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

Cleveland-Cliffs (CLF) rose by 31.9% premarket, reversing a 1.2% decline from the previous session.

UnitedHealth Group (UNH) advanced by 1.7% pre-bell, following a 1.3% increase at Friday's close.

Antero Midstream (AM) was up 0.8% in premarket hours, swinging from a 0.4% fall at Friday's close.

enCore Energy (EU) was down nearly 3% pre-bell, extending a 1.5% decline from the previous session.

Tesla (TSLA) declined by almost 2% hours before the market open, adding to a 3.3% Friday.

Palantir Technologies (PLTR) was 1.7% lower in premarket activity, swinging from a 7.7% increase in the previous session.

Reddit (RDDT) fell by 1.6% in pre-bell hours, after closing Friday with a 3.1% increase.

Nvidia (NVDA) was down 1% premarket, following a 2.9% decline from the previous session.