2025’s Best Performing Tech Stocks

Oh, to have been an investor in Sandisk in 2025. That company, probably best known to consumers for those little memory cards or USB drives, was one of the best performing tech stocks of 2025—gaining 559% since February, when it was spun out of Western Digital to be a standalone company. By comparison, the best performing of the big tech names, Alphabet, rose just (!) 65%. For those who can remember back 12 months, Sandisk holds the position that AppLovin did in 2024—a lesser known company that investors went crazy for.

Sparking that enthusiasm is Sandisk’s NAND flash memory business, which has suddenly become very important for data center operators, who need it for (what else?) AI-related workloads. Until now, consumer devices such as phones have been the biggest market for NAND memory but CEO David Goeckeler told an investment conference a couple of weeks ago that Sandisk was “seeing this structural change where the data center market in ‘26 will become the biggest market.” Analysts project Sandisk’s revenue in the fiscal year ending in June 2026 will rise 43%, according to S&P Global Market Intelligence, compared with 10% growth for its last fiscal year.