Wondering what's happening in today's S&P500 pre-market session?

Last update: Aug 18, 2025

Let's have a look at what is happening on the US markets before the opening bell on Monday. Below you can find the top S&P500 gainers and losers in today's pre-market session.

Gainers

Ticker	Change	Comment
DAY	24.62%	DAYFORCE INC's (NYSE:DAY) shares rose 24.62% to $65.9 during Monday's pre-market session. In the last 6 months the stock lost 20.39%.
FSLR	5.43%	FIRST SOLAR INC's (NASDAQ:FSLR) shares rose 5.43% to $210.8 during Monday's pre-market session. Following yesterday's 11.05% increase, FSLR demonstrates further positive momentum in today's pre-market session with a 5.43% gain.
ENPH	3.33%	Exciting news for ENPHASE ENERGY INC (NASDAQ:ENPH) as their shares soared 3.33% to $36.0 during the pre-market session on Monday. Shareholders saw the stock price going 30.87% lower in the past 3 months.
UNH	2.76%	UNITEDHEALTH GROUP INC (NYSE:UNH) recorded a 2.76% increase in share price during the pre-market session, reaching $312.41 on Monday. Following yesterday's 11.98% increase, UNH demonstrates further positive momentum in today's pre-market session with a 2.76% gain.
EPAM	2.66%	Investors witnessed a remarkable surge in EPAM SYSTEMS INC (NYSE:EPAM) during Monday's pre-market session, with the stock price rising 2.66% to $161.9. Shareholders saw the stock price going 40.74% lower is the past 6 months.
CVS	2.07%	CVS HEALTH CORP (NYSE:CVS) experienced an impressive 2.07% increase in share price, reaching $70.02 during the pre-market session on Monday.
BIIB	2.04%	BIOGEN INC (NASDAQ:BIIB) recorded a 2.04% increase in share price during the pre-market session, reaching $141.42 on Monday. The stock is trading 31.36% lower than a year ago.

For the full premarket gainers list go to our premarket gainers page.