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What's going on in today's pre-market session: S&P500 movers

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


premarket

Pre-market gainers in the S&P500

TickerChangeComment
KLAC4.84%The pre-market session on Tuesday saw a significant rise in KLA CORP's (NASDAQ:KLAC) shares, climbing 4.84% to $233.0. Shareholders saw the stock price going 24.06% higher in the past 3 months.
MPWR4.54%The pre-market session on Tuesday saw a significant rise in MONOLITHIC POWER SYSTEMS INC's (NASDAQ:MPWR) shares, climbing 4.54% to $1.35K. In the last month the share price increased with 712.0%.
AMAT4.44%Investors witnessed a remarkable surge in APPLIED MATERIALS INC (NASDAQ:AMAT) during Tuesday's pre-market session, with the stock price rising 4.44% to $600.93. In the last 3 months the stock gained 44.96%.
GLW4.1%CORNING INC's (NYSE:GLW) stock price is advancing with 4.1% to a price of $190.61. In the last 6 months the stock gained 94.38%.
LITE4.03%LUMENTUM HOLDINGS INC (NASDAQ:LITE) experienced an impressive 4.03% increase in share price, reaching $799.1 during the pre-market session on Tuesday. Yesterday the company had a press release: Lumentum Announces Reporting Date for Fourth Quarter and Fiscal Year 2026 Results.
TER4.01%Investors witnessed a remarkable surge in TERADYNE INC (NASDAQ:TER) during Tuesday's pre-market session, with the stock price rising 4.01% to $354.78. Shareholders saw the stock price going 49.51% higher is the past 6 months.
WDC3.84%WESTERN DIGITAL CORP (NASDAQ:WDC) experienced an impressive 3.84% increase in share price, reaching $576.89 during the pre-market session on Tuesday. Yesterday the company had a press release: WD to Announce Fourth Quarter and Fiscal Year 2026 Financial Results on August 5, 2026.
ON3.78%During Tuesday's pre-market session, ON SEMICONDUCTOR (NASDAQ:ON) exhibited strong growth, with the stock price climbing 3.78% to $93.79. In the last month the stock lost 22.07%.
LRCX3.78%Investors witnessed a remarkable surge in LAM RESEARCH CORP (NASDAQ:LRCX) during Tuesday's pre-market session, with the stock price rising 3.78% to $342.4. Shareholders saw the stock price going 23.29% higher in the past 3 months.
MCHP3.72%MICROCHIP TECHNOLOGY INC (NASDAQ:MCHP) rose 3.72% to $87.36 during Tuesday's pre-market session. A press release (Microchip Advances Neural Network Implementation with VectorBlox™ 3.0 Accelerator SDK) was released earlier today.

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

Pre-market losers

TickerChangeComment
IBM-22.67%INTL BUSINESS MACHINES CORP's (NYSE:IBM) shares experienced a 22.67% decline, falling to $224.43 during Tuesday's pre-market session.
HCA-9.91%Investors observed a 9.91% decline in HCA HEALTHCARE INC's (NYSE:HCA) stock price, which now stands at $352.0 during Tuesday's pre-market session. Earlier today the company had a press release: HCA Healthcare, Inc. 2nd Quarter 2026 Earnings Conference Call.
WDAY-8.88%Investors observed a 8.88% decline in WORKDAY INC-CLASS A's (NASDAQ:WDAY) stock price, which now stands at $132.0 during Tuesday's pre-market session. The stock is trading 22.47% lower than 6 months ago.
NOW-8.01%Despite yesterday's decline, SERVICENOW INC (NYSE:NOW) experienced a further 8.01% decrease in share price during Tuesday's pre-market session, reaching $102.35. Shareholders saw the stock price going 42.26% lower is the past year.
ACN-7.23%ACCENTURE PLC-CL A's (NYSE:ACN) stock price decreased by 7.23% to $128.5. In the last 3 months the stock lost 29.92%.
CTSH-7.16%Despite yesterday's decline, COGNIZANT TECH SOLUTIONS-A (NASDAQ:CTSH) experienced a further 7.16% decrease in share price during Tuesday's pre-market session, reaching $41.0. In the last 3 months the stock lost 27.96%.
INTU-6.59%INTUIT INC's (NASDAQ:INTU) stock price is declining with 6.59% to a price of $270.67. Earlier today the company had a press release: INTU Court News: Intuit Inc. Class Action Lawsuit Alleges Securities Fraud on behalf of Investors with Losses.
UHS-6.39%UNIVERSAL HEALTH SERVICES-B's (NYSE:UHS) stock price is declining with 6.39% to a price of $143.0. In the last 6 months the stock lost 23.57%.
CSGP-6.15%COSTAR GROUP INC's (NASDAQ:CSGP) stock price recorded a 6.15% decrease, falling to $27.0. A press release (CoStar Group Promotes Robin Rossmann to Chief Financial Officer to Drive Margin Expansion and Profitable Growth) was released yesterday.
CRM-5.85%SALESFORCE INC's (NYSE:CRM) shares fell 5.85% to $161.2 during Tuesday's pre-market session. In the last 6 months the stock lost 24.61%.

Our premarket losers page will show you the full list.

Read full article here »

In-Depth Zacks Research for the Tickers Above

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Accenture PLC (ACN)

Applied Materials, Inc. (AMAT)

Salesforce, Inc. (CRM)

CoStar Group, Inc. (CSGP)

Cognizant Technology Solutions Corporation (CTSH)

Corning Incorporated (GLW)

HCA Healthcare, Inc. (HCA)

International Business Machines Corporation (IBM)

Intuit Inc. (INTU)

KLA Corporation (KLAC)

Lumentum Holdings Inc. (LITE)

Lam Research Corporation (LRCX)

Microchip Technology Incorporated (MCHP)

Monolithic Power Systems, Inc. (MPWR)

ServiceNow, Inc. (NOW)

ON Semiconductor Corporation (ON)

Teradyne, Inc. (TER)

Universal Health Services, Inc. (UHS)

Workday, Inc. (WDAY)

Western Digital Corporation (WDC)