Micron Is Up 221% in 2026 and Seagate Is Up 155%: Take Profits, or Hold On for the Ride?

Micron and Seagate are leading the memory-and-storage rally in 2026, but the size of the gains is forcing investors to decide whether to take profits or stay with momentum. Micron (NASDAQ: MU) rose 2% to $918.13, putting its year-to-date gain at 221%. Seagate (NASDAQ: STX) gained 4% to $699.52, up about 154% YTD, while Western Digital (NASDAQ: WDC) is up 119% YTD to $379.29. The article links the surge to AI-driven demand for memory chips and data-center storage, citing Micron Q4 FY2026 revenue of $54.23 billion and Q1 FY2027 guidance of $61.5 billion.