National Grid PLC ADR (NGG) had the highest return between 2004 and 2006 by a US stock with a market cap of $2B+, returning 1,344,788.2%.

ASSET	YEARS	% RETURN
National Grid PLC ADR (NGG)	2004-2006	1,344,788.24%
Monster Beverage (MNST)	2004-2006	3,100.34%
Banco Bradesco SA ADR (BBD)	2004-2006	918.21%
Tenaris SA ADR (TS)	2004-2006	714.54%
Apple (AAPL)	2004-2006	687.54%
HF Sinclair (DINO)	2004-2006	667.01%
CME (CME)	2004-2006	617.55%
Allegheny Technologies (ATI)	2004-2006	609.24%
Grupo Cibest (CIB)	2004-2006	569.36%
WESCO International (WCC)	2004-2006	563.03%
Denison Mines (DNN)	2004-2006	555.99%
Seaboard (SEB)	2004-2006	532.41%
Suzano Papel e Celulose SA ADR (SUZ)	2004-2006	511.16%
American Eagle Outfitters (AEO)	2004-2006	482.18%
Intuitive Surgical (ISRG)	2004-2006	460.82%
Clean Harbors (CLH)	2004-2006	444.54%
Hologic (HOLX)	2004-2006	440.65%
Illumina (ILMN)	2004-2006	438.49%
CBRE Group Inc Class A (CBRE)	2004-2006	424.21%
ArcelorMittal SA ADR (MT)	2004-2006	418.82%
America Movil SAB de CV ADR (AMX)	2004-2006	413.93%
Icahn Enterprises (IEP)	2004-2006	411.8%
BRF SA ADR (BRFS)	2004-2006	410.43%
Hub (HUBG)	2004-2006	402.51%
Cheniere Energy (LNG)	2004-2006	393.93%