to additional foundry business following Samsung's $16.5 billion supply deal with Tesla unveiled last year 4

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. With Taiwan's TSMC expected to have its advanced-node capacity fully booked for several years, Samsung could benefit as one of the few companies capable of producing advanced chips 4

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. Samsung plans to begin mass production for HBM4E aligned with customer schedules, following initial sample shipments and optimization, with feedback from global customers on Samsung's HBM4 being highly positive for its performance and energy efficiency 2

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