Micron and Sandisk Hit Record Memory Margins. There's One Clear Winner.

Investing in memory chip stocks has been a rewarding experience in 2026. Two standout performers are Sandisk (SNDK) and Micron Technology (MU), each delivering impressive returns over the past year. The driving force behind this success is the record demand for memory chips, with supply running short, leading to soaring prices. This has significantly boosted the profitability of both Sandisk and Micron, resulting in record margins for each.

Although both stocks are performing well, Micron appears to be the clear winner with more upside potential in the future. While both companies specialize in memory chips, they focus on different aspects. Sandisk and Micron both produce NAND memory for long-term data storage, often found in devices such as solid-state drives. However, Micron also manufactures DRAM memory, which is used for quick information access in computing devices.

Among Micron's business segments, one stands out: the subsegment of DRAM memory known as high bandwidth memory (HBM). HBM is utilized in computing units like graphics processing units (GPUs), and Micron predicts HBM shipments will expand at a faster rate than conventional DRAM. For 2027 and 2028, Micron projects low to mid-20% growth in both NAND and DRAM shipments.

This slower growth in traditional memory industries provides Micron an advantage over Sandisk. In a significant development, Micron has entered into an industry-first partnership with Nvidia, creating a custom HBM chip for the company. This move could lead to a more contractual relationship, stabilizing Micron's revenue. Both Micron and Sandisk are addressing the issue of unstable revenue by securing long-term supply agreements with their clients.

By doing so, they are converting the upside of higher memory chip prices into guaranteed revenue, effectively raising the floor of business performance. Due to prolonged underperformance in the industry caused by low demand, this strategic move is proving to be highly beneficial. An estimated 35% of Micron's revenue through 2030 is secured through these contracts, compared to Sandisk's 50% of contracts signed with clients.

As the market anticipates a cyclical downturn for both companies, their stocks do not trade at high premiums. However, with both firms taking steps to mitigate their cyclical risks, they could trade at a near-average premium for big tech stocks. If Micron's stocks rally to around 20 times earnings by the end of their respective fiscal years, it could lead to a significant increase in their value, potentially tripling or quadrupling in price.

While Sandisk remains a solid choice, Micron offers greater return potential due to its exposure to the high-growth HBM segment and its currently cheaper valuation.