Samsung Electronics shares jumped as much as 6.51% on June 1 before settling to close at 310,500 won, a gain of roughly 3.67%. The catalyst: reports that the company started shipping samples of its next-generation HBM4E high-bandwidth memory chips to customers around the world.
What HBM4E actually means
Think of high-bandwidth memory as the short-term memory your brain uses when you’re doing complex math. AI accelerators, the chips that power everything from large language models to image generators, need enormous amounts of fast memory to function. HBM is that memory, stacked vertically like a layer cake to maximize speed and minimize space.
HBM4E is the latest evolution. The “E” stands for extended, meaning more capacity and bandwidth per stack compared to the standard HBM4. Samsung shipping samples means the chips are entering qualification testing with customers. Passing those tests is the gateway to mass production orders.
Samsung, SK Hynix, and Micron form a memory oligopoly that controls essentially the entire market for these components.
