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Sandisk, Western Digital, and Micron Technology were all hot buys last year.
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These stocks all benefited from a surge in demand for their memory and storage solutions.
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10 stocks we like better than Sandisk ›
In the past three years, tech stocks been among the hottest buys due to the growth in artificial intelligence (AI). Last year was no exception, but it wasn’t the data analytics stocks or chip stocks that performed the best. Instead, it was companies involved with selling memory and storage products that did the best.
The three hottest stocks on the S&P 500 last year were Sandisk (NASDAQ: SNDK), Western Digital (NASDAQ: WDC), and Micron Technology (NASDAQ: MU). Here’s how well they did, how their valuations look today, and if they are still good buys for 2026.
Sandisk was a late addition to the S&P 500, joining the index back in November. And it didn’t trade for a full year, either, as it spun off from Western Digital back in February. However, even with a shortened timeframe, it soared an incredible 559% in 2025.
Western Digital acquired Sandisk in 2016 but the two have now gone their separate ways. Sandisk’s focus is on flash drives, memory cards, and solid-state drives (SSDs). Its products are most suitable for high-speed storage and mobility. In its most recent quarterly results, which went up until Oct. 3, 2025, the company’s revenue totaled $2.3 billion, which was up 23% year over year. Sandisk says it has “engagement with five major hyperscale customers,” as it is clearly benefiting from a surge in AI-powered memory and storage needs.
Sandisk’s market cap of $40 billion may look enticing for investors seeking the next big AI play. But despite the recent growth, the company’s net income fell by 47% in its most recent quarter with interest expenses weighing on its bottom line.
Although the stock looks modestly valued, trading at forward price-to-earnings (P/E) multiple of 20 (based on analyst expectations), investors should tread carefully with the stock given its dependence on hyperscalers, AI demand, and its lack of bottom-line growth. I’d hold off on buying the stock given the rosy expectations that are priced into its valuation and its light margins.
Western Digital’s business is also centered around storage, but its primarily around hard disk drives and external storage which can be crucial for backing up data. In its most recent quarter, which coincides with Sandisk’s, Western Digital achieved a higher growth rate of 27%, with its top line rising to $2.8 billion. And unlike Sandisk, its profits soared from $493 million to nearly $1.2 billion.