These S&P500 stocks that are showing activity before the opening bell on Thursday.

Last update: May 15, 2025

As we await the opening of the US market on Thursday, let's delve into the pre-market session and discover the S&P500 top gainers and losers shaping the early market sentiment.

Pre-market losers

Ticker	Change	Comment
UNH	-6.73%	UNITEDHEALTH GROUP INC's (NYSE:UNH) stock price decreased by 6.73% to $287.29. Yesterday the company had a press release: UNH INVESTOR ALERT: Bronstein, Gewirtz & Grossman LLC Announces That UnitedHealth Group Incorporated Investors With Substantial Losses Have Opportunity to Lead Class Action Lawsuit.
VLO	-2.7%	VALERO ENERGY CORP's (NYSE:VLO) shares experienced a 2.7% decline, falling to $130.7 during Thursday's pre-market session. In the last month the stock gained 24.89%.
DVN	-2.68%	DEVON ENERGY CORP's (NYSE:DVN) stock price decreased by 2.68% to $33.05. Shareholders saw the stock price going 31.56% lower is the past year.
FANG	-2.67%	DIAMONDBACK ENERGY INC's (NASDAQ:FANG) stock price is declining with 2.67% to a price of $140.95. In the last year the stock lost 26.74%.
SMCI	-2.56%	During Thursday's pre-market session, the shares of SUPER MICRO COMPUTER INC (NASDAQ:SMCI) declined by 2.56%, reaching $43.85. Despite yesterday's 15.71% gain, SMCI experiences a 2.56% decline in today's pre-market session, indicating a shift in market sentiment.
CF	-2.41%	The pre-market session on Thursday witnessed a 2.41% decrease in CF INDUSTRIES HOLDINGS INC's (NYSE:CF) shares, with the stock price falling to $83.9.
PWR	-2.38%	QUANTA SERVICES INC's (NYSE:PWR) stock price recorded a 2.38% decrease, falling to $335.0. In the last month the share price increased with 25.68%.
APO	-2.35%	The pre-market session on Thursday witnessed a 2.35% decrease in APOLLO GLOBAL MANAGEMENT INC's (NYSE:APO) shares, with the stock price falling to $140.84. The stock is trading 27.56% higher than a year ago.
SLB	-2.25%	Investors observed a 2.25% decline in SCHLUMBERGER LTD's (NYSE:SLB) stock price, which now stands at $35.2 during Thursday's pre-market session. In the last year the stock lost 25.89%.
APA	-2.2%	APA CORP's (NASDAQ:APA) shares fell 2.2% to $17.77. In the last month the share price increased with 22.03%.

Our premarket losers page will show you the full list.