S&P 500 close — Monday, 18 May 2026

S&P 500 closed down 0.06%

S&P 500 treemap for Monday, 18 May 2026: each company sized by market capitalisation and coloured by its move that day

S&P 500 movers — May 18, 2026

Of the 501 companies tracked in the S&P 500, 354 rose and 145 fell, with 2 unchanged. Energy led the day at +1.79%, while Technology lagged at -0.82%.

Top gainers · S&P 500

D Dominion Energy, Inc. +9.44%
CTSH Cognizant Technology Solutions +9.06%
NOW ServiceNow, Inc. +8.78%
FICO Fair Isaac Corporation +7.58%
IT Gartner, Inc. +6.29%
CPAY Corpay, Inc. +6.18%
BSX Boston Scientific Corporation +6.15%
DXCM DexCom, Inc. +5.61%

Top losers · S&P 500

REGN Regeneron Pharmaceuticals, Inc. -9.82%
LITE Lumentum Holdings Inc. -8.83%
VRT Vertiv Holdings, LLC -8.41%
FIX Comfort Systems USA, Inc. -6.94%
GLW Corning Incorporated -6.91%
STX Seagate Technology Holdings PLC -6.87%
PWR Quanta Services, Inc. -6.10%
MU Micron Technology, Inc. -5.95%

By sector

Energy +1.79%
Consumer Staples +1.28%
Financials +1.16%
Real Estate +1.14%
Healthcare +0.42%
Communication Services +0.30%
Consumer Discretionary +0.20%
Utilities +0.13%
Materials -0.11%
Industrials -0.37%
Technology -0.82%

Open the interactive S&P 500 map ← 15 May 2026 19 May 2026 →All sessions

The same session elsewhere: NASDAQ Dow Jones TSX

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