S&P 500 close — Wednesday, 1 October 2025

S&P 500 closed up 0.44%

S&P 500 treemap for Wednesday, 1 October 2025: each company sized by market capitalisation and coloured by its move that day

S&P 500 movers — October 1, 2025

Of the 500 companies tracked in the S&P 500, 218 rose and 281 fell, with 1 unchanged. Healthcare led the day at +3.21%, while Materials lagged at -1.09%.

Top gainers · S&P 500

AES The AES Corporation +16.79%
BIIB Biogen Inc. +10.09%
TMO Thermo Fisher Scientific Inc +9.42%
SMCI Super Micro Computer, Inc. +9.28%
CRL Charles River Laboratories Inte +8.96%
MU Micron Technology, Inc. +8.86%
STX Seagate Technology Holdings PLC +8.80%
WDC Western Digital Corporation +8.77%

Top losers · S&P 500

RDDT Reddit, Inc. -11.91%
CTVA Corteva, Inc. -9.11%
NWS News Corporation -6.05%
NWSA News Corporation -5.73%
HUM Humana Inc. -5.15%
OMC Omnicom Group Inc. -5.00%
IT Gartner, Inc. -4.52%
DGX Quest Diagnostics Incorporated -4.47%

By sector

Healthcare +3.21%
Utilities +1.05%
Technology +0.59%
Consumer Discretionary +0.49%
Consumer Staples +0.05%
Energy -0.01%
Real Estate -0.04%
Communication Services -0.07%
Industrials -0.21%
Financials -0.89%
Materials -1.09%

Open the interactive S&P 500 map ← 30 Sep 2025 2 Oct 2025 →All sessions

The same session elsewhere: NASDAQ Dow Jones TSX

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