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

By Mill Chart - Last update: Aug 21, 2025

Curious about the top performers within the S&P500 index in the middle of the day on Thursday? Dive into the list of today's session's top gainers and losers for a comprehensive overview.


topmovers

Top gainers

TickerChangeComment
NDSN5.01%NORDSON CORP's (NASDAQ:NDSN) stock price displayed strong growth, advancing 5.01% and reaching $224.22 during Thursday's session. A press release (Nordson Corporation Reports Third Quarter Fiscal 2025 Results and Updates Full Year Guidance) was released yesterday.
PKG4.99%Positive market sentiment drove PACKAGING CORP OF AMERICA's (NYSE:PKG) stock price up by 4.99% to $208.0 during Thursday's session.
SW3.72%Investors celebrated as SMURFIT WESTROCK PLC (NYSE:SW) experienced a 3.72% rise in its shares, closing at $43.51 during Thursday's session. In the last 6 months the share price dropped with 21.09%.
HPE3.11%HEWLETT PACKARD ENTERPRISE's (NYSE:HPE) stock price is advancing with 3.11% to a price of $21.7. In the last 3 months the share price increased with 20.78%.
BG2.71%BUNGE GLOBAL SA's (NYSE:BG) stock price is advancing with 2.71% to a price of $84.61.
MRK2.68%MERCK & CO. INC. (NYSE:MRK) witnessed a notable 2.68% uptick in its shares, reaching $86.93 during Thursday's session. In the last year the share price dropped with 27.39%.
IP2.28%Investors celebrated as INTERNATIONAL PAPER CO (NYSE:IP) experienced a 2.28% rise in its shares, closing at $48.08 during Thursday's session.
DAY2.05%Investors celebrated as DAYFORCE INC (NYSE:DAY) experienced a 2.05% rise in its shares, closing at $68.78 during Thursday's session. A press release (DAY Stock Alert: Halper Sadeh LLC Is Investigating Whether the Sale of Dayforce, Inc. Is Fair to Shareholders) was released earlier today.
REGN1.84%REGENERON PHARMACEUTICALS's (NASDAQ:REGN) stock price increased by 1.84% to $601.91. A press release (EYLEA HD® (aflibercept) Injection 8 mg Applications for Expanded U.S. Label and Prefilled Syringe Receive FDA Review Period Extension) was released yesterday.
HUM1.63%HUMANA INC (NYSE:HUM) witnessed a notable 1.63% uptick in its shares, reaching $294.74 during Thursday's session. Earlier today the company had a press release: New Research from Humana Finds Value-Based Care Delivers Higher Quality of Care for Heart Failure Patients.

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

Today's top losers

TickerChangeComment
FSLR-6.58%FIRST SOLAR INC's (NASDAQ:FSLR) shares fell 6.58% to $192.86. Shareholders saw the stock price going 30.34% higher in the past 3 months.
WMT-4.65%The market experienced a 4.65% downturn in WALMART INC's (NYSE:WMT) stock price, closing at $97.8 during Thursday's session. The company's earnings where released Yesterday. A press release (Walmart reports revenue growth of 4.8%, up 5.6% in constant currency (cc)) was released earlier today.
ENPH-3.4%ENPHASE ENERGY INC's (NASDAQ:ENPH) stock price encountered a 3.4% decline, reaching $34.47 during Thursday's session. Shareholders saw the stock price going 44.98% lower is the past 6 months.
PCG-3.22%P G & E CORP's (NYSE:PCG) stock price is declining with 3.22% to a price of $14.87.
DHI-2.97%DR HORTON INC's (NYSE:DHI) stock price decreased by 2.97% to $158.51. In the last 3 months the share price increased with 37.69%.
FTNT-2.95%The market experienced a 2.95% downturn in FORTINET INC's (NASDAQ:FTNT) stock price, closing at $77.26 during Thursday's session. Earlier today the company had a press release: Fortinet, Inc. (FTNT) Investors Who Lost Money – Contact Law Offices of Howard G. Smith About Securities Fraud Investigation.
LII-2.89%There was a notable decline in LENNOX INTERNATIONAL INC's (NYSE:LII) shares, as they dropped 2.89% to $572.04 during Thursday's session.
UAL-2.66%Investors witnessed a 2.66% decrease in UNITED AIRLINES HOLDINGS INC's (NASDAQ:UAL) stock price, which closed at $97.18 during Thursday's session. In the last 3 months the stock gained 33.74%.
MRNA-2.53%The market experienced a downward movement in MODERNA INC's (NASDAQ:MRNA) stock price, closing at $26.21 with a 2.53% decrease during Thursday's session. A press release (Moderna to Present at Upcoming Conferences in September 2025) was released earlier today.
ALL-2.44%ALLSTATE CORP's (NYSE:ALL) shares fell 2.44% to $208.41 during Thursday's session. A press release (July 2025 Monthly Release) was released earlier today.

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

LENNOX INTERNATIONAL INC

NYSE:LII (2/18/2026, 8:04:00 PM)

After market: 553.89 0 (0%)

553.89

-11.61 (-2.05%)


BUNGE GLOBAL SA

NYSE:BG (2/18/2026, 8:15:53 PM)

After market: 121.77 0 (0%)

121.77

-0.11 (-0.09%)


PACKAGING CORP OF AMERICA

NYSE:PKG (2/18/2026, 8:04:00 PM)

After market: 239.03 0 (0%)

239.03

-1.34 (-0.56%)


INTERNATIONAL PAPER CO

NYSE:IP (2/18/2026, 8:04:00 PM)

After market: 48.48 0 (0%)

48.48

-0.57 (-1.16%)


ALLSTATE CORP

NYSE:ALL (2/18/2026, 8:13:59 PM)

After market: 209 -0.43 (-0.21%)

209.43

-2.89 (-1.36%)


REGENERON PHARMACEUTICALS

NASDAQ:REGN (2/18/2026, 8:00:01 PM)

After market: 793 +0.84 (+0.11%)

792.16

-1.37 (-0.17%)


MERCK & CO. INC.

NYSE:MRK (2/18/2026, 8:04:00 PM)

After market: 121.62 -0.04 (-0.03%)

121.66

+0.09 (+0.07%)


HUMANA INC

NYSE:HUM (2/18/2026, 8:04:00 PM)

After market: 187.12 0 (0%)

187.12

+2.13 (+1.15%)


NORDSON CORP

NASDAQ:NDSN (2/18/2026, 8:00:01 PM)

After market: 300 +0.71 (+0.24%)

299.29

+2.36 (+0.79%)


DR HORTON INC

NYSE:DHI (2/18/2026, 8:25:31 PM)

After market: 167.25 0 (0%)

167.25

+0.96 (+0.58%)


WALMART INC

NASDAQ:WMT (2/18/2026, 8:07:34 PM)

After market: 126.109 -0.51 (-0.4%)

126.62

-2.23 (-1.73%)


FIRST SOLAR INC

NASDAQ:FSLR (2/18/2026, 8:00:00 PM)

After market: 238.21 -0.36 (-0.15%)

238.57

+12.52 (+5.54%)


P G & E CORP

NYSE:PCG (2/18/2026, 8:04:00 PM)

After market: 17.88 0 (0%)

17.88

-0.14 (-0.78%)


FORTINET INC

NASDAQ:FTNT (2/18/2026, 8:00:00 PM)

After market: 80.45 -0.24 (-0.3%)

80.69

-1 (-1.22%)


ENPHASE ENERGY INC

NASDAQ:ENPH (2/18/2026, 8:00:01 PM)

After market: 46.04 0 (0%)

46.04

+0.4 (+0.88%)


HEWLETT PACKARD ENTERPRISE

NYSE:HPE (2/18/2026, 8:04:00 PM)

After market: 21.52 -0.03 (-0.14%)

21.55

-0.42 (-1.91%)


UNITED AIRLINES HOLDINGS INC

NASDAQ:UAL (2/18/2026, 8:05:31 PM)

After market: 116.65 -0.28 (-0.24%)

116.93

+2.91 (+2.55%)


MODERNA INC

NASDAQ:MRNA (2/18/2026, 8:00:01 PM)

After market: 46.94 +0.34 (+0.73%)

46.6

+2.67 (+6.08%)


DAYFORCE INC

NYSE:DAY (2/3/2026, 8:09:28 PM)

After market: 69.97 +0.11 (+0.16%)

69.86

+0.94 (+1.36%)


SMURFIT WESTROCK PLC

NYSE:SW (2/18/2026, 8:04:00 PM)

After market: 51.84 0 (0%)

51.84

+1.02 (+2.01%)



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