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

By Mill Chart

Last update: May 19, 2025

Stay updated with the movements of the S&P500 index one hour before the close of the markets on Monday. Discover which stocks are leading as top gainers and losers in today's session.

Today's top gainers

TickerChangeComment
UNH6.92%Investors celebrated as UNITEDHEALTH GROUP INC (NYSE:UNH) experienced a 6.92% rise in its shares, closing at $312.11 during Monday's session. A press release (UNITEDHEALTH GROUP INCORPORATED (NYSE: UNH) SHAREHOLDER ALERT Bernstein Liebhard LLP Reminds UnitedHealth Group Incorporated Investors of Upcoming Deadline) was released yesterday.
MRNA6.11%MODERNA INC's (NASDAQ:MRNA) stock price displayed strong growth, advancing 6.11% and reaching $26.38 during Monday's session. In the last 3 months the share price dropped with 24.64%.
DG4.63%DOLLAR GENERAL CORP's (NYSE:DG) shares rose 4.63% to $97.88 during Monday's session. In the last 3 months the share price increased with 28.93%.
GEV3.96%GE VERNOVA INC's (NYSE:GEV) stock price increased by 3.96% to $445.0. Shareholders saw the stock price going 32.3% higher in the past month.
HUM3.58%Exciting news for HUMANA INC (NYSE:HUM) as its stock price surged 3.58% to $246.49 during Monday's session. Shareholders saw the stock price going 33.19% lower is the past year.
TTWO3.05%Investors celebrated as TAKE-TWO INTERACTIVE SOFTWRE (NASDAQ:TTWO) experienced a 3.05% rise in its shares, closing at $233.65 during Monday's session. In the last 6 months the stock gained 27.65%.
GILD2.79%GILEAD SCIENCES INC (NASDAQ:GILD) experienced a significant 2.79% increase, reaching $105.36 during Monday's session. The stock is trading 51.36% higher than a year ago.
NI2.26%Investors celebrated as NISOURCE INC (NYSE:NI) experienced a 2.26% rise in its shares, closing at $39.97 during Monday's session. In the last year the share price increased with 33.7%.
BIIB2.25%BIOGEN INC's (NASDAQ:BIIB) shares rose 2.25% to $128.42 during Monday's session. In the last 6 months the share price dropped with 21.5%.
AZO2.17%AUTOZONE INC's (NYSE:AZO) shares rose 2.17% to $3.87K during Monday's session. Shareholders saw the stock price going 21.85% higher is the past 6 months.

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

Losers

TickerChangeComment
FSLR-9.57%During Monday's session, FIRST SOLAR INC's (NASDAQ:FSLR) shares took a tumble, falling 9.57% to $161.38. In the last month the share price increased with 39.44%.
ENPH-4.5%Investors witnessed a 4.5% drop in ENPHASE ENERGY INC's (NASDAQ:ENPH) stock price, which closed at $48.13 during Monday's session. In the last 3 months the share price dropped with 21.18%.
AES-4.34%AES CORP's (NYSE:AES) shares fell 4.34% to $11.68 during Monday's session. In the last 3 months the share price increased with 22.96%.
CZR-4.12%CAESARS ENTERTAINMENT INC's (NASDAQ:CZR) stock price is declining with 4.12% to a price of $29.43. Shareholders saw the stock price going 20.34% higher in the past month.
BBY-3.52%Investors witnessed a 3.52% drop in BEST BUY CO INC's (NYSE:BBY) stock price, which closed at $71.2 during Monday's session. BBY is releasing earnings today. In the last 6 months the stock lost 20.35%.
ON-2.92%ON SEMICONDUCTOR's (NASDAQ:ON) stock price is declining with 2.92% to a price of $43.61. In the last month the stock gained 29.68%.
BLDR-2.87%There was a notable decline in BUILDERS FIRSTSOURCE INC's (NYSE:BLDR) shares, as they dropped 2.87% to $117.18 during Monday's session. In the last 3 months the stock lost 21.61%.
TSLA-2.75%The market experienced a 2.75% downturn in TESLA INC's (NASDAQ:TSLA) stock price, closing at $340.36 during Monday's session. The stock is trading 45.0% higher than a month ago.
MPWR-2.71%The market experienced a downward movement in MONOLITHIC POWER SYSTEMS INC's (NASDAQ:MPWR) stock price, closing at $696.0 with a 2.71% decrease during Monday's session. In the last month the stock gained 36.64%.
PSX-2.64%The market experienced a downward movement in PHILLIPS 66's (NYSE:PSX) stock price, closing at $121.24 with a 2.64% decrease during Monday's session. In the last month the stock gained 26.87%.

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

BIOGEN INC

NASDAQ:BIIB (8/21/2025, 8:00:02 PM)

After market: 138 -1.12 (-0.81%)

139.12

+0.13 (+0.09%)


GILEAD SCIENCES INC

NASDAQ:GILD (8/21/2025, 8:15:09 PM)

After market: 116.45 +0.31 (+0.27%)

116.14

-2.59 (-2.18%)


HUMANA INC

NYSE:HUM (8/21/2025, 8:17:12 PM)

After market: 294.47 0 (0%)

294.47

+4.47 (+1.54%)


UNITEDHEALTH GROUP INC

NYSE:UNH (8/21/2025, 8:04:00 PM)

Premarket: 305.8 +2.45 (+0.81%)

303.35

+3.51 (+1.17%)


AUTOZONE INC

NYSE:AZO (8/21/2025, 9:54:01 PM)

After market: 4127.69 0 (0%)

4127.69

-30.41 (-0.73%)


BEST BUY CO INC

NYSE:BBY (8/21/2025, 8:04:00 PM)

After market: 72.4 +0.01 (+0.01%)

72.39

+0.12 (+0.17%)


BUILDERS FIRSTSOURCE INC

NYSE:BLDR (8/21/2025, 8:04:01 PM)

Premarket: 133.5 +0.28 (+0.21%)

133.22

+0.47 (+0.35%)


TAKE-TWO INTERACTIVE SOFTWRE

NASDAQ:TTWO (8/21/2025, 8:00:02 PM)

After market: 229 +1.13 (+0.5%)

227.87

-0.8 (-0.35%)


FIRST SOLAR INC

NASDAQ:FSLR (8/21/2025, 8:13:42 PM)

Premarket: 195.2 +3.2 (+1.67%)

192

-14.44 (-6.99%)


MONOLITHIC POWER SYSTEMS INC

NASDAQ:MPWR (8/21/2025, 8:00:02 PM)

After market: 820.74 0 (0%)

820.74

-5.53 (-0.67%)


NISOURCE INC

NYSE:NI (8/21/2025, 8:04:00 PM)

After market: 42.29 0 (0%)

42.29

-0.25 (-0.59%)


AES CORP

NYSE:AES (8/21/2025, 8:04:00 PM)

Premarket: 13.01 +0.04 (+0.31%)

12.97

-0.23 (-1.74%)


DOLLAR GENERAL CORP

NYSE:DG (8/21/2025, 8:05:07 PM)

After market: 112.41 -0.08 (-0.07%)

112.49

-2.36 (-2.05%)


TESLA INC

NASDAQ:TSLA (8/21/2025, 8:00:02 PM)

Premarket: 321.89 +1.78 (+0.56%)

320.11

-3.79 (-1.17%)


CAESARS ENTERTAINMENT INC

NASDAQ:CZR (8/21/2025, 8:03:18 PM)

Premarket: 25.12 +0.12 (+0.48%)

25

-0.22 (-0.87%)


ENPHASE ENERGY INC

NASDAQ:ENPH (8/21/2025, 8:06:48 PM)

Premarket: 34.71 +0.13 (+0.38%)

34.58

-1.1 (-3.08%)


PHILLIPS 66

NYSE:PSX (8/21/2025, 8:04:00 PM)

After market: 124.48 +0.03 (+0.02%)

124.45

+0.88 (+0.71%)


ON SEMICONDUCTOR

NASDAQ:ON (8/21/2025, 8:00:02 PM)

After market: 48.9899 +0.18 (+0.37%)

48.81

-0.66 (-1.33%)


MODERNA INC

NASDAQ:MRNA (8/21/2025, 8:00:02 PM)

Premarket: 26.36 +0.14 (+0.53%)

26.22

-0.67 (-2.49%)


GE VERNOVA INC

NYSE:GEV (8/21/2025, 8:14:51 PM)

Premarket: 608.96 +2.96 (+0.49%)

606

+1.41 (+0.23%)



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