National Grid PLC ADR (NGG) had the highest return in the 2000s by a US stock in the Utilities Sector, returning 592.4%.

ASSET	DECADE	% RETURN
National Grid PLC ADR (NGG)	2000s	592.39%
Suburban Propane Partners (SPH)	2000s	504.08%
Companhia de Saneamento Basico do Estado de Sao Paulo SABESP ADR (SBS)	2000s	487.89%
Consolidated Water (CWCO)	2000s	480.78%
UGI (UGI)	2000s	434.2%
Sempra Energy (SRE)	2000s	376.24%
Entergy (ETR)	2000s	338.91%
Centrais Elétricas Brasileiras SA - Eletrobrás (AXIA)	2000s	310.88%
PPL (PPL)	2000s	304.16%
Exelon (EXC)	2000s	286.7%
Southern (SO)	2000s	282.75%
MDU Resources (MDU)	2000s	265.03%
York Water (YORW)	2000s	264.6%
Nextera Energy (NEE)	2000s	256.94%
WEC Energy (WEC)	2000s	250.21%
OGE Energy (OGE)	2000s	231.31%
Companhia Energetica de Minas Gerais CEMIG Pref ADR (CIG)	2000s	219.68%
FirstEnergy (FE)	2000s	218.11%
Northwest Natural Gas (NWN)	2000s	215.96%
National Fuel Gas (NFG)	2000s	213.09%
Centrais Elétricas Brasileiras SA - Eletrobrás (EBR.B)	2000s	206.82%
NewJersey Resources (NJR)	2000s	206.51%
Dominion Energy (D)	2000s	203.3%
Public Service Enterprise (PEG)	2000s	198.08%
Companhia Paranaense de Energia Pref ADR (ELP)	2000s	188.17%