Don’t just look at SK Hynix—global memory concept stocks in one go: Korean pricing, Taiwan benefiting from the supply chain, and Japan’s hidden champions

In 2026, the memory supercycle drove the whole world crazy. From South Korea and Taiwan’s supply chains to US, Japan, and China, and even European equipment makers, this round of price hikes has woven a cross-border industrial-chain map. This article quickly walks you through it.
（Background: Directly covering SK hynix’s 《The World I Saw for the First Time》— KBS decodes the secret HBM memory production line, with employees beaming with bright smiles）
（Additional context: Wall Street is going wild shouting, “Micron is the next Nvidia”! The AI memory shortage pushed Micron’s market cap to briefly surpass Meta and Tesla）

Table of Contents

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• South Korea: the main battlefield for HBM original manufacturers
• Taiwan: a stronghold for the HBM supply chain and niche memory
• United States: the engine of AI demand and the only original manufacturer
• Japan: the invisible champion in materials, equipment, and test machines
• China: a national-team-led catch-up race under independent control
• Europe: no original manufacturer, yet it gets stuck at the equipment throat
• How to read this map

The memory industry has long been famous for the most volatile business cycle in history—prices can rise threefold in a single year, then be slashed in half the next year. But this time, the driver of the price hikes is not the inventory cycle of traditional PCs and phones. Instead, it’s the never-ending appetite for AI training and inference from Nvidia and cloud giants.

Memory is being redefined from a typical cyclical stock into an AI growth stock.

The issue currently lies in the supply structure. High-bandwidth memory used for AI (HBM) isn’t something you can just make a bit more of like standard DRAM. With the same wafer capacity, producing HBM requires three to four times the production capacity of traditional DRAM, because HBM relies on stacking multiple layers of chiplets and requires more yield losses and more testing time.

Original manufacturers shift utilization rates toward HBM. Standard DRAM and NAND supplies are directly crowded out. As a result, shortages and price hikes spread from high-end AI servers all the way to smartphones, PCs, and even end-consumer products like memory cards and USB flash drives—lifting old-process chips that previously had no spotlight along with it.

To understand this map, the simplest way is to break it down by layers of the industrial chain: at the top are foundries like Samsung, SK hynix, and Micron that determine capacity allocation and pricing power; the middle layer is Taiwan-led OSAT and module makers, which assemble the original chips into sellable products and also capture purchase-order flow and full-load dividends; the outermost layer is equipment and materials companies—selling shovels to everyone mining for gold. This layer is most concentrated in Japan and Europe.

Only when these three layers stack together do you get a complete picture of the memory-concept stock map. The sections below break it down country by country.

South Korea: the main battlefield of HBM original manufacturers

The two major South Korean groups nearly monopolize global memory original-manufacturer capacity—and they are also the price-setters for this supercycle price rally. As long as Samsung or SK hynix adjusts pricing strategy or capacity allocation, spot prices worldwide usually move in sync within the same week, making them the most influential end in the entire supply chain.

• Samsung Electronics (005930): the global shipment leader for DRAM and NAND, but in HBM it is currently second, and it is fully focused on catching up with SK hynix in technology and customer certification progress.
• SK hynix (000660): HBM market leader. In 2025, HBM revenue accounted for about 63% of the company’s total, making it Nvidia’s most important HBM supplier. HBM4’s main ramp is scheduled for scale-up in the third quarter of 2026.
• Hanmi Semiconductor (042700): focuses on the thermal compression bonding (TC bonder) equipment that is indispensable in HBM packaging processes, making it the most directly benefiting equipment maker when South Korean original manufacturers expand capacity.

Taiwan: a stronghold for the HBM supply chain and niche memory

Taiwan has no original manufacturer that leads HBM specifications, but it is nearly present in every middle-to-lower supply-chain step: the only DRAM original manufacturer, the world’s largest capacity for advanced packaging, and large volumes of niche memory and module makers. In this price-hike cycle, Taiwan is one of the regions that most directly benefits from absorbing purchase orders and enjoying the full-load effect.

Original manufacturers and niche memory:

• Nanya Tech (2408): Taiwan’s only DRAM original manufacturer. In the first quarter of 2026, revenue rose nearly 6x year over year, with a net profit margin over 50%. It mainly captures the order transfers after Micron, Samsung, and SK hynix gradually exit the DDR4 market.
• Winbond (2344): Morgan Stanley listed it as the top pick among memory peers. DDR4, LPDDR4, NOR Flash, and SLC NAND all benefit from the price upcycle.
• Macronix (2337): NOR Flash leader. Turned from loss to profit in the first quarter of 2026, ending 10 consecutive quarters of losses.
• G-Link Microsystems (5351): specializes in niche DRAM, targeting non-standard applications such as automotive and industrial control.
• Phison (8299): a NAND controller chip maker—an essential component supplier behind module makers and SSD makers.
• Powerchip Semiconductor (6770): a foundry/OSAT company that also operates its own memory-brand business.

Advanced packaging and testing:

• TSMC (2330): a holder of CoWoS advanced packaging capacity that HBM stacking must pair with, serving as a key hub in Nvidia AI server supply chains.
• ASE Technology Holding (3711): the global leader in packaging and testing. When memory and logic chip packaging and testing capacity gets tight, it is the first to be hit but also first to benefit.
• King Yuan Electronics (6239): focuses on memory packaging and testing, with contract manufacturing cooperation with both US and South Korean original manufacturers.
• Guan Yuan Electronics (2449): a major memory testing company, with utilization rates rising along with the price-hike cycle.

Modules and test interfaces:

• Adata (3260): a memory module brand maker that directly reflects positive spot price movements.
• Team Group (4967): a consumer memory module maker that also benefits from spot market trends.
• Microtest (6510): makers of wafer testing interface cards; when memory testing demand increases, they benefit in parallel.
• Phicomm (6515): makers of testing interface boards, with customers spanning both the memory and logic-chip sides.

United States: the engine of AI demand and the only original manufacturer

The roles from the US side are different. Nvidia is the demand-side engine, while Micron is the only remaining on-the-line memory original manufacturer; most others are equipment and peripheral storage companies.

• Micron (MU): the only remaining US DRAM and NAND original manufacturer. HBM3E has entered mass production and shipments, and HBM4 has also been onboarded into Nvidia’s supply chain. Micron’s HBM capacity has already been sold out through 2027.
• Nvidia (NVDA): the largest HBM demand player globally. Procurement decisions for AI accelerators directly determine capacity allocation across the entire memory supply chain.
• Applied Materials (AMAT), Lam Research (LRCX): two major leaders in memory process equipment. Original manufacturers placing expansion orders and process upgrades will place orders with them.
• Western Digital (WDC): a storage-product maker that benefits in tandem with the NAND and HDD demand price-upcycle.

Japan: invisible champions in materials, equipment, and test machines

Japan has no DRAM original manufacturers, but it holds several key links across the NAND and overall memory equipment chains—especially hard-to-replace niche equipment such as test machines in the back end and wafer dicing and grinding.

• Kioxia (Kioxia, 285A): Japan’s only remaining NAND original manufacturer. Its predecessor was Toshiba’s memory business unit, and it ranks among the top tiers globally by NAND shipment share.
• Advantest (6857): a leader in memory and HBM testing equipment. When AI memory testing demand increases, longer order visibility directly benefits it.
• Disco (6146): a wafer dicing and grinding equipment maker. HBM’s multi-layer stacking process requires higher dicing precision, making it an indirect beneficiary.
• Tokyo Electron (TEL, 8035): Japan’s largest semiconductor process equipment maker. Memory and logic-chip capacity expansions both need its equipment.

China: a national-team-led independent controllable catch-up race

China’s memory industry is led by national teams. Most of the main companies are not listed on public markets. Investors can usually access mainly equipment, materials, or a small number of niche makers that are already listed—but the expansion pace cannot be underestimated.

• Yangtze Memory Technologies (YMTC): the representative Chinese NAND original manufacturer. In September 2025 it established a DRAM subsidiary and, together with CXMT, entered the HBM field. It is not yet listed.
• ChangXin Memory Technologies (CXMT): the representative Chinese DRAM original manufacturer. It is preparing for a Shanghai IPO, planning to raise about 29.5 billion yuan RMB. In the first quarter of 2026, revenue grew over 700% year over year to 50.8 billion yuan RMB. The HBM back-end packaging plant in Shanghai is expected to start production by the end of 2026.
• GigaDevice (603986): a representative Chinese NOR Flash and niche memory maker, and also one of the few memory-concept stocks that can be traded directly on the A-share market.

Europe: no original manufacturer, yet it gets stuck at the equipment throat

Europe has no DRAM or NAND original manufacturers, but it holds key equipment that cannot be bypassed in memory manufacturing—especially in the advanced packaging and lithography domains where alternatives are almost nonexistent.

• ASML: the exclusive supplier of EUV extreme ultraviolet lithography equipment. Advanced-process memory and logic chips cannot get around it.
• BESI: a hybrid bonding equipment maker, a key equipment supplier for more advanced stacking technologies like HBM4.
• ASM International: an atomic layer deposition (ALD) equipment supplier, providing necessary steps for memory miniaturization processes.

How to read this map

If you lay out the entire industrial chain, the core logic of the 2026 memory supercycle is clear: AI demand consumes high-end capacity, crowds out standard memory supply, drives broad-based price increases, and positions South Korea and Taiwan at the two core ends—original manufacturers and the supply chain.

The US, Japan, and Europe each get stuck at several hard-to-bypass nodes: demand engines, testing equipment, and advanced lithography. China, meanwhile, is a category of its own with the national-team mode, accelerating the catch-up. But the price-hike cycle is ultimately still a cycle: original manufacturers’ massive capacity expansions, legal lawsuits, and foreign capital selling pressure all serve as reminders that this map is not a fixed landmark.

This article organizes industry and individual-stock information and is not investment advice. Investors must evaluate risks on their own.