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

Oracle (ORCL) was up 10% in premarket activity, reversing a 1.4% decline from the previous session. Oracle reported higher fiscal Q3 adjusted earnings and revenue that also topped forecasts.

Antero Midstream (AM) advanced by 1.2% pre-bell, swinging from a 0.7% decline at Tuesday's close.

Micron Technology (MU) rose by 0.6% pre-bell, following a 3.5% increase from Tuesday's session.

DTE Energy (DTE) was 0.4% higher premarket, swinging from a 0.8% decline at Tuesday's close.

Nvidia (NVDA) advanced by 0.2% hours before market open, after closing Tuesday with a 1.2% increase.

Microsoft (MSFT) was 0.1% higher pre-bell, swinging from a 0.9% decline at Tuesday's close.

NIO (NIO) fell by 2.5% in premarket hours, after a 15.4% rise from Tuesday's session.

Hims & Hers Health (HIMS) was down 1.2% premarket, after a 5.9% rise from the previous session.