A new UBS report suggests the high-stakes battle for AI memory dominance is entering a new phase, with Samsung Electronics poised to erase SK Hynix’s lead in the critical HBM market within three years.
Samsung Electronics is on a path to capture approximately 40% of the high-bandwidth memory (HBM) market by 2027, creating a duopoly with current leader SK Hynix Inc., according to a new forecast from UBS. The projection signals a historic reshaping of the market for the memory chips essential for training and running artificial intelligence systems, a segment where SK Hynix has held a commanding lead.
"To 2027, Samsung is expected to be on par with SK Hynix in terms of HBM bit share, with each at ~40%," a new UBS report stated. The bank’s analysts also noted that Micron Technology Inc. would hold the remaining 20%. The forecast comes as UBS sharply revised its expectations for second-quarter server DRAM contract prices, now predicting a 60% quarter-over-quarter jump, far outpacing the previous estimate of 37 percent.
The potential duopoly represents a significant challenge to SK Hynix's current market position. This shift is underpinned by massive AI infrastructure spending from cloud providers, with companies like Microsoft, Google, and Meta expected to spend over $725 billion on capital expenditures in 2026, fueling unprecedented demand for memory.
SK Hynix's High-Margin Dominance Under Pressure
SK Hynix has been the primary beneficiary of the AI boom to date, with its stock price nearly tripling year-to-date and its first-quarter operating margin hitting a record 72%, according to company filings and market data. The company has publicly stated its production capacity for HBM, DRAM, and NAND is completely sold out for the year.
However, this success brings its own pressures. The company's dominance, which includes supplying an estimated 70% of Nvidia's HBM needs, is now being directly challenged by Samsung's aggressive push. Furthermore, SK Hynix faces rising internal costs from a 2023 union agreement that ties employee bonuses directly to profits, paying out 10% of its operating profit—a formula that becomes increasingly expensive as margins soar.
Samsung's Ascent From Laggard to Challenger
Samsung is rapidly closing the gap after initially falling behind in the HBM race. The company has reportedly passed final quality tests for its HBM4 memory with both Nvidia Corp. and Advanced Micro Devices Inc., with full-scale supply expected to begin in June. Should Samsung successfully ramp up mass production in the second half of 2026, SK Hynix’s overall HBM market share could slip from its current 60% to between 50% and 60%, according to market analyses.
This accelerated timeline is the backbone of the UBS forecast. By raising its 2027 HBM shipment forecast for Samsung by 137% year-over-year to 230 million gigabits, UBS projects Samsung will achieve market parity with SK Hynix, whose own shipments are now forecast to grow at a slower 30% in the same period.
Memory Becomes AI's Most Critical Bottleneck
The competition is intensifying as memory solidifies its position as AI's number one bottleneck. Export data from South Korea shows DRAM prices have surged 497% over the past year, a clear indicator of a severe supply-demand imbalance that Goldman Sachs has called the most severe in 15 years.
The strain is so acute that customers are taking preemptive action. Nvidia is reportedly considering a lower HBM configuration for its next-generation "Rubin" Ultra GPU—768GB instead of a possible 1-terabyte—a move seen as an attempt to navigate potential supply shortages and the manufacturing challenges of taller 16-Hi memory stacks.
For investors, the UBS report reframes the landscape. SK Hynix, which has enjoyed a premium valuation for its market leadership, now faces the prospect of that premium eroding as a true competitor emerges. Samsung, in turn, has a clear catalyst for a valuation re-rating if it can execute on its HBM4 production timeline. The soaring price forecasts for server memory suggest the entire sector is poised for a period of exceptional profitability, even as the competitive dynamics between the two main players are set to be redrawn.
This article is for informational purposes only and does not constitute investment advice.
