Sandisk (SNDK) Stock After Hours on Dec. 19, 2025: What’s Driving the Move and What to Watch Before the Next Market Open
Sandisk Corporation (NASDAQ: SNDK) capped a volatile, headline-heavy week with another sharp move on Friday, December 19, 2025—and the stock continued to trade higher after the closing bell. If you’re tracking SNDK going into the next session, the biggest takeaway is that today’s action looks less like a company-specific surprise and more like a “memory-and-AI complex” momentum trade—with investors still digesting bullish signals across semiconductors, storage, and data-center infrastructure. One important calendar note: U.S. markets are closed on Saturday (Dec. 20) and Sunday (Dec. 21), 2025, so the next regular market open is Monday, Dec. 22, 2025. Sandisk stock price