The most-talked-about stocks in the Reddit subforum Wallstreetbets were advancing hours before Wednesday's opening bell.

CoreWeave (CRWV) rose by 12.9% in pre-bell activity, reversing a 0.5% decline from the previous session. CoreWeave reported a higher Q3 revenue and raised its 2026 outlook.

Nebius Group (NBIS) was 11.7% higher pre-bell, swinging from a 5.3% fall at Tuesday's close.

Micron Technology (MU) was up 6.5% premarket, after closing Tuesday with a 1.1% fall.

Advanced Micro Devices (AMD) advanced by 6.3% in premarket hours, following a 1.3% increase from Tuesday's session. AMD and Samsung Electronics are teaming up to improve the performance of semiconductor manufacturing test infrastructure, news outlets reported.

Nvidia (NVDA) was 5% higher premarket, swinging from a 5.5% fall at Tuesday's close.

SpaceX (SPCX) rose by 2.7% in pre-bell hours, following a 0.7% increase from Tuesday's session.

Alphabet (GOOG) was up 1.1% premarket, swinging from a 0.4% fall at Tuesday's close.

Microsoft (MSFT) was marginally higher hours before market open, after a 2.2% decline from the previous session.