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Which S&P500 stocks are moving before the opening bell on Wednesday?

The US market is yet to commence its session on Wednesday, but let's get a preview of the pre-market session and explore the top S&P500 gainers and losers driving the early market movements.


premarket

S&P500 Gainers

TickerChangeComment
SMCI8.8%During Wednesday's pre-market trading, SUPER MICRO COMPUTER INC (NASDAQ:SMCI) demonstrated strong momentum, with the stock price rising 8.8% to $34.38. Yesterday the company had a press release: Supermicro Announces Fourth Quarter and Full Fiscal Year 2026 Financial Results.
LITE7.49%LUMENTUM HOLDINGS INC's (NASDAQ:LITE) stock price is advancing with 7.49% to a price of $882.09. Yesterday the company had a press release: Lumentum Announces Fourth Quarter and Full Fiscal Year 2026 Results.
COHR5.7%COHERENT CORP (NYSE:COHR) recorded a 5.7% increase in share price during the pre-market session, reaching $347.3 on Wednesday. COHERENT CORP released earnings Yesterday. In the last 6 months the stock gained 51.25%.
CIEN4.51%During Wednesday's pre-market session, CIENA CORP (NYSE:CIEN) exhibited strong growth, with the stock price climbing 4.51% to $405.02. Shareholders saw the stock price going 30.11% lower in the past 3 months.
VRT4.28%Pre-market trading on Wednesday showed positive momentum for VERTIV HOLDINGS CO-A (NYSE:VRT), as the stock price advanced 4.28% to reach $293.87. Yesterday the company had a press release: INVESTOR ALERT: Pomerantz Law Firm Investigates Claims On Behalf of Investors of Vertiv Holdings Co - VRT.
SNDK4.18%During Wednesday's pre-market session, SANDISK CORP (NASDAQ:SNDK) experienced a 4.18% increase, with the stock price reaching $1.32K. In the last month the share price dropped with 27.69%.
GLW3.65%The pre-market session on Wednesday saw a significant rise in CORNING INC's (NYSE:GLW) shares, climbing 3.65% to $165.0. The stock is trading 143.0% higher than a year ago.
ATO3.42%ATMOS ENERGY CORP (NYSE:ATO) recorded a 3.42% increase in share price during the pre-market session, reaching $175.0 on Wednesday.
MRVL3.41%MARVELL TECHNOLOGY INC's (NASDAQ:MRVL) stock price is advancing with 3.41% to a price of $219.56. The stock is trading 20.02% higher than 3 months ago.
WDC2.98%Pre-market trading on Wednesday showed positive momentum for WESTERN DIGITAL CORP (NASDAQ:WDC), as the stock price advanced 2.98% to reach $451.0. Shareholders saw the stock price going 22.26% lower in the past month.

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

Pre-market losers

TickerChangeComment
COR-4.45%CENCORA INC's (NYSE:COR) stock price recorded a 4.45% decrease, falling to $319.0. The stock is trading 29.55% higher than 3 months ago.
TYL-4.0%During Wednesday's pre-market session, the shares of TYLER TECHNOLOGIES INC (NYSE:TYL) declined by 4.0%, reaching $310.0. In the last year the stock lost 43.55%.
TRMB-2.55%The pre-market session on Wednesday witnessed a 2.55% decrease in TRIMBLE INC's (NASDAQ:TRMB) shares, with the stock price falling to $56.5. Earlier today the company had a press release: Trimble Announces Second Quarter 2026 Results and Raises Full Year Guidance.
RMD-2.15%Wednesday's pre-market session showed a 2.15% decrease in the stock price of RESMED INC (NYSE:RMD), reaching $220.01. In the last year the share price dropped with 21.08%.
NOW-2.08%The pre-market session on Wednesday witnessed a 2.08% decrease in SERVICENOW INC's (NYSE:NOW) shares, with the stock price falling to $124.89. Shareholders saw the stock price going 21.64% higher in the past month.

For the full premarket loser list go to our premarket losers page.

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