Which S&P500 stocks are showing activity after the closing bell on Wednesday?

Last update: Jan 7, 2026

The US market session of Wednesday is over, let's have a look at the top S&P500 gainers and losers in the after hours session today.


postmarket

After hours gainers

TickerChangeComment
PODD11.2%INSULET CORP's (NASDAQ:PODD) stock price is advancing with 11.2% to a price of $332.67. Two days ago the company had a press release: Insulet Redefines Diabetes at CES with "Liveable Technology" — A New Frontier in Human-Centered Connected Health.
LHX9.73%Impressive after-hours gains for L3HARRIS TECHNOLOGIES INC (NYSE:LHX) as its stock price advanced 9.73% to $339.89 during Wednesday's after-hours session. In the last year the share price increased with 48.72%.
LMT7.37%Notable gains for LOCKHEED MARTIN CORP (NYSE:LMT) in the after-hours session, with a 7.37% rise to $533.5 during Wednesday.
NOC5.2%Impressive after-hours gains for NORTHROP GRUMMAN CORP (NYSE:NOC) as its stock price advanced 5.2% to $607.0 during Wednesday's after-hours session. The stock is trading 25.8% higher than a year ago.
GD4.18%Positive market activity for GENERAL DYNAMICS CORP (NYSE:GD) after regular trading hours, with a 4.18% increase to $360.1 in the after-hours session on Wednesday. Shareholders saw the stock price going 33.26% higher is the past year.
RTX2.84%RTX CORP's (NYSE:RTX) stock price is advancing with 2.84% to a price of $191.01. In the last 6 months the stock gained 26.46%.
STZ2.68%CONSTELLATION BRANDS INC-A's (NYSE:STZ) stock price increased by 2.68% to $144.25. CONSTELLATION BRANDS INC-A released earnings Yesterday. In the last year the stock lost 22.73%.
PLTR2.24%After the regular session, PALANTIR TECHNOLOGIES INC-A (NASDAQ:PLTR) continues to impress in the after-hours session, with a 2.24% increase to $185.75. In the last 6 months the share price increased with 27.85%.
HSY2.18%HERSHEY CO/THE's (NYSE:HSY) stock price is advancing with 2.18% to a price of $184.0.
COST2.11%COSTCO WHOLESALE CORP's (NASDAQ:COST) shares rose 2.11% to $901.22.

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

CONSTELLATION BRANDS INC-A

NYSE:STZ (1/30/2026, 8:20:10 PM)

Premarket: 156.32 -0.38 (-0.24%)

156.7

+1.95 (+1.26%)


HERSHEY CO/THE

NYSE:HSY (1/30/2026, 8:04:00 PM)

After market: 194.74 -0.01 (-0.01%)

194.75

+4.21 (+2.21%)


INSULET CORP

NASDAQ:PODD (1/30/2026, 8:13:35 PM)

After market: 255.81 0 (0%)

255.81

+0.71 (+0.28%)


GENERAL DYNAMICS CORP

NYSE:GD (1/30/2026, 8:04:00 PM)

Premarket: 349.96 -1.13 (-0.32%)

351.09

+1.14 (+0.33%)


LOCKHEED MARTIN CORP

NYSE:LMT (1/30/2026, 10:00:08 PM)

Premarket: 622.45 -11.77 (-1.86%)

634.22

+11.71 (+1.88%)


NORTHROP GRUMMAN CORP

NYSE:NOC (1/30/2026, 8:09:20 PM)

Premarket: 689.17 -3.09 (-0.45%)

692.26

-3.09 (-0.44%)


COSTCO WHOLESALE CORP

NASDAQ:COST (1/30/2026, 8:00:00 PM)

Premarket: 941.56 +1.31 (+0.14%)

940.25

-12.64 (-1.33%)


L3HARRIS TECHNOLOGIES INC

NYSE:LHX (1/30/2026, 8:04:00 PM)

Premarket: 341 -1.85 (-0.54%)

342.85

-13.17 (-3.7%)


RTX CORP

NYSE:RTX (1/30/2026, 8:17:36 PM)

Premarket: 199.86 -1.07 (-0.53%)

200.93

+1.05 (+0.53%)


PALANTIR TECHNOLOGIES INC-A

NASDAQ:PLTR (1/30/2026, 8:13:22 PM)

Premarket: 149.1 +2.51 (+1.71%)

146.59

-5.27 (-3.47%)



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