Sandisk (NASDAQ: SNDK) makes NAND memory chips, which are primarily used for long-term data storage in devices like solid-state drives. That may sound like a pretty boring business with not a lot of innovation going on in it -- and you'd be right. That's why Sandisk and its peers are normally pretty boring stocks, but all of that changed in 2026. Demand for storage skyrocketed alongside data center build-outs, consuming all available production capacity. All of a sudden, Sandisk's products were hot commodities, and prices skyrocketed, which translated into incredible stock growth for Sandisk. It's up nearly 500% this year -- second-best in the S&P 500. This also allowed Sandisk to form a new, sustainable business model. I think the transition to this model will help Sandisk tremendously over the long term and eliminate some of the cyclicality typically associated with companies in the memory chip industry.
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