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Get insights into the top movers in the S&P500 index of Wednesday's pre-market session.

The US market session of Wednesday has yet to be opened, let's have a look at the top S&P500 gainers and losers in the pre-market session today.


premarket

Pre-market gainers in the S&P500

TickerChangeComment
TER10.9%Exciting news for TERADYNE INC (NASDAQ:TER) as their shares soared 10.9% to $355.61 during the pre-market session on Wednesday. Earlier today the company had a press release: Coordinated Robot Fleets Are Fast Becoming the Next Frontier in Autonomous Operations.
GEHC9.98%During Wednesday's pre-market session, GE HEALTHCARE TECHNOLOGY (NASDAQ:GEHC) experienced a 9.98% increase, with the stock price reaching $70.51. Earlier today the company had a press release: GE HealthCare reports second quarter 2026 financial results.
GNRC9.92%GENERAC HOLDINGS INC's (NYSE:GNRC) stock price is advancing with 9.92% to a price of $215.01. Earlier today the company had a press release: Generac Reports Second Quarter 2026 Results.
APH6.01%AMPHENOL CORP-CL A's (NYSE:APH) stock price is advancing with 6.01% to a price of $152.5. AMPHENOL CORP-CL A released earnings Yesterday. Earlier today the company had a press release: Amphenol Reports Record Second Quarter 2026 Results.
JCI5.85%The pre-market session on Wednesday saw a significant rise in JOHNSON CONTROLS INTERNATION's (NYSE:JCI) shares, climbing 5.85% to $148.49. A press release (Johnson Controls Reports Strong Q3 Results; Raises FY26 Guidance) was released earlier today.
F4.95%FORD MOTOR CO's (NYSE:F) shares rose 4.95% to $15.7 during Wednesday's pre-market session. Earlier today the company had a press release: FORD NAMES MARIA GRAZIA DAVINO VICE PRESIDENT, SALES, FORD OF EUROPE.
GRMN4.56%GARMIN LTD's (NYSE:GRMN) shares surged 4.56% to reach $265.22 during the pre-market session on Wednesday. A press release (Garmin announces second quarter 2026 results) was released earlier today.
STX4.11%The pre-market session on Wednesday saw a significant rise in SEAGATE TECHNOLOGY HOLDINGS's (NASDAQ:STX) shares, climbing 4.11% to $777.99. A press release (Seagate Technology Reports Fiscal Fourth Quarter and Fiscal Year 2026 Financial Results) was released yesterday.
IEX3.52%IDEX CORP (NYSE:IEX) rose 3.52% to $232.55 during Wednesday's pre-market session. A press release (IDEX Reports Second Quarter Results) was released earlier today.
APA3.01%APA CORP's (NASDAQ:APA) stock price is advancing with 3.01% to a price of $35.98. In the last 6 months the share price increased with 32.26%.

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

Today's pre-market losers

TickerChangeComment
CSGP-14.74%Wednesday's pre-market session showed a 14.74% decrease in the stock price of COSTAR GROUP INC (NASDAQ:CSGP), reaching $25.86. A press release (CoStar Group Q2 2026 Results Mark a Profitability Inflection with Revenue Up 18%, Net Income Increasing 817%, and Adjusted EBITDA More Than Doubling Year-over-Year) was released yesterday.
VRT-12.38%Today's pre-market session reveals a 12.38% decline in the stock price of VERTIV HOLDINGS CO-A (NYSE:VRT), now priced at $236.19. Earlier today the company had a press release: Vertiv Reports Strong Second Quarter 2026 with Diluted EPS Growth of 53% (Adjusted Diluted EPS Growth of +60%); Raises Full Year 2026 Guidance Across All Key Metrics.
LII-10.86%LENNOX INTERNATIONAL INC's (NYSE:LII) stock price is declining with 10.86% to a price of $485.0. Earlier today the company had a press release: Lennox Reports 2026 Second Quarter Results.
SWKS-10.31%Despite yesterday's decline, SKYWORKS SOLUTIONS INC (NASDAQ:SWKS) experienced a further 10.31% decrease in share price during Wednesday's pre-market session, reaching $58.01. A press release (Skyworks Delivers Solid Third Quarter Fiscal Year 2026 Results; Announces Key Steps Toward Qorvo Combination) was released yesterday.
KLAC-9.29%Wednesday's pre-market session showed a 9.29% decrease in the stock price of KLA CORP (NASDAQ:KLAC), reaching $173.07. Yesterday the company had a press release: KLA CORPORATION REPORTS FISCAL 2026 FOURTH QUARTER AND FULL YEAR RESULTS.
BSX-8.92%BOSTON SCIENTIFIC CORP's (NYSE:BSX) stock price decreased by 8.92% to $41.95. Earlier today the company had a press release: Boston Scientific announces results for second quarter 2026.
MAS-8.1%Despite yesterday's decline, MASCO CORP (NYSE:MAS) experienced a further 8.1% decrease in share price during Wednesday's pre-market session, reaching $75.0. Earlier today the company had a press release: Masco Corporation Reports Second Quarter 2026 Results.
HUM-6.1%HUMANA INC's (NYSE:HUM) stock price is declining with 6.1% to a price of $365.0. Earlier today the company had a press release: Humana Elects Paul Smith and Frederick Crawford to Board of Directors.
SW-5.91%SMURFIT WESTROCK PLC's (NYSE:SW) shares fell 5.91% to $47.8 during Wednesday's pre-market session. Earlier today the company had a press release: Smurfit Westrock Reports Second Quarter 2026 Results.
FLEX-5.54%The pre-market session on Wednesday witnessed a 5.54% decrease in FLEX LTD's (NASDAQ:FLEX) shares, with the stock price falling to $107.0. A press release (Flex Announces Leadership Teams for Flex and Planned Cloud and Power Infrastructure Spin-Off (SpinCo)) was released earlier today.

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

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APA Corporation (APA)

Amphenol Corporation (APH)

Boston Scientific Corporation (BSX)

CoStar Group, Inc. (CSGP)

Ford Motor Company (F)

Flex Ltd. (FLEX)

GE HealthCare Technologies Inc. (GEHC)

Generac Holdings Inc. (GNRC)

Garmin Ltd. (GRMN)

Humana Inc. (HUM)

IDEX Corporation (IEX)

Johnson Controls International plc (JCI)

KLA Corporation (KLAC)

Lennox International, Inc. (LII)

Masco Corporation (MAS)

Seagate Technology Holdings PLC (STX)

Smurfit Westrock PLC (SW)

Skyworks Solutions, Inc. (SWKS)

Teradyne, Inc. (TER)

Vertiv Holdings Co. (VRT)