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

Alphabet (GOOG) was up 5.8% in premarket activity, reversing a 0.7% decline from the previous session. A US federal judge ruled that Alphabet's Google does not have to divest its Chrome web browser, but will be barred from exclusive contracts related to the distribution of Google Search, Chrome, Google Assistant, and the Gemini app.

Opendoor Technologies (OPEN) advanced by 2.6% pre-bell, after closing Tuesday with a 14.4% riseD.

Tesla (TSLA) was up 1.6% in pre-bell hours, swinging from a 1.4% fall at Tuesday's close.

Palantir Technologies (PLTR) rose by 0.7% premarket, following a 0.2% increase from the previous session.

Nvidia (NVDA) was 0.7% higher premarket, swinging from a 1.9% decline at Tuesday's close.

DTE Energy (DTE) advanced by 0.4% in premarket hours, after closing Tuesday with a 0.7% decline.

United Parcel Service (UPS) rose by 0.3% in pre-bell hours, following a 2.5% fall from Tuesday's session.

UnitedHealth Group (UNH) was slightly advancing pre-bell, swinging from a 0.4% decline at Tuesday's close.