HF Sinclair (DINO) had the highest return between 1999 and 2008 by a large-cap US stock in the Energy Sector, returning 989.4%.

ASSET	YEARS	% RETURN
HF Sinclair (DINO)	1999-2008	989.35%
Occidental Petroleum (OXY)	1999-2008	837.53%
EOG Resources (EOG)	1999-2008	715.71%
Woodside Energy (WDS)	1999-2008	711.53%
Imperial Oil (IMO)	1999-2008	681.57%
Tenaris SA ADR (TS)	1999-2008	650.84%
Petroleo Brasileiro Petrobras SA ADR (PBR)	1999-2008	587.95%
Cameco (CCJ)	1999-2008	542.47%
Canadian Natural Resources (CNQ)	1999-2008	528.56%
Ovintiv (OVV)	1999-2008	490.38%
EQT (EQT)	1999-2008	483.43%
Suncor Energy (SU)	1999-2008	476.3%
Enterprise Products Partners (EPD)	1999-2008	465.48%
Petróleo Brasileiro SA - Petrobras (PBR.A)	1999-2008	459.63%
Contura Energy (CTRA)	1999-2008	444.69%
Devon Energy (DVN)	1999-2008	353.88%
Plains All American Pipeline (PAA)	1999-2008	324.96%
Valero Energy (VLO)	1999-2008	309.2%
Enbridge (ENB)	1999-2008	304.54%
YPF Sociedad Anonima (YPF)	1999-2008	286.21%
Texas Pacific Land Trust (TPL)	1999-2008	249.62%
ConocoPhillips (COP)	1999-2008	215.95%
Equinor ASA ADR (EQNR)	1999-2008	191.16%
Eni SpA ADR (E)	1999-2008	185.76%
TotalEnergies SE ADR (TTE)	1999-2008	183.97%

Large-cap stocks are treated as having a market cap of $10B+.