07:05 AM EDT, 06/12/2025 (MT Newswires) -- The most-talked-about stocks in the Reddit subforum Wallstreetbets were mixed hours before Thursday's opening bell.

Oklo ( OKLO ) declined by 5.6% premarket, swinging from a 29.5% rise at Wednesday's close.

Tesla (TSLA) was down 1.8% in pre-bell hours, reversing a 0.1% increase from the previous session.

Nvidia ( NVDA ) declined by 1.1% in premarket activity, following a 0.8% fall at Wednesday's close.

UnitedHealth Group ( UNH ) was 0.6% lower premarket, swinging from a 2.2% increase at Wednesday's close.

Palantir Technologies ( PLTR ) was down 0.6% hours before market open, swinging from a 2.7% increase at Wednesday's close.

Oracle (ORCL) advanced by 7.6% pre-bell, reversing a 0.6% decline from Wednesday's session. Oracle reported higher fiscal Q4 non-GAAP net income and revenue.

Voyager Technologies ( VOYG ) was up 3.4% premarket, following an 82.2% rise from the previous session.

Apple ( AAPL ) was 0.1% higher pre-bell, after closing Wednesday with a 1.9% decline.