Micron Technology (MU) Stock After Hours Today (Dec. 17, 2025): Record Q1 Results, Massive Q2 Guidance, and What to Watch Before Tomorrow’s Open
Micron Technology, Inc. (NASDAQ: MU) is in the spotlight tonight after reporting fiscal first-quarter 2026 results after the closing bell on Wednesday, December 17, 2025—and the stock is reacting immediately in extended trading. MU stock after the bell: the after-hours move and why it matters Micron shares finished the regular session at $225.64 and were trading higher in after-hours activity shortly after the results dropped. Investing.com showed MU around $235.85 in after-hours trading (+4.58%) at roughly 4:04 p.m. ET. Investing.com Canada A separate extended-hours data source (Public.com) reported MU at $238.39 at 4:30 p.m. ET, up about 5.6% from the