Monday's pre-market session: top gainers and losers in the S&P500 index

Last update: Aug 4, 2025

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

Pre-market gainers

Ticker	Change	Comment
IDXX	13.9%	IDEXX LABORATORIES INC's (NASDAQ:IDXX) shares surged 13.9% to reach $610.0 during the pre-market session on Monday. The company's earnings where released Yesterday. A press release (IDEXX Laboratories Announces Second Quarter Results) was released earlier today.
PPG	5.0%	The pre-market session on Monday saw a significant rise in PPG INDUSTRIES INC's (NYSE:PPG) shares, climbing 5.0% to $109.66.
APH	4.09%	Pre-market trading on Monday showed positive momentum for AMPHENOL CORP-CL A (NYSE:APH), as the stock price advanced 4.09% to reach $108.58. Earlier today the company had a press release: Amphenol Corporation to Acquire Connectivity and Cable Solutions Business From CommScope.
TSN	4.02%	Exciting news for TYSON FOODS INC-CL A (NYSE:TSN) as their shares soared 4.02% to $54.64 during the pre-market session on Monday. yesterday the company released their earnings.
ETN	3.31%	EATON CORP PLC's (NYSE:ETN) shares surged 3.31% to reach $393.91 during the pre-market session on Monday. EATON CORP PLC is releasing earnings today. In the last 3 months the stock gained 27.22%.
SMCI	2.58%	During Monday's pre-market trading, SUPER MICRO COMPUTER INC (NASDAQ:SMCI) demonstrated strong momentum, with the stock price rising 2.58% to $58.1. Today SMCI is releasing earnings. In the last 3 months the stock gained 68.02%.
AMD	2.4%	ADVANCED MICRO DEVICES (NASDAQ:AMD) rose 2.4% to $175.82 during Monday's pre-market session. The company is releasing earnings today. Shareholders saw the stock price going 24.5% higher in the past month.
WAT	2.3%	WATERS CORP's (NYSE:WAT) shares rose 2.3% to $297.0 during Monday's pre-market session. WATERS CORP released earnings Yesterday. Shareholders saw the stock price going 30.13% lower is the past 6 months.
TSLA	2.27%	TESLA INC (NASDAQ:TSLA) recorded a 2.27% increase in share price during the pre-market session, reaching $309.49 on Monday. In the last 6 months the stock lost 25.2%.
ALGN	2.18%	ALIGN TECHNOLOGY INC's (NASDAQ:ALGN) stock price increased by 2.18% to $139.5. The stock is trading 30.64% lower than a month ago.

To see the full list of premarket gainers you can use our premarket gainers page.