Top S&P500 movers in Wednesday's pre-market session

Last update: May 14, 2025

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.

Gainers

TickerChangeComment
SMCI18.15%Investors witnessed a remarkable surge in SUPER MICRO COMPUTER INC (NASDAQ:SMCI) during Wednesday's pre-market session, with the stock price rising 18.15% to $45.95. Following yesterday's 16.02% increase, SMCI demonstrates further positive momentum in today's pre-market session with a 18.15% gain.
AMD4.17%ADVANCED MICRO DEVICES's (NASDAQ:AMD) shares rose 4.17% to $117.15. A press release (AMD and HUMAIN Form Strategic, $10B Collaboration to Advance Global AI) was released yesterday.
UNH3.4%UNITEDHEALTH GROUP INC (NYSE:UNH) experienced an impressive 3.4% increase in share price, reaching $321.97 during the pre-market session on Wednesday. Yesterday's -17.79% decline in UNH has given way to a potential bounce-back as observed in today's pre-market session. A press release (UNH BREAKING NEWS: UnitedHealth Group Incorporated Replaces CEO and Suspends Guidance – Contact BFA Law about the Class Action if You Lost Money (NYSE:UNH)) was released yesterday.
TSLA3.23%During Wednesday's pre-market trading, TESLA INC (NASDAQ:TSLA) demonstrated strong momentum, with the stock price rising 3.23% to $344.85. The stock is trading 32.38% higher than a month ago.
NVDA3.18%NVIDIA CORP (NASDAQ:NVDA) rose 3.18% to $134.06 during Wednesday's pre-market session. The stock is trading 40.5% higher than a year ago.
VST2.57%The pre-market session on Wednesday saw a significant rise in VISTRA CORP's (NYSE:VST) shares, climbing 2.57% to $158.98. The stock is trading 37.55% higher than a month ago.
NTAP2.48%The pre-market session on Wednesday saw a significant rise in NETAPP INC's (NASDAQ:NTAP) shares, climbing 2.48% to $102.0.
PLTR2.19%Investors witnessed a remarkable surge in PALANTIR TECHNOLOGIES INC-A (NASDAQ:PLTR) during Wednesday's pre-market session, with the stock price rising 2.19% to $130.9. The stock is trading 38.31% higher than a month ago.
ANET2.16%ARISTA NETWORKS INC's (NYSE:ANET) shares rose 2.16% to $99.35. Shareholders saw the stock price going 32.15% higher in the past month.

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

UNITEDHEALTH GROUP INC

NYSE:UNH (1/22/2026, 8:08:18 PM)

After market: 353.85 -0.62 (-0.17%)

354.47

+6.72 (+1.93%)


NETAPP INC

NASDAQ:NTAP (1/22/2026, 6:12:40 PM)

After market: 99.49 +0.24 (+0.24%)

99.25

+2.16 (+2.22%)


SUPER MICRO COMPUTER INC

NASDAQ:SMCI (1/22/2026, 8:02:43 PM)

After market: 32.86 +0.41 (+1.26%)

32.45

+0.21 (+0.65%)


ADVANCED MICRO DEVICES

NASDAQ:AMD (1/22/2026, 8:21:47 PM)

After market: 251.52 -2.21 (-0.87%)

253.73

+3.93 (+1.57%)


NVIDIA CORP

NASDAQ:NVDA (1/22/2026, 8:00:02 PM)

After market: 184.333 -0.51 (-0.27%)

184.84

+1.52 (+0.83%)


TESLA INC

NASDAQ:TSLA (1/22/2026, 8:07:24 PM)

After market: 450.48 +1.12 (+0.25%)

449.36

+17.92 (+4.15%)


ARISTA NETWORKS INC

NYSE:ANET (1/22/2026, 8:22:01 PM)

After market: 137.681 -0.73 (-0.53%)

138.41

+11.12 (+8.74%)


PALANTIR TECHNOLOGIES INC-A

NASDAQ:PLTR (1/22/2026, 11:04:30 PM)

After market: 165.78 -0.12 (-0.07%)

165.9

+0.57 (+0.34%)


VISTRA CORP

NYSE:VST (1/22/2026, 8:10:04 PM)

After market: 160.88 +0.52 (+0.32%)

160.36

+0.34 (+0.21%)



Find more stocks in the Stock Screener

Follow ChartMill for more
Follow us on StockTwitsFollow us on InstagramFollow us on FacebookFollow us on YouTube