Sandisk Stock Is Up 535% in 2026. That Didn’t Stop Billionaire David Tepper from Buying 281,250 Shares.

Few stocks have captured Wall Street’s attention quite like Sandisk Corporation (SNDK). Over the last year, the memory and storage company has delivered an astonishing gain of more than 3,000%, riding the massive wave of spending tied to artificial intelligence (AI) infrastructure. While the company is widely associated with everyday storage products like USB flash drives, memory cards, and portable SSDs, its growth is now driven by modern data centers.

Sandisk has increasingly positioned itself as a key supplier of high-performance memory and storage solutions used inside modern data centers, where the rapid expansion of generative AI applications is driving unprecedented demand for faster and more efficient infrastructure. Additionally, Sandisk has benefited heavily from its specialization in NAND flash technology, which stores information electronically rather than through mechanical spinning disks used in traditional hard drives.