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

Snap (SNAP) was up 7% pre-bell, reversing a 3.3% fall from the previous session.

Tesla (TSLA) was 1% higher premarket, after closing Friday with a 2.2% increase.

Micron Technology (MU) was 0.4% higher hours before market open, after a 3.7% decline from the previous session.

Oklo (OKLO) was down 2.6% in pre-bell hours, swinging from a 28.8% rise at Friday's close.

Novo Nordisk (NVO) was 2.1% lower premarket, after a 0.7% decline at Friday's close.

Opendoor Technologies (OPEN) declined by 1.8% in premarket activity, after a 3.7% fall from the previous session.

UnitedHealth Group (UNH) fell by 1.2% premarket, reversing a 0.6% increase from Friday's session.

Nebius Group (NBIS) was 0.1% lower in pre-bell hours, swinging from a 5.5% increase at Friday's close.