Sandisk Corp. (NASDAQ:SNDK) tops our list of spin-off companies in 2025 and is also the largest by market cap. The company was a wholly owned subsidiary of Western Digital Corporation (NASDAQ:WDC) and became an independent company following its spin-off, which was completed on February 21, 2025. WDC distributed 80.1% of its stake to its shareholders, who received one-third (1/3) of one share of Sandisk’s common stock for each share of WDC’s common stock held (per the company’s report). While Western Digi ...